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authorAndrew Price <anprice@redhat.com>2012-10-12 16:45:09 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2012-11-07 09:40:39 +0000
commitcd0ed19fb614cb1315c0a510ec6c163d8324fd82 (patch)
tree18ce2f1cc49be6668439538a258270517b2ebb53 /fs/gfs2
parentaaaf68c5629108f6078ab458d34a661143ea6857 (diff)
GFS2: Fix possible null pointer deref in gfs2_rs_alloc
Despite the return value from kmem_cache_zalloc() being checked, the error wasn't being returned until after a possible null pointer dereference. This patch returns the error immediately, allowing the removal of the error variable. Signed-off-by: Andrew Price <anprice@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/rgrp.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 3cc402ce6fe..43d1a20bdbe 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -553,7 +553,6 @@ void gfs2_free_clones(struct gfs2_rgrpd *rgd)
*/
int gfs2_rs_alloc(struct gfs2_inode *ip)
{
- int error = 0;
struct gfs2_blkreserv *res;
if (ip->i_res)
@@ -561,7 +560,7 @@ int gfs2_rs_alloc(struct gfs2_inode *ip)
res = kmem_cache_zalloc(gfs2_rsrv_cachep, GFP_NOFS);
if (!res)
- error = -ENOMEM;
+ return -ENOMEM;
RB_CLEAR_NODE(&res->rs_node);
@@ -571,7 +570,7 @@ int gfs2_rs_alloc(struct gfs2_inode *ip)
else
ip->i_res = res;
up_write(&ip->i_rw_mutex);
- return error;
+ return 0;
}
static void dump_rs(struct seq_file *seq, const struct gfs2_blkreserv *rs)