This is a note to let you know that I've just added the patch titled
scsi: qla2xxx: Avoid that issuing a LIP triggers a kernel crash
to the 4.9-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:
scsi-qla2xxx-avoid-that-issuing-a-lip-triggers-a-kernel-crash.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2780f3c8f0233de90b6b47a23fc422b7780c5436 Mon Sep 17 00:00:00 2001
From: Mauricio Faria de Oliveira <mauricfo@xxxxxxxxxxxxxxxxxx>
Date: Wed, 25 Jan 2017 22:07:06 -0200
Subject: scsi: qla2xxx: Avoid that issuing a LIP triggers a kernel crash
From: Mauricio Faria de Oliveira <mauricfo@xxxxxxxxxxxxxxxxxx>
commit 2780f3c8f0233de90b6b47a23fc422b7780c5436 upstream.
Avoid that issuing a LIP as follows:
find /sys -name 'issue_lip'|while read f; do echo 1 > $f; done
triggers the following:
BUG: unable to handle kernel NULL pointer dereference at (null)
Call Trace:
qla2x00_abort_all_cmds+0xed/0x140 [qla2xxx]
qla2x00_abort_isp_cleanup+0x1e3/0x280 [qla2xxx]
qla2x00_abort_isp+0xef/0x690 [qla2xxx]
qla2x00_do_dpc+0x36c/0x880 [qla2xxx]
kthread+0x10c/0x140
[mkp: consolidated Mauricio's and Bart's fixes]
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@xxxxxxxxxxxxxxxxxx>
Reported-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Fixes: 1535aa75a3d8 ("qla2xxx: fix invalid DMA access after command aborts in PCI device remove")
Cc: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/qla2xxx/qla_os.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -1459,7 +1459,7 @@ qla2x00_abort_all_cmds(scsi_qla_host_t *
/* Don't abort commands in adapter during EEH
* recovery as it's not accessible/responding.
*/
- if (!ha->flags.eeh_busy) {
+ if (GET_CMD_SP(sp) && !ha->flags.eeh_busy) {
/* Get a reference to the sp and drop the lock.
* The reference ensures this sp->done() call
* - and not the call in qla2xxx_eh_abort() -
Patches currently in stable-queue which might be from mauricfo@xxxxxxxxxxxxxxxxxx are
queue-4.9/scsi-qla2xxx-avoid-that-issuing-a-lip-triggers-a-kernel-crash.patch
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