linux-kernel - [PATCH 1/1] scsi: scsi_transport_fc: Fix a bug in the error handling function

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Date:	Thu,  7 Jan 2016 16:40:45 -0800
From:	"K. Y. Srinivasan" <kys@...rosoft.com>
To:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, ohering@...e.com,
	jbottomley@...allels.com, hch@...radead.org,
	linux-scsi@...r.kernel.org, apw@...onical.com, vkuznets@...hat.com,
	jasowang@...hat.com, martin.petersen@...cle.com, hare@...e.de
Cc:	"K. Y. Srinivasan" <kys@...rosoft.com>, <stable@...r.kernel.org>
Subject: [PATCH 1/1] scsi: scsi_transport_fc: Fix a bug in the error handling function

The macro startget_to_rport() can return NULL; handle that case
properly.

Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
Cc: <stable@...r.kernel.org>
---
 drivers/scsi/scsi_transport_fc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 24eaaf6..42a908f 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -2081,7 +2081,7 @@ fc_timed_out(struct scsi_cmnd *scmd)
 {
 	struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
 
-	if (rport->port_state == FC_PORTSTATE_BLOCKED)
+	if ((rport == NULL) || (rport->port_state == FC_PORTSTATE_BLOCKED))
 		return BLK_EH_RESET_TIMER;
 
 	return BLK_EH_NOT_HANDLED;
-- 
1.7.4.1