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Don't touch user-controlled stdio locks in forked child (bug 12847)

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The stdio locks for streams with the _IO_USER_LOCK flag should not be
touched by internal code.
This commit is contained in:
Andreas Schwab 2014-12-08 15:13:38 +01:00
parent aa76a5c701
commit 217a74a85c
2 changed files with 8 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2014-12-10 Andreas Schwab <schwab@suse.de>
[BZ #12847]
* sysdeps/nptl/fork.c (fresetlockfiles): Skip files with
user-controlled locks.
2014-12-10 Richard Earnshaw <rearnsha@arm.com> 2014-12-10 Richard Earnshaw <rearnsha@arm.com>
* sysdeps/aarch64/strchrnul.S (vrepmask): Use a call-clobbered * sysdeps/aarch64/strchrnul.S (vrepmask): Use a call-clobbered

3
sysdeps/nptl/fork.c
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@ -46,7 +46,8 @@ fresetlockfiles (void)
_IO_ITER i; _IO_ITER i;
for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i)) for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i))
_IO_lock_init (*((_IO_lock_t *) _IO_iter_file(i)->_lock)); if ((_IO_iter_file (i)->_flags & _IO_USER_LOCK) == 0)
_IO_lock_init (*((_IO_lock_t *) _IO_iter_file(i)->_lock));
} }