linux-kernel - [PATCH 3.18 82/90] ext4: fix buffer leak in ext4_xattr_move_to

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Message-Id: <20181119162633.163963784@linuxfoundation.org>
Date:   Mon, 19 Nov 2018 17:30:04 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jan Kara <jack@...e.cz>,
        Vasily Averin <vvs@...tuozzo.com>,
        Theodore Tso <tytso@....edu>, stable@...nel.org
Subject: [PATCH 3.18 82/90] ext4: fix buffer leak in ext4_xattr_move_to_block() on error path

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vasily Averin <vvs@...tuozzo.com>

commit 6bdc9977fcdedf47118d2caf7270a19f4b6d8a8f upstream.

Fixes: 3f2571c1f91f ("ext4: factor out xattr moving")
Fixes: 6dd4ee7cab7e ("ext4: Expand extra_inodes space per ...")
Reviewed-by: Jan Kara <jack@...e.cz>
Signed-off-by: Vasily Averin <vvs@...tuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Cc: stable@...nel.org # 2.6.23
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ext4/xattr.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1489,6 +1489,8 @@ cleanup:
 	kfree(buffer);
 	if (is)
 		brelse(is->iloc.bh);
+	if (bs)
+		brelse(bs->bh);
 	kfree(is);
 	kfree(bs);
 	brelse(bh);