linux-kernel - [PATCH] dm-ioctl: Don't leak memory in target

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Message-ID: <alpine.LNX.2.00.1111062318090.5763@swampdragon.chaosbits.net>
Date:	Sun, 6 Nov 2011 23:20:14 +0100 (CET)
From:	Jesper Juhl <jj@...osbits.net>
To:	dm-devel@...hat.com, linux-raid@...r.kernel.org,
	linux-kernel@...r.kernel.org
cc:	Neil Brown <neilb@...e.de>
Subject: [PATCH] dm-ioctl: Don't leak memory in target_message() if 'argc'
 is NULL

If 'argc' is NULL we'll jump to the 'out:' label, but this will leak
the memory that 'dm_split_args()' allocated for 'argv', so we should
be jumping to the 'out_argv:' label instead to free up that
memory. This patch does so.

Signed-off-by: Jesper Juhl <jj@...osbits.net>
---
 drivers/md/dm-ioctl.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

 note: compile tested only.

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 31c2dc2..1ce84ed 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1437,7 +1437,7 @@ static int target_message(struct dm_ioctl *param, size_t param_size)
 
 	if (!argc) {
 		DMWARN("Empty message received.");
-		goto out;
+		goto out_argv;
 	}
 
 	table = dm_get_live_table(md);
-- 
1.7.7.2


-- 
Jesper Juhl <jj@...osbits.net>       http://www.chaosbits.net/
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