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From: Allison Collins <allison.henderson@oracle.com>
To: linux-xfs@vger.kernel.org
Subject: [PATCH v2 1/1] xfs: Fix Smatch warning in xfs_attr_node_get
Date: Tue, 28 Jul 2020 21:37:47 -0700
Message-ID: <20200729043747.11164-1-allison.henderson@oracle.com> (raw)

Fix warning: variable dereferenced before check 'state' in
xfs_attr_node_get.  If xfs_attr_node_hasname fails, it may return a null
state.  If state is null, do not release paths or derefrence state

Signed-off-by: Allison Collins <allison.henderson@oracle.com>
---
 fs/xfs/libxfs/xfs_attr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index e5ec9ed..38fe0d3 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -1422,7 +1422,7 @@ xfs_attr_node_get(
 	 * If not in a transaction, we have to release all the buffers.
 	 */
 out_release:
-	for (i = 0; i < state->path.active; i++) {
+	for (i = 0; i < state && state->path.active; i++) {
 		xfs_trans_brelse(args->trans, state->path.blk[i].bp);
 		state->path.blk[i].bp = NULL;
 	}
-- 
2.7.4


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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-29  4:37 Allison Collins [this message]
2020-07-29 19:59 ` Darrick J. Wong
2020-07-29 20:02   ` Allison Collins

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