bcache: check for allocation failures

There is a missing NULL check after the kzalloc().

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index dd3f00a42729..12a2c2846f99 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -232,6 +232,8 @@ STORE(__cached_dev)
                         bch_uuid_write(dc->disk.c);
                 }
                 env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL);
+                if (!env)
+                        return -ENOMEM;
                 add_uevent_var(env, "DRIVER=bcache");
                 add_uevent_var(env, "CACHED_UUID=%pU", dc->sb.uuid),
                 add_uevent_var(env, "CACHED_LABEL=%s", buf);