linux-kernel - [GIT pull] futex fix for 3.17

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Message-ID: <alpine.DEB.2.10.1409132243220.23397@nanos>
Date:	Sat, 13 Sep 2014 22:48:27 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [GIT pull] futex fix for 3.17

Linus,

please pull the latest locking-urgent-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-urgent-for-linus

A oneliner bugfix for the jinxed futex code:

- Drop has bucket lock in the error exit path. I really could slap
  myself for intruducing that bug while fixing all the other horror in
  that code three month ago ...

Thanks,

	tglx

------------------>
Thomas Gleixner (1):
      futex: Unlock hb->lock in futex_wait_requeue_pi() error path


 kernel/futex.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/futex.c b/kernel/futex.c
index d3a9d946d0b7..815d7af2ffe8 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -2592,6 +2592,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
 	 * shared futexes. We need to compare the keys:
 	 */
 	if (match_futex(&q.key, &key2)) {
+		queue_unlock(hb);
 		ret = -EINVAL;
 		goto out_put_keys;
 	}
--
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