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netns: oops in ip[6]_frag_reasm incrementing stats 

dev can be NULL in ip[6]_frag_reasm for skb's coming from RAW sockets.

Quagga's OSPFD sends fragmented packets on a RAW socket, when netfilter
conntrack reassembles them on the OUTPUT path you hit this code path.

You can test it with something like "hping2 -0 -d 2000 -f AA.BB.CC.DD"

With help from Jarek Poplawski.

Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jorge Boncompte [DTI2] 2009-03-18 23:26:11 -07:00 committed by David S. Miller
parent e4a389a9b5
commit 2bad35b7c9
2 changed files with 5 additions and 5 deletions
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3
net/ipv4/ip_fragment.c
View File

@ -463,6 +463,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
struct net_device *dev)
{
struct net *net = container_of(qp->q.net, struct net, ipv4.frags);
struct iphdr *iph;
struct sk_buff *fp, *head = qp->q.fragments;
int len;
@ -548,7 +549,7 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
iph = ip_hdr(head);
iph->frag_off = 0;
iph->tot_len = htons(len);
IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_REASMOKS);
IP_INC_STATS_BH(net, IPSTATS_MIB_REASMOKS);
qp->q.fragments = NULL;
return 0;

7
net/ipv6/reassembly.c
View File

@ -452,6 +452,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
struct net_device *dev)
{
struct net *net = container_of(fq->q.net, struct net, ipv6.frags);
struct sk_buff *fp, *head = fq->q.fragments;
int payload_len;
unsigned int nhoff;
@ -551,8 +552,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
head->csum);
rcu_read_lock();
IP6_INC_STATS_BH(dev_net(dev),
__in6_dev_get(dev), IPSTATS_MIB_REASMOKS);
IP6_INC_STATS_BH(net, __in6_dev_get(dev), IPSTATS_MIB_REASMOKS);
rcu_read_unlock();
fq->q.fragments = NULL;
return 1;
@ -566,8 +566,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
printk(KERN_DEBUG "ip6_frag_reasm: no memory for reassembly\n");
out_fail:
rcu_read_lock();
IP6_INC_STATS_BH(dev_net(dev),
__in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);
IP6_INC_STATS_BH(net, __in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);
rcu_read_unlock();
return -1;
}