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authorTorvald Riegel <triegel@redhat.com>2016-12-21 13:37:19 +0100
committerTorvald Riegel <triegel@redhat.com>2017-01-13 17:17:38 +0100
commit8e31cafb268938729a1314806a924d73fb1991c5 (patch)
treed58fa0d10a2a6eff2e8f3a5a775fa4fa1abdf271 /nptl/pthread_mutex_timedlock.c
parent65810f0ef05e8c9e333f17a44e77808b163ca298 (diff)
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Clear list of acquired robust mutexes in the child process after forking.
Robust mutexes acquired at the time of a call to fork() do not remain
acquired by the forked child process.  We have to clear the list of
acquired robust mutexes before registering this list with the kernel;
otherwise, if some of the robust mutexes are process-shared, the parent
process can alter the child's robust mutex list, which can lead to
deadlocks or even modification of memory that may not be occupied by a
mutex anymore.

	[BZ #19402]
	* sysdeps/nptl/fork.c (__libc_fork): Clear list of acquired robust
	mutexes.
Diffstat (limited to 'nptl/pthread_mutex_timedlock.c')
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