From cabaa9bfb01eb4cee97ffb8a18405f4c5175d3d9 Mon Sep 17 00:00:00 2001 From: Eric Leblond Date: Mon, 10 Mar 2008 16:41:43 -0700 Subject: [PATCH] [NETFILTER]: nfnetlink_queue: fix computation of allocated size for netlink skb. Size of the netlink skb was wrongly computed because the formula was using NLMSG_ALIGN instead of NLMSG_SPACE. NLMSG_ALIGN does not add the room for netlink header as NLMSG_SPACE does. This was causing a failure of message building in some cases. On my test system, all messages for packets in range [8*k+41, 8*k+48] where k is an integer were invalid and the corresponding packets were dropped. Signed-off-by: Eric Leblond Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/netfilter/nfnetlink_queue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c index 0043d3a9f8..c0cc3d3618 100644 --- a/net/netfilter/nfnetlink_queue.c +++ b/net/netfilter/nfnetlink_queue.c @@ -224,7 +224,7 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue, struct net_device *indev; struct net_device *outdev; - size = NLMSG_ALIGN(sizeof(struct nfgenmsg)) + size = NLMSG_SPACE(sizeof(struct nfgenmsg)) + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) + nla_total_size(sizeof(u_int32_t)) /* ifindex */ + nla_total_size(sizeof(u_int32_t)) /* ifindex */ -- 2.39.5