android/android_kernel_asus_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

scsi: qla2xxx: Wait for io return on terminate rport

Browse Source 
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>
This commit is contained in:
Quinn Tran 2023-04-28 00:53:38 -07:00 committed by Greg Kroah-Hartman
parent 056fd18207
commit d25fded78d
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/scsi/qla2xxx/qla_attr.c
View File

@ -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