From bbd3d7380bc67c27b31548e0a33fc5efc4e0fc3d Mon Sep 17 00:00:00 2001 From: James Smart Date: Tue, 12 Mar 2019 16:30:17 -0700 Subject: [PATCH] scsi: lpfc: Fix driver crash in target reset handler It's possible for the scsi error handler to fire and call the target reset handler simultaneously to the driver logging out and relogging into the system. If hit just right, the re-login may not have fully re-established the remote port and the rdata->pnod structure may be null. Check for NULL in the reset handler and return failure if NULL. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen --- drivers/scsi/lpfc/lpfc_scsi.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index f787d6894daf..2cfb052d35d8 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -5049,7 +5049,7 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd) rdata = lpfc_rport_data_from_scsi_device(cmnd->device); if (!rdata || !rdata->pnode) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, - "0798 Device Reset rport failure: rdata x%p\n", + "0798 Device Reset rdata failure: rdata x%p\n", rdata); return FAILED; } @@ -5118,9 +5118,10 @@ lpfc_target_reset_handler(struct scsi_cmnd *cmnd) int status; rdata = lpfc_rport_data_from_scsi_device(cmnd->device); - if (!rdata) { + if (!rdata || !rdata->pnode) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, - "0799 Target Reset rport failure: rdata x%p\n", rdata); + "0799 Target Reset rdata failure: rdata x%p\n", + rdata); return FAILED; } pnode = rdata->pnode;