* [Bug malloc/12547] realloc(p, 0) violates C99
2011-03-06 22:48 [Bug libc/12547] New: realloc(p, 0) violates C99 msebor at gmail dot com
` (17 preceding siblings ...)
2015-08-22 20:32 ` [Bug malloc/12547] " jsm28 at gcc dot gnu.org
@ 2019-10-03 11:58 ` bugdal at aerifal dot cx
18 siblings, 0 replies; 20+ messages in thread
From: bugdal at aerifal dot cx @ 2019-10-03 11:58 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=12547
--- Comment #17 from Rich Felker <bugdal at aerifal dot cx> ---
FYI the identical issue in Bionic has resulted in a RCE in WhatsApp:
https://awakened1712.github.io/hacking/hacking-whatsapp-gif-rce/
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From: "bradley.gamble at ncipher dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/25050] MB_LEN_MAX incorrect when compiling with _FORTIFY_SOURCE for PowerPC
Date: Thu, 03 Oct 2019 14:27:00 -0000
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--- Comment #4 from Bradley Gamble <bradley.gamble at ncipher dot com> ---
My limits.h is sensible - It contains the correct definitions, for example
(truncated output):
#ifndef _LIBC_LIMITS_H_
#define _LIBC_LIMITS_H_ 1
#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
#include <bits/libc-header-start.h>
/* Maximum length of any multibyte character in any locale.
We define this value here since the gcc header does not define
the correct value. */
#define MB_LEN_MAX 16
/* If we are not using GNU CC we have to define all the symbols ourself.
Otherwise use gcc's definitions (see below). */
#if !defined __GNUC__ || __GNUC__ < 2
/* We only protect from multiple inclusion here, because all the other
#include's protect themselves, and in GCC 2 we may #include_next through
multiple copies of this file before we get to GCC's. */
# ifndef _LIMITS_H
# define _LIMITS_H 1
#include <bits/wordsize.h>
My limitx.h only contains the following:
#ifndef _GCC_LIMITS_H_ /* Terminated in limity.h. */
#define _GCC_LIMITS_H_
#ifndef _LIBC_LIMITS_H_
/* Use "..." so that we find syslimits.h only in this same directory. */
#include "syslimits.h"
#endif
Is there a step I am missing to perform this? I've tried multiple scripts for
cross-compilation and they all encounter this error with -DFORTIFY_SOURCE=2
enabled.
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To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/16634] Application calling dlopen("./a.out",...) may run into _dl_allocate_tls_init: Assertion `listp != ((void *)0)' failed!
Date: Fri, 04 Oct 2019 21:01:00 -0000
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--- Comment #5 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Florian Weimer <fw@sourceware.org>:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=77523d5e43cb5721c23855eb6045b0607a3b30a0
commit 77523d5e43cb5721c23855eb6045b0607a3b30a0
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Oct 4 21:23:51 2019 +0200
elf: Assign TLS modid later during dlopen [BZ #24930]
Commit a42faf59d6d9f82e5293a9ebcc26d9c9e562b12b ("Fix BZ #16634.")
attempted to fix a TLS modid consistency issue by adding additional
checks to the open_verify function. However, this is fragile
because open_verify cannot reliably predict whether
_dl_map_object_from_fd will later fail in the more complex cases
(such as memory allocation failures). Therefore, this commit
assigns the TLS modid as late as possible. At that point, the link
map pointer will eventually be passed to _dl_close, which will undo
the TLS modid assignment.
Reviewed-by: Gabriel F. T. Gomes <gabrielftg@linux.ibm.com>
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Subject: [Bug dynamic-link/24900] ld.so: Explicit loader invocation results in argv[0] in l_libname of main map
Date: Fri, 04 Oct 2019 21:01:00 -0000
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--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Florian Weimer <fw@sourceware.org>:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2b26b084e4e4ba58a2ff9f8f8f14c9bca506bd59
commit 2b26b084e4e4ba58a2ff9f8f8f14c9bca506bd59
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Oct 4 21:22:54 2019 +0200
elf: Never use the file ID of the main executable [BZ #24900]
If the loader is invoked explicitly and loads the main executable,
it stores the file ID of the main executable in l_file_id. This
information is not available if the main excutable is loaded by the
kernel, so this is another case where the two cases differ.
This enhances commit 23d2e5faf0bca6d9b31bef4aa162b95ee64cbfc6
("elf: Self-dlopen failure with explict loader invocation
[BZ #24900]").
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Gabriel F. T. Gomes <gabrielftg@linux.ibm.com>
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Subject: [Bug dynamic-link/24930] dlopen of PIE executable can result in _dl_allocate_tls_init assertion failure
Date: Fri, 04 Oct 2019 21:01:00 -0000
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--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Florian Weimer <fw@sourceware.org>:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=77523d5e43cb5721c23855eb6045b0607a3b30a0
commit 77523d5e43cb5721c23855eb6045b0607a3b30a0
Author: Florian Weimer <fweimer@redhat.com>
Date: Fri Oct 4 21:23:51 2019 +0200
elf: Assign TLS modid later during dlopen [BZ #24930]
Commit a42faf59d6d9f82e5293a9ebcc26d9c9e562b12b ("Fix BZ #16634.")
attempted to fix a TLS modid consistency issue by adding additional
checks to the open_verify function. However, this is fragile
because open_verify cannot reliably predict whether
_dl_map_object_from_fd will later fail in the more complex cases
(such as memory allocation failures). Therefore, this commit
assigns the TLS modid as late as possible. At that point, the link
map pointer will eventually be passed to _dl_close, which will undo
the TLS modid assignment.
Reviewed-by: Gabriel F. T. Gomes <gabrielftg@linux.ibm.com>
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From: "woodard at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/24813] <asm/sigcontext.h> and <signal.h> are mutually incompatible on Linux
Date: Fri, 04 Oct 2019 21:08:00 -0000
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Ben Woodard <woodard at redhat dot com> changed:
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----------------------------------------------------------------------------
CC| |woodard at redhat dot com
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>From glibc-bugs-return-46359-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 04 21:41:38 2019
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To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/24930] dlopen of PIE executable can result in _dl_allocate_tls_init assertion failure
Date: Fri, 04 Oct 2019 21:41:00 -0000
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Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |2.31
Flags| |security-
--- Comment #2 from Florian Weimer <fweimer at redhat dot com> ---
Fixed in glibc 2.31.
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Subject: [Bug libc/24914] support/xsigstack.c assumes non-excutable stack causing failures on HPPA
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Subject: [Bug dynamic-link/25049] dlopen() fails to open a shared object with DT_AUXILIARY field
Date: Fri, 04 Oct 2019 21:46:00 -0000
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Subject: [Bug dynamic-link/25051] aarch64, powerpc64 uses surplus static tls for dynamically loaded dsos
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>From glibc-bugs-return-46364-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 04 21:47:31 2019
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Subject: [Bug libc/25035] sbrk() failure handled poorly in tunables_strdup
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>From glibc-bugs-return-46363-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 04 21:47:19 2019
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Subject: [Bug localedata/25036] Update collation order for Swedish
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>From glibc-bugs-return-46365-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 04 21:47:45 2019
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Subject: [Bug malloc/25030] RFE: malloc() cache line alignment for larger allocations
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>From glibc-bugs-return-46366-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 04 21:48:29 2019
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Subject: [Bug time/25026] Internal use of __itimer_which_t causing warnings/errors in POSIX-compliant code
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>From glibc-bugs-return-46367-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 04 21:50:37 2019
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Subject: [Bug libc/25003] getconf: POSIX_V7_THREADS_CFLAGS and POSIX_V7_THREADS_LDFLAGS missing
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>From glibc-bugs-return-46369-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 04 21:52:56 2019
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Subject: [Bug dynamic-link/24994] $LIB (DL_DST_LIB) is incorrect on multiarch systems
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>From glibc-bugs-return-46368-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 04 21:52:28 2019
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Subject: [Bug stdio/24998] #includes included inside extern C {} regions
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--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
It's likely this isn't the only case.
I think this will be easy to fix once we have the GCC warning in trunk (because
the installed headers test will fail due to -Werror).
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>From glibc-bugs-return-46370-listarch-glibc-bugs=sources.redhat.com@sourceware.org Sat Oct 05 22:21:57 2019
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From: "danglin at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug libc/23296] Data race in setting function descriptor during lazy binding
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https://sourceware.org/bugzilla/show_bug.cgi?id=23296
--- Comment #12 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 12019
--> https://sourceware.org/bugzilla/attachment.cgi?id=12019&action=edit
Patch to fix function descriptor race
The attached change adds support to fix the race in updating and accessing
function descriptors on hppa. The approach used here is to modify binutils and
gcc so that indirect calls load and leave the function pointer for the call in
register %r22. We also mark reloc offsets with a 1 in the least significant
bit of the offset. If the runtime resolver is entered with a reloc offset
without a 1 in the least significant bit, we can then use the function pointer
in %r22 to find and update the descriptor.
The main race is a descriptor being updated between the load of the function
address and the global pointer. However, PA 2.0 machines support out-of-order
execution of loads and stores, and can appear to execute out-of-order when
viewed from another processor. I have revamped the code so glibc stores the
global pointer before the function address, and binutils and gcc generated code
load the function address before the global pointer. We need to avoid the
situation where we branch to functions with an incorrect global pointer. I've
never seen this happen but technically the function pointer store and load need
to be ordered (see page G-2 of PA-RISC Architecture).
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Subject: [Bug libc/23296] Data race in setting function descriptor during lazy binding
Date: Sat, 05 Oct 2019 22:22:00 -0000
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--- Comment #13 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 12020
--> https://sourceware.org/bugzilla/attachment.cgi?id=12020&action=edit
Binutils patch
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Subject: [Bug libc/23296] Data race in setting function descriptor during lazy binding
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--- Comment #14 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 12021
--> https://sourceware.org/bugzilla/attachment.cgi?id=12021&action=edit
GCC patch
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>From glibc-bugs-return-46373-listarch-glibc-bugs=sources.redhat.com@sourceware.org Sat Oct 05 22:39:51 2019
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Subject: [Bug nptl/25066] New: FAIL: nptl/tst-tls1 on hppa
Date: Sat, 05 Oct 2019 22:39:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=25066
Bug ID: 25066
Summary: FAIL: nptl/tst-tls1 on hppa
Product: glibc
Version: unspecified
Status: NEW
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Priority: P2
Component: nptl
Assignee: unassigned at sourceware dot org
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Created attachment 12022
--> https://sourceware.org/bugzilla/attachment.cgi?id=12022&action=edit
Patch to check stack alignment in clone
The nptl/tst-tls1 test calls pthread_create with a misaligned stack:
/* Also check the alignment of the tls variables if a misaligned stack is
specified. */
pthread_t th;
void *thr_stack = NULL;
thr_stack = xposix_memalign (0x200, STACK_SIZE + 1);
xpthread_attr_setstack (&a, thr_stack + 1, STACK_SIZE);
th = xpthread_create (&a, tf, NULL);
xpthread_join (th);
free (thr_stack);
This fails on hppa because the stack needs to be at least word aligned in
syscalls.
One possible fix is to check the stack alignment in clone. But this doesn't
fix test. However, as far as I can tell, it seem legit to reject a misaligned
stack.
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>From glibc-bugs-return-46374-listarch-glibc-bugs=sources.redhat.com@sourceware.org Tue Oct 08 13:58:31 2019
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Subject: [Bug dynamic-link/20839] Incomplete rollback of dynamic linker state on linking failure
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Carlos O'Donell <carlos at redhat dot com> changed:
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CC| |carlos at redhat dot com
See Also| |https://bugzilla.redhat.com
| |/show_bug.cgi?id=1624941
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>From glibc-bugs-return-46375-listarch-glibc-bugs=sources.redhat.com@sourceware.org Tue Oct 08 14:03:33 2019
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Subject: [Bug dynamic-link/23462] Static binary with dynamic string tokens crashes.
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>From glibc-bugs-return-46377-listarch-glibc-bugs=sources.redhat.com@sourceware.org Tue Oct 08 14:04:41 2019
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Subject: [Bug dynamic-link/23462] Static binary with dynamic string tokens crashes.
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Florian Weimer <fweimer at redhat dot com> changed:
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--- Comment #1 from Carlos O'Donell <carlos at redhat dot com> ---
OK, so for real I'm going to post this. I dropped the ball.
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Subject: [Bug dynamic-link/23462] Static binary with dynamic string tokens crashes.
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--- Comment #1 from Carlos O'Donell <carlos at redhat dot com> ---
OK, so for real I'm going to post this. I dropped the ball.
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>From glibc-bugs-return-46378-listarch-glibc-bugs=sources.redhat.com@sourceware.org Tue Oct 08 22:18:59 2019
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From: "danglin at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug time/25085] New: zic.c:1369:23: error: writing 4 bytes into a region of size 1
Date: Tue, 08 Oct 2019 22:18:00 -0000
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Bug ID: 25085
Summary: zic.c:1369:23: error: writing 4 bytes into a region of
size 1
Product: glibc
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Status: NEW
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Priority: P2
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With gcc-10 (trunk), I see the following build error on hppa-unknown-linux-gnu:
/home/dave/gnu/glibc/objdir/config.h -Wno-maybe-uninitialized
-Wno-unused-varia
ble -I../include -I/home/dave/gnu/glibc/objdir/timezone
-I/home/dave/gnu
/glibc/objdir -I../sysdeps/unix/sysv/linux/hppa -I../sysdeps/hppa/nptl
-I../s
ysdeps/unix/sysv/linux/include -I../sysdeps/unix/sysv/linux -I../sysdeps/nptl
-I../sysdeps/pthread -I../sysdeps/gnu -I../sysdeps/unix/inet
-I../sysdeps/unix/sysv -I../sysdeps/unix -I../sysdeps/posix
-I../sysdeps/hppa/hppa1.1 -I../sysdeps/wordsize-32
-I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/hppa/fpu
-I../sysdeps/hppa -I../sysdeps/ieee754 -I../sysdeps/generic -I.. -I../libio
-I. -nostdinc -isystem
/home/dave/opt/test/lib/gcc/hppa-linux-gnu/10.0.0/include -isystem
/home/dave/opt/test/lib/gcc/hppa-linux-gnu/10.0.0/include-fixed -isystem
/usr/include -D_LIBC_REENTRANT -include
/home/dave/gnu/glibc/objdir/libc-modules.h -DMODULE_NAME=nonlib -include
../include/libc-symbols.h -DTOP_NAMESPACE=glibc -o
/home/dave/gnu/glibc/objdir/timezone/zic.o -MD -MP -MF
/home/dave/gnu/glibc/objdir/timezone/zic.o.dt -MT
/home/dave/gnu/glibc/objdir/timezone/zic.o
zic.c: In function 'inzsub':
zic.c:1369:23: error: writing 4 bytes into a region of size 1
[-Werror=stringop-overflow=]
1369 | z.z_format_specifier = cp ? *cp : '\0';
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
zic.c:124:8: note: destination object declared here
124 | char z_format_specifier;
| ^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[2]: *** [../o-iterator.mk:9: /home/dave/gnu/glibc/objdir/timezone/zic.o]
Error 1
make[2]: Leaving directory '/home/dave/gnu/glibc/glibc/timezone'
make[1]: *** [Makefile:429: timezone/others] Error 2
make[1]: Leaving directory '/home/dave/gnu/glibc/glibc'
make: *** [Makefile:9: all] Error 2
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>From glibc-bugs-return-46379-listarch-glibc-bugs=sources.redhat.com@sourceware.org Tue Oct 08 22:22:51 2019
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From: "joseph at codesourcery dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug time/25085] zic.c:1369:23: error: writing 4 bytes into a region of size 1
Date: Tue, 08 Oct 2019 22:22:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Have you have sure you are using GCC trunk r276711 or later? (See GCC bug
92014.)
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>From glibc-bugs-return-46380-listarch-glibc-bugs=sources.redhat.com@sourceware.org Tue Oct 08 22:51:10 2019
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From: "danglin at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug time/25085] zic.c:1369:23: error: writing 4 bytes into a region of size 1
Date: Tue, 08 Oct 2019 22:51:00 -0000
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--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
I suspect this is resolved by Martin's fix for 92014. My last gcc build was
with trunk revision 276654.
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>From glibc-bugs-return-46381-listarch-glibc-bugs=sources.redhat.com@sourceware.org Wed Oct 09 15:45:02 2019
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From: "schwab@linux-m68k.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/25087] New: ldconfig mishandles unusual .dynstr placement
Date: Wed, 09 Oct 2019 15:45:00 -0000
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Bug ID: 25087
Summary: ldconfig mishandles unusual .dynstr placement
Product: glibc
Version: 2.30
Status: NEW
Severity: normal
Priority: P2
Component: dynamic-link
Assignee: unassigned at sourceware dot org
Reporter: schwab@linux-m68k.org
Target Milestone: ---
This library is mishandled by ldconfig, because .dynstr is located in a
separate LOAD segment, with a load offset different from the first LOAD
segment:
Elf file type is DYN (Shared object file)
Entry point 0x2280
There are 10 program headers, starting at offset 241664
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
LOAD 0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000001a68 0x0000000000001a68 R 0x1000
GNU_STACK 0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 RW 0x10
NOTE 0x0000000000000238 0x0000000000000238 0x0000000000000238
0x0000000000000024 0x0000000000000024 R 0x4
LOAD 0x0000000000002000 0x0000000000002000 0x0000000000002000
0x0000000000001201 0x0000000000001201 R E 0x1000
LOAD 0x0000000000004000 0x0000000000004000 0x0000000000004000
0x0000000000000eb8 0x0000000000000eb8 R 0x1000
GNU_EH_FRAME 0x00000000000048d8 0x00000000000048d8 0x00000000000048d8
0x0000000000000134 0x0000000000000134 R 0x4
LOAD 0x0000000000005c68 0x0000000000006c68 0x0000000000006c68
0x00000000000003e8 0x0000000000000408 RW 0x1000
GNU_RELRO 0x0000000000005c68 0x0000000000006c68 0x0000000000006c68
0x0000000000000398 0x0000000000000398 R 0x1
LOAD 0x000000000003b000 0x0000000000008000 0x0000000000008000
0x0000000000000e80 0x0000000000000e80 RW 0x1000
DYNAMIC 0x000000000003b230 0x0000000000008230 0x0000000000008230
0x0000000000000220 0x0000000000000220 RW 0x8
Section to Segment mapping:
Segment Sections...
00 .note.gnu.build-id .hash .gnu.hash .dynsym .gnu.version
.gnu.version_r .rela.dyn .rela.plt
01
02 .note.gnu.build-id
03 .init .plt .plt.got .text .fini
04 .rodata .eh_frame_hdr .eh_frame
05 .eh_frame_hdr
06 .init_array .fini_array .got .data .bss
07 .init_array .fini_array .got
08 .dynamic .dynstr
09 .dynamic
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>From glibc-bugs-return-46382-listarch-glibc-bugs=sources.redhat.com@sourceware.org Wed Oct 09 23:43:24 2019
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From: "tg at mirbsd dot de" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/25093] New: sparc64 sigsetjmp buffer size mismatch
Date: Wed, 09 Oct 2019 23:43:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=25093
Bug ID: 25093
Summary: sparc64 sigsetjmp buffer size mismatch
Product: glibc
Version: 2.32
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: tg at mirbsd dot de
CC: drepper.fsp at gmail dot com
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Created attachment 12036
--> https://sourceware.org/bugzilla/attachment.cgi?id=12036&action=edit
patch
While reviewing a bug in µClibc-ng, which uses the same sigsetjmp structure as
glibc but actually uses the __mask_was_saved member during siglongjmp, I found
that said member was at offset 496, not 512 as expected (and therefore, the
structure was too short).
Looking at what it does, it calls the getcontext syscall, and the kernel side
of the structure has one more member in the FPU registers (which doesn’t exist
on sparc32 apparently and maybe therefore was missed?).
Adding the missing FPU member (patch attached) makes the offsetof the
__mask_was_saved member jump to 512 (at least in µClibc-ng, didn’t check
glibc).
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>From glibc-bugs-return-46383-listarch-glibc-bugs=sources.redhat.com@sourceware.org Thu Oct 10 10:06:59 2019
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From: "konrad.schwarz at siemens dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/25094] New: A successful dlclose() seems to clear the last dynamic link error
Date: Thu, 10 Oct 2019 10:06:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=25094
Bug ID: 25094
Summary: A successful dlclose() seems to clear the last dynamic
link error
Product: glibc
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: konrad.schwarz at siemens dot com
CC: drepper.fsp at gmail dot com
Target Milestone: ---
https://pubs.opengroup.org/onlinepubs/9699919799.2008edition/functions/dlerror.html
states that dlerror() shall return a string that
"describes the last error that occurred during dynamic linking processing."
This would make the following code valid, assuming symbol_table is the
result of a successful dlopen():
if (!dlsym (symbol_table, "bogus_function_name")) {
dlclose (symbol_table);
return dlerror ();
}
However, a null string is returned to the invoker.
The spec goes on to say that:
If no dynamic linking errors have occurred since the last invocation of
dlerror(), dlerror() shall return NULL. Thus, invoking dlerror() a second
time, immediately following a prior invocation, shall result in NULL being
returned.
However, that case does not apply to the code above.
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>From glibc-bugs-return-46384-listarch-glibc-bugs=sources.redhat.com@sourceware.org Thu Oct 10 10:25:06 2019
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From: "schwab@linux-m68k.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/25094] A successful dlclose() seems to clear the last dynamic link error
Date: Thu, 10 Oct 2019 10:25:00 -0000
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
dlclose is another use of "dynamic linking processing", and therefore affects
the value returned by dlerror.
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>From glibc-bugs-return-46385-listarch-glibc-bugs=sources.redhat.com@sourceware.org Thu Oct 10 10:44:33 2019
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From: "konrad.schwarz at siemens dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/25094] A successful dlclose() seems to clear the last dynamic link error
Date: Thu, 10 Oct 2019 10:44:00 -0000
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--- Comment #2 from Konrad Schwarz <konrad.schwarz at siemens dot com> ---
Wording in POSIX contradicts above comment.
If dlclose() (or any other dynamic linking function) were allowed
to reset the dynamic linking error indication, the wording would
be along the lines
"describes the last result that occurred during dynamic linking
processing, a null pointer if no error occurred".
The actual wording requires behavior similar to errno,
which is modified *only* when an error occurs --
and the application is required to reset errno to zero
to detect error in some cases.
Please reopen.
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>From glibc-bugs-return-46386-listarch-glibc-bugs=sources.redhat.com@sourceware.org Thu Oct 10 20:38:13 2019
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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/18231] ipc_perm struct's mode member has wrong type in sys/ipc.h
Date: Thu, 10 Oct 2019 20:38:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=18231
--- Comment #6 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Adhemerval Zanella
<azanella@sourceware.org>:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2f959dfe849e0646e27403f2e4091536496ac0f0
commit 2f959dfe849e0646e27403f2e4091536496ac0f0
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Thu Oct 10 18:13:11 2019 +0000
sysvipc: Set ipc_perm mode as mode_t (BZ#18231)
This patch sets the mode field in ipc_perm as mode_t for all architectures,
as POSIX specification [1]. The changes required are as follow:
1. It moves the ipc_perm definition out of ipc.h to its own header
ipc_perm.h. It also allows consolidate the IPC_* definition on
only one header.
2. The generic implementation follow the kernel ipc64_perm size so the
syscall can be made directly without temporary buffer copy. However,
since glibc defines the MODE field as mode_t, it omits the __PAD1
field
(since glibc does not export mode_t as 16-bit for any architecture).
It is a two-fold improvement:
2.1. New implementation which follow Linux UAPI will not need to
provide an arch-specific ipc-perm.h header neither wrongly
use the wrong 16-bit definition from previous default ipc.h
(as csky did).
2.1. It allows consolidate ipc_perm definition for architectures that
already provide mode_t as 32-bit.
3. All kernel ABIs for the supported architectures already provides the
expected padding for mode type extension to 32-bit. However, some
architectures the padding has the wrong placement, so it requires
the ipc control routines (msgctl, semctl, and shmctl) to adjust the
mode field accordingly. Currently they are armeb, microblaze, m68k,
s390, and sheb.
A new assume is added, __ASSUME_SYSVIPC_BROKEN_MODE_T, which the
required ABIs define.
4. For the ABIs that define __ASSUME_SYSVIPC_BROKEN_MODE_T, it also
require compat symbols that do not adjust the mode field.
Checked on arm-linux-gnueabihf, aarch64-linux-gnu, powerpc64le-linux-gnu,
and x86_64-linux-gnu. I also checked the sysvipc tests on hppa-linux-gnu,
sh4-linux-gnu, s390x-linux-gnu, and s390-linux-gnu.
I also did a sanity test against armeb qemu usermode for the sysvipc
tests.
[BZ #18231]
* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
bits/ipc-perm.h.
* sysdeps/unix/sysv/linux/aarch64/bits/ipc.h: Remove file.
* sysdeps/unix/sysv/linux/alpha/bits/ipc.h: Likewise.
* sysdeps/unix/sysv/linux/hppa/bits/ipc.h: Likewise.
* sysdeps/unix/sysv/linux/ia64/bits/ipc.h: Likewise.
* sysdeps/unix/sysv/linux/mips/bits/ipc.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/ipc.h: Likewise.
* sysdeps/unix/sysv/linux/s390/bits/ipc.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/ipc.h: Likewise.
* sysdeps/unix/sysv/linux/arm/kernel-features.h
[__BYTE_ORDER == __BIG_ENDIAN] (__ASSUME_SYSVIPC_BROKEN_MODE_T):
Define.
* sysdeps/sysv/linux/microblaze/kernel-features.h: Likewise.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
[!__s390x__] (__ASSUME_SYSVIPC_BROKEN_MODE_T): Define.
* sysdeps/unix/sysv/linux/sh/kernel-features.h
(__ASSUME_SYSVIPC_BROKEN_MODE_T): Define.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h: Likewise.
* sysdeps/unix/sysv/linux/bits/ipc-perm.h: New file.
* sysdeps/unix/sysv/linux/powerpc/bits/ipc-perm.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/ipc-perm.h: Likewise.
* sysdeps/unix/sysv/linux/bits/ipc.h (ipc_perm): Move to
bits/ipc-perm.h.
* sysdeps/unix/sysv/linux/hppa/bits/ipc-perm.h: New file.
* sysdeps/unix/sysv/linux/kernel-features.h: Add comment about
__ASSUME_SYSVIPC_BROKEN_MODE_T semantic.
* sysdeps/unix/sysv/linux/msgctl.c (DEFAULT_VERSION): Define as
2.31 if __ASSUME_SYSVIPC_BROKEN_MODE_T is defined.
(msgctl_syscall, __msgctl_mode16): New symbol.
(__new_msgctl): Add bits for __ASSUME_SYSVIPC_BROKEN_MODE_T.
* sysdeps/unix/sysv/linux/semctl.c: Likewise.
* sysdeps/unix/sysv/linux/shmctl.c: Likewise.
* sysdeps/unix/sysv/linux/arm/be/libc.abilist (GLIBC_2.31): Add
msgctl, semctl, and shmctl.
* sysdeps/sysv/linux/microblaze/be/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sh/be/libc.abilist: Likewise.
* conform/data/sys/ipc.h-data: Only xfail {struct ipc_perm} mode_t
mode for Hurd.
* sysdeps/unix/sysv/linux/m68k/Versions (libc) [GLIBC_2.31]: Add
msgctl, semctl, and shmctl.
* sysdeps/unix/sysv/linux/arm/be/Versions: New file.
* sysdeps/unix/sysv/linux/microblaze/be/Versions: Likewise.
* sysdeps/unix/sysv/linux/sh/be/Versions: Likewise.
[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_ipc.h.html
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From: "adhemerval.zanella at linaro dot org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/18231] ipc_perm struct's mode member has wrong type in sys/ipc.h
Date: Thu, 10 Oct 2019 20:38:00 -0000
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Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |2.31
--- Comment #7 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
Fixed on 2.31 (2f959dfe849e0646e27403f2e4091536496ac0f0).
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From: "msebor at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug build/25097] new -Warray-bounds with GCC 10
Date: Thu, 10 Oct 2019 23:01:00 -0000
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Martin Sebor <msebor at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |carlos at redhat dot com
Component|nptl |build
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Subject: [Bug nptl/25097] New: new -Warray-bounds with GCC 10
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https://sourceware.org/bugzilla/show_bug.cgi?id=25097
Bug ID: 25097
Summary: new -Warray-bounds with GCC 10
Product: glibc
Version: unspecified
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Severity: normal
Priority: P2
Component: nptl
Assignee: unassigned at sourceware dot org
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CC: drepper.fsp at gmail dot com
Target Milestone: ---
Testing a GCC 10 -Warray-bounds enhancement triggers a bunch of warnings in
Glibc for accesses to interior zero-length array members. As best I can tell
the warnings are correct -- they all point out out-of-bounds accesses to these
arrays -- but the Glibc code that triggers them seems to be written that way by
design. It uses one member array to access another that follows it in the
structure layout. This works in simple cases but it's not guaranteed to work
in others as GCC doesn't always avoid assuming that zero-length arrays don't
alias subsequent members.
The -Warray-bounds instances are these:
fileops.c:337
fileops.c:338
fileops.c:339
fileops.c:340
iofwide.c:177
iofwide.c:178
iofwide.c:179
iofwide.c:193
iofwide.c:244
iofwide.c:245
iofwide.c:246
iofwide.c:86
iofwide.c:87
iofwide.c:88
iofwide.c:89
libc-tls.c:209
rtld.c:1016
The detailed warnings are below. Unless the code can be changed to avoid this
type of "misuse" I think the best approach is to suppress the warnings via
#pragma GCC diagnostic ignored before each access. The GCC enhancement is
still under review so this is an early heads up that it may be coming.
libc-tls.c:209:30: warning: array subscript 0 is above array bounds of ‘struct
dtv_slotinfo[]’ [-Warray-bounds]
209 | static_slotinfo.si.slotinfo[1].map = main_map;
In file included from ../sysdeps/x86/ldsodefs.h:64,
from ../sysdeps/gnu/ldsodefs.h:46,
from ../sysdeps/unix/sysv/linux/ldsodefs.h:25,
from libc-tls.c:21:
../sysdeps/generic/ldsodefs.h:423:7: note: while referencing ‘slotinfo’
423 | } slotinfo[0];
iofwide.c:86:25: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
86 | cc->__cd_in.__cd.__data[0].__invocation_counter = 0;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:87:25: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
87 | cc->__cd_in.__cd.__data[0].__internal_use = 1;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:88:25: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
88 | cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:89:25: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
89 | cc->__cd_in.__cd.__data[0].__statep = &fp->_wide_data->_IO_state;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:177:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
177 | codecvt->__cd_in.__cd.__data[0].__outbuf = (unsigned char *)
to_start;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:178:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
178 | codecvt->__cd_in.__cd.__data[0].__outbufend = (unsigned char *)
to_end;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:179:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
179 | codecvt->__cd_in.__cd.__data[0].__statep = statep;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:193:54: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
193 | *to_stop = (wchar_t *) codecvt->__cd_in.__cd.__data[0].__outbuf;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:244:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
244 | codecvt->__cd_in.__cd.__data[0].__outbuf = (unsigned char *) to_buf;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:245:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
245 | codecvt->__cd_in.__cd.__data[0].__outbufend = (unsigned char *)
&to_buf[max];
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:246:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
246 | codecvt->__cd_in.__cd.__data[0].__statep = statep;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:86:25: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
86 | cc->__cd_in.__cd.__data[0].__invocation_counter = 0;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:87:25: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
87 | cc->__cd_in.__cd.__data[0].__internal_use = 1;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:88:25: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
88 | cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:89:25: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
89 | cc->__cd_in.__cd.__data[0].__statep = &fp->_wide_data->_IO_state;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:177:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
177 | codecvt->__cd_in.__cd.__data[0].__outbuf = (unsigned char *)
to_start;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:178:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
178 | codecvt->__cd_in.__cd.__data[0].__outbufend = (unsigned char *)
to_end;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:179:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
179 | codecvt->__cd_in.__cd.__data[0].__statep = statep;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:193:54: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
193 | *to_stop = (wchar_t *) codecvt->__cd_in.__cd.__data[0].__outbuf;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:244:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
244 | codecvt->__cd_in.__cd.__data[0].__outbuf = (unsigned char *) to_buf;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:245:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
245 | codecvt->__cd_in.__cd.__data[0].__outbufend = (unsigned char *)
&to_buf[max];
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
iofwide.c:246:31: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
246 | codecvt->__cd_in.__cd.__data[0].__statep = statep;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from ../libio/libioP.h:45,
from iofwide.c:27:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
fileops.c:337:27: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
337 | cc->__cd_in.__cd.__data[0].__invocation_counter = 0;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from libioP.h:45,
from fileops.c:29:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
fileops.c:338:27: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
338 | cc->__cd_in.__cd.__data[0].__internal_use = 1;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from libioP.h:45,
from fileops.c:29:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
fileops.c:339:27: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
339 | cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from libioP.h:45,
from fileops.c:29:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
fileops.c:340:27: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from libioP.h:45,
from fileops.c:29:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
fileops.c:337:27: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
337 | cc->__cd_in.__cd.__data[0].__invocation_counter = 0;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from libioP.h:45,
from fileops.c:29:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
fileops.c:338:27: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
338 | cc->__cd_in.__cd.__data[0].__internal_use = 1;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from libioP.h:45,
from fileops.c:29:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
fileops.c:339:27: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
339 | cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST;
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from libioP.h:45,
from fileops.c:29:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
fileops.c:340:27: warning: array subscript 0 is above array bounds of ‘struct
__gconv_step_data[]’ [-Warray-bounds]
In file included from ../include/gconv.h:1,
from ../libio/libio.h:49,
from ../include/stdio.h:8,
from libioP.h:45,
from fileops.c:29:
../iconv/gconv.h:144:42: note: while referencing ‘__data’
144 | __extension__ struct __gconv_step_data __data[0];
-Wl,--verbose 2>&1 | \
rtld.c:1016:27: warning: array subscript 0 is above array bounds of ‘struct
auditstate[]’ [-Warray-bounds]
1016 | GL(dl_rtld_map).l_audit[cnt].cookie = (intptr_t) &GL(dl_rtld_map);
In file included from ../include/dlfcn.h:4,
from rtld.c:20:
../include/link.h:335:7: note: while referencing ‘l_audit’
335 | } l_audit[0];
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>From glibc-bugs-return-46390-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 11 11:19:46 2019
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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug nptl/25098] New: nptl: ctype classification functions are not AS-Safe
Date: Fri, 11 Oct 2019 11:19:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=25098
Bug ID: 25098
Summary: nptl: ctype classification functions are not AS-Safe
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: nptl
Assignee: unassigned at sourceware dot org
Reporter: fweimer at redhat dot com
CC: drepper.fsp at gmail dot com
Target Milestone: ---
Flags: security-
A signal can arrive on a new thread before __ctype_init has completed on that
thread.
Pointed out by Mathieu Desnoyers as part of the rseq work.
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>From glibc-bugs-return-46391-listarch-glibc-bugs=sources.redhat.com@sourceware.org Fri Oct 11 18:21:38 2019
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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug nptl/25098] nptl: ctype classification functions are not AS-Safe
Date: Fri, 11 Oct 2019 18:21:00 -0000
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Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at sourceware dot org |fweimer at redhat dot com
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>From glibc-bugs-return-46392-listarch-glibc-bugs=sources.redhat.com@sourceware.org Sat Oct 12 03:00:34 2019
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From: "dj at redhat dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug nscd/24949] High CPU load by nscd service
Date: Sat, 12 Oct 2019 03:00:00 -0000
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--- Comment #2 from dj at redhat dot com <dj at redhat dot com> ---
I've been trying unsuccessfully to reproduce this. Could you attach the
relevent nsswitch.conf and nscd.conf files? Also, if you could run nscd with
"-d" and capture the output thereof, and attach that too?
Thanks!
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