On 1/23/17, 8:34 AM, "Bart Van Assche" <bart.vanassche@xxxxxxxxxxx> wrote:
>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
>
>Fixes: 1535aa75a3d8 ("qla2xxx: fix invalid DMA access after command aborts in PCI device remove")
>Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
>Cc: Naresh Bannoth <nbannoth@xxxxxxxxxx>
>Cc: Mauricio Faria de Oliveira <mauricfo@xxxxxxxxxxxxxxxxxx>
>Cc: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
>Cc: <stable@xxxxxxxxxxxxxxx>
>---
> drivers/scsi/qla2xxx/qla_os.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
>index 0a000ecf0881..ae9c5a7b239a 100644
>--- a/drivers/scsi/qla2xxx/qla_os.c
>+++ b/drivers/scsi/qla2xxx/qla_os.c
>@@ -1600,6 +1600,7 @@ qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
> srb_t *sp;
> struct qla_hw_data *ha = vha->hw;
> struct req_que *req;
>+ struct scsi_cmnd *scmd;
>
> qlt_host_reset_handler(ha);
>
>@@ -1613,6 +1614,8 @@ qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
> for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) {
> sp = req->outstanding_cmds[cnt];
> if (sp) {
>+ scmd = GET_CMD_SP(sp);
>+
> /* Don't abort commands in adapter during EEH
> * recovery as it's not accessible/responding.
> */
>@@ -1624,7 +1627,8 @@ qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
> */
> sp_get(sp);
> spin_unlock_irqrestore(&ha->hardware_lock, flags);
>- qla2xxx_eh_abort(GET_CMD_SP(sp));
>+ if (scmd)
>+ qla2xxx_eh_abort(scmd);
> spin_lock_irqsave(&ha->hardware_lock, flags);
> }
> req->outstanding_cmds[cnt] = NULL;
>--
>2.11.0
>
Looks Good.
Acked-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
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