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futex_unlock_pi() hurts my brain and may cause application deadlock 

Avoid futex_unlock_pi returning -EFAULT (which results in deadlock), by
clearing uval before jumping to retry_locked.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
john stultz 2007-08-22 14:01:10 -07:00 committed by Linus Torvalds
parent 42b88e6ad4
commit 187226f57f
1 changed files with 1 additions and 0 deletions
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1
kernel/futex.c
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@ -1670,6 +1670,7 @@ static int futex_unlock_pi(u32 __user *uaddr, struct rw_semaphore *fshared)
attempt); attempt);
if (ret) if (ret)
goto out; goto out;
uval = 0;
goto retry_unlocked; goto retry_unlocked;
} }