linux-kernel - [PATCH stable-27 2/2] relay: fix lock imbalance in relay_late_setup

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Message-Id: <1233165221-20106-2-git-send-email-jslaby@suse.cz>
Date:	Wed, 28 Jan 2009 18:53:38 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	greg@...ah.com
Cc:	chrisw@...s-sol.org, stable@...nel.org,
	linux-kernel@...r.kernel.org, Jiri Slaby <jirislaby@...il.com>,
	Ingo Molnar <mingo@...e.hu>
Subject: [PATCH stable-27 2/2] relay: fix lock imbalance in relay_late_setup_files

From: Jiri Slaby <jirislaby@...il.com>

One fail path in relay_late_setup_files() omits
mutex_unlock(&relay_channels_mutex);
Add it.

Commit b786c6a98ef6fa81114ba7b9fbfc0d67060775e3.

Signed-off-by: Jiri Slaby <jirislaby@...il.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/relay.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/kernel/relay.c b/kernel/relay.c
index 8d13a78..b0bbf6f 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -664,8 +664,10 @@ int relay_late_setup_files(struct rchan *chan,
 
 	mutex_lock(&relay_channels_mutex);
 	/* Is chan already set up? */
-	if (unlikely(chan->has_base_filename))
+	if (unlikely(chan->has_base_filename)) {
+		mutex_unlock(&relay_channels_mutex);
 		return -EEXIST;
+	}
 	chan->has_base_filename = 1;
 	chan->parent = parent;
 	curr_cpu = get_cpu();
-- 
1.6.1

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