linux-kernel - [PATCH 3.18 81/90] ext4: release bs.bh before re-using in ext4_xattr_block

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Message-Id: <20181119162633.031695936@linuxfoundation.org>
Date:   Mon, 19 Nov 2018 17:30:03 +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, Vasily Averin <vvs@...tuozzo.com>,
        Theodore Tso <tytso@....edu>, stable@...nel.org
Subject: [PATCH 3.18 81/90] ext4: release bs.bh before re-using in ext4_xattr_block_find()

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

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

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

commit 45ae932d246f721e6584430017176cbcadfde610 upstream.

bs.bh was taken in previous ext4_xattr_block_find() call,
it should be released before re-using

Fixes: 7e01c8e5420b ("ext3/4: fix uninitialized bs in ...")
Signed-off-by: Vasily Averin <vvs@...tuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Cc: stable@...nel.org # 2.6.26
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
@@ -1162,6 +1162,8 @@ ext4_xattr_set_handle(handle_t *handle,
 			error = ext4_xattr_block_set(handle, inode, &i, &bs);
 		} else if (error == -ENOSPC) {
 			if (EXT4_I(inode)->i_file_acl && !bs.s.base) {
+				brelse(bs.bh);
+				bs.bh = NULL;
 				error = ext4_xattr_block_find(inode, &i, &bs);
 				if (error)
 					goto cleanup;