* [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes
@ 2022-03-11 15:11 Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 1/8] Don't add access size hints to fortifiable functions Siddhesh Poyarekar
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: Siddhesh Poyarekar @ 2022-03-11 15:11 UTC (permalink / raw)
To: libc-stable; +Cc: carlos, fweimer
Backport _FORTIFY_SOURCE=3 support for gcc 12 into 2.34 along with testing
improvements and miscellaneous fixes.
Siddhesh Poyarekar (8):
Don't add access size hints to fortifiable functions
Make sure that the fortified function conditionals are constant
debug: Add tests for _FORTIFY_SOURCE=3
__glibc_unsafe_len: Fix comment
fortify: Fix spurious warning with realpath
Enable _FORTIFY_SOURCE=3 for gcc 12 and above
debug: Autogenerate _FORTIFY_SOURCE tests
debug: Synchronize feature guards in fortified functions [BZ #28746]
Makerules | 6 +
debug/Makefile | 113 +++++++++-----
debug/tst-chk2.c | 2 -
debug/tst-chk3.c | 2 -
debug/tst-chk4.cc | 1 -
debug/tst-chk5.cc | 2 -
debug/tst-chk6.cc | 2 -
debug/{tst-chk1.c => tst-fortify.c} | 153 ++++++++++++-------
debug/tst-lfschk1.c | 2 -
debug/tst-lfschk2.c | 2 -
debug/tst-lfschk3.c | 2 -
debug/tst-lfschk4.cc | 2 -
debug/tst-lfschk5.cc | 2 -
debug/tst-lfschk6.cc | 2 -
debug/tst-realpath-chk.c | 37 +++++
include/features.h | 4 +-
io/bits/poll2.h | 31 +---
io/sys/poll.h | 6 +-
libio/bits/stdio2.h | 110 ++++++--------
libio/stdio.h | 4 +-
misc/sys/cdefs.h | 60 +++++++-
posix/bits/unistd.h | 176 +++++-----------------
posix/unistd.h | 28 ++--
socket/bits/socket2.h | 34 ++---
stdlib/bits/stdlib.h | 57 +++----
stdlib/stdlib.h | 5 +-
string/bits/string_fortified.h | 13 +-
string/string.h | 2 +-
support/xsignal.h | 2 +
wcsmbs/bits/wchar2.h | 221 ++++++++--------------------
30 files changed, 498 insertions(+), 585 deletions(-)
delete mode 100644 debug/tst-chk2.c
delete mode 100644 debug/tst-chk3.c
delete mode 100644 debug/tst-chk4.cc
delete mode 100644 debug/tst-chk5.cc
delete mode 100644 debug/tst-chk6.cc
rename debug/{tst-chk1.c => tst-fortify.c} (90%)
delete mode 100644 debug/tst-lfschk1.c
delete mode 100644 debug/tst-lfschk2.c
delete mode 100644 debug/tst-lfschk3.c
delete mode 100644 debug/tst-lfschk4.cc
delete mode 100644 debug/tst-lfschk5.cc
delete mode 100644 debug/tst-lfschk6.cc
create mode 100644 debug/tst-realpath-chk.c
--
2.35.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [committed 2.34 1/8] Don't add access size hints to fortifiable functions
2022-03-11 15:11 [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes Siddhesh Poyarekar
@ 2022-03-11 15:11 ` Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 2/8] Make sure that the fortified function conditionals are constant Siddhesh Poyarekar
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Siddhesh Poyarekar @ 2022-03-11 15:11 UTC (permalink / raw)
To: libc-stable; +Cc: carlos, fweimer
In the context of a function definition, the size hints imply that the
size of an object pointed to by one parameter is another parameter.
This doesn't make sense for the fortified versions of the functions
since that's the bit it's trying to validate.
This is harmless with __builtin_object_size since it has fairly simple
semantics when it comes to objects passed as function parameters.
With __builtin_dynamic_object_size we could (as my patchset for gcc[1]
already does) use the access attribute to determine the object size in
the general case but it misleads the fortified functions.
Basically the problem occurs when access attributes are present on
regular functions that have inline fortified definitions to generate
_chk variants; the attributes get inherited by these definitions,
causing problems when analyzing them. For example with poll(fds, nfds,
timeout), nfds is hinted using the __attr_access as being the size of
fds.
Now, when analyzing the inline function definition in bits/poll2.h, the
compiler sees that nfds is the size of fds and tries to use that
information in the function body. In _FORTIFY_SOURCE=3 case, where the
object size could be a non-constant expression, this information results
in the conclusion that nfds is the size of fds, which defeats the
purpose of the implementation because we're trying to check here if nfds
does indeed represent the size of fds. Hence for this case, it is best
to not have the access attribute.
With the attributes gone, the expression evaluation should get delayed
until the function is actually inlined into its destinations.
Disable the access attribute for fortified function inline functions
when building at _FORTIFY_SOURCE=3 to make this work better. The
access attributes remain for the _chk variants since they can be used
by the compiler to warn when the caller is passing invalid arguments.
[1] https://gcc.gnu.org/pipermail/gcc-patches/2021-October/581125.html
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
(cherry picked from commit e938c02748402c50f60ba0eb983273e7b52937d1)
---
io/bits/poll2.h | 4 ++--
io/sys/poll.h | 6 +++---
libio/bits/stdio2.h | 4 ++--
libio/stdio.h | 4 ++--
misc/sys/cdefs.h | 10 ++++++++++
posix/unistd.h | 28 ++++++++++++++++------------
stdlib/stdlib.h | 5 +++--
string/bits/string_fortified.h | 5 +++--
string/string.h | 2 +-
9 files changed, 42 insertions(+), 26 deletions(-)
diff --git a/io/bits/poll2.h b/io/bits/poll2.h
index a623678c09..be74d020f2 100644
--- a/io/bits/poll2.h
+++ b/io/bits/poll2.h
@@ -33,7 +33,7 @@ extern int __REDIRECT (__poll_chk_warn, (struct pollfd *__fds, nfds_t __nfds,
__poll_chk)
__warnattr ("poll called with fds buffer too small file nfds entries");
-__fortify_function __attr_access ((__write_only__, 1, 2)) int
+__fortify_function __fortified_attr_access (__write_only__, 1, 2) int
poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
{
if (__glibc_objsize (__fds) != (__SIZE_TYPE__) -1)
@@ -64,7 +64,7 @@ extern int __REDIRECT (__ppoll_chk_warn, (struct pollfd *__fds, nfds_t __nfds,
__ppoll_chk)
__warnattr ("ppoll called with fds buffer too small file nfds entries");
-__fortify_function __attr_access ((__write_only__, 1, 2)) int
+__fortify_function __fortified_attr_access (__write_only__, 1, 2) int
ppoll (struct pollfd *__fds, nfds_t __nfds, const struct timespec *__timeout,
const __sigset_t *__ss)
{
diff --git a/io/sys/poll.h b/io/sys/poll.h
index e640efb2bc..751c7f5f72 100644
--- a/io/sys/poll.h
+++ b/io/sys/poll.h
@@ -52,7 +52,7 @@ __BEGIN_DECLS
This function is a cancellation point and therefore not marked with
__THROW. */
extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
- __attr_access ((__write_only__, 1, 2));
+ __fortified_attr_access (__write_only__, 1, 2);
#ifdef __USE_GNU
/* Like poll, but before waiting the threads signal mask is replaced
@@ -64,7 +64,7 @@ extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
extern int ppoll (struct pollfd *__fds, nfds_t __nfds,
const struct timespec *__timeout,
const __sigset_t *__ss)
- __attr_access ((__write_only__, 1, 2));
+ __fortified_attr_access (__write_only__, 1, 2);
# ifdef __USE_TIME_BITS64
# ifdef __REDIRECT
@@ -72,7 +72,7 @@ extern int __REDIRECT (ppoll, (struct pollfd *__fds, nfds_t __nfds,
const struct timespec *__timeout,
const __sigset_t *__ss),
__ppoll64)
- __attr_access ((__write_only__, 1, 2));
+ __fortified_attr_access (__write_only__, 1, 2);
# else
# define ppoll __ppoll64
# endif
diff --git a/libio/bits/stdio2.h b/libio/bits/stdio2.h
index 3f0cab1254..4f016a5638 100644
--- a/libio/bits/stdio2.h
+++ b/libio/bits/stdio2.h
@@ -258,7 +258,7 @@ extern char *__REDIRECT (__fgets_chk_warn,
__wur __warnattr ("fgets called with bigger size than length "
"of destination buffer");
-__fortify_function __wur __attr_access ((__write_only__, 1, 2)) char *
+__fortify_function __wur __fortified_attr_access (__write_only__, 1, 2) char *
fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
{
if (__glibc_objsize (__s) != (size_t) -1)
@@ -320,7 +320,7 @@ extern char *__REDIRECT (__fgets_unlocked_chk_warn,
__wur __warnattr ("fgets_unlocked called with bigger size than length "
"of destination buffer");
-__fortify_function __wur __attr_access ((__write_only__, 1, 2)) char *
+__fortify_function __wur __fortified_attr_access (__write_only__, 1, 2) char *
fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream)
{
if (__glibc_objsize (__s) != (size_t) -1)
diff --git a/libio/stdio.h b/libio/stdio.h
index 497da016ff..abefe640e5 100644
--- a/libio/stdio.h
+++ b/libio/stdio.h
@@ -584,7 +584,7 @@ extern int putw (int __w, FILE *__stream);
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
- __wur __attr_access ((__write_only__, 1, 2));
+ __wur __fortified_attr_access (__write_only__, 1, 2);
#if __GLIBC_USE (DEPRECATED_GETS)
/* Get a newline-terminated string from stdin, removing the newline.
@@ -608,7 +608,7 @@ extern char *gets (char *__s) __wur __attribute_deprecated__;
therefore not marked with __THROW. */
extern char *fgets_unlocked (char *__restrict __s, int __n,
FILE *__restrict __stream) __wur
- __attr_access ((__write_only__, 1, 2));
+ __fortified_attr_access (__write_only__, 1, 2);
#endif
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index e490fc1aeb..cd836441a9 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -603,12 +603,22 @@ _Static_assert (0, "IEEE 128-bits long double requires redirection on this platf
size-index is not provided:
access (access-mode, <ref-index> [, <size-index>]) */
# define __attr_access(x) __attribute__ ((__access__ x))
+/* For _FORTIFY_SOURCE == 3 we use __builtin_dynamic_object_size, which may
+ use the access attribute to get object sizes from function definition
+ arguments, so we can't use them on functions we fortify. Drop the object
+ size hints for such functions. */
+# if __USE_FORTIFY_LEVEL == 3
+# define __fortified_attr_access(a, o, s) __attribute__ ((__access__ (a, o)))
+# else
+# define __fortified_attr_access(a, o, s) __attr_access ((a, o, s))
+# endif
# if __GNUC_PREREQ (11, 0)
# define __attr_access_none(argno) __attribute__ ((__access__ (__none__, argno)))
# else
# define __attr_access_none(argno)
# endif
#else
+# define __fortified_attr_access(a, o, s)
# define __attr_access(x)
# define __attr_access_none(argno)
#endif
diff --git a/posix/unistd.h b/posix/unistd.h
index 8224c5fbc9..7a61ff5e86 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -369,7 +369,7 @@ extern void closefrom (int __lowfd) __THROW;
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t read (int __fd, void *__buf, size_t __nbytes) __wur
- __attr_access ((__write_only__, 2, 3));
+ __fortified_attr_access (__write_only__, 2, 3);
/* Write N bytes of BUF to FD. Return the number written, or -1.
@@ -388,7 +388,7 @@ extern ssize_t write (int __fd, const void *__buf, size_t __n) __wur
__THROW. */
extern ssize_t pread (int __fd, void *__buf, size_t __nbytes,
__off_t __offset) __wur
- __attr_access ((__write_only__, 2, 3));
+ __fortified_attr_access (__write_only__, 2, 3);
/* Write N bytes of BUF to FD at the given position OFFSET without
changing the file pointer. Return the number written, or -1.
@@ -404,7 +404,7 @@ extern ssize_t pwrite (int __fd, const void *__buf, size_t __n,
extern ssize_t __REDIRECT (pread, (int __fd, void *__buf, size_t __nbytes,
__off64_t __offset),
pread64) __wur
- __attr_access ((__write_only__, 2, 3));
+ __fortified_attr_access (__write_only__, 2, 3);
extern ssize_t __REDIRECT (pwrite, (int __fd, const void *__buf,
size_t __nbytes, __off64_t __offset),
pwrite64) __wur
@@ -421,7 +421,7 @@ extern ssize_t __REDIRECT (pwrite, (int __fd, const void *__buf,
or 0 for EOF. */
extern ssize_t pread64 (int __fd, void *__buf, size_t __nbytes,
__off64_t __offset) __wur
- __attr_access ((__write_only__, 2, 3));
+ __fortified_attr_access (__write_only__, 2, 3);
/* Write N bytes of BUF to FD at the given position OFFSET without
changing the file pointer. Return the number written, or -1. */
extern ssize_t pwrite64 (int __fd, const void *__buf, size_t __n,
@@ -642,7 +642,7 @@ extern long int sysconf (int __name) __THROW;
#ifdef __USE_POSIX2
/* Get the value of the string-valued system variable NAME. */
extern size_t confstr (int __name, char *__buf, size_t __len) __THROW
- __attr_access ((__write_only__, 2, 3));
+ __fortified_attr_access (__write_only__, 2, 3);
#endif
@@ -709,7 +709,7 @@ extern __gid_t getegid (void) __THROW;
the calling process is in. Otherwise, fill in the group IDs
of its supplementary groups in LIST and return the number written. */
extern int getgroups (int __size, __gid_t __list[]) __THROW __wur
- __attr_access ((__write_only__, 2, 1));
+ __fortified_attr_access (__write_only__, 2, 1);
#ifdef __USE_GNU
/* Return nonzero iff the calling process is in group GID. */
extern int group_member (__gid_t __gid) __THROW;
@@ -801,7 +801,8 @@ extern char *ttyname (int __fd) __THROW;
/* Store at most BUFLEN characters of the pathname of the terminal FD is
open on in BUF. Return 0 on success, otherwise an error number. */
extern int ttyname_r (int __fd, char *__buf, size_t __buflen)
- __THROW __nonnull ((2)) __wur __attr_access ((__write_only__, 2, 3));
+ __THROW __nonnull ((2)) __wur
+ __fortified_attr_access (__write_only__, 2, 3);
/* Return 1 if FD is a valid descriptor associated
with a terminal, zero if not. */
@@ -836,7 +837,8 @@ extern int symlink (const char *__from, const char *__to)
Returns the number of characters read, or -1 for errors. */
extern ssize_t readlink (const char *__restrict __path,
char *__restrict __buf, size_t __len)
- __THROW __nonnull ((1, 2)) __wur __attr_access ((__write_only__, 2, 3));
+ __THROW __nonnull ((1, 2)) __wur
+ __fortified_attr_access (__write_only__, 2, 3);
#endif /* Use POSIX.1-2001. */
@@ -848,7 +850,8 @@ extern int symlinkat (const char *__from, int __tofd,
/* Like readlink but a relative PATH is interpreted relative to FD. */
extern ssize_t readlinkat (int __fd, const char *__restrict __path,
char *__restrict __buf, size_t __len)
- __THROW __nonnull ((2, 3)) __wur __attr_access ((__write_only__, 3, 4));
+ __THROW __nonnull ((2, 3)) __wur
+ __fortified_attr_access (__write_only__, 3, 4);
#endif
/* Remove the link NAME. */
@@ -884,7 +887,7 @@ extern char *getlogin (void);
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int getlogin_r (char *__name, size_t __name_len) __nonnull ((1))
- __attr_access ((__write_only__, 1, 2));
+ __fortified_attr_access (__write_only__, 1, 2);
#endif
#ifdef __USE_MISC
@@ -906,7 +909,7 @@ extern int setlogin (const char *__name) __THROW __nonnull ((1));
The result is null-terminated if LEN is large enough for the full
name and the terminator. */
extern int gethostname (char *__name, size_t __len) __THROW __nonnull ((1))
- __attr_access ((__write_only__, 1, 2));
+ __fortified_attr_access (__write_only__, 1, 2);
#endif
@@ -925,7 +928,8 @@ extern int sethostid (long int __id) __THROW __wur;
Called just like `gethostname' and `sethostname'.
The NIS domain name is usually the empty string when not using NIS. */
extern int getdomainname (char *__name, size_t __len)
- __THROW __nonnull ((1)) __wur __attr_access ((__write_only__, 1, 2));
+ __THROW __nonnull ((1)) __wur
+ __fortified_attr_access (__write_only__, 1, 2);
extern int setdomainname (const char *__name, size_t __len)
__THROW __nonnull ((1)) __wur __attr_access ((__read_only__, 1, 2));
diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
index 0481c12355..74c00eee73 100644
--- a/stdlib/stdlib.h
+++ b/stdlib/stdlib.h
@@ -943,7 +943,8 @@ extern size_t mbstowcs (wchar_t *__restrict __pwcs,
extern size_t wcstombs (char *__restrict __s,
const wchar_t *__restrict __pwcs, size_t __n)
__THROW
- __attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
+ __fortified_attr_access (__write_only__, 1, 3)
+ __attr_access ((__read_only__, 2));
#ifdef __USE_MISC
/* Determine whether the string value of RESPONSE matches the affirmation
@@ -997,7 +998,7 @@ extern char *ptsname (int __fd) __THROW __wur;
terminal associated with the master FD is open on in BUF.
Return 0 on success, otherwise an error number. */
extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
- __THROW __nonnull ((2)) __attr_access ((__write_only__, 2, 3));
+ __THROW __nonnull ((2)) __fortified_attr_access (__write_only__, 2, 3);
/* Open a master pseudo terminal and return its file descriptor. */
extern int getpt (void);
diff --git a/string/bits/string_fortified.h b/string/bits/string_fortified.h
index 67ae2c6b50..5731274848 100644
--- a/string/bits/string_fortified.h
+++ b/string/bits/string_fortified.h
@@ -64,7 +64,7 @@ __NTH (memset (void *__dest, int __ch, size_t __len))
# include <bits/strings_fortified.h>
void __explicit_bzero_chk (void *__dest, size_t __len, size_t __destlen)
- __THROW __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
+ __THROW __nonnull ((1)) __fortified_attr_access (__write_only__, 1, 2);
__fortify_function void
__NTH (explicit_bzero (void *__dest, size_t __len))
@@ -106,7 +106,8 @@ __NTH (stpncpy (char *__dest, const char *__src, size_t __n))
#else
extern char *__stpncpy_chk (char *__dest, const char *__src, size_t __n,
size_t __destlen) __THROW
- __attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
+ __fortified_attr_access ((__write_only__, 1, 3))
+ __attr_access ((__read_only__, 2));
extern char *__REDIRECT_NTH (__stpncpy_alias, (char *__dest, const char *__src,
size_t __n), stpncpy);
diff --git a/string/string.h b/string/string.h
index 04e1b7067d..8dcafb4ac4 100644
--- a/string/string.h
+++ b/string/string.h
@@ -448,7 +448,7 @@ extern char *strerror_l (int __errnum, locale_t __l) __THROW;
/* Set N bytes of S to 0. The compiler will not delete a call to this
function, even if S is dead after the call. */
extern void explicit_bzero (void *__s, size_t __n) __THROW __nonnull ((1))
- __attr_access ((__write_only__, 1, 2));
+ __fortified_attr_access (__write_only__, 1, 2);
/* Return the next DELIM-delimited token from *STRINGP,
terminating it with a '\0', and update *STRINGP to point past it. */
--
2.35.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [committed 2.34 2/8] Make sure that the fortified function conditionals are constant
2022-03-11 15:11 [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 1/8] Don't add access size hints to fortifiable functions Siddhesh Poyarekar
@ 2022-03-11 15:11 ` Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 3/8] debug: Add tests for _FORTIFY_SOURCE=3 Siddhesh Poyarekar
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Siddhesh Poyarekar @ 2022-03-11 15:11 UTC (permalink / raw)
To: libc-stable; +Cc: carlos, fweimer, Adhemerval Zanella
In _FORTIFY_SOURCE=3, the size expression may be non-constant,
resulting in branches in the inline functions remaining intact and
causing a tiny overhead. Clang (and in future, gcc) make sure that
the -1 case is always safe, i.e. any comparison of the generated
expression with (size_t)-1 is always false so that bit is taken care
of. The rest is avoidable since we want the _chk variant whenever we
have a size expression and it's not -1.
Rework the conditionals in a uniform way to clearly indicate two
conditions at compile time:
- Either the size is unknown (-1) or we know at compile time that the
operation length is less than the object size. We can call the
original function in this case. It could be that either the length,
object size or both are non-constant, but the compiler, through
range analysis, is able to fold the *comparison* to a constant.
- The size and length are known and the compiler can see at compile
time that operation length > object size. This is valid grounds for
a warning at compile time, followed by emitting the _chk variant.
For everything else, emit the _chk variant.
This simplifies most of the fortified function implementations and at
the same time, ensures that only one call from _chk or the regular
function is emitted.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit a643f60c53876be0d57b4b7373770e6cb356fd13)
---
io/bits/poll2.h | 27 ++----
libio/bits/stdio2.h | 106 +++++++++-----------
misc/sys/cdefs.h | 47 +++++++++
posix/bits/unistd.h | 174 ++++++++-------------------------
socket/bits/socket2.h | 34 +++----
stdlib/bits/stdlib.h | 57 ++++-------
wcsmbs/bits/wchar2.h | 219 ++++++++++++------------------------------
7 files changed, 226 insertions(+), 438 deletions(-)
diff --git a/io/bits/poll2.h b/io/bits/poll2.h
index be74d020f2..91cdcaf66a 100644
--- a/io/bits/poll2.h
+++ b/io/bits/poll2.h
@@ -36,16 +36,9 @@ extern int __REDIRECT (__poll_chk_warn, (struct pollfd *__fds, nfds_t __nfds,
__fortify_function __fortified_attr_access (__write_only__, 1, 2) int
poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
{
- if (__glibc_objsize (__fds) != (__SIZE_TYPE__) -1)
- {
- if (! __builtin_constant_p (__nfds))
- return __poll_chk (__fds, __nfds, __timeout, __glibc_objsize (__fds));
- else if (__glibc_objsize (__fds) / sizeof (*__fds) < __nfds)
- return __poll_chk_warn (__fds, __nfds, __timeout,
- __glibc_objsize (__fds));
- }
-
- return __poll_alias (__fds, __nfds, __timeout);
+ return __glibc_fortify (poll, __nfds, sizeof (*__fds),
+ __glibc_objsize (__fds),
+ __fds, __nfds, __timeout);
}
@@ -68,17 +61,9 @@ __fortify_function __fortified_attr_access (__write_only__, 1, 2) int
ppoll (struct pollfd *__fds, nfds_t __nfds, const struct timespec *__timeout,
const __sigset_t *__ss)
{
- if (__glibc_objsize (__fds) != (__SIZE_TYPE__) -1)
- {
- if (! __builtin_constant_p (__nfds))
- return __ppoll_chk (__fds, __nfds, __timeout, __ss,
- __glibc_objsize (__fds));
- else if (__glibc_objsize (__fds) / sizeof (*__fds) < __nfds)
- return __ppoll_chk_warn (__fds, __nfds, __timeout, __ss,
- __glibc_objsize (__fds));
- }
-
- return __ppoll_alias (__fds, __nfds, __timeout, __ss);
+ return __glibc_fortify (ppoll, __nfds, sizeof (*__fds),
+ __glibc_objsize (__fds),
+ __fds, __nfds, __timeout, __ss);
}
#endif
diff --git a/libio/bits/stdio2.h b/libio/bits/stdio2.h
index 4f016a5638..40ff16b01b 100644
--- a/libio/bits/stdio2.h
+++ b/libio/bits/stdio2.h
@@ -261,15 +261,12 @@ extern char *__REDIRECT (__fgets_chk_warn,
__fortify_function __wur __fortified_attr_access (__write_only__, 1, 2) char *
fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
{
- if (__glibc_objsize (__s) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n) || __n <= 0)
- return __fgets_chk (__s, __glibc_objsize (__s), __n, __stream);
-
- if ((size_t) __n > __glibc_objsize (__s))
- return __fgets_chk_warn (__s, __glibc_objsize (__s), __n, __stream);
- }
- return __fgets_alias (__s, __n, __stream);
+ size_t sz = __glibc_objsize (__s);
+ if (__glibc_safe_or_unknown_len (__n, sizeof (char), sz))
+ return __fgets_alias (__s, __n, __stream);
+ if (__glibc_unsafe_len (__n, sizeof (char), sz))
+ return __fgets_chk_warn (__s, sz, __n, __stream);
+ return __fgets_chk (__s, sz, __n, __stream);
}
extern size_t __fread_chk (void *__restrict __ptr, size_t __ptrlen,
@@ -291,19 +288,12 @@ __fortify_function __wur size_t
fread (void *__restrict __ptr, size_t __size, size_t __n,
FILE *__restrict __stream)
{
- if (__glibc_objsize0 (__ptr) != (size_t) -1)
- {
- if (!__builtin_constant_p (__size)
- || !__builtin_constant_p (__n)
- || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
- return __fread_chk (__ptr, __glibc_objsize0 (__ptr), __size, __n,
- __stream);
-
- if (__size * __n > __glibc_objsize0 (__ptr))
- return __fread_chk_warn (__ptr, __glibc_objsize0 (__ptr), __size, __n,
- __stream);
- }
- return __fread_alias (__ptr, __size, __n, __stream);
+ size_t sz = __glibc_objsize0 (__ptr);
+ if (__glibc_safe_or_unknown_len (__n, __size, sz))
+ return __fread_alias (__ptr, __size, __n, __stream);
+ if (__glibc_unsafe_len (__n, __size, sz))
+ return __fread_chk_warn (__ptr, sz, __size, __n, __stream);
+ return __fread_chk (__ptr, sz, __size, __n, __stream);
}
#ifdef __USE_GNU
@@ -323,17 +313,12 @@ extern char *__REDIRECT (__fgets_unlocked_chk_warn,
__fortify_function __wur __fortified_attr_access (__write_only__, 1, 2) char *
fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream)
{
- if (__glibc_objsize (__s) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n) || __n <= 0)
- return __fgets_unlocked_chk (__s, __glibc_objsize (__s), __n,
- __stream);
-
- if ((size_t) __n > __glibc_objsize (__s))
- return __fgets_unlocked_chk_warn (__s, __glibc_objsize (__s), __n,
- __stream);
- }
- return __fgets_unlocked_alias (__s, __n, __stream);
+ size_t sz = __glibc_objsize (__s);
+ if (__glibc_safe_or_unknown_len (__n, sizeof (char), sz))
+ return __fgets_unlocked_alias (__s, __n, __stream);
+ if (__glibc_unsafe_len (__n, sizeof (char), sz))
+ return __fgets_unlocked_chk_warn (__s, sz, __n, __stream);
+ return __fgets_unlocked_chk (__s, sz, __n, __stream);
}
#endif
@@ -358,41 +343,36 @@ __fortify_function __wur size_t
fread_unlocked (void *__restrict __ptr, size_t __size, size_t __n,
FILE *__restrict __stream)
{
- if (__glibc_objsize0 (__ptr) != (size_t) -1)
+ size_t sz = __glibc_objsize0 (__ptr);
+ if (__glibc_safe_or_unknown_len (__n, __size, sz))
{
- if (!__builtin_constant_p (__size)
- || !__builtin_constant_p (__n)
- || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
- return __fread_unlocked_chk (__ptr, __glibc_objsize0 (__ptr), __size,
- __n, __stream);
-
- if (__size * __n > __glibc_objsize0 (__ptr))
- return __fread_unlocked_chk_warn (__ptr, __glibc_objsize0 (__ptr),
- __size, __n, __stream);
- }
-
# ifdef __USE_EXTERN_INLINES
- if (__builtin_constant_p (__size)
- && __builtin_constant_p (__n)
- && (__size | __n) < (((size_t) 1) << (8 * sizeof (size_t) / 2))
- && __size * __n <= 8)
- {
- size_t __cnt = __size * __n;
- char *__cptr = (char *) __ptr;
- if (__cnt == 0)
- return 0;
-
- for (; __cnt > 0; --__cnt)
+ if (__builtin_constant_p (__size)
+ && __builtin_constant_p (__n)
+ && (__size | __n) < (((size_t) 1) << (8 * sizeof (size_t) / 2))
+ && __size * __n <= 8)
{
- int __c = getc_unlocked (__stream);
- if (__c == EOF)
- break;
- *__cptr++ = __c;
+ size_t __cnt = __size * __n;
+ char *__cptr = (char *) __ptr;
+ if (__cnt == 0)
+ return 0;
+
+ for (; __cnt > 0; --__cnt)
+ {
+ int __c = getc_unlocked (__stream);
+ if (__c == EOF)
+ break;
+ *__cptr++ = __c;
+ }
+ return (__cptr - (char *) __ptr) / __size;
}
- return (__cptr - (char *) __ptr) / __size;
- }
# endif
- return __fread_unlocked_alias (__ptr, __size, __n, __stream);
+ return __fread_unlocked_alias (__ptr, __size, __n, __stream);
+ }
+ if (__glibc_unsafe_len (__n, __size, sz))
+ return __fread_unlocked_chk_warn (__ptr, sz, __size, __n, __stream);
+ return __fread_unlocked_chk (__ptr, sz, __size, __n, __stream);
+
}
#endif
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index cd836441a9..4825ff0351 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -150,6 +150,53 @@
# define __glibc_objsize(__o) __bos (__o)
#endif
+/* Compile time conditions to choose between the regular, _chk and _chk_warn
+ variants. These conditions should get evaluated to constant and optimized
+ away. */
+
+#define __glibc_safe_len_cond(__l, __s, __osz) ((__l) <= (__osz) / (__s))
+#define __glibc_unsigned_or_positive(__l) \
+ ((__typeof (__l)) 0 < (__typeof (__l)) -1 \
+ || (__builtin_constant_p (__l) && (__l) > 0))
+
+/* Length is known to be safe at compile time if the __L * __S <= __OBJSZ
+ condition can be folded to a constant and if it is true. The -1 check is
+ redundant because since it implies that __glibc_safe_len_cond is true. */
+#define __glibc_safe_or_unknown_len(__l, __s, __osz) \
+ (__glibc_unsigned_or_positive (__l) \
+ && __builtin_constant_p (__glibc_safe_len_cond ((__SIZE_TYPE__) (__l), \
+ __s, __osz)) \
+ && __glibc_safe_len_cond ((__SIZE_TYPE__) (__l), __s, __osz))
+
+/* Conversely, we know at compile time that the length is safe if the
+ __L * __S <= __OBJSZ condition can be folded to a constant and if it is
+ false. */
+#define __glibc_unsafe_len(__l, __s, __osz) \
+ (__glibc_unsigned_or_positive (__l) \
+ && __builtin_constant_p (__glibc_safe_len_cond ((__SIZE_TYPE__) (__l), \
+ __s, __osz)) \
+ && !__glibc_safe_len_cond ((__SIZE_TYPE__) (__l), __s, __osz))
+
+/* Fortify function f. __f_alias, __f_chk and __f_chk_warn must be
+ declared. */
+
+#define __glibc_fortify(f, __l, __s, __osz, ...) \
+ (__glibc_safe_or_unknown_len (__l, __s, __osz) \
+ ? __ ## f ## _alias (__VA_ARGS__) \
+ : (__glibc_unsafe_len (__l, __s, __osz) \
+ ? __ ## f ## _chk_warn (__VA_ARGS__, __osz) \
+ : __ ## f ## _chk (__VA_ARGS__, __osz))) \
+
+/* Fortify function f, where object size argument passed to f is the number of
+ elements and not total size. */
+
+#define __glibc_fortify_n(f, __l, __s, __osz, ...) \
+ (__glibc_safe_or_unknown_len (__l, __s, __osz) \
+ ? __ ## f ## _alias (__VA_ARGS__) \
+ : (__glibc_unsafe_len (__l, __s, __osz) \
+ ? __ ## f ## _chk_warn (__VA_ARGS__, (__osz) / (__s)) \
+ : __ ## f ## _chk (__VA_ARGS__, (__osz) / (__s)))) \
+
#if __GNUC_PREREQ (4,3)
# define __warnattr(msg) __attribute__((__warning__ (msg)))
# define __errordecl(name, msg) \
diff --git a/posix/bits/unistd.h b/posix/bits/unistd.h
index 622adeb2b2..697dcbbf7b 100644
--- a/posix/bits/unistd.h
+++ b/posix/bits/unistd.h
@@ -35,16 +35,9 @@ extern ssize_t __REDIRECT (__read_chk_warn,
__fortify_function __wur ssize_t
read (int __fd, void *__buf, size_t __nbytes)
{
- if (__glibc_objsize0 (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__nbytes))
- return __read_chk (__fd, __buf, __nbytes, __glibc_objsize0 (__buf));
-
- if (__nbytes > __glibc_objsize0 (__buf))
- return __read_chk_warn (__fd, __buf, __nbytes,
- __glibc_objsize0 (__buf));
- }
- return __read_alias (__fd, __buf, __nbytes);
+ return __glibc_fortify (read, __nbytes, sizeof (char),
+ __glibc_objsize0 (__buf),
+ __fd, __buf, __nbytes);
}
#ifdef __USE_UNIX98
@@ -78,34 +71,17 @@ extern ssize_t __REDIRECT (__pread64_chk_warn,
__fortify_function __wur ssize_t
pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
{
- if (__glibc_objsize0 (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__nbytes))
- return __pread_chk (__fd, __buf, __nbytes, __offset,
- __glibc_objsize0 (__buf));
-
- if ( __nbytes > __glibc_objsize0 (__buf))
- return __pread_chk_warn (__fd, __buf, __nbytes, __offset,
- __glibc_objsize0 (__buf));
- }
- return __pread_alias (__fd, __buf, __nbytes, __offset);
+ return __glibc_fortify (pread, __nbytes, sizeof (char),
+ __glibc_objsize0 (__buf),
+ __fd, __buf, __nbytes, __offset);
}
# else
__fortify_function __wur ssize_t
pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
{
- if (__glibc_objsize0 (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__nbytes))
- return __pread64_chk (__fd, __buf, __nbytes, __offset,
- __glibc_objsize0 (__buf));
-
- if ( __nbytes > __glibc_objsize0 (__buf))
- return __pread64_chk_warn (__fd, __buf, __nbytes, __offset,
- __glibc_objsize0 (__buf));
- }
-
- return __pread64_alias (__fd, __buf, __nbytes, __offset);
+ return __glibc_fortify (pread64, __nbytes, sizeof (char),
+ __glibc_objsize0 (__buf),
+ __fd, __buf, __nbytes, __offset);
}
# endif
@@ -113,18 +89,9 @@ pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
__fortify_function __wur ssize_t
pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
{
- if (__glibc_objsize0 (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__nbytes))
- return __pread64_chk (__fd, __buf, __nbytes, __offset,
- __glibc_objsize0 (__buf));
-
- if ( __nbytes > __glibc_objsize0 (__buf))
- return __pread64_chk_warn (__fd, __buf, __nbytes, __offset,
- __glibc_objsize0 (__buf));
- }
-
- return __pread64_alias (__fd, __buf, __nbytes, __offset);
+ return __glibc_fortify (pread64, __nbytes, sizeof (char),
+ __glibc_objsize0 (__buf),
+ __fd, __buf, __nbytes, __offset);
}
# endif
#endif
@@ -149,16 +116,9 @@ __fortify_function __nonnull ((1, 2)) __wur ssize_t
__NTH (readlink (const char *__restrict __path, char *__restrict __buf,
size_t __len))
{
- if (__glibc_objsize (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__len))
- return __readlink_chk (__path, __buf, __len, __glibc_objsize (__buf));
-
- if ( __len > __glibc_objsize (__buf))
- return __readlink_chk_warn (__path, __buf, __len,
- __glibc_objsize (__buf));
- }
- return __readlink_alias (__path, __buf, __len);
+ return __glibc_fortify (readlink, __len, sizeof (char),
+ __glibc_objsize (__buf),
+ __path, __buf, __len);
}
#endif
@@ -184,17 +144,9 @@ __fortify_function __nonnull ((2, 3)) __wur ssize_t
__NTH (readlinkat (int __fd, const char *__restrict __path,
char *__restrict __buf, size_t __len))
{
- if (__glibc_objsize (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__len))
- return __readlinkat_chk (__fd, __path, __buf, __len,
- __glibc_objsize (__buf));
-
- if (__len > __glibc_objsize (__buf))
- return __readlinkat_chk_warn (__fd, __path, __buf, __len,
- __glibc_objsize (__buf));
- }
- return __readlinkat_alias (__fd, __path, __buf, __len);
+ return __glibc_fortify (readlinkat, __len, sizeof (char),
+ __glibc_objsize (__buf),
+ __fd, __path, __buf, __len);
}
#endif
@@ -211,15 +163,9 @@ extern char *__REDIRECT_NTH (__getcwd_chk_warn,
__fortify_function __wur char *
__NTH (getcwd (char *__buf, size_t __size))
{
- if (__glibc_objsize (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__size))
- return __getcwd_chk (__buf, __size, __glibc_objsize (__buf));
-
- if (__size > __glibc_objsize (__buf))
- return __getcwd_chk_warn (__buf, __size, __glibc_objsize (__buf));
- }
- return __getcwd_alias (__buf, __size);
+ return __glibc_fortify (getcwd, __size, sizeof (char),
+ __glibc_objsize (__buf),
+ __buf, __size);
}
#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
@@ -253,16 +199,9 @@ extern size_t __REDIRECT_NTH (__confstr_chk_warn,
__fortify_function size_t
__NTH (confstr (int __name, char *__buf, size_t __len))
{
- if (__glibc_objsize (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__len))
- return __confstr_chk (__name, __buf, __len, __glibc_objsize (__buf));
-
- if (__glibc_objsize (__buf) < __len)
- return __confstr_chk_warn (__name, __buf, __len,
- __glibc_objsize (__buf));
- }
- return __confstr_alias (__name, __buf, __len);
+ return __glibc_fortify (confstr, __len, sizeof (char),
+ __glibc_objsize (__buf),
+ __name, __buf, __len);
}
@@ -279,15 +218,9 @@ extern int __REDIRECT_NTH (__getgroups_chk_warn,
__fortify_function int
__NTH (getgroups (int __size, __gid_t __list[]))
{
- if (__glibc_objsize (__list) != (size_t) -1)
- {
- if (!__builtin_constant_p (__size) || __size < 0)
- return __getgroups_chk (__size, __list, __glibc_objsize (__list));
-
- if (__size * sizeof (__gid_t) > __glibc_objsize (__list))
- return __getgroups_chk_warn (__size, __list, __glibc_objsize (__list));
- }
- return __getgroups_alias (__size, __list);
+ return __glibc_fortify (getgroups, __size, sizeof (__gid_t),
+ __glibc_objsize (__list),
+ __size, __list);
}
@@ -306,17 +239,9 @@ extern int __REDIRECT_NTH (__ttyname_r_chk_warn,
__fortify_function int
__NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
{
- if (__glibc_objsize (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__buflen))
- return __ttyname_r_chk (__fd, __buf, __buflen,
- __glibc_objsize (__buf));
-
- if (__buflen > __glibc_objsize (__buf))
- return __ttyname_r_chk_warn (__fd, __buf, __buflen,
- __glibc_objsize (__buf));
- }
- return __ttyname_r_alias (__fd, __buf, __buflen);
+ return __glibc_fortify (ttyname_r, __buflen, sizeof (char),
+ __glibc_objsize (__buf),
+ __fd, __buf, __buflen);
}
@@ -334,16 +259,9 @@ extern int __REDIRECT (__getlogin_r_chk_warn,
__fortify_function int
getlogin_r (char *__buf, size_t __buflen)
{
- if (__glibc_objsize (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__buflen))
- return __getlogin_r_chk (__buf, __buflen, __glibc_objsize (__buf));
-
- if (__buflen > __glibc_objsize (__buf))
- return __getlogin_r_chk_warn (__buf, __buflen,
- __glibc_objsize (__buf));
- }
- return __getlogin_r_alias (__buf, __buflen);
+ return __glibc_fortify (getlogin_r, __buflen, sizeof (char),
+ __glibc_objsize (__buf),
+ __buf, __buflen);
}
#endif
@@ -363,16 +281,9 @@ extern int __REDIRECT_NTH (__gethostname_chk_warn,
__fortify_function int
__NTH (gethostname (char *__buf, size_t __buflen))
{
- if (__glibc_objsize (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__buflen))
- return __gethostname_chk (__buf, __buflen, __glibc_objsize (__buf));
-
- if (__buflen > __glibc_objsize (__buf))
- return __gethostname_chk_warn (__buf, __buflen,
- __glibc_objsize (__buf));
- }
- return __gethostname_alias (__buf, __buflen);
+ return __glibc_fortify (gethostname, __buflen, sizeof (char),
+ __glibc_objsize (__buf),
+ __buf, __buflen);
}
#endif
@@ -394,15 +305,8 @@ extern int __REDIRECT_NTH (__getdomainname_chk_warn,
__fortify_function int
__NTH (getdomainname (char *__buf, size_t __buflen))
{
- if (__glibc_objsize (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__buflen))
- return __getdomainname_chk (__buf, __buflen, __glibc_objsize (__buf));
-
- if (__buflen > __glibc_objsize (__buf))
- return __getdomainname_chk_warn (__buf, __buflen,
- __glibc_objsize (__buf));
- }
- return __getdomainname_alias (__buf, __buflen);
+ return __glibc_fortify (getdomainname, __buflen, sizeof (char),
+ __glibc_objsize (__buf),
+ __buf, __buflen);
}
#endif
diff --git a/socket/bits/socket2.h b/socket/bits/socket2.h
index 9c8ac69624..b28cde55f3 100644
--- a/socket/bits/socket2.h
+++ b/socket/bits/socket2.h
@@ -33,17 +33,12 @@ extern ssize_t __REDIRECT (__recv_chk_warn,
__fortify_function ssize_t
recv (int __fd, void *__buf, size_t __n, int __flags)
{
- if (__glibc_objsize0 (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n))
- return __recv_chk (__fd, __buf, __n, __glibc_objsize0 (__buf),
- __flags);
-
- if (__n > __glibc_objsize0 (__buf))
- return __recv_chk_warn (__fd, __buf, __n, __glibc_objsize0 (__buf),
- __flags);
- }
- return __recv_alias (__fd, __buf, __n, __flags);
+ size_t sz = __glibc_objsize0 (__buf);
+ if (__glibc_safe_or_unknown_len (__n, sizeof (char), sz))
+ return __recv_alias (__fd, __buf, __n, __flags);
+ if (__glibc_unsafe_len (__n, sizeof (char), sz))
+ return __recv_chk_warn (__fd, __buf, __n, sz, __flags);
+ return __recv_chk (__fd, __buf, __n, sz, __flags);
}
extern ssize_t __recvfrom_chk (int __fd, void *__restrict __buf, size_t __n,
@@ -66,14 +61,11 @@ __fortify_function ssize_t
recvfrom (int __fd, void *__restrict __buf, size_t __n, int __flags,
__SOCKADDR_ARG __addr, socklen_t *__restrict __addr_len)
{
- if (__glibc_objsize0 (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n))
- return __recvfrom_chk (__fd, __buf, __n, __glibc_objsize0 (__buf),
- __flags, __addr, __addr_len);
- if (__n > __glibc_objsize0 (__buf))
- return __recvfrom_chk_warn (__fd, __buf, __n, __glibc_objsize0 (__buf),
- __flags, __addr, __addr_len);
- }
- return __recvfrom_alias (__fd, __buf, __n, __flags, __addr, __addr_len);
+ size_t sz = __glibc_objsize0 (__buf);
+ if (__glibc_safe_or_unknown_len (__n, sizeof (char), sz))
+ return __recvfrom_alias (__fd, __buf, __n, __flags, __addr, __addr_len);
+ if (__glibc_unsafe_len (__n, sizeof (char), sz))
+ return __recvfrom_chk_warn (__fd, __buf, __n, sz, __flags, __addr,
+ __addr_len);
+ return __recvfrom_chk (__fd, __buf, __n, sz, __flags, __addr, __addr_len);
}
diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h
index eae31b38f0..067115eeca 100644
--- a/stdlib/bits/stdlib.h
+++ b/stdlib/bits/stdlib.h
@@ -36,17 +36,16 @@ extern char *__REDIRECT_NTH (__realpath_chk_warn,
__fortify_function __wur char *
__NTH (realpath (const char *__restrict __name, char *__restrict __resolved))
{
- if (__glibc_objsize (__resolved) != (size_t) -1)
- {
+ size_t sz = __glibc_objsize (__resolved);
+
+ if (sz == (size_t) -1)
+ return __realpath_alias (__name, __resolved);
+
#if defined _LIBC_LIMITS_H_ && defined PATH_MAX
- if (__glibc_objsize (__resolved) < PATH_MAX)
- return __realpath_chk_warn (__name, __resolved,
- __glibc_objsize (__resolved));
+ if (__glibc_unsafe_len (sz, sizeof (char), PATH_MAX))
+ return __realpath_chk_warn (__name, __resolved, sz);
#endif
- return __realpath_chk (__name, __resolved, __glibc_objsize (__resolved));
- }
-
- return __realpath_alias (__name, __resolved);
+ return __realpath_chk (__name, __resolved, sz);
}
@@ -65,16 +64,9 @@ extern int __REDIRECT_NTH (__ptsname_r_chk_warn,
__fortify_function int
__NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
{
- if (__glibc_objsize (__buf) != (size_t) -1)
- {
- if (!__builtin_constant_p (__buflen))
- return __ptsname_r_chk (__fd, __buf, __buflen,
- __glibc_objsize (__buf));
- if (__buflen > __glibc_objsize (__buf))
- return __ptsname_r_chk_warn (__fd, __buf, __buflen,
- __glibc_objsize (__buf));
- }
- return __ptsname_r_alias (__fd, __buf, __buflen);
+ return __glibc_fortify (ptsname_r, __buflen, sizeof (char),
+ __glibc_objsize (__buf),
+ __fd, __buf, __buflen);
}
@@ -120,18 +112,9 @@ __fortify_function size_t
__NTH (mbstowcs (wchar_t *__restrict __dst, const char *__restrict __src,
size_t __len))
{
- if (__glibc_objsize (__dst) != (size_t) -1)
- {
- if (!__builtin_constant_p (__len))
- return __mbstowcs_chk (__dst, __src, __len,
- __glibc_objsize (__dst) / sizeof (wchar_t));
-
- if (__len > __glibc_objsize (__dst) / sizeof (wchar_t))
- return __mbstowcs_chk_warn (__dst, __src, __len,
- (__glibc_objsize (__dst)
- / sizeof (wchar_t)));
- }
- return __mbstowcs_alias (__dst, __src, __len);
+ return __glibc_fortify_n (mbstowcs, __len, sizeof (wchar_t),
+ __glibc_objsize (__dst),
+ __dst, __src, __len);
}
@@ -154,13 +137,7 @@ __fortify_function size_t
__NTH (wcstombs (char *__restrict __dst, const wchar_t *__restrict __src,
size_t __len))
{
- if (__glibc_objsize (__dst) != (size_t) -1)
- {
- if (!__builtin_constant_p (__len))
- return __wcstombs_chk (__dst, __src, __len, __glibc_objsize (__dst));
- if (__len > __glibc_objsize (__dst))
- return __wcstombs_chk_warn (__dst, __src, __len,
- __glibc_objsize (__dst));
- }
- return __wcstombs_alias (__dst, __src, __len);
+ return __glibc_fortify (wcstombs, __len, sizeof (char),
+ __glibc_objsize (__dst),
+ __dst, __src, __len);
}
diff --git a/wcsmbs/bits/wchar2.h b/wcsmbs/bits/wchar2.h
index ea2518dc72..26012ef936 100644
--- a/wcsmbs/bits/wchar2.h
+++ b/wcsmbs/bits/wchar2.h
@@ -39,17 +39,9 @@ __fortify_function wchar_t *
__NTH (wmemcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
size_t __n))
{
- if (__glibc_objsize0 (__s1) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n))
- return __wmemcpy_chk (__s1, __s2, __n,
- __glibc_objsize0 (__s1) / sizeof (wchar_t));
-
- if (__n > __glibc_objsize0 (__s1) / sizeof (wchar_t))
- return __wmemcpy_chk_warn (__s1, __s2, __n,
- __glibc_objsize0 (__s1) / sizeof (wchar_t));
- }
- return __wmemcpy_alias (__s1, __s2, __n);
+ return __glibc_fortify_n (wmemcpy, __n, sizeof (wchar_t),
+ __glibc_objsize0 (__s1),
+ __s1, __s2, __n);
}
@@ -67,18 +59,9 @@ extern wchar_t *__REDIRECT_NTH (__wmemmove_chk_warn,
__fortify_function wchar_t *
__NTH (wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n))
{
- if (__glibc_objsize0 (__s1) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n))
- return __wmemmove_chk (__s1, __s2, __n,
- __glibc_objsize0 (__s1) / sizeof (wchar_t));
-
- if (__n > __glibc_objsize0 (__s1) / sizeof (wchar_t))
- return __wmemmove_chk_warn (__s1, __s2, __n,
- (__glibc_objsize0 (__s1)
- / sizeof (wchar_t)));
- }
- return __wmemmove_alias (__s1, __s2, __n);
+ return __glibc_fortify_n (wmemmove, __n, sizeof (wchar_t),
+ __glibc_objsize0 (__s1),
+ __s1, __s2, __n);
}
@@ -101,18 +84,9 @@ __fortify_function wchar_t *
__NTH (wmempcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
size_t __n))
{
- if (__glibc_objsize0 (__s1) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n))
- return __wmempcpy_chk (__s1, __s2, __n,
- __glibc_objsize0 (__s1) / sizeof (wchar_t));
-
- if (__n > __glibc_objsize0 (__s1) / sizeof (wchar_t))
- return __wmempcpy_chk_warn (__s1, __s2, __n,
- (__glibc_objsize0 (__s1)
- / sizeof (wchar_t)));
- }
- return __wmempcpy_alias (__s1, __s2, __n);
+ return __glibc_fortify_n (wmempcpy, __n, sizeof (wchar_t),
+ __glibc_objsize0 (__s1),
+ __s1, __s2, __n);
}
#endif
@@ -130,17 +104,9 @@ extern wchar_t *__REDIRECT_NTH (__wmemset_chk_warn,
__fortify_function wchar_t *
__NTH (wmemset (wchar_t *__s, wchar_t __c, size_t __n))
{
- if (__glibc_objsize0 (__s) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n))
- return __wmemset_chk (__s, __c, __n,
- __glibc_objsize0 (__s) / sizeof (wchar_t));
-
- if (__n > __glibc_objsize0 (__s) / sizeof (wchar_t))
- return __wmemset_chk_warn (__s, __c, __n,
- __glibc_objsize0 (__s) / sizeof (wchar_t));
- }
- return __wmemset_alias (__s, __c, __n);
+ return __glibc_fortify_n (wmemset, __n, sizeof (wchar_t),
+ __glibc_objsize0 (__s),
+ __s, __c, __n);
}
@@ -154,9 +120,9 @@ extern wchar_t *__REDIRECT_NTH (__wcscpy_alias,
__fortify_function wchar_t *
__NTH (wcscpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
{
- if (__glibc_objsize (__dest) != (size_t) -1)
- return __wcscpy_chk (__dest, __src,
- __glibc_objsize (__dest) / sizeof (wchar_t));
+ size_t sz = __glibc_objsize (__dest);
+ if (sz != (size_t) -1)
+ return __wcscpy_chk (__dest, __src, sz / sizeof (wchar_t));
return __wcscpy_alias (__dest, __src);
}
@@ -171,9 +137,9 @@ extern wchar_t *__REDIRECT_NTH (__wcpcpy_alias,
__fortify_function wchar_t *
__NTH (wcpcpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
{
- if (__glibc_objsize (__dest) != (size_t) -1)
- return __wcpcpy_chk (__dest, __src,
- __glibc_objsize (__dest) / sizeof (wchar_t));
+ size_t sz = __glibc_objsize (__dest);
+ if (sz != (size_t) -1)
+ return __wcpcpy_chk (__dest, __src, sz / sizeof (wchar_t));
return __wcpcpy_alias (__dest, __src);
}
@@ -196,17 +162,9 @@ __fortify_function wchar_t *
__NTH (wcsncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
size_t __n))
{
- if (__glibc_objsize (__dest) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n))
- return __wcsncpy_chk (__dest, __src, __n,
- __glibc_objsize (__dest) / sizeof (wchar_t));
- if (__n > __glibc_objsize (__dest) / sizeof (wchar_t))
- return __wcsncpy_chk_warn (__dest, __src, __n,
- (__glibc_objsize (__dest)
- / sizeof (wchar_t)));
- }
- return __wcsncpy_alias (__dest, __src, __n);
+ return __glibc_fortify_n (wcsncpy, __n, sizeof (wchar_t),
+ __glibc_objsize (__dest),
+ __dest, __src, __n);
}
@@ -228,17 +186,9 @@ __fortify_function wchar_t *
__NTH (wcpncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
size_t __n))
{
- if (__glibc_objsize (__dest) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n))
- return __wcpncpy_chk (__dest, __src, __n,
- __glibc_objsize (__dest) / sizeof (wchar_t));
- if (__n > __glibc_objsize (__dest) / sizeof (wchar_t))
- return __wcpncpy_chk_warn (__dest, __src, __n,
- (__glibc_objsize (__dest)
- / sizeof (wchar_t)));
- }
- return __wcpncpy_alias (__dest, __src, __n);
+ return __glibc_fortify_n (wcpncpy, __n, sizeof (wchar_t),
+ __glibc_objsize (__dest),
+ __dest, __src, __n);
}
@@ -252,9 +202,9 @@ extern wchar_t *__REDIRECT_NTH (__wcscat_alias,
__fortify_function wchar_t *
__NTH (wcscat (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
{
- if (__glibc_objsize (__dest) != (size_t) -1)
- return __wcscat_chk (__dest, __src,
- __glibc_objsize (__dest) / sizeof (wchar_t));
+ size_t sz = __glibc_objsize (__dest);
+ if (sz != (size_t) -1)
+ return __wcscat_chk (__dest, __src, sz / sizeof (wchar_t));
return __wcscat_alias (__dest, __src);
}
@@ -271,9 +221,9 @@ __fortify_function wchar_t *
__NTH (wcsncat (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
size_t __n))
{
- if (__glibc_objsize (__dest) != (size_t) -1)
- return __wcsncat_chk (__dest, __src, __n,
- __glibc_objsize (__dest) / sizeof (wchar_t));
+ size_t sz = __glibc_objsize (__dest);
+ if (sz != (size_t) -1)
+ return __wcsncat_chk (__dest, __src, __n, sz / sizeof (wchar_t));
return __wcsncat_alias (__dest, __src, __n);
}
@@ -293,10 +243,10 @@ __fortify_function int
__NTH (swprintf (wchar_t *__restrict __s, size_t __n,
const wchar_t *__restrict __fmt, ...))
{
- if (__glibc_objsize (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
+ size_t sz = __glibc_objsize (__s);
+ if (sz != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
return __swprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
- __glibc_objsize (__s) / sizeof (wchar_t),
- __fmt, __va_arg_pack ());
+ sz / sizeof (wchar_t), __fmt, __va_arg_pack ());
return __swprintf_alias (__s, __n, __fmt, __va_arg_pack ());
}
#elif !defined __cplusplus
@@ -323,10 +273,10 @@ __fortify_function int
__NTH (vswprintf (wchar_t *__restrict __s, size_t __n,
const wchar_t *__restrict __fmt, __gnuc_va_list __ap))
{
- if (__glibc_objsize (__s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
+ size_t sz = __glibc_objsize (__s);
+ if (sz != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
return __vswprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
- __glibc_objsize (__s) / sizeof (wchar_t), __fmt,
- __ap);
+ sz / sizeof (wchar_t), __fmt, __ap);
return __vswprintf_alias (__s, __n, __fmt, __ap);
}
@@ -392,18 +342,12 @@ extern wchar_t *__REDIRECT (__fgetws_chk_warn,
__fortify_function __wur wchar_t *
fgetws (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
{
- if (__glibc_objsize (__s) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n) || __n <= 0)
- return __fgetws_chk (__s, __glibc_objsize (__s) / sizeof (wchar_t),
- __n, __stream);
-
- if ((size_t) __n > __glibc_objsize (__s) / sizeof (wchar_t))
- return __fgetws_chk_warn (__s,
- __glibc_objsize (__s) / sizeof (wchar_t),
- __n, __stream);
- }
- return __fgetws_alias (__s, __n, __stream);
+ size_t sz = __glibc_objsize (__s);
+ if (__glibc_safe_or_unknown_len (__n, sizeof (wchar_t), sz))
+ return __fgetws_alias (__s, __n, __stream);
+ if (__glibc_unsafe_len (__n, sizeof (wchar_t), sz))
+ return __fgetws_chk_warn (__s, sz / sizeof (wchar_t), __n, __stream);
+ return __fgetws_chk (__s, sz / sizeof (wchar_t), __n, __stream);
}
#ifdef __USE_GNU
@@ -424,20 +368,13 @@ extern wchar_t *__REDIRECT (__fgetws_unlocked_chk_warn,
__fortify_function __wur wchar_t *
fgetws_unlocked (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
{
- if (__glibc_objsize (__s) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n) || __n <= 0)
- return __fgetws_unlocked_chk (__s,
- __glibc_objsize (__s) / sizeof (wchar_t),
- __n, __stream);
-
- if ((size_t) __n > __glibc_objsize (__s) / sizeof (wchar_t))
- return __fgetws_unlocked_chk_warn (__s,
- (__glibc_objsize (__s)
- / sizeof (wchar_t)),
- __n, __stream);
- }
- return __fgetws_unlocked_alias (__s, __n, __stream);
+ size_t sz = __glibc_objsize (__s);
+ if (__glibc_safe_or_unknown_len (__n, sizeof (wchar_t), sz))
+ return __fgetws_unlocked_alias (__s, __n, __stream);
+ if (__glibc_unsafe_len (__n, sizeof (wchar_t), sz))
+ return __fgetws_unlocked_chk_warn (__s, sz / sizeof (wchar_t), __n,
+ __stream);
+ return __fgetws_unlocked_chk (__s, sz / sizeof (wchar_t), __n, __stream);
}
#endif
@@ -488,18 +425,9 @@ __fortify_function size_t
__NTH (mbsrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
size_t __len, mbstate_t *__restrict __ps))
{
- if (__glibc_objsize (__dst) != (size_t) -1)
- {
- if (!__builtin_constant_p (__len))
- return __mbsrtowcs_chk (__dst, __src, __len, __ps,
- __glibc_objsize (__dst) / sizeof (wchar_t));
-
- if (__len > __glibc_objsize (__dst) / sizeof (wchar_t))
- return __mbsrtowcs_chk_warn (__dst, __src, __len, __ps,
- (__glibc_objsize (__dst)
- / sizeof (wchar_t)));
- }
- return __mbsrtowcs_alias (__dst, __src, __len, __ps);
+ return __glibc_fortify_n (mbsrtowcs, __len, sizeof (wchar_t),
+ __glibc_objsize (__dst),
+ __dst, __src, __len, __ps);
}
@@ -523,17 +451,9 @@ __fortify_function size_t
__NTH (wcsrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
size_t __len, mbstate_t *__restrict __ps))
{
- if (__glibc_objsize (__dst) != (size_t) -1)
- {
- if (!__builtin_constant_p (__len))
- return __wcsrtombs_chk (__dst, __src, __len, __ps,
- __glibc_objsize (__dst));
-
- if (__len > __glibc_objsize (__dst))
- return __wcsrtombs_chk_warn (__dst, __src, __len, __ps,
- __glibc_objsize (__dst));
- }
- return __wcsrtombs_alias (__dst, __src, __len, __ps);
+ return __glibc_fortify (wcsrtombs, __len, sizeof (char),
+ __glibc_objsize (__dst),
+ __dst, __src, __len, __ps);
}
@@ -559,18 +479,9 @@ __fortify_function size_t
__NTH (mbsnrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
size_t __nmc, size_t __len, mbstate_t *__restrict __ps))
{
- if (__glibc_objsize (__dst) != (size_t) -1)
- {
- if (!__builtin_constant_p (__len))
- return __mbsnrtowcs_chk (__dst, __src, __nmc, __len, __ps,
- __glibc_objsize (__dst) / sizeof (wchar_t));
-
- if (__len > __glibc_objsize (__dst) / sizeof (wchar_t))
- return __mbsnrtowcs_chk_warn (__dst, __src, __nmc, __len, __ps,
- (__glibc_objsize (__dst)
- / sizeof (wchar_t)));
- }
- return __mbsnrtowcs_alias (__dst, __src, __nmc, __len, __ps);
+ return __glibc_fortify_n (mbsnrtowcs, __len, sizeof (wchar_t),
+ __glibc_objsize (__dst),
+ __dst, __src, __nmc, __len, __ps);
}
@@ -596,16 +507,8 @@ __fortify_function size_t
__NTH (wcsnrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
size_t __nwc, size_t __len, mbstate_t *__restrict __ps))
{
- if (__glibc_objsize (__dst) != (size_t) -1)
- {
- if (!__builtin_constant_p (__len))
- return __wcsnrtombs_chk (__dst, __src, __nwc, __len, __ps,
- __glibc_objsize (__dst));
-
- if (__len > __glibc_objsize (__dst))
- return __wcsnrtombs_chk_warn (__dst, __src, __nwc, __len, __ps,
- __glibc_objsize (__dst));
- }
- return __wcsnrtombs_alias (__dst, __src, __nwc, __len, __ps);
+ return __glibc_fortify (wcsnrtombs, __len, sizeof (char),
+ __glibc_objsize (__dst),
+ __dst, __src, __nwc, __len, __ps);
}
#endif
--
2.35.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [committed 2.34 3/8] debug: Add tests for _FORTIFY_SOURCE=3
2022-03-11 15:11 [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 1/8] Don't add access size hints to fortifiable functions Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 2/8] Make sure that the fortified function conditionals are constant Siddhesh Poyarekar
@ 2022-03-11 15:11 ` Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 4/8] __glibc_unsafe_len: Fix comment Siddhesh Poyarekar
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Siddhesh Poyarekar @ 2022-03-11 15:11 UTC (permalink / raw)
To: libc-stable; +Cc: carlos, fweimer, Adhemerval Zanella
Add some testing coverage for _FORTIFY_SOURCE=3.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit ad6f2a010c2ce759936de4747f6e0d53991912f8)
---
debug/Makefile | 13 ++++--
debug/tst-chk1.c | 102 +++++++++++++++++++++++++---------------------
debug/tst-chk7.c | 2 +
debug/tst-chk8.cc | 2 +
4 files changed, 69 insertions(+), 50 deletions(-)
create mode 100644 debug/tst-chk7.c
create mode 100644 debug/tst-chk8.cc
diff --git a/debug/Makefile b/debug/Makefile
index 6893111cbf..357f888246 100644
--- a/debug/Makefile
+++ b/debug/Makefile
@@ -120,6 +120,8 @@ CFLAGS-tst-chk3.c += -Wno-format -Wno-deprecated-declarations -Wno-error
CFLAGS-tst-chk4.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
CFLAGS-tst-chk5.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
CFLAGS-tst-chk6.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
+CFLAGS-tst-chk7.c += -Wno-format -Wno-deprecated-declarations -Wno-error
+CFLAGS-tst-chk8.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
CFLAGS-tst-lfschk1.c += -Wno-format -Wno-deprecated-declarations -Wno-error
CFLAGS-tst-lfschk2.c += -Wno-format -Wno-deprecated-declarations -Wno-error
CFLAGS-tst-lfschk3.c += -Wno-format -Wno-deprecated-declarations -Wno-error
@@ -129,6 +131,7 @@ CFLAGS-tst-lfschk6.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
LDLIBS-tst-chk4 = -lstdc++
LDLIBS-tst-chk5 = -lstdc++
LDLIBS-tst-chk6 = -lstdc++
+LDLIBS-tst-chk8 = -lstdc++
LDLIBS-tst-lfschk4 = -lstdc++
LDLIBS-tst-lfschk5 = -lstdc++
LDLIBS-tst-lfschk6 = -lstdc++
@@ -150,16 +153,16 @@ CFLAGS-tst-ssp-1.c += -fstack-protector-all
tests = backtrace-tst tst-longjmp_chk tst-chk1 tst-chk2 tst-chk3 \
tst-lfschk1 tst-lfschk2 tst-lfschk3 test-strcpy_chk test-stpcpy_chk \
- tst-chk4 tst-chk5 tst-chk6 tst-lfschk4 tst-lfschk5 tst-lfschk6 \
- tst-longjmp_chk2 tst-backtrace2 tst-backtrace3 tst-backtrace4 \
- tst-backtrace5 tst-backtrace6
+ tst-chk4 tst-chk5 tst-chk6 tst-chk7 tst-chk8 tst-lfschk4 tst-lfschk5 \
+ tst-lfschk6 tst-longjmp_chk2 tst-backtrace2 tst-backtrace3 \
+ tst-backtrace4 tst-backtrace5 tst-backtrace6
ifeq ($(have-ssp),yes)
tests += tst-ssp-1
endif
ifeq (,$(CXX))
-tests-unsupported = tst-chk4 tst-chk5 tst-chk6 \
+tests-unsupported = tst-chk4 tst-chk5 tst-chk6 tst-chk8 \
tst-lfschk4 tst-lfschk5 tst-lfschk6
endif
@@ -193,6 +196,8 @@ $(objpfx)tst-chk3.out: $(gen-locales)
$(objpfx)tst-chk4.out: $(gen-locales)
$(objpfx)tst-chk5.out: $(gen-locales)
$(objpfx)tst-chk6.out: $(gen-locales)
+$(objpfx)tst-chk7.out: $(gen-locales)
+$(objpfx)tst-chk8.out: $(gen-locales)
$(objpfx)tst-lfschk1.out: $(gen-locales)
$(objpfx)tst-lfschk2.out: $(gen-locales)
$(objpfx)tst-lfschk3.out: $(gen-locales)
diff --git a/debug/tst-chk1.c b/debug/tst-chk1.c
index 6c1d32cc62..68ac00d180 100644
--- a/debug/tst-chk1.c
+++ b/debug/tst-chk1.c
@@ -83,8 +83,14 @@ handler (int sig)
_exit (127);
}
+#if __USE_FORTIFY_LEVEL == 3
+volatile size_t buf_size = 10;
+#else
char buf[10];
wchar_t wbuf[10];
+#define buf_size sizeof (buf)
+#endif
+
volatile size_t l0;
volatile char *p;
volatile wchar_t *wp;
@@ -123,6 +129,10 @@ int num2 = 987654;
static int
do_test (void)
{
+#if __USE_FORTIFY_LEVEL == 3
+ char *buf = (char *) malloc (buf_size);
+ wchar_t *wbuf = (wchar_t *) malloc (buf_size * sizeof (wchar_t));
+#endif
set_fortify_handler (handler);
struct A { char buf1[9]; char buf2[1]; } a;
@@ -947,93 +957,93 @@ do_test (void)
rewind (stdin);
- if (fgets (buf, sizeof (buf), stdin) != buf
+ if (fgets (buf, buf_size, stdin) != buf
|| memcmp (buf, "abcdefgh\n", 10))
FAIL ();
- if (fgets (buf, sizeof (buf), stdin) != buf || memcmp (buf, "ABCDEFGHI", 10))
+ if (fgets (buf, buf_size, stdin) != buf || memcmp (buf, "ABCDEFGHI", 10))
FAIL ();
rewind (stdin);
- if (fgets (buf, l0 + sizeof (buf), stdin) != buf
+ if (fgets (buf, l0 + buf_size, stdin) != buf
|| memcmp (buf, "abcdefgh\n", 10))
FAIL ();
#if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
- if (fgets (buf, sizeof (buf) + 1, stdin) != buf)
+ if (fgets (buf, buf_size + 1, stdin) != buf)
FAIL ();
CHK_FAIL_END
CHK_FAIL_START
- if (fgets (buf, l0 + sizeof (buf) + 1, stdin) != buf)
+ if (fgets (buf, l0 + buf_size + 1, stdin) != buf)
FAIL ();
CHK_FAIL_END
#endif
rewind (stdin);
- if (fgets_unlocked (buf, sizeof (buf), stdin) != buf
+ if (fgets_unlocked (buf, buf_size, stdin) != buf
|| memcmp (buf, "abcdefgh\n", 10))
FAIL ();
- if (fgets_unlocked (buf, sizeof (buf), stdin) != buf
+ if (fgets_unlocked (buf, buf_size, stdin) != buf
|| memcmp (buf, "ABCDEFGHI", 10))
FAIL ();
rewind (stdin);
- if (fgets_unlocked (buf, l0 + sizeof (buf), stdin) != buf
+ if (fgets_unlocked (buf, l0 + buf_size, stdin) != buf
|| memcmp (buf, "abcdefgh\n", 10))
FAIL ();
#if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
- if (fgets_unlocked (buf, sizeof (buf) + 1, stdin) != buf)
+ if (fgets_unlocked (buf, buf_size + 1, stdin) != buf)
FAIL ();
CHK_FAIL_END
CHK_FAIL_START
- if (fgets_unlocked (buf, l0 + sizeof (buf) + 1, stdin) != buf)
+ if (fgets_unlocked (buf, l0 + buf_size + 1, stdin) != buf)
FAIL ();
CHK_FAIL_END
#endif
rewind (stdin);
- if (fread (buf, 1, sizeof (buf), stdin) != sizeof (buf)
+ if (fread (buf, 1, buf_size, stdin) != buf_size
|| memcmp (buf, "abcdefgh\nA", 10))
FAIL ();
- if (fread (buf, sizeof (buf), 1, stdin) != 1
+ if (fread (buf, buf_size, 1, stdin) != 1
|| memcmp (buf, "BCDEFGHI\na", 10))
FAIL ();
rewind (stdin);
- if (fread (buf, l0 + 1, sizeof (buf), stdin) != sizeof (buf)
+ if (fread (buf, l0 + 1, buf_size, stdin) != buf_size
|| memcmp (buf, "abcdefgh\nA", 10))
FAIL ();
- if (fread (buf, sizeof (buf), l0 + 1, stdin) != 1
+ if (fread (buf, buf_size, l0 + 1, stdin) != 1
|| memcmp (buf, "BCDEFGHI\na", 10))
FAIL ();
#if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
- if (fread (buf, 1, sizeof (buf) + 1, stdin) != sizeof (buf) + 1)
+ if (fread (buf, 1, buf_size + 1, stdin) != buf_size + 1)
FAIL ();
CHK_FAIL_END
CHK_FAIL_START
- if (fread (buf, sizeof (buf) + 1, l0 + 1, stdin) != 1)
+ if (fread (buf, buf_size + 1, l0 + 1, stdin) != 1)
FAIL ();
CHK_FAIL_END
#endif
rewind (stdin);
- if (fread_unlocked (buf, 1, sizeof (buf), stdin) != sizeof (buf)
+ if (fread_unlocked (buf, 1, buf_size, stdin) != buf_size
|| memcmp (buf, "abcdefgh\nA", 10))
FAIL ();
- if (fread_unlocked (buf, sizeof (buf), 1, stdin) != 1
+ if (fread_unlocked (buf, buf_size, 1, stdin) != 1
|| memcmp (buf, "BCDEFGHI\na", 10))
FAIL ();
@@ -1048,100 +1058,100 @@ do_test (void)
rewind (stdin);
- if (fread_unlocked (buf, l0 + 1, sizeof (buf), stdin) != sizeof (buf)
+ if (fread_unlocked (buf, l0 + 1, buf_size, stdin) != buf_size
|| memcmp (buf, "abcdefgh\nA", 10))
FAIL ();
- if (fread_unlocked (buf, sizeof (buf), l0 + 1, stdin) != 1
+ if (fread_unlocked (buf, buf_size, l0 + 1, stdin) != 1
|| memcmp (buf, "BCDEFGHI\na", 10))
FAIL ();
#if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
- if (fread_unlocked (buf, 1, sizeof (buf) + 1, stdin) != sizeof (buf) + 1)
+ if (fread_unlocked (buf, 1, buf_size + 1, stdin) != buf_size + 1)
FAIL ();
CHK_FAIL_END
CHK_FAIL_START
- if (fread_unlocked (buf, sizeof (buf) + 1, l0 + 1, stdin) != 1)
+ if (fread_unlocked (buf, buf_size + 1, l0 + 1, stdin) != 1)
FAIL ();
CHK_FAIL_END
#endif
lseek (fileno (stdin), 0, SEEK_SET);
- if (read (fileno (stdin), buf, sizeof (buf) - 1) != sizeof (buf) - 1
+ if (read (fileno (stdin), buf, buf_size - 1) != buf_size - 1
|| memcmp (buf, "abcdefgh\n", 9))
FAIL ();
- if (read (fileno (stdin), buf, sizeof (buf) - 1) != sizeof (buf) - 1
+ if (read (fileno (stdin), buf, buf_size - 1) != buf_size - 1
|| memcmp (buf, "ABCDEFGHI", 9))
FAIL ();
lseek (fileno (stdin), 0, SEEK_SET);
- if (read (fileno (stdin), buf, l0 + sizeof (buf) - 1) != sizeof (buf) - 1
+ if (read (fileno (stdin), buf, l0 + buf_size - 1) != buf_size - 1
|| memcmp (buf, "abcdefgh\n", 9))
FAIL ();
#if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
- if (read (fileno (stdin), buf, sizeof (buf) + 1) != sizeof (buf) + 1)
+ if (read (fileno (stdin), buf, buf_size + 1) != buf_size + 1)
FAIL ();
CHK_FAIL_END
CHK_FAIL_START
- if (read (fileno (stdin), buf, l0 + sizeof (buf) + 1) != sizeof (buf) + 1)
+ if (read (fileno (stdin), buf, l0 + buf_size + 1) != buf_size + 1)
FAIL ();
CHK_FAIL_END
#endif
- if (pread (fileno (stdin), buf, sizeof (buf) - 1, sizeof (buf) - 2)
- != sizeof (buf) - 1
+ if (pread (fileno (stdin), buf, buf_size - 1, buf_size - 2)
+ != buf_size - 1
|| memcmp (buf, "\nABCDEFGH", 9))
FAIL ();
- if (pread (fileno (stdin), buf, sizeof (buf) - 1, 0) != sizeof (buf) - 1
+ if (pread (fileno (stdin), buf, buf_size - 1, 0) != buf_size - 1
|| memcmp (buf, "abcdefgh\n", 9))
FAIL ();
- if (pread (fileno (stdin), buf, l0 + sizeof (buf) - 1, sizeof (buf) - 3)
- != sizeof (buf) - 1
+ if (pread (fileno (stdin), buf, l0 + buf_size - 1, buf_size - 3)
+ != buf_size - 1
|| memcmp (buf, "h\nABCDEFG", 9))
FAIL ();
#if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
- if (pread (fileno (stdin), buf, sizeof (buf) + 1, 2 * sizeof (buf))
- != sizeof (buf) + 1)
+ if (pread (fileno (stdin), buf, buf_size + 1, 2 * buf_size)
+ != buf_size + 1)
FAIL ();
CHK_FAIL_END
CHK_FAIL_START
- if (pread (fileno (stdin), buf, l0 + sizeof (buf) + 1, 2 * sizeof (buf))
- != sizeof (buf) + 1)
+ if (pread (fileno (stdin), buf, l0 + buf_size + 1, 2 * buf_size)
+ != buf_size + 1)
FAIL ();
CHK_FAIL_END
#endif
- if (pread64 (fileno (stdin), buf, sizeof (buf) - 1, sizeof (buf) - 2)
- != sizeof (buf) - 1
+ if (pread64 (fileno (stdin), buf, buf_size - 1, buf_size - 2)
+ != buf_size - 1
|| memcmp (buf, "\nABCDEFGH", 9))
FAIL ();
- if (pread64 (fileno (stdin), buf, sizeof (buf) - 1, 0) != sizeof (buf) - 1
+ if (pread64 (fileno (stdin), buf, buf_size - 1, 0) != buf_size - 1
|| memcmp (buf, "abcdefgh\n", 9))
FAIL ();
- if (pread64 (fileno (stdin), buf, l0 + sizeof (buf) - 1, sizeof (buf) - 3)
- != sizeof (buf) - 1
+ if (pread64 (fileno (stdin), buf, l0 + buf_size - 1, buf_size - 3)
+ != buf_size - 1
|| memcmp (buf, "h\nABCDEFG", 9))
FAIL ();
#if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
- if (pread64 (fileno (stdin), buf, sizeof (buf) + 1, 2 * sizeof (buf))
- != sizeof (buf) + 1)
+ if (pread64 (fileno (stdin), buf, buf_size + 1, 2 * buf_size)
+ != buf_size + 1)
FAIL ();
CHK_FAIL_END
CHK_FAIL_START
- if (pread64 (fileno (stdin), buf, l0 + sizeof (buf) + 1, 2 * sizeof (buf))
- != sizeof (buf) + 1)
+ if (pread64 (fileno (stdin), buf, l0 + buf_size + 1, 2 * buf_size)
+ != buf_size + 1)
FAIL ();
CHK_FAIL_END
#endif
@@ -1179,7 +1189,7 @@ do_test (void)
CHK_FAIL2_END
CHK_FAIL2_START
- snprintf (buf, sizeof (buf), "%3$d\n", 1, 2, 3, 4);
+ snprintf (buf, buf_size, "%3$d\n", 1, 2, 3, 4);
CHK_FAIL2_END
int sp[2];
diff --git a/debug/tst-chk7.c b/debug/tst-chk7.c
new file mode 100644
index 0000000000..2a7b323812
--- /dev/null
+++ b/debug/tst-chk7.c
@@ -0,0 +1,2 @@
+#define _FORTIFY_SOURCE 3
+#include "tst-chk1.c"
diff --git a/debug/tst-chk8.cc b/debug/tst-chk8.cc
new file mode 100644
index 0000000000..2a7b323812
--- /dev/null
+++ b/debug/tst-chk8.cc
@@ -0,0 +1,2 @@
+#define _FORTIFY_SOURCE 3
+#include "tst-chk1.c"
--
2.35.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [committed 2.34 4/8] __glibc_unsafe_len: Fix comment
2022-03-11 15:11 [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes Siddhesh Poyarekar
` (2 preceding siblings ...)
2022-03-11 15:11 ` [committed 2.34 3/8] debug: Add tests for _FORTIFY_SOURCE=3 Siddhesh Poyarekar
@ 2022-03-11 15:11 ` Siddhesh Poyarekar
2022-03-11 15:12 ` [committed 2.34 5/8] fortify: Fix spurious warning with realpath Siddhesh Poyarekar
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Siddhesh Poyarekar @ 2022-03-11 15:11 UTC (permalink / raw)
To: libc-stable; +Cc: carlos, fweimer
We know that the length is *unsafe*.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
(cherry picked from commit ae23fa3e5fe24daf94fc7f8e5268bb8ceeda7477)
---
misc/sys/cdefs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index 4825ff0351..3bb9f38916 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -168,7 +168,7 @@
__s, __osz)) \
&& __glibc_safe_len_cond ((__SIZE_TYPE__) (__l), __s, __osz))
-/* Conversely, we know at compile time that the length is safe if the
+/* Conversely, we know at compile time that the length is unsafe if the
__L * __S <= __OBJSZ condition can be folded to a constant and if it is
false. */
#define __glibc_unsafe_len(__l, __s, __osz) \
--
2.35.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [committed 2.34 5/8] fortify: Fix spurious warning with realpath
2022-03-11 15:11 [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes Siddhesh Poyarekar
` (3 preceding siblings ...)
2022-03-11 15:11 ` [committed 2.34 4/8] __glibc_unsafe_len: Fix comment Siddhesh Poyarekar
@ 2022-03-11 15:12 ` Siddhesh Poyarekar
2022-03-11 15:12 ` [committed 2.34 6/8] Enable _FORTIFY_SOURCE=3 for gcc 12 and above Siddhesh Poyarekar
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: Siddhesh Poyarekar @ 2022-03-11 15:12 UTC (permalink / raw)
To: libc-stable; +Cc: carlos, fweimer, Adhemerval Zanella
The length and object size arguments were swapped around for realpath.
Also add a smoke test so that any changes in this area get caught in
future.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit 2bbd07c715275eb6c616988925738a0517180d57)
---
debug/Makefile | 3 ++-
debug/tst-realpath-chk.c | 37 +++++++++++++++++++++++++++++++++++++
stdlib/bits/stdlib.h | 2 +-
3 files changed, 40 insertions(+), 2 deletions(-)
create mode 100644 debug/tst-realpath-chk.c
diff --git a/debug/Makefile b/debug/Makefile
index 357f888246..bc37e466ee 100644
--- a/debug/Makefile
+++ b/debug/Makefile
@@ -108,6 +108,7 @@ CFLAGS-tst-longjmp_chk2.c += -fexceptions -fasynchronous-unwind-tables
CPPFLAGS-tst-longjmp_chk2.c += -D_FORTIFY_SOURCE=1
CFLAGS-tst-longjmp_chk3.c += -fexceptions -fasynchronous-unwind-tables
CPPFLAGS-tst-longjmp_chk3.c += -D_FORTIFY_SOURCE=1
+CPPFLAGS-tst-realpath-chk.c += -D_FORTIFY_SOURCE=2
# We know these tests have problems with format strings, this is what
# we are testing. Disable that warning. They are also testing
@@ -155,7 +156,7 @@ tests = backtrace-tst tst-longjmp_chk tst-chk1 tst-chk2 tst-chk3 \
tst-lfschk1 tst-lfschk2 tst-lfschk3 test-strcpy_chk test-stpcpy_chk \
tst-chk4 tst-chk5 tst-chk6 tst-chk7 tst-chk8 tst-lfschk4 tst-lfschk5 \
tst-lfschk6 tst-longjmp_chk2 tst-backtrace2 tst-backtrace3 \
- tst-backtrace4 tst-backtrace5 tst-backtrace6
+ tst-backtrace4 tst-backtrace5 tst-backtrace6 tst-realpath-chk
ifeq ($(have-ssp),yes)
tests += tst-ssp-1
diff --git a/debug/tst-realpath-chk.c b/debug/tst-realpath-chk.c
new file mode 100644
index 0000000000..a8fcb327c4
--- /dev/null
+++ b/debug/tst-realpath-chk.c
@@ -0,0 +1,37 @@
+/* Smoke test to verify that realpath does not cause spurious warnings.
+ Copyright The GNU Toolchain Authors.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <limits.h>
+#include <stdlib.h>
+
+#include <support/check.h>
+#include <support/support.h>
+
+static int
+do_test (void)
+{
+#ifdef PATH_MAX
+ char buf[PATH_MAX + 1];
+ char *res = realpath (".", buf);
+ TEST_VERIFY (res == buf);
+#endif
+
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h
index 067115eeca..ccacbdf76a 100644
--- a/stdlib/bits/stdlib.h
+++ b/stdlib/bits/stdlib.h
@@ -42,7 +42,7 @@ __NTH (realpath (const char *__restrict __name, char *__restrict __resolved))
return __realpath_alias (__name, __resolved);
#if defined _LIBC_LIMITS_H_ && defined PATH_MAX
- if (__glibc_unsafe_len (sz, sizeof (char), PATH_MAX))
+ if (__glibc_unsafe_len (PATH_MAX, sizeof (char), sz))
return __realpath_chk_warn (__name, __resolved, sz);
#endif
return __realpath_chk (__name, __resolved, sz);
--
2.35.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [committed 2.34 6/8] Enable _FORTIFY_SOURCE=3 for gcc 12 and above
2022-03-11 15:11 [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes Siddhesh Poyarekar
` (4 preceding siblings ...)
2022-03-11 15:12 ` [committed 2.34 5/8] fortify: Fix spurious warning with realpath Siddhesh Poyarekar
@ 2022-03-11 15:12 ` Siddhesh Poyarekar
2022-03-11 15:12 ` [committed 2.34 7/8] debug: Autogenerate _FORTIFY_SOURCE tests Siddhesh Poyarekar
2022-03-11 15:12 ` [committed 2.34 8/8] debug: Synchronize feature guards in fortified functions [BZ #28746] Siddhesh Poyarekar
7 siblings, 0 replies; 9+ messages in thread
From: Siddhesh Poyarekar @ 2022-03-11 15:12 UTC (permalink / raw)
To: libc-stable; +Cc: carlos, fweimer, Adhemerval Zanella
gcc 12 now has support for the __builtin_dynamic_object_size builtin.
Adapt the macro checks to enable _FORTIFY_SOURCE=3 on gcc 12 and above.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit 86bf0feb0e3ec8e37872f72499d6ae33406561d7)
---
include/features.h | 4 +++-
misc/sys/cdefs.h | 3 ++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/include/features.h b/include/features.h
index d974eabfaf..933499bcff 100644
--- a/include/features.h
+++ b/include/features.h
@@ -412,7 +412,9 @@
# warning _FORTIFY_SOURCE requires compiling with optimization (-O)
# elif !__GNUC_PREREQ (4, 1)
# warning _FORTIFY_SOURCE requires GCC 4.1 or later
-# elif _FORTIFY_SOURCE > 2 && __glibc_clang_prereq (9, 0)
+# elif _FORTIFY_SOURCE > 2 && (__glibc_clang_prereq (9, 0) \
+ || __GNUC_PREREQ (12, 0))
+
# if _FORTIFY_SOURCE > 3
# warning _FORTIFY_SOURCE > 3 is treated like 3 on this platform
# endif
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index 3bb9f38916..515fb681a0 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -142,7 +142,8 @@
#define __bos0(ptr) __builtin_object_size (ptr, 0)
/* Use __builtin_dynamic_object_size at _FORTIFY_SOURCE=3 when available. */
-#if __USE_FORTIFY_LEVEL == 3 && __glibc_clang_prereq (9, 0)
+#if __USE_FORTIFY_LEVEL == 3 && (__glibc_clang_prereq (9, 0) \
+ || __GNUC_PREREQ (12, 0))
# define __glibc_objsize0(__o) __builtin_dynamic_object_size (__o, 0)
# define __glibc_objsize(__o) __builtin_dynamic_object_size (__o, 1)
#else
--
2.35.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [committed 2.34 7/8] debug: Autogenerate _FORTIFY_SOURCE tests
2022-03-11 15:11 [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes Siddhesh Poyarekar
` (5 preceding siblings ...)
2022-03-11 15:12 ` [committed 2.34 6/8] Enable _FORTIFY_SOURCE=3 for gcc 12 and above Siddhesh Poyarekar
@ 2022-03-11 15:12 ` Siddhesh Poyarekar
2022-03-11 15:12 ` [committed 2.34 8/8] debug: Synchronize feature guards in fortified functions [BZ #28746] Siddhesh Poyarekar
7 siblings, 0 replies; 9+ messages in thread
From: Siddhesh Poyarekar @ 2022-03-11 15:12 UTC (permalink / raw)
To: libc-stable; +Cc: carlos, fweimer, Adhemerval Zanella
Rename debug/tst-chk1.c to debug/tst-fortify.c and add make hackery to
autogenerate tests with different macros enabled to build and run the
same test with different configurations as well as different
fortification levels.
The change also ends up expanding the -lfs tests to include
_FORTIFY_SOURCE=3.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit db27f1251b008280a29d540b4f8ab2a38a0d80af)
---
Makerules | 6 ++
debug/Makefile | 111 +++++++++++++++++-----------
debug/tst-chk2.c | 2 -
debug/tst-chk3.c | 2 -
debug/tst-chk4.cc | 1 -
debug/tst-chk5.cc | 2 -
debug/tst-chk6.cc | 2 -
debug/tst-chk7.c | 2 -
debug/tst-chk8.cc | 2 -
debug/{tst-chk1.c => tst-fortify.c} | 0
debug/tst-lfschk1.c | 2 -
debug/tst-lfschk2.c | 2 -
debug/tst-lfschk3.c | 2 -
debug/tst-lfschk4.cc | 2 -
debug/tst-lfschk5.cc | 2 -
debug/tst-lfschk6.cc | 2 -
16 files changed, 74 insertions(+), 68 deletions(-)
delete mode 100644 debug/tst-chk2.c
delete mode 100644 debug/tst-chk3.c
delete mode 100644 debug/tst-chk4.cc
delete mode 100644 debug/tst-chk5.cc
delete mode 100644 debug/tst-chk6.cc
delete mode 100644 debug/tst-chk7.c
delete mode 100644 debug/tst-chk8.cc
rename debug/{tst-chk1.c => tst-fortify.c} (100%)
delete mode 100644 debug/tst-lfschk1.c
delete mode 100644 debug/tst-lfschk2.c
delete mode 100644 debug/tst-lfschk3.c
delete mode 100644 debug/tst-lfschk4.cc
delete mode 100644 debug/tst-lfschk5.cc
delete mode 100644 debug/tst-lfschk6.cc
diff --git a/Makerules b/Makerules
index 596fa68376..7fbe85719a 100644
--- a/Makerules
+++ b/Makerules
@@ -424,6 +424,12 @@ $(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c)
endef
object-suffixes-left := $(all-object-suffixes)
include $(o-iterator)
+
+define o-iterator-doit
+$(objpfx)%$o: $(objpfx)%.cc $(before-compile); $$(compile-command.cc)
+endef
+object-suffixes-left := $(all-object-suffixes)
+include $(o-iterator)
endif
# Generate .dT files as we compile.
diff --git a/debug/Makefile b/debug/Makefile
index bc37e466ee..acc1b8f6ad 100644
--- a/debug/Makefile
+++ b/debug/Makefile
@@ -1,4 +1,5 @@
-# Copyright (C) 1998-2021 Free Software Foundation, Inc.
+# Copyright (C) 1998-2022 Free Software Foundation, Inc.
+# Copyright The GNU Toolchain Authors.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
@@ -110,32 +111,60 @@ CFLAGS-tst-longjmp_chk3.c += -fexceptions -fasynchronous-unwind-tables
CPPFLAGS-tst-longjmp_chk3.c += -D_FORTIFY_SOURCE=1
CPPFLAGS-tst-realpath-chk.c += -D_FORTIFY_SOURCE=2
+# _FORTIFY_SOURCE tests.
+# Auto-generate tests for _FORTIFY_SOURCE for different levels, compilers and
+# preprocessor conditions based on tst-fortify.c.
+#
+# To add a new test condition, define a cflags-$(cond) make variable to set
+# CFLAGS for the file.
+
+tests-all-chk = tst-fortify
+tests-c-chk =
+tests-cc-chk =
+
+CFLAGS-tst-fortify.c += -Wno-format -Wno-deprecated-declarations -Wno-error
+
+# No additional flags for the default tests.
+define cflags-default
+endef
+
+define cflags-lfs
+CFLAGS-tst-fortify-$(1)-lfs-$(2).$(1) += -D_FILE_OFFSET_BITS=64
+endef
+
# We know these tests have problems with format strings, this is what
# we are testing. Disable that warning. They are also testing
# deprecated functions (notably gets) so disable that warning as well.
# And they also generate warnings from warning attributes, which
# cannot be disabled via pragmas, so require -Wno-error to be used.
-CFLAGS-tst-chk1.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk2.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk3.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk4.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk5.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk6.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk7.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-chk8.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk1.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk2.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk3.c += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk4.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk5.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-CFLAGS-tst-lfschk6.cc += -Wno-format -Wno-deprecated-declarations -Wno-error
-LDLIBS-tst-chk4 = -lstdc++
-LDLIBS-tst-chk5 = -lstdc++
-LDLIBS-tst-chk6 = -lstdc++
-LDLIBS-tst-chk8 = -lstdc++
-LDLIBS-tst-lfschk4 = -lstdc++
-LDLIBS-tst-lfschk5 = -lstdc++
-LDLIBS-tst-lfschk6 = -lstdc++
+define gen-chk-test
+tests-$(1)-chk += tst-fortify-$(1)-$(2)-$(3)
+CFLAGS-tst-fortify-$(1)-$(2)-$(3).$(1) += -D_FORTIFY_SOURCE=$(3) -Wno-format \
+ -Wno-deprecated-declarations \
+ -Wno-error
+$(eval $(call cflags-$(2),$(1),$(3)))
+$(objpfx)tst-fortify-$(1)-$(2)-$(3).$(1): tst-fortify.c Makefile
+ ( echo "/* Autogenerated from Makefile. */"; \
+ echo ""; \
+ echo "#include \"tst-fortify.c\"" ) > $$@.tmp
+ mv $$@.tmp $$@
+endef
+
+chk-extensions = c cc
+chk-types = default lfs
+chk-levels = 1 2 3
+
+$(foreach e,$(chk-extensions), \
+ $(foreach t,$(chk-types), \
+ $(foreach l,$(chk-levels), \
+ $(eval $(call gen-chk-test,$(e),$(t),$(l))))))
+
+tests-all-chk += $(tests-c-chk) $(tests-cc-chk)
+
+define link-cc
+LDLIBS-$(1) = -lstdc++
+endef
+$(foreach t,$(tests-cc-chk), $(eval $(call link-cc,$(t))))
# backtrace_symbols only works if we link with -rdynamic. backtrace
# requires unwind tables on most architectures.
@@ -152,19 +181,25 @@ LDFLAGS-tst-backtrace6 = -rdynamic
CFLAGS-tst-ssp-1.c += -fstack-protector-all
-tests = backtrace-tst tst-longjmp_chk tst-chk1 tst-chk2 tst-chk3 \
- tst-lfschk1 tst-lfschk2 tst-lfschk3 test-strcpy_chk test-stpcpy_chk \
- tst-chk4 tst-chk5 tst-chk6 tst-chk7 tst-chk8 tst-lfschk4 tst-lfschk5 \
- tst-lfschk6 tst-longjmp_chk2 tst-backtrace2 tst-backtrace3 \
- tst-backtrace4 tst-backtrace5 tst-backtrace6 tst-realpath-chk
+tests = backtrace-tst \
+ tst-longjmp_chk \
+ test-strcpy_chk \
+ test-stpcpy_chk \
+ tst-longjmp_chk2 \
+ tst-backtrace2 \
+ tst-backtrace3 \
+ tst-backtrace4 \
+ tst-backtrace5 \
+ tst-backtrace6 \
+ tst-realpath-chk \
+ $(tests-all-chk)
ifeq ($(have-ssp),yes)
tests += tst-ssp-1
endif
ifeq (,$(CXX))
-tests-unsupported = tst-chk4 tst-chk5 tst-chk6 tst-chk8 \
- tst-lfschk4 tst-lfschk5 tst-lfschk6
+tests-unsupported = $(tests-cc-chk)
endif
extra-libs = libSegFault libpcprofile
@@ -191,20 +226,10 @@ ifeq ($(run-built-tests),yes)
LOCALES := de_DE.UTF-8
include ../gen-locales.mk
-$(objpfx)tst-chk1.out: $(gen-locales)
-$(objpfx)tst-chk2.out: $(gen-locales)
-$(objpfx)tst-chk3.out: $(gen-locales)
-$(objpfx)tst-chk4.out: $(gen-locales)
-$(objpfx)tst-chk5.out: $(gen-locales)
-$(objpfx)tst-chk6.out: $(gen-locales)
-$(objpfx)tst-chk7.out: $(gen-locales)
-$(objpfx)tst-chk8.out: $(gen-locales)
-$(objpfx)tst-lfschk1.out: $(gen-locales)
-$(objpfx)tst-lfschk2.out: $(gen-locales)
-$(objpfx)tst-lfschk3.out: $(gen-locales)
-$(objpfx)tst-lfschk4.out: $(gen-locales)
-$(objpfx)tst-lfschk5.out: $(gen-locales)
-$(objpfx)tst-lfschk6.out: $(gen-locales)
+define chk-gen-locales
+$(objpfx)$(1).out: $(gen-locales)
+endef
+$(foreach t, $(tests-all-chk), $(eval $(call chk-gen-locales,$(t))))
endif
sLIBdir := $(shell echo $(slibdir) | sed 's,lib\(\|64\)$$,\\\\$$LIB,')
diff --git a/debug/tst-chk2.c b/debug/tst-chk2.c
deleted file mode 100644
index be37ce2d22..0000000000
--- a/debug/tst-chk2.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FORTIFY_SOURCE 1
-#include "tst-chk1.c"
diff --git a/debug/tst-chk3.c b/debug/tst-chk3.c
deleted file mode 100644
index 38b8e4fb36..0000000000
--- a/debug/tst-chk3.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FORTIFY_SOURCE 2
-#include "tst-chk1.c"
diff --git a/debug/tst-chk4.cc b/debug/tst-chk4.cc
deleted file mode 100644
index c82e6aac86..0000000000
--- a/debug/tst-chk4.cc
+++ /dev/null
@@ -1 +0,0 @@
-#include "tst-chk1.c"
diff --git a/debug/tst-chk5.cc b/debug/tst-chk5.cc
deleted file mode 100644
index be37ce2d22..0000000000
--- a/debug/tst-chk5.cc
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FORTIFY_SOURCE 1
-#include "tst-chk1.c"
diff --git a/debug/tst-chk6.cc b/debug/tst-chk6.cc
deleted file mode 100644
index 38b8e4fb36..0000000000
--- a/debug/tst-chk6.cc
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FORTIFY_SOURCE 2
-#include "tst-chk1.c"
diff --git a/debug/tst-chk7.c b/debug/tst-chk7.c
deleted file mode 100644
index 2a7b323812..0000000000
--- a/debug/tst-chk7.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FORTIFY_SOURCE 3
-#include "tst-chk1.c"
diff --git a/debug/tst-chk8.cc b/debug/tst-chk8.cc
deleted file mode 100644
index 2a7b323812..0000000000
--- a/debug/tst-chk8.cc
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FORTIFY_SOURCE 3
-#include "tst-chk1.c"
diff --git a/debug/tst-chk1.c b/debug/tst-fortify.c
similarity index 100%
rename from debug/tst-chk1.c
rename to debug/tst-fortify.c
diff --git a/debug/tst-lfschk1.c b/debug/tst-lfschk1.c
deleted file mode 100644
index f3e6d47d5e..0000000000
--- a/debug/tst-lfschk1.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FILE_OFFSET_BITS 64
-#include "tst-chk1.c"
diff --git a/debug/tst-lfschk2.c b/debug/tst-lfschk2.c
deleted file mode 100644
index 95d4db1d32..0000000000
--- a/debug/tst-lfschk2.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FILE_OFFSET_BITS 64
-#include "tst-chk2.c"
diff --git a/debug/tst-lfschk3.c b/debug/tst-lfschk3.c
deleted file mode 100644
index 50a1ae1258..0000000000
--- a/debug/tst-lfschk3.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FILE_OFFSET_BITS 64
-#include "tst-chk3.c"
diff --git a/debug/tst-lfschk4.cc b/debug/tst-lfschk4.cc
deleted file mode 100644
index f3e6d47d5e..0000000000
--- a/debug/tst-lfschk4.cc
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FILE_OFFSET_BITS 64
-#include "tst-chk1.c"
diff --git a/debug/tst-lfschk5.cc b/debug/tst-lfschk5.cc
deleted file mode 100644
index 95d4db1d32..0000000000
--- a/debug/tst-lfschk5.cc
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FILE_OFFSET_BITS 64
-#include "tst-chk2.c"
diff --git a/debug/tst-lfschk6.cc b/debug/tst-lfschk6.cc
deleted file mode 100644
index 50a1ae1258..0000000000
--- a/debug/tst-lfschk6.cc
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _FILE_OFFSET_BITS 64
-#include "tst-chk3.c"
--
2.35.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [committed 2.34 8/8] debug: Synchronize feature guards in fortified functions [BZ #28746]
2022-03-11 15:11 [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes Siddhesh Poyarekar
` (6 preceding siblings ...)
2022-03-11 15:12 ` [committed 2.34 7/8] debug: Autogenerate _FORTIFY_SOURCE tests Siddhesh Poyarekar
@ 2022-03-11 15:12 ` Siddhesh Poyarekar
7 siblings, 0 replies; 9+ messages in thread
From: Siddhesh Poyarekar @ 2022-03-11 15:12 UTC (permalink / raw)
To: libc-stable; +Cc: carlos, fweimer, Adhemerval Zanella
Some functions (e.g. stpcpy, pread64, etc.) had moved to POSIX in the
main headers as they got incorporated into the standard, but their
fortified variants remained under __USE_GNU. As a result, these
functions did not get fortified when _GNU_SOURCE was not defined.
Add test wrappers that check all functions tested in tst-chk0 at all
levels with _GNU_SOURCE undefined and then use the failures to (1)
exclude checks for _GNU_SOURCE functions in these tests and (2) Fix
feature macro guards in the fortified function headers so that they're
the same as the ones in the main headers.
This fixes BZ #28746.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit fcfc9086815bf0d277ad47a90ee3fda4c37acca8)
---
debug/Makefile | 10 +++++--
debug/tst-fortify.c | 51 ++++++++++++++++++++++++++++------
posix/bits/unistd.h | 2 +-
string/bits/string_fortified.h | 8 ++++--
support/xsignal.h | 2 ++
wcsmbs/bits/wchar2.h | 2 +-
6 files changed, 59 insertions(+), 16 deletions(-)
diff --git a/debug/Makefile b/debug/Makefile
index acc1b8f6ad..71248e0d45 100644
--- a/debug/Makefile
+++ b/debug/Makefile
@@ -132,6 +132,12 @@ define cflags-lfs
CFLAGS-tst-fortify-$(1)-lfs-$(2).$(1) += -D_FILE_OFFSET_BITS=64
endef
+define cflags-nongnu
+CFLAGS-tst-fortify-$(1)-nongnu-$(2).$(1) += -D_LARGEFILE64_SOURCE=1
+endef
+
+src-chk-nongnu = \#undef _GNU_SOURCE
+
# We know these tests have problems with format strings, this is what
# we are testing. Disable that warning. They are also testing
# deprecated functions (notably gets) so disable that warning as well.
@@ -145,13 +151,13 @@ CFLAGS-tst-fortify-$(1)-$(2)-$(3).$(1) += -D_FORTIFY_SOURCE=$(3) -Wno-format \
$(eval $(call cflags-$(2),$(1),$(3)))
$(objpfx)tst-fortify-$(1)-$(2)-$(3).$(1): tst-fortify.c Makefile
( echo "/* Autogenerated from Makefile. */"; \
- echo ""; \
+ echo "$(src-chk-$(2))"; \
echo "#include \"tst-fortify.c\"" ) > $$@.tmp
mv $$@.tmp $$@
endef
chk-extensions = c cc
-chk-types = default lfs
+chk-types = default lfs nongnu
chk-levels = 1 2 3
$(foreach e,$(chk-extensions), \
diff --git a/debug/tst-fortify.c b/debug/tst-fortify.c
index 68ac00d180..8b5902423c 100644
--- a/debug/tst-fortify.c
+++ b/debug/tst-fortify.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 2004-2021 Free Software Foundation, Inc.
+/* Copyright (C) 2004-2022 Free Software Foundation, Inc.
+ Copyright The GNU Toolchain Authors.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
@@ -37,6 +38,17 @@
#include <sys/socket.h>
#include <sys/un.h>
+#ifndef _GNU_SOURCE
+# define MEMPCPY memcpy
+# define WMEMPCPY wmemcpy
+# define MEMPCPY_RET(x) 0
+# define WMEMPCPY_RET(x) 0
+#else
+# define MEMPCPY mempcpy
+# define WMEMPCPY wmempcpy
+# define MEMPCPY_RET(x) __builtin_strlen (x)
+# define WMEMPCPY_RET(x) wcslen (x)
+#endif
#define obstack_chunk_alloc malloc
#define obstack_chunk_free free
@@ -163,7 +175,7 @@ do_test (void)
if (memcmp (buf, "aabcdefghi", 10))
FAIL ();
- if (mempcpy (buf + 5, "abcde", 5) != buf + 10
+ if (MEMPCPY (buf + 5, "abcde", 5) != buf + 5 + MEMPCPY_RET ("abcde")
|| memcmp (buf, "aabcdabcde", 10))
FAIL ();
@@ -208,7 +220,7 @@ do_test (void)
if (memcmp (buf, "aabcdefghi", 10))
FAIL ();
- if (mempcpy (buf + 5, "abcde", l0 + 5) != buf + 10
+ if (MEMPCPY (buf + 5, "abcde", l0 + 5) != buf + 5 + MEMPCPY_RET ("abcde")
|| memcmp (buf, "aabcdabcde", 10))
FAIL ();
@@ -267,7 +279,8 @@ do_test (void)
if (memcmp (a.buf1, "aabcdefghi", 10))
FAIL ();
- if (mempcpy (a.buf1 + 5, "abcde", l0 + 5) != a.buf1 + 10
+ if (MEMPCPY (a.buf1 + 5, "abcde", l0 + 5)
+ != a.buf1 + 5 + MEMPCPY_RET ("abcde")
|| memcmp (a.buf1, "aabcdabcde", 10))
FAIL ();
@@ -348,6 +361,7 @@ do_test (void)
bcopy (buf + 1, buf + 2, l0 + 9);
CHK_FAIL_END
+#ifdef _GNU_SOURCE
CHK_FAIL_START
p = (char *) mempcpy (buf + 6, "abcde", 5);
CHK_FAIL_END
@@ -355,6 +369,7 @@ do_test (void)
CHK_FAIL_START
p = (char *) mempcpy (buf + 6, "abcde", l0 + 5);
CHK_FAIL_END
+#endif
CHK_FAIL_START
memset (buf + 9, 'j', 2);
@@ -465,6 +480,7 @@ do_test (void)
bcopy (a.buf1 + 1, a.buf1 + 2, l0 + 9);
CHK_FAIL_END
+#ifdef _GNU_SOURCE
CHK_FAIL_START
p = (char *) mempcpy (a.buf1 + 6, "abcde", 5);
CHK_FAIL_END
@@ -472,6 +488,7 @@ do_test (void)
CHK_FAIL_START
p = (char *) mempcpy (a.buf1 + 6, "abcde", l0 + 5);
CHK_FAIL_END
+#endif
CHK_FAIL_START
memset (a.buf1 + 9, 'j', 2);
@@ -551,7 +568,7 @@ do_test (void)
if (wmemcmp (wbuf, L"aabcdefghi", 10))
FAIL ();
- if (wmempcpy (wbuf + 5, L"abcde", 5) != wbuf + 10
+ if (WMEMPCPY (wbuf + 5, L"abcde", 5) != wbuf + 5 + WMEMPCPY_RET (L"abcde")
|| wmemcmp (wbuf, L"aabcdabcde", 10))
FAIL ();
@@ -584,7 +601,8 @@ do_test (void)
if (wmemcmp (wbuf, L"aabcdefghi", 10))
FAIL ();
- if (wmempcpy (wbuf + 5, L"abcde", l0 + 5) != wbuf + 10
+ if (WMEMPCPY (wbuf + 5, L"abcde", l0 + 5)
+ != wbuf + 5 + WMEMPCPY_RET (L"abcde")
|| wmemcmp (wbuf, L"aabcdabcde", 10))
FAIL ();
@@ -626,7 +644,8 @@ do_test (void)
if (wmemcmp (wa.buf1, L"aabcdefghi", 10))
FAIL ();
- if (wmempcpy (wa.buf1 + 5, L"abcde", l0 + 5) != wa.buf1 + 10
+ if (WMEMPCPY (wa.buf1 + 5, L"abcde", l0 + 5)
+ != wa.buf1 + 5 + WMEMPCPY_RET (L"abcde")
|| wmemcmp (wa.buf1, L"aabcdabcde", 10))
FAIL ();
@@ -695,6 +714,7 @@ do_test (void)
wmemmove (wbuf + 2, wbuf + 1, l0 + 9);
CHK_FAIL_END
+#ifdef _GNU_SOURCE
CHK_FAIL_START
wp = wmempcpy (wbuf + 6, L"abcde", 5);
CHK_FAIL_END
@@ -702,6 +722,7 @@ do_test (void)
CHK_FAIL_START
wp = wmempcpy (wbuf + 6, L"abcde", l0 + 5);
CHK_FAIL_END
+#endif
CHK_FAIL_START
wmemset (wbuf + 9, L'j', 2);
@@ -769,6 +790,7 @@ do_test (void)
wmemmove (wa.buf1 + 2, wa.buf1 + 1, l0 + 9);
CHK_FAIL_END
+#ifdef _GNU_SOURCE
CHK_FAIL_START
wp = wmempcpy (wa.buf1 + 6, L"abcde", 5);
CHK_FAIL_END
@@ -776,6 +798,7 @@ do_test (void)
CHK_FAIL_START
wp = wmempcpy (wa.buf1 + 6, L"abcde", l0 + 5);
CHK_FAIL_END
+#endif
CHK_FAIL_START
wmemset (wa.buf1 + 9, L'j', 2);
@@ -907,6 +930,7 @@ do_test (void)
if (fprintf (fp, buf2 + 4, str5) != 7)
FAIL ();
+#ifdef _GNU_SOURCE
char *my_ptr = NULL;
strcpy (buf2 + 2, "%n%s%n");
/* When the format string is writable and contains %n,
@@ -936,6 +960,7 @@ do_test (void)
if (obstack_printf (&obs, "%s%n%s%n", str4, &n1, str5, &n1) != 14)
FAIL ();
obstack_free (&obs, NULL);
+#endif
if (freopen (temp_filename, "r", stdin) == NULL)
{
@@ -983,6 +1008,7 @@ do_test (void)
rewind (stdin);
+#ifdef _GNU_SOURCE
if (fgets_unlocked (buf, buf_size, stdin) != buf
|| memcmp (buf, "abcdefgh\n", 10))
FAIL ();
@@ -1009,6 +1035,7 @@ do_test (void)
#endif
rewind (stdin);
+#endif
if (fread (buf, 1, buf_size, stdin) != buf_size
|| memcmp (buf, "abcdefgh\nA", 10))
@@ -1579,7 +1606,10 @@ do_test (void)
ret = 1;
}
- int fd = posix_openpt (O_RDWR);
+ int fd;
+
+#ifdef _GNU_SOURCE
+ fd = posix_openpt (O_RDWR);
if (fd != -1)
{
char enough[1000];
@@ -1595,6 +1625,7 @@ do_test (void)
#endif
close (fd);
}
+#endif
#if PATH_MAX > 0
confstr (_CS_GNU_LIBC_VERSION, largebuf, sizeof (largebuf));
@@ -1712,8 +1743,9 @@ do_test (void)
poll (fds, l0 + 2, 0);
CHK_FAIL_END
#endif
+#ifdef _GNU_SOURCE
ppoll (fds, 1, NULL, NULL);
-#if __USE_FORTIFY_LEVEL >= 1
+# if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
ppoll (fds, 2, NULL, NULL);
CHK_FAIL_END
@@ -1721,6 +1753,7 @@ do_test (void)
CHK_FAIL_START
ppoll (fds, l0 + 2, NULL, NULL);
CHK_FAIL_END
+# endif
#endif
return ret;
diff --git a/posix/bits/unistd.h b/posix/bits/unistd.h
index 697dcbbf7b..1df7e5ceef 100644
--- a/posix/bits/unistd.h
+++ b/posix/bits/unistd.h
@@ -40,7 +40,7 @@ read (int __fd, void *__buf, size_t __nbytes)
__fd, __buf, __nbytes);
}
-#ifdef __USE_UNIX98
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
extern ssize_t __pread_chk (int __fd, void *__buf, size_t __nbytes,
__off_t __offset, size_t __bufsize)
__wur __attr_access ((__write_only__, 2, 3));
diff --git a/string/bits/string_fortified.h b/string/bits/string_fortified.h
index 5731274848..218006c9ba 100644
--- a/string/bits/string_fortified.h
+++ b/string/bits/string_fortified.h
@@ -79,7 +79,7 @@ __NTH (strcpy (char *__restrict __dest, const char *__restrict __src))
return __builtin___strcpy_chk (__dest, __src, __glibc_objsize (__dest));
}
-#ifdef __USE_GNU
+#ifdef __USE_XOPEN2K8
__fortify_function char *
__NTH (stpcpy (char *__restrict __dest, const char *__restrict __src))
{
@@ -96,14 +96,15 @@ __NTH (strncpy (char *__restrict __dest, const char *__restrict __src,
__glibc_objsize (__dest));
}
-#if __GNUC_PREREQ (4, 7) || __glibc_clang_prereq (2, 6)
+#ifdef __USE_XOPEN2K8
+# if __GNUC_PREREQ (4, 7) || __glibc_clang_prereq (2, 6)
__fortify_function char *
__NTH (stpncpy (char *__dest, const char *__src, size_t __n))
{
return __builtin___stpncpy_chk (__dest, __src, __n,
__glibc_objsize (__dest));
}
-#else
+# else
extern char *__stpncpy_chk (char *__dest, const char *__src, size_t __n,
size_t __destlen) __THROW
__fortified_attr_access ((__write_only__, 1, 3))
@@ -119,6 +120,7 @@ __NTH (stpncpy (char *__dest, const char *__src, size_t __n))
return __stpncpy_chk (__dest, __src, __n, __bos (__dest));
return __stpncpy_alias (__dest, __src, __n);
}
+# endif
#endif
diff --git a/support/xsignal.h b/support/xsignal.h
index 8ee1fa6b4d..692e0f2c42 100644
--- a/support/xsignal.h
+++ b/support/xsignal.h
@@ -28,7 +28,9 @@ __BEGIN_DECLS
terminate the process on error. */
void xraise (int sig);
+#ifdef _GNU_SOURCE
sighandler_t xsignal (int sig, sighandler_t handler);
+#endif
void xsigaction (int sig, const struct sigaction *newact,
struct sigaction *oldact);
diff --git a/wcsmbs/bits/wchar2.h b/wcsmbs/bits/wchar2.h
index 26012ef936..88c1fdfcd3 100644
--- a/wcsmbs/bits/wchar2.h
+++ b/wcsmbs/bits/wchar2.h
@@ -457,7 +457,7 @@ __NTH (wcsrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
}
-#ifdef __USE_GNU
+#ifdef __USE_XOPEN2K8
extern size_t __mbsnrtowcs_chk (wchar_t *__restrict __dst,
const char **__restrict __src, size_t __nmc,
size_t __len, mbstate_t *__restrict __ps,
--
2.35.1
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-- links below jump to the message on this page --
2022-03-11 15:11 [committed 2.34 0/8] _FORTIFY_SOURCE=3 and fixes Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 1/8] Don't add access size hints to fortifiable functions Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 2/8] Make sure that the fortified function conditionals are constant Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 3/8] debug: Add tests for _FORTIFY_SOURCE=3 Siddhesh Poyarekar
2022-03-11 15:11 ` [committed 2.34 4/8] __glibc_unsafe_len: Fix comment Siddhesh Poyarekar
2022-03-11 15:12 ` [committed 2.34 5/8] fortify: Fix spurious warning with realpath Siddhesh Poyarekar
2022-03-11 15:12 ` [committed 2.34 6/8] Enable _FORTIFY_SOURCE=3 for gcc 12 and above Siddhesh Poyarekar
2022-03-11 15:12 ` [committed 2.34 7/8] debug: Autogenerate _FORTIFY_SOURCE tests Siddhesh Poyarekar
2022-03-11 15:12 ` [committed 2.34 8/8] debug: Synchronize feature guards in fortified functions [BZ #28746] Siddhesh Poyarekar
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