[GFS2] Fix OOM error handling

Fix the OOM error handling in inode.c where it was possible for
a NULL pointer to be dereferenced.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 57c43ac47925..d470e5286ecd 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -157,6 +157,9 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum *inum,
         struct gfs2_glock *io_gl;
         int error;
 
+        if (!inode)
+                return ERR_PTR(-ENOBUFS);
+
         if (inode->i_state & I_NEW) {
                 struct gfs2_sbd *sdp = GFS2_SB(inode);
                 umode_t mode = DT2IF(type);