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| author |   Hans Schillstrom <hans@schillstrom.com> | 2013-05-15 01:23:45 +0000 |
|---|---|---|
| committer |   Pablo Neira Ayuso <pablo@netfilter.org> | 2013-05-15 14:11:07 +0200 |
| commit | 8cdb46da06ea94543a3b2e53e3e92736421d1093 (patch) | |
| tree | 2f3d5703ee736daf10a3556c5c80f6bcca8731b8 /net/bridge/netfilter/ebt_log.c | |
| parent | netfilter: update MAINTAINERS file (diff) | |
| download | linux-dev-8cdb46da06ea94543a3b2e53e3e92736421d1093.tar.xz linux-dev-8cdb46da06ea94543a3b2e53e3e92736421d1093.zip | |
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: [<ffffffff8147f699>] 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 <ronald645@gmail.com>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to '')
| -rw-r--r-- | net/bridge/netfilter/ebt_log.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/net/bridge/netfilter/ebt_log.c b/net/bridge/netfilter/ebt_log.c index 9878eb8204c5..19c37a4929bc 100644 --- a/net/bridge/netfilter/ebt_log.c +++ b/net/bridge/netfilter/ebt_log.c @@ -72,13 +72,12 @@ print_ports(const struct sk_buff *skb, uint8_t protocol, int offset) } static void -ebt_log_packet(u_int8_t pf, unsigned int hooknum, - const struct sk_buff *skb, const struct net_device *in, - const struct net_device *out, const struct nf_loginfo *loginfo, - const char *prefix) +ebt_log_packet(struct net *net, u_int8_t pf, unsigned int hooknum, + const struct sk_buff *skb, const struct net_device *in, + const struct net_device *out, const struct nf_loginfo *loginfo, + const char *prefix) { unsigned int bitmask; - struct net *net = dev_net(in ? in : out); /* FIXME: Disabled from containers until syslog ns is supported */ if (!net_eq(net, &init_net)) @@ -191,7 +190,7 @@ ebt_log_tg(struct sk_buff *skb, const struct xt_action_param *par) nf_log_packet(net, NFPROTO_BRIDGE, par->hooknum, skb, par->in, par->out, &li, "%s", info->prefix); else - ebt_log_packet(NFPROTO_BRIDGE, par->hooknum, skb, par->in, + ebt_log_packet(net, NFPROTO_BRIDGE, par->hooknum, skb, par->in, par->out, &li, info->prefix); return EBT_CONTINUE; } |