From 8cdb46da06ea94543a3b2e53e3e92736421d1093 Mon Sep 17 00:00:00 2001 From: Hans Schillstrom Date: Wed, 15 May 2013 01:23:45 +0000 Subject: netfilter: log: netns NULL ptr bug when calling from conntrack Since (69b34fb netfilter: xt_LOG: add net namespace support for xt_LOG), we hit this: [ 4224.708977] BUG: unable to handle kernel NULL pointer dereference at 0000000000000388 [ 4224.709074] IP: [] ipt_log_packet+0x29/0x270 when callling log functions from conntrack both in and out are NULL i.e. the net pointer is invalid. Adding struct net *net in call to nf_logfn() will secure that there always is a vaild net ptr. Reported as netfilter's bugzilla bug 818: https://bugzilla.netfilter.org/show_bug.cgi?id=818 Reported-by: Ronald Signed-off-by: Hans Schillstrom Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nfnetlink_log.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/netfilter/nfnetlink_log.c') diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c index d83d881..962e979 100644 --- a/net/netfilter/nfnetlink_log.c +++ b/net/netfilter/nfnetlink_log.c @@ -602,7 +602,8 @@ static struct nf_loginfo default_loginfo = { /* log handler for internal netfilter logging api */ void -nfulnl_log_packet(u_int8_t pf, +nfulnl_log_packet(struct net *net, + u_int8_t pf, unsigned int hooknum, const struct sk_buff *skb, const struct net_device *in, @@ -615,7 +616,6 @@ nfulnl_log_packet(u_int8_t pf, const struct nf_loginfo *li; unsigned int qthreshold; unsigned int plen; - struct net *net = dev_net(in ? in : out); struct nfnl_log_net *log = nfnl_log_pernet(net); if (li_user && li_user->type == NF_LOG_TYPE_ULOG) -- cgit v1.1