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net: shy netns_ok check

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Failure to pass netns_ok check is SILENT, except some MIB counter is
incremented somewhere.

And adding "netns_ok = 1" (after long head-scratching session) is
usually the last step in making some protocol netns-ready...

Signed-off-by: Alexey Dobriyan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Alexey Dobriyan 2008-11-12 23:23:51 -08:00 • committed by David S. Miller
commit 9c0188acf6
1 changed files with 9 additions and 1 deletions
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10
net/ipv4/ip_input.c
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@ -209,9 +209,17 @@ static int ip_local_deliver_finish(struct sk_buff *skb)
hash = protocol & (MAX_INET_PROTOS - 1);
ipprot = rcu_dereference(inet_protos[hash]);
if (ipprot != NULL && (net == &init_net || ipprot->netns_ok)) {
if (ipprot != NULL) {
int ret;
if (!net_eq(net, &init_net) && !ipprot->netns_ok) {
if (net_ratelimit())
printk("%s: proto %d isn't netns-ready\n",
__func__, protocol);
kfree_skb(skb);
goto out;
}
if (!ipprot->no_policy) {
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
kfree_skb(skb);