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* [Bug stdio/18906] New: fopen: ccs value may affect open mode
@ 2015-09-01 14:24 valery_reznic at yahoo dot com
  2015-09-04  9:48 ` [Bug stdio/18906] " fweimer at redhat dot com
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: valery_reznic at yahoo dot com @ 2015-09-01 14:24 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=18906

            Bug ID: 18906
           Summary: fopen: ccs value may affect open mode
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: stdio
          Assignee: unassigned at sourceware dot org
          Reporter: valery_reznic at yahoo dot com
  Target Milestone: ---

Created attachment 8569
  --> https://sourceware.org/bugzilla/attachment.cgi?id=8569&action=edit
test program to demonstrate the problem

I fopen mode looks like
"r,ccs=+..."
"r,ccs=x..."
"r,ccs=e..."

Then first symbol from the ccs value will affect open flags.
For example, if mode = "r,ccs=+" then file will be opened with O_RDWR instead
of
O_RDONLY


Here the starce output:

execve("./fopen_test", ["./fopen_test"], [/* 52 vars */]) = 0
brk(0)                                  = 0xb10000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f51bf48b000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=143162, ...}) = 0
mmap(NULL, 143162, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f51bf468000
close(3)                                = 0
open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p\36\302\2026\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2096496, ...}) = 0
mmap(0x3682c00000, 3920480, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x3682c00000
mprotect(0x3682db4000, 2093056, PROT_NONE) = 0
mmap(0x3682fb3000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b3000) = 0x3682fb3000
mmap(0x3682fb9000, 16992, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3682fb9000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f51bf467000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f51bf465000
arch_prctl(ARCH_SET_FS, 0x7f51bf465740) = 0
mprotect(0x3682fb3000, 16384, PROT_READ) = 0
mprotect(0x600000, 4096, PROT_READ)     = 0
mprotect(0x3682a1f000, 4096, PROT_READ) = 0
munmap(0x7f51bf468000, 143162)          = 0
brk(0)                                  = 0xb10000
brk(0xb31000)                           = 0xb31000
brk(0)                                  = 0xb31000
open("aaa", O_RDWR)                     = -1 ENOENT (No such file or directory)
exit_group(0)                           = ?
+++ exited with 0 +++

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* [Bug stdio/18906] fopen: ccs value may affect open mode
  2015-09-01 14:24 [Bug stdio/18906] New: fopen: ccs value may affect open mode valery_reznic at yahoo dot com
@ 2015-09-04  9:48 ` fweimer at redhat dot com
  2023-07-12 13:12 ` josimmon at redhat dot com
  2023-07-12 13:33 ` schwab@linux-m68k.org
  2 siblings, 0 replies; 4+ messages in thread
From: fweimer at redhat dot com @ 2015-09-04  9:48 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=18906

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fweimer at redhat dot com
              Flags|                            |security-

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* [Bug stdio/18906] fopen: ccs value may affect open mode
  2015-09-01 14:24 [Bug stdio/18906] New: fopen: ccs value may affect open mode valery_reznic at yahoo dot com
  2015-09-04  9:48 ` [Bug stdio/18906] " fweimer at redhat dot com
@ 2023-07-12 13:12 ` josimmon at redhat dot com
  2023-07-12 13:33 ` schwab@linux-m68k.org
  2 siblings, 0 replies; 4+ messages in thread
From: josimmon at redhat dot com @ 2023-07-12 13:12 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=18906

Joseph Simmons-Talbott <josimmon at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |josimmon at redhat dot com

--- Comment #1 from Joseph Simmons-Talbott <josimmon at redhat dot com> ---
This is fixed in 5324d258427fd11ca0f4f595c94016e568b26d6b

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* [Bug stdio/18906] fopen: ccs value may affect open mode
  2015-09-01 14:24 [Bug stdio/18906] New: fopen: ccs value may affect open mode valery_reznic at yahoo dot com
  2015-09-04  9:48 ` [Bug stdio/18906] " fweimer at redhat dot com
  2023-07-12 13:12 ` josimmon at redhat dot com
@ 2023-07-12 13:33 ` schwab@linux-m68k.org
  2 siblings, 0 replies; 4+ messages in thread
From: schwab@linux-m68k.org @ 2023-07-12 13:33 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=18906

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |2.38
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
Fixed.

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end of thread, other threads:[~2023-07-12 13:33 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-09-01 14:24 [Bug stdio/18906] New: fopen: ccs value may affect open mode valery_reznic at yahoo dot com
2015-09-04  9:48 ` [Bug stdio/18906] " fweimer at redhat dot com
2023-07-12 13:12 ` josimmon at redhat dot com
2023-07-12 13:33 ` schwab@linux-m68k.org

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