Emergency skbs should never touch user-space, however NF_QUEUE is fully user
configurable. Notify the user of his mistake and try to continue.
Signed-off-by: Peter Zijlstra <[email protected]>
---
net/netfilter/core.c | 5 +++++
1 file changed, 5 insertions(+)
Index: linux-2.6-git/net/netfilter/core.c
===================================================================
--- linux-2.6-git.orig/net/netfilter/core.c 2007-02-14 12:09:07.000000000 +0100
+++ linux-2.6-git/net/netfilter/core.c 2007-02-14 12:09:18.000000000 +0100
@@ -187,6 +187,11 @@ next_hook:
kfree_skb(*pskb);
ret = -EPERM;
} else if ((verdict & NF_VERDICT_MASK) == NF_QUEUE) {
+ if (unlikely((*pskb)->emergency)) {
+ printk(KERN_ERR "nf_hook: NF_QUEUE encountered for "
+ "emergency skb - skipping rule.\n");
+ goto next_hook;
+ }
NFDEBUG("nf_hook: Verdict = QUEUE.\n");
if (!nf_queue(*pskb, elem, pf, hook, indev, outdev, okfn,
verdict >> NF_VERDICT_BITS))
--
-
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