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commit 217a74a85cdd60df236c296ad88142b78d35eccf
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Author: Andreas Schwab <schwab@suse.de>
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Date: Mon Dec 8 15:13:38 2014 +0100
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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
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touched by internal code.
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--- glibc-2.17-c758a686/nptl/sysdeps/unix/sysv/linux/fork.c
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+++ glibc-2.17-c758a686/nptl/sysdeps/unix/sysv/linux/fork.c
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@@ -45,7 +45,8 @@
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_IO_ITER i;
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for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i))
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- _IO_lock_init (*((_IO_lock_t *) _IO_iter_file(i)->_lock));
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+ if ((_IO_iter_file (i)->_flags & _IO_USER_LOCK) == 0)
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+ _IO_lock_init (*((_IO_lock_t *) _IO_iter_file(i)->_lock));
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}
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