[PATCH] netfilter: release skbuf when nlmsg put fail

From: Houcheng Lin
Date: Mon Oct 13 2014 - 02:50:39 EST

When system is under heavy loading, the __nfulnl_send() may may failed
to put nlmsg into skbuf of nfulnl_instance. If not clear the skbuff on failed,
the __nfulnl_send() will still try to put next nlmsg onto this half-full skbuf
and cause the user program can never receive packet.

This patch fix this issue by releasing skbuf immediately after nlmst put

Signed-off-by: Houcheng Lin <houcheng@xxxxxxxxx>

net/netfilter/nfnetlink_log.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index a11c5ff..0cb9ede 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -358,10 +358,9 @@ __nfulnl_send(struct nfulnl_instance *inst)
status = nfnetlink_unicast(inst->skb, inst->net, inst->peer_portid,
inst->qlen = 0;
inst->skb = NULL;
return status;

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