From e40dbc51fbcc3281bb52ecf0f5bec693d36e2aea Mon Sep 17 00:00:00 2001 From: Ben Greear Date: Thu, 15 Jul 2010 13:22:33 +0000 Subject: [PATCH] ipmr: Don't leak memory if fib lookup fails. This was detected using two mcast router tables. The pimreg for the second interface did not have a specific mrule, so packets received by it were handled by the default table, which had nothing configured. This caused the ipmr_fib_lookup to fail, causing the memory leak. Signed-off-by: Ben Greear Signed-off-by: David S. Miller --- net/ipv4/ipmr.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 757f25eb9b4b..7f6273506eea 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -442,8 +442,10 @@ static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, struct net_device *dev) int err; err = ipmr_fib_lookup(net, &fl, &mrt); - if (err < 0) + if (err < 0) { + kfree_skb(skb); return err; + } read_lock(&mrt_lock); dev->stats.tx_bytes += skb->len; @@ -1728,8 +1730,10 @@ int ip_mr_input(struct sk_buff *skb) goto dont_forward; err = ipmr_fib_lookup(net, &skb_rtable(skb)->fl, &mrt); - if (err < 0) + if (err < 0) { + kfree_skb(skb); return err; + } if (!local) { if (IPCB(skb)->opt.router_alert) {