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authorDavid S. Miller <davem@davemloft.net>2010-05-20 23:12:18 -0700
committerDavid S. Miller <davem@davemloft.net>2010-05-20 23:12:18 -0700
commit41499bd6766314079417d1467c466d31b8612fec (patch)
tree5ce777cd47603977ee55059891c67b8a420e05a1 /net
parent622e0ca1cd4d459f5af4f2c65f4dc0dd823cb4c3 (diff)
parent7ea7b858f4bc4fa1645f1327cf9e72c93981aa58 (diff)
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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_conntrack_core.c10
-rw-r--r--net/netfilter/nf_conntrack_sip.c12
2 files changed, 14 insertions, 8 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index b83c530..eeeb8bc 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -424,6 +424,16 @@ __nf_conntrack_confirm(struct sk_buff *skb)
spin_lock_bh(&nf_conntrack_lock);
+ /* We have to check the DYING flag inside the lock to prevent
+ a race against nf_ct_get_next_corpse() possibly called from
+ user context, else we insert an already 'dead' hash, blocking
+ further use of that particular connection -JM */
+
+ if (unlikely(nf_ct_is_dying(ct))) {
+ spin_unlock_bh(&nf_conntrack_lock);
+ return NF_ACCEPT;
+ }
+
/* See if there's one in the list already, including reverse:
NAT could have grabbed it without realizing, since we're
not in the hash. If there is, we lost race. */
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index b20f427..53d8922 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -1393,10 +1393,8 @@ static int sip_help_tcp(struct sk_buff *skb, unsigned int protoff,
nf_ct_refresh(ct, skb, sip_timeout * HZ);
- if (skb_is_nonlinear(skb)) {
- pr_debug("Copy of skbuff not supported yet.\n");
- return NF_ACCEPT;
- }
+ if (unlikely(skb_linearize(skb)))
+ return NF_DROP;
dptr = skb->data + dataoff;
datalen = skb->len - dataoff;
@@ -1455,10 +1453,8 @@ static int sip_help_udp(struct sk_buff *skb, unsigned int protoff,
nf_ct_refresh(ct, skb, sip_timeout * HZ);
- if (skb_is_nonlinear(skb)) {
- pr_debug("Copy of skbuff not supported yet.\n");
- return NF_ACCEPT;
- }
+ if (unlikely(skb_linearize(skb)))
+ return NF_DROP;
dptr = skb->data + dataoff;
datalen = skb->len - dataoff;