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netfilter: nf_nat: don't bug when mapping already exists 

It seems preferrable to limp along if we have a conflicting mapping,
its certainly better than a BUG().

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2017-08-31 13:45:24 +02:00 committed by Pablo Neira Ayuso
parent 68913a018f
commit 75c2631468
1 changed files with 3 additions and 1 deletions
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4
net/netfilter/nf_nat_core.c
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@ -416,7 +416,9 @@ nf_nat_setup_info(struct nf_conn *ct,
WARN_ON(maniptype != NF_NAT_MANIP_SRC &&
maniptype != NF_NAT_MANIP_DST);
BUG_ON(nf_nat_initialized(ct, maniptype));
if (WARN_ON(nf_nat_initialized(ct, maniptype)))
return NF_DROP;
/* What we've got will look like inverse of reply. Normally
* this is what is in the conntrack, except for prior