[PATCH 1/7] GFS2: Fix an unchecked error from gfs2_rs_alloc

[Steven Whitehouse]

From: Andrew Price <anprice@xxxxxxxxxx>

Check the return value of gfs2_rs_alloc(ip) and avoid a possible null
pointer dereference.

Signed-off-by: Andrew Price <anprice@xxxxxxxxxx>
Signed-off-by: Steven Whitehouse <swhiteho@xxxxxxxxxx>

diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 40c4b0d..c5af8e1 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -497,8 +497,11 @@ int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
 	struct gfs2_quota_data **qd;
 	int error;
 
-	if (ip->i_res == NULL)
-		gfs2_rs_alloc(ip);
+	if (ip->i_res == NULL) {
+		error = gfs2_rs_alloc(ip);
+		if (error)
+			return error;
+	}
 
 	qd = ip->i_res->rs_qa_qd;
 
-- 
1.7.4

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