[PATCH] iscsi-target: fix panic when add the second TCP connection to iSCSI session

[Feng Li]

From: Feng Li <lifeng1...@gmail.com>

In MC/S scenario, the conn->sess has been set NULL in
iscsi_login_non_zero_tsih_s1 when the second connection comes here,
then kernel panic.

The conn->sess will be assigned in iscsi_login_non_zero_tsih_s2. So
we should check whether it's NULL before calling.

Signed-off-by: Feng Li <lifeng1...@gmail.com>
---
 drivers/target/iscsi/iscsi_target_login.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/target/iscsi/iscsi_target_login.c 
b/drivers/target/iscsi/iscsi_target_login.c
index b5212f0..adf419f 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -1371,8 +1371,9 @@ static int __iscsi_target_login_thread(struct iscsi_np 
*np)
        }
        login->zero_tsih = zero_tsih;
 
-       conn->sess->se_sess->sup_prot_ops =
-               conn->conn_transport->iscsit_get_sup_prot_ops(conn);
+       if (conn->sess)
+               conn->sess->se_sess->sup_prot_ops =
+                       conn->conn_transport->iscsit_get_sup_prot_ops(conn);
 
        tpg = conn->tpg;
        if (!tpg) {
-- 
2.9.0