linux-kernel - [PATCH 1/1] relay: fix lock imbalance in relay_late_setup

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Date:	Sat, 17 Jan 2009 12:04:36 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	axboe@...nel.dk
Cc:	linux-kernel@...r.kernel.org, Jiri Slaby <jirislaby@...il.com>,
	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>,
	Jens Axboe <axboe@...e.de>
Subject: [PATCH 1/1] relay: fix lock imbalance in relay_late_setup_files

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

Signed-off-by: Jiri Slaby <jirislaby@...il.com>
Cc: Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
Cc: Jens Axboe <axboe@...e.de>
---
 kernel/relay.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/kernel/relay.c b/kernel/relay.c
index 8ca1587..738bc85 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -714,8 +714,10 @@ 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
caught by stanse
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