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futex: pass nr_wake2 to futex_wake_op

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The fourth argument of sys_futex is ignored when op == FUTEX_WAKE_OP,
but futex_wake_op expects it as its nr_wake2 parameter.

The only user of this operation in glibc is always passing 1, so this
bug had no consequences so far.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ulrich Drepper <drepper@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andreas Schwab 2007-07-31 00:38:51 -07:00 committed by Linus Torvalds
parent c0f3358621
commit f54f098612
1 changed files with 3 additions and 1 deletions
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4
kernel/futex.c
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@ -2060,8 +2060,10 @@ asmlinkage long sys_futex(u32 __user *uaddr, int op, u32 val,
}
/*
* requeue parameter in 'utime' if cmd == FUTEX_REQUEUE.
* number of waiters to wake in 'utime' if cmd == FUTEX_WAKE_OP.
*/
if (cmd == FUTEX_REQUEUE || cmd == FUTEX_CMP_REQUEUE)
if (cmd == FUTEX_REQUEUE || cmd == FUTEX_CMP_REQUEUE ||
cmd == FUTEX_WAKE_OP)
val2 = (u32) (unsigned long) utime;
return do_futex(uaddr, op, val, tp, uaddr2, val2, val3);