linux-kernel - [PATCH] xfs:xfs_dir2_node.c: pointer use before check for null

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Message-Id: <1382427375-8863-1-git-send-email-yefremov.denis@gmail.com>
Date:	Tue, 22 Oct 2013 11:36:15 +0400
From:	Denis Efremov <yefremov.denis@...il.com>
To:	Ben Myers <bpm@....com>
Cc:	Denis Efremov <yefremov.denis@...il.com>,
	Alex Elder <elder@...nel.org>, xfs@....sgi.com,
	linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: [PATCH] xfs:xfs_dir2_node.c: pointer use before check for null

Reorder of assert and args pointer dereference.

Found by Linux Driver Verification project (linuxtesting.org) -
PVS-Studio analyzer.

Signed-off-by: Denis Efremov <yefremov.denis@...il.com>
---
 fs/xfs/xfs_dir2_node.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c
index 4c3dba7..0ba7382 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/xfs_dir2_node.c
@@ -1365,8 +1365,8 @@ xfs_dir2_leafn_split(
 	 * Allocate space for a new leaf node.
 	 */
 	args = state->args;
-	mp = args->dp->i_mount;
 	ASSERT(args != NULL);
+	mp = args->dp->i_mount;
 	ASSERT(oldblk->magic == XFS_DIR2_LEAFN_MAGIC);
 	error = xfs_da_grow_inode(args, &blkno);
 	if (error) {
-- 
1.8.3.1

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