OBD_ALLOC_PTR(uuid) invokes kmalloc, which may return NULL. This fix adds a check before dereferencing such pointer. Signed-off-by: Kumar Amit Mehta <gmate.amit(a)gmail.com&gt; --- drivers/staging/lustre/lustre/obdclass/obd_mount.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/staging/lustre/lustre/obdclass/obd_mount.c b/drivers/staging/lustre/lustre/obdclass/obd_mount.c index 4f39cdee..3c0c910 100644 --- a/drivers/staging/lustre/lustre/obdclass/obd_mount.c +++ b/drivers/staging/lustre/lustre/obdclass/obd_mount.c @@ -376,6 +376,11 @@ int lustre_start_mgc(struct super_block *sb) /* Random uuid for MGC allows easier reconnects */ OBD_ALLOC_PTR(uuid); + if (!uuid) { + rc = -ENOMEM; + goto out_free; + } + ll_generate_random_uuid(uuidc); class_uuid_unparse(uuidc, uuid); -- 2.1.0