scsi: qla2xxx: Fix crash when I/O abort times out
authorArun Easi <aeasi@marvell.com>
Tue, 29 Nov 2022 09:26:34 +0000 (01:26 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 31 Dec 2022 12:14:47 +0000 (13:14 +0100)
commitd3871af13aa03fbbe7fbb812eaf140501229a72e
treec57f00e88c7813405786ec6fa9da4c6835c83f70
parent50f993da945074b2a069da099a0331b23a0c89a0
scsi: qla2xxx: Fix crash when I/O abort times out

commit 68ad83188d782b2ecef2e41ac245d27e0710fe8e upstream.

While performing CPU hotplug, a crash with the following stack was seen:

Call Trace:
     qla24xx_process_response_queue+0x42a/0x970 [qla2xxx]
     qla2x00_start_nvme_mq+0x3a2/0x4b0 [qla2xxx]
     qla_nvme_post_cmd+0x166/0x240 [qla2xxx]
     nvme_fc_start_fcp_op.part.0+0x119/0x2e0 [nvme_fc]
     blk_mq_dispatch_rq_list+0x17b/0x610
     __blk_mq_sched_dispatch_requests+0xb0/0x140
     blk_mq_sched_dispatch_requests+0x30/0x60
     __blk_mq_run_hw_queue+0x35/0x90
     __blk_mq_delay_run_hw_queue+0x161/0x180
     blk_execute_rq+0xbe/0x160
     __nvme_submit_sync_cmd+0x16f/0x220 [nvme_core]
     nvmf_connect_admin_queue+0x11a/0x170 [nvme_fabrics]
     nvme_fc_create_association.cold+0x50/0x3dc [nvme_fc]
     nvme_fc_connect_ctrl_work+0x19/0x30 [nvme_fc]
     process_one_work+0x1e8/0x3c0

On abort timeout, completion was called without checking if the I/O was
already completed.

Verify that I/O and abort request are indeed outstanding before attempting
completion.

Fixes: 71c80b75ce8f ("scsi: qla2xxx: Do command completion on abort timeout")
Reported-by: Marco Patalano <mpatalan@redhat.com>
Tested-by: Marco Patalano <mpatalan@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Link: https://lore.kernel.org/r/20221129092634.15347-1-njavali@marvell.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/scsi/qla2xxx/qla_init.c