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nptl: Preserve error in setxid thread broadcast in coredumps [BZ #22153]

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Peter Zelezny 2017-10-13 22:49:49 +02:00 committed by Florian Weimer
parent 8644588807
commit e4f530da0d
2 changed files with 13 additions and 2 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2017-10-13 Peter Zelezny <peter.zelezny@dektech.com.au>
[BZ #22153]
* nptl/allocatestack.c (__nptl_setxid_error): Preserve error code
in coredumps.
2017-10-13 James Clarke <jrtc27@jrtc27.com>
* sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_rela):

9
nptl/allocatestack.c
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@ -1105,8 +1105,13 @@ __nptl_setxid_error (struct xid_command *cmdp, int error)
if (olderror == error)
break;
if (olderror != -1)
/* Mismatch between current and previous results. */
abort ();
{
/* Mismatch between current and previous results. Save the
error value to memory so that is not clobbered by the
abort function and preserved in coredumps. */
volatile int xid_err __attribute__((unused)) = error;
abort ();
}
}
while (atomic_compare_and_exchange_bool_acq (&cmdp->error, error, -1));
}