Avoid memory getting stuck waiting for userspace, drop all emergency packets.
This of course requires the regular storage route to not include an NF_QUEUE
target ;-)

Signed-off-by: Peter Zijlstra
---
net/netfilter/core.c | 3 +++
1 file changed, 3 insertions(+)

Index: linux-2.6/net/netfilter/core.c
================================================== =================
--- linux-2.6.orig/net/netfilter/core.c
+++ linux-2.6/net/netfilter/core.c
@@ -181,9 +181,12 @@ next_hook:
ret = 1;
goto unlock;
} else if (verdict == NF_DROP) {
+drop:
kfree_skb(*pskb);
ret = -EPERM;
} else if ((verdict & NF_VERDICT_MASK) == NF_QUEUE) {
+ if (skb_emergency(*pskb))
+ goto drop;
NFDEBUG("nf_hook: Verdict = QUEUE.\n");
if (!nf_queue(*pskb, elem, pf, hook, indev, outdev, okfn,
verdict >> NF_VERDICT_BITS))

--

-
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