mvsas: Fix NULL pointer dereference in mvs_slot_task_free
authorDāvis Mosāns <davispuh@gmail.com>
Fri, 21 Aug 2015 04:29:22 +0000 (07:29 +0300)
committerJames Bottomley <JBottomley@Odin.com>
Tue, 27 Oct 2015 02:21:07 +0000 (11:21 +0900)
commit2280521719e81919283b82902ac24058f87dfc1b
treebfa86dcd8d90eaad8596ce325a9dd2c36d5ef37b
parent15e3d5a285ab9283136dba34bbf72886d9146706
mvsas: Fix NULL pointer dereference in mvs_slot_task_free

When pci_pool_alloc fails in mvs_task_prep then task->lldd_task stays
NULL but it's later used in mvs_abort_task as slot which is passed
to mvs_slot_task_free causing NULL pointer dereference.

Just return from mvs_slot_task_free when passed with NULL slot.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=101891
Signed-off-by: Dāvis Mosāns <davispuh@gmail.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Odin.com>
drivers/scsi/mvsas/mv_sas.c