From: Eric Leblond Date: Mon, 10 Mar 2008 23:41:43 +0000 (-0700) Subject: [NETFILTER]: nfnetlink_queue: fix computation of allocated size for netlink skb. X-Git-Tag: v2.6.25-rc6~31^2~14 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cabaa9bfb01eb4cee97ffb8a18405f4c5175d3d9;p=linux-2.6 [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 --- 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 */