jfs: Add missing NULL pointer check in __get_metapage

alloc_metapage can return a NULL pointer so check for that.

Signed-off-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 1c4b9ad4d7ab..1a3b0cc22ad3 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -663,6 +663,8 @@ struct metapage *__get_metapage(struct inode *inode, unsigned long lblock,
         } else {
                 INCREMENT(mpStat.pagealloc);
                 mp = alloc_metapage(GFP_NOFS);
+                if (!mp)
+                        goto unlock;
                 mp->page = page;
                 mp->sb = inode->i_sb;
                 mp->flag = 0;