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authorOleg Nesterov <oleg@tv-sign.ru>2008-05-23 13:04:41 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-24 09:56:10 -0700
commitda7978b0348d497688541e2d2f5739aa2a2c334f (patch)
treef4f55bf4293ff203f598e7a57959da1c5a7ad295 /drivers/gpio
parentdfc7064500061677720fa26352963c772d3ebe6b (diff)
signals: fix sigqueue_free() vs __exit_signal() race
__exit_signal() does flush_sigqueue(tsk->pending) outside of ->siglock. This can race with another thread doing sigqueue_free(), we can free the same SIGQUEUE_PREALLOC sigqueue twice or corrupt the pending->list. Note that even sys_exit_group() can trigger this race, not only sys_timer_delete(). Move the callsite of flush_sigqueue(tsk->pending) under ->siglock. This patch doesn't touch flush_sigqueue(->shared_pending) below, it is called when there are no other threads which can play with signals, and sigqueue_free() can't be used outside of our thread group. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/gpio')
0 files changed, 0 insertions, 0 deletions