From: Dāvis Mosāns <davis...@gmail.com> 3.4.112-rc1 review patch. If anyone has any objections, please let me know.
------------------ commit 2280521719e81919283b82902ac24058f87dfc1b upstream. 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 <davis...@gmail.com> Reviewed-by: Tomas Henzl <the...@redhat.com> Reviewed-by: Johannes Thumshirn <jthumsh...@suse.de> Signed-off-by: James Bottomley <jbottom...@odin.com> Signed-off-by: Zefan Li <lize...@huawei.com> --- drivers/scsi/mvsas/mv_sas.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index dbb8edf..06da698 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -984,6 +984,8 @@ static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc) static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task, struct mvs_slot_info *slot, u32 slot_idx) { + if (!slot) + return; if (!slot->task) return; if (!sas_protocol_ata(task->task_proto)) -- 1.9.1
