From eee2b5c840d93f704554f4a2884cef72742f22e2 Mon Sep 17 00:00:00 2001
From: Mike Christie <michaelc@cs.wisc.edu>
Date: Fri, 7 Feb 2014 00:41:42 -0600
Subject: [PATCH] [SCSI] iscsi_tcp: check for valid session before accessing
Check that the session is setup before accessing its
connection. This fixes a oops where userspace tries
to get the ip address before the session is bound to
a host.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
drivers/scsi/iscsi_tcp.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 12b351213c590..bfb6d07d87f06 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -759,6 +759,9 @@ static int iscsi_sw_tcp_host_get_param(struct Scsi_Host *shost,
switch (param) {
case ISCSI_HOST_PARAM_IPADDRESS:
+ if (!session)
+ return -ENOTCONN;
+
spin_lock_bh(&session->frwd_lock);
conn = session->leadconn;
if (!conn) {
--
2.30.2