From d25fded78d88e1515439b3ba581684d683e0b6ab Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Fri, 28 Apr 2023 00:53:38 -0700
Subject: [PATCH] scsi: qla2xxx: Wait for io return on terminate rport
commit fc0cba0c7be8261a1625098bd1d695077ec621c9 upstream.
System crash due to use after free.
Current code allows terminate_rport_io to exit before making
sure all IOs has returned. For FCP-2 device, IO's can hang
on in HW because driver has not tear down the session in FW at
first sign of cable pull. When dev_loss_tmo timer pops,
terminate_rport_io is called and upper layer is about to
free various resources. Terminate_rport_io trigger qla to do
the final cleanup, but the cleanup might not be fast enough where it
leave qla still holding on to the same resource.
Wait for IO's to return to upper layer before resources are freed.
Cc: stable@vger.kernel.org
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Link: https://lore.kernel.org/r/20230428075339.32551-7-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/scsi/qla2xxx/qla_attr.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 59f5dc9876cc..be3525d17fc9 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -2574,6 +2574,7 @@ static void
qla2x00_terminate_rport_io(struct fc_rport *rport)
{
fc_port_t *fcport = *(fc_port_t **)rport->dd_data;
+ scsi_qla_host_t *vha;
if (!fcport)
return;
@@ -2583,9 +2584,12 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
if (test_bit(ABORT_ISP_ACTIVE, &fcport->vha->dpc_flags))
return;
+ vha = fcport->vha;
if (unlikely(pci_channel_offline(fcport->vha->hw->pdev))) {
qla2x00_abort_all_cmds(fcport->vha, DID_NO_CONNECT << 16);
+ qla2x00_eh_wait_for_pending_commands(fcport->vha, fcport->d_id.b24,
+ 0, WAIT_TARGET);
return;
}
/*
@@ -2600,6 +2604,15 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
else
qla2x00_port_logout(fcport->vha, fcport);
}
+
+ /* check for any straggling io left behind */
+ if (qla2x00_eh_wait_for_pending_commands(fcport->vha, fcport->d_id.b24, 0, WAIT_TARGET)) {
+ ql_log(ql_log_warn, vha, 0x300b,
+ "IO not return. Resetting. \n");
+ set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+ qla2xxx_wake_dpc(vha);
+ qla2x00_wait_for_chip_reset(vha);
+ }
}
static int