netdev - [PATCH net] bridge: Fix memory leak in br_dev

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 28 Mar 2014 15:21:19 +0900
From:	Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
To:	"David S . Miller" <davem@...emloft.net>,
	Stephen Hemminger <stephen@...workplumber.org>
Cc:	Toshiaki Makita <makita.toshiaki@....ntt.co.jp>,
	Vlad Yasevich <vyasevic@...hat.com>, netdev@...r.kernel.org,
	bridge@...ts.linux-foundation.org
Subject: [PATCH net] bridge: Fix memory leak in br_dev_xmit

When a frame is rejected by br_allowed_ingress(), the skb is not freed.

Signed-off-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
---
 net/bridge/br_device.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 8fe8b71..b152fb6 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -55,7 +55,7 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 	skb_pull(skb, ETH_HLEN);
 
 	if (!br_allowed_ingress(br, br_get_vlan_info(br), skb, &vid))
-		goto out;
+		goto drop;
 
 	if (is_broadcast_ether_addr(dest))
 		br_flood_deliver(br, skb, false);
@@ -64,10 +64,8 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 			br_flood_deliver(br, skb, false);
 			goto out;
 		}
-		if (br_multicast_rcv(br, NULL, skb, vid)) {
-			kfree_skb(skb);
-			goto out;
-		}
+		if (br_multicast_rcv(br, NULL, skb, vid))
+			goto drop;
 
 		mdst = br_mdb_get(br, skb, vid);
 		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
@@ -83,6 +81,9 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 out:
 	rcu_read_unlock();
 	return NETDEV_TX_OK;
+drop:
+	kfree_skb(skb);
+	goto out;
 }
 
 static int br_dev_init(struct net_device *dev)
-- 
1.8.1.2

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html