From: Daniel Jurgens <danielj@mellanox.com>
Date: Fri, 30 Jun 2017 17:35:35 +0300
Subject: IB/core: Fix uninitialized variable use in
 check_qp_port_pkey_settings
Patch-mainline: v4.13-rc1
Git-commit: 79d0636ac7f839d57680305a462f0d8ff9bb13ec
References: bsc#1046306 FATE#322942

Check the return value from get_pkey_and_subnet_prefix to prevent using
uninitialized variables.

Fixes: d291f1a65232 ("IB/core: Enforce PKey security on QPs")
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/core/security.c |   20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

--- a/drivers/infiniband/core/security.c
+++ b/drivers/infiniband/core/security.c
@@ -120,21 +120,25 @@ static int check_qp_port_pkey_settings(s
 		return 0;
 
 	if (pps->main.state != IB_PORT_PKEY_NOT_VALID) {
-		get_pkey_and_subnet_prefix(&pps->main,
-					   &pkey,
-					   &subnet_prefix);
+		ret = get_pkey_and_subnet_prefix(&pps->main,
+						 &pkey,
+						 &subnet_prefix);
+		if (ret)
+			return ret;
 
 		ret = enforce_qp_pkey_security(pkey,
 					       subnet_prefix,
 					       sec);
+		if (ret)
+			return ret;
 	}
-	if (ret)
-		return ret;
 
 	if (pps->alt.state != IB_PORT_PKEY_NOT_VALID) {
-		get_pkey_and_subnet_prefix(&pps->alt,
-					   &pkey,
-					   &subnet_prefix);
+		ret = get_pkey_and_subnet_prefix(&pps->alt,
+						 &pkey,
+						 &subnet_prefix);
+		if (ret)
+			return ret;
 
 		ret = enforce_qp_pkey_security(pkey,
 					       subnet_prefix,