netdev - [PATCH net] sit: Correctly return -ENOMEM from SIOCGETPRL ioctl.

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Message-Id: <20160727135725.13559-1-phil.turnbull@oracle.com>
Date:	Wed, 27 Jul 2016 09:57:25 -0400
From:	Phil Turnbull <phil.turnbull@...cle.com>
To:	netdev@...r.kernel.org
Cc:	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	Phil Turnbull <phil.turnbull@...cle.com>
Subject: [PATCH net] sit: Correctly return -ENOMEM from SIOCGETPRL ioctl.

-ENOMEM is never returned because the 'out' path unconditionally sets
'ret' to zero. Remove the 'out' path and return directly when the
allocation fails.

Fixes: 300aaeeaab5f ("[IPV6] SIT: Add SIOCGETPRL ioctl to get/dump PRL.")
Signed-off-by: Phil Turnbull <phil.turnbull@...cle.com>
---
 net/ipv6/sit.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 0619ac70836d..a71514040bb4 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -320,8 +320,8 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t,
 		 */
 		kp = kcalloc(ca, sizeof(*kp), GFP_ATOMIC);
 		if (!kp) {
-			ret = -ENOMEM;
-			goto out;
+			rcu_read_unlock();
+			return -ENOMEM;
 		}
 	}
 
@@ -337,7 +337,7 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t,
 		if (kprl.addr != htonl(INADDR_ANY))
 			break;
 	}
-out:
+
 	rcu_read_unlock();
 
 	len = sizeof(*kp) * c;
-- 
2.9.0.rc2