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Date: Wed, 12 Nov 2008 03:15:09 +0300
From: Alexey Dobriyan <adobriyan@...il.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, den@...nvz.org
Subject: [PATCH] net: shy netns_ok check
Sigh...
Failure to pass netns_ok check is SILENT, except some MIB counted is
incremented somewhere.
And adding "netns_ok = 1" (after long head-scratching session) is usually
the last step in making some protocol netns-ready...
Please, apply.
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---
net/ipv4/ip_input.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -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);
--
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