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 <stable@xxxxxxxxxxxxxxx> know about it. >From 2280521719e81919283b82902ac24058f87dfc1b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?D=C4=81vis=20Mos=C4=81ns?= <davispuh@xxxxxxxxx> Date: Fri, 21 Aug 2015 07:29:22 +0300 Subject: mvsas: Fix NULL pointer dereference in mvs_slot_task_free MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: =?UTF-8?q?D=C4=81vis=20Mos=C4=81ns?= <davispuh@xxxxxxxxx> 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@xxxxxxxxx> Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx> Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx> Signed-off-by: James Bottomley <JBottomley@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 davispuh@xxxxxxxxx are queue-4.2/mvsas-fix-null-pointer-dereference-in-mvs_slot_task_free.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html