From fed396a585d8e1870b326f2e8e1888a72957abb8 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 15 Jun 2010 21:43:07 -0700 Subject: bridge: Fix OOM crash in deliver_clone The bridge multicast patches introduced an OOM crash in the forward path, when deliver_clone fails to clone the skb. Reported-by: Mark Wagner Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/bridge/br_forward.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/bridge') diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c index a98ef1393097..a4e72a89e4ff 100644 --- a/net/bridge/br_forward.c +++ b/net/bridge/br_forward.c @@ -140,10 +140,10 @@ static int deliver_clone(const struct net_bridge_port *prev, void (*__packet_hook)(const struct net_bridge_port *p, struct sk_buff *skb)) { + struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev; + skb = skb_clone(skb, GFP_ATOMIC); if (!skb) { - struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev; - dev->stats.tx_dropped++; return -ENOMEM; } -- cgit v1.2.3-59-g8ed1b From 25442e06d20aaba7d7b16438078a562b3e4cf19b Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Tue, 15 Jun 2010 06:14:12 +0000 Subject: bridge: fdb cleanup runs too often It is common in end-node, non STP bridges to set forwarding delay to zero; which causes the forwarding database cleanup to run every clock tick. Change to run only as soon as needed or at next ageing timer interval which ever is sooner. Use round_jiffies_up macro rather than attempting round up by changing value. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/bridge/br_fdb.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'net/bridge') diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 26637439965b..b01dde35a69e 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -128,7 +128,7 @@ void br_fdb_cleanup(unsigned long _data) { struct net_bridge *br = (struct net_bridge *)_data; unsigned long delay = hold_time(br); - unsigned long next_timer = jiffies + br->forward_delay; + unsigned long next_timer = jiffies + br->ageing_time; int i; spin_lock_bh(&br->hash_lock); @@ -149,9 +149,7 @@ void br_fdb_cleanup(unsigned long _data) } spin_unlock_bh(&br->hash_lock); - /* Add HZ/4 to ensure we round the jiffies upwards to be after the next - * timer, otherwise we might round down and will have no-op run. */ - mod_timer(&br->gc_timer, round_jiffies(next_timer + HZ/4)); + mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); } /* Completely flush all dynamic entries in forwarding database.*/ -- cgit v1.2.3-59-g8ed1b