[Bug libc/17691] New: Segfault in libpthread-2.7.so at offset 0x356

["matthew.dahl at yahoo dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17691

            Bug ID: 17691
           Summary: Segfault in libpthread-2.7.so at offset 0x356
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: matthew.dahl at yahoo dot com
                CC: drepper.fsp at gmail dot com

I am a software engineer at an avionics company, we have a system in the field
that has on two occasions reported a segmentation fault during startup. Since
this system is in a flight configuration we do not have core dumps enabled nor
is any additional logging available.

The following line is from the syslog.all is all we have to go on currently:

Jan  6 08:15:36 <SYSTEM-NAME> kernel: <APP-NAME>[5220]: segfault at 0 ip
b7576356 sp bfad46f8 error 4 in libpthread-2.7.so[b756a000+15000]


>From our analysis it appears to died at offset 0x356 (b756a000 - bfad46f8) in
libpthread-2.7.so, which using objdump is in the __lll_robust_lock_wait
function at instruction (intel asm syntax)

c356:    81 ca 00 00 00 80        or     edx,0x80000000

We have been unable to re-produce this issue here in our lab and I have
exhausted all of my resources attempting to find a root cause.


System Info:
Intel(R) Core(TM)2 CPU L7400
Running Debian Kernel Version 2.6.32.8

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