[Bug libc/13280] New: execve(2) does not honor sysconf(_SC_ARG_MAX) in some cases.

[Bug libc/13280] New: execve(2) does not honor sysconf(_SC_ARG_MAX) in some cases.

[sdrake at xnet dot co.nz]

http://sourceware.org/bugzilla/show_bug.cgi?id=13280

             Bug #: 13280
           Summary: execve(2) does not honor sysconf(_SC_ARG_MAX) in some
                    cases.
           Product: glibc
           Version: 2.13
            Status: NEW
          Severity: critical
          Priority: P2
         Component: libc
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: sdrake@xnet.co.nz
    Classification: Unclassified
              Host: x86_64-unknown-linux-gnu


Steven Drake <sdrake at xnet dot co.nz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |testsuite+

Created attachment 5974
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5974
test-skeleton.c based test case (causes execve to fail with E2BIG).

If execve is given an argv with a string that is larger than 131072
(coincidentally the ARG_MAX macro from linux/limits.h) but less than what
sysconf(_SC_ARG_MAX) return, execve fails with E2BIG.

This does not happen if the total length of the argv strings is greater
than ARG_MAX but each is shorter.

This is a problem if using "/bin/sh -c", i.e. system(3).

I'm not sure if this is a glibc or linux issue but I am reporting it here
anyway.

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[Bug libc/13280] execve(2) does not honor sysconf(_SC_ARG_MAX) in some cases.

[schwab@linux-m68k.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13280

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> 2011-10-11 08:51:48 UTC ---
execve is a plain system call.

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[Bug libc/13280] execve(2) does not honor sysconf(_SC_ARG_MAX) in some cases.

[carlos at systemhalted dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13280

Carlos O'Donell <carlos at systemhalted dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |testsuite
                 CC|                            |carlos at systemhalted dot
                   |                            |org
              Flags|testsuite+                  |

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[Bug libc/13280] execve(2) does not honor sysconf(_SC_ARG_MAX) in some cases.

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=13280

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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