[ Upstream commit 946c0d8e6ed43dae6527e878d0077c1e11015db0 ]
This patch fixes netfilter hook traversal when there are more than 1 hooks returning NF_QUEUE verdict. When the first queue reinjects the packet, 'nf_reinject' starts traversing hooks with a proper hook_index. However, if it again receives a NF_QUEUE verdict (by some other netfilter hook), it queues the packet with a wrong hook_index. So, when the second queue reinjects the packet, it re-executes hooks in between.
Fixes: 960632ece694 ("netfilter: convert hook list to an array") Signed-off-by: Jagdish Motwani jagdish.motwani@sophos.com Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/nf_queue.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c index d67a96a25a68..7569ba00e732 100644 --- a/net/netfilter/nf_queue.c +++ b/net/netfilter/nf_queue.c @@ -238,6 +238,7 @@ static unsigned int nf_iterate(struct sk_buff *skb, repeat: verdict = nf_hook_entry_hookfn(hook, skb, state); if (verdict != NF_ACCEPT) { + *index = i; if (verdict != NF_REPEAT) return verdict; goto repeat;