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| author | Dāvis Mosāns <davispuh@gmail.com> | 2015-08-21 07:29:22 +0300 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-11-17 15:54:45 +0000 |
| commit | cc1875ecbc3c9fb2774097e03870280c91c1e0e1 (patch) | |
| tree | a20eb889143c9ff665aa472b3545240c1b63f899 | |
| parent | 965d8d1de4c6c0dddc2f031bd09d8415f0521f3f (diff) | |
| download | lwn-cc1875ecbc3c9fb2774097e03870280c91c1e0e1.tar.gz lwn-cc1875ecbc3c9fb2774097e03870280c91c1e0e1.zip | |
mvsas: Fix NULL pointer dereference in mvs_slot_task_free
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 <davispuh@gmail.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/scsi/mvsas/mv_sas.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index c6ad694e4942..28b105c348ad 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -991,6 +991,8 @@ 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)) |