This is a note to let you know that I've just added the patch titled
mvsas: Fix NULL pointer dereference in mvs_slot_task_free
to the 4.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mvsas-fix-null-pointer-dereference-in-mvs_slot_task_free.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 2280521719e81919283b82902ac24058f87dfc1b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C4=81vis=20Mos=C4=81ns?= <[email protected]>
Date: Fri, 21 Aug 2015 07:29:22 +0300
Subject: mvsas: Fix NULL pointer dereference in mvs_slot_task_free
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From: =?UTF-8?q?D=C4=81vis=20Mos=C4=81ns?= <[email protected]>
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 <[email protected]>
Reviewed-by: Tomas Henzl <[email protected]>
Reviewed-by: Johannes Thumshirn <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/scsi/mvsas/mv_sas.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -887,6 +887,8 @@ static void mvs_slot_free(struct mvs_inf
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))
Patches currently in stable-queue which might be from [email protected] are
queue-4.2/mvsas-fix-null-pointer-dereference-in-mvs_slot_task_free.patch
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