[PATCH] gfs2: add error handling for kmem_cache_zalloc

[Zhouyang Jia]

When kmem_cache_zalloc fails, the lack of error-handling code may
cause unexpected results.

This patch adds error-handling code after calling kmem_cache_zalloc.

Signed-off-by: Zhouyang Jia <jiazhouyang09@xxxxxxxxx>
---
 fs/gfs2/trans.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index 064c9a0..da81eb4 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -130,6 +130,9 @@ static struct gfs2_bufdata *gfs2_alloc_bufdata(struct gfs2_glock *gl,
 	struct gfs2_bufdata *bd;
 
 	bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL);
+	if (!bd)
+		return NULL;
+
 	bd->bd_bh = bh;
 	bd->bd_gl = gl;
 	bd->bd_ops = lops;
-- 
2.7.4