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Jiri Slaby |
a23e55 |
From: Marco Oliverio <marco.oliverio@tanaza.com>
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Jiri Slaby |
a23e55 |
Date: Mon, 2 Dec 2019 19:54:30 +0100
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Jiri Slaby |
a23e55 |
Subject: netfilter: nf_queue: enqueue skbs with NULL dst
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Jiri Slaby |
a23e55 |
Git-commit: 0b9173f4688dfa7c5d723426be1d979c24ce3d51
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Jiri Slaby |
a23e55 |
Patch-mainline: 5.5-rc3
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Jiri Slaby |
a23e55 |
References: git-fixes
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Jiri Slaby |
a23e55 |
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Jiri Slaby |
a23e55 |
Bridge packets that are forwarded have skb->dst == NULL and get
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Jiri Slaby |
a23e55 |
dropped by the check introduced by
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Jiri Slaby |
a23e55 |
b60a77386b1d4868f72f6353d35dabe5fbe981f2 (net: make skb_dst_force
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Jiri Slaby |
a23e55 |
return true when dst is refcounted).
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Jiri Slaby |
a23e55 |
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Jiri Slaby |
a23e55 |
To fix this we check skb_dst() before skb_dst_force(), so we don't
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Jiri Slaby |
a23e55 |
drop skb packet with dst == NULL. This holds also for skb at the
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Jiri Slaby |
a23e55 |
PRE_ROUTING hook so we remove the second check.
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Jiri Slaby |
a23e55 |
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Jiri Slaby |
a23e55 |
Fixes: b60a77386b1d ("net: make skb_dst_force return true when dst is refcounted")
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Jiri Slaby |
a23e55 |
Signed-off-by: Marco Oliverio <marco.oliverio@tanaza.com>
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Jiri Slaby |
a23e55 |
Signed-off-by: Rocco Folino <rocco.folino@tanaza.com>
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Jiri Slaby |
a23e55 |
Acked-by: Florian Westphal <fw@strlen.de>
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Jiri Slaby |
a23e55 |
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Jiri Slaby |
a23e55 |
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
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Jiri Slaby |
a23e55 |
---
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Jiri Slaby |
a23e55 |
net/netfilter/nf_queue.c | 2 +-
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Jiri Slaby |
a23e55 |
1 file changed, 1 insertion(+), 1 deletion(-)
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Jiri Slaby |
a23e55 |
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Jiri Slaby |
a23e55 |
--- a/net/netfilter/nf_queue.c
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Jiri Slaby |
a23e55 |
+++ b/net/netfilter/nf_queue.c
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Jiri Slaby |
a23e55 |
@@ -136,7 +136,7 @@ static int __nf_queue(struct sk_buff *sk
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Jiri Slaby |
a23e55 |
goto err;
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Jiri Slaby |
a23e55 |
}
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Jiri Slaby |
a23e55 |
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Jiri Slaby |
a23e55 |
- if (!skb_dst_force(skb) && state->hook != NF_INET_PRE_ROUTING) {
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Jiri Slaby |
a23e55 |
+ if (skb_dst(skb) && !skb_dst_force(skb)) {
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Jiri Slaby |
a23e55 |
status = -ENETDOWN;
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Jiri Slaby |
a23e55 |
goto err;
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Jiri Slaby |
a23e55 |
}
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