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32 lines
998 B
32 lines
998 B
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
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Subject: [PATCH 21/31] netfilter: NF_QUEUE vs emergency skbs
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Patch-mainline: not yet
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Avoid memory getting stuck waiting for userspace, drop all emergency packets.
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This of course requires the regular storage route to not include an NF_QUEUE
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target ;-)
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Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
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Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
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---
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net/netfilter/core.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/net/netfilter/core.c
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+++ b/net/netfilter/core.c
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@@ -176,11 +176,14 @@ next_hook:
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if (verdict == NF_ACCEPT || verdict == NF_STOP) {
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ret = 1;
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} else if ((verdict & NF_VERDICT_MASK) == NF_DROP) {
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+drop:
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kfree_skb(skb);
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ret = -(verdict >> NF_VERDICT_BITS);
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if (ret == 0)
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ret = -EPERM;
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} else if ((verdict & NF_VERDICT_MASK) == NF_QUEUE) {
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+ if (skb_emergency(skb))
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+ goto drop;
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if (!nf_queue(skb, elem, pf, hook, indev, outdev, okfn,
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verdict >> NF_VERDICT_BITS))
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goto next_hook;
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