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netfilter: core: return EBUSY in case NAT hook is already in use 

EEXIST is used for an object that already exists, with the same
name/handle. However, there no same object there, instead there is a
object that is using the single slot that is available for NAT hooks
since patch f92b40a8b2 ("netfilter: core: only allow one nat hook per
hook point"). Let's change this return value before this behaviour gets
exposed in the first -rc.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2018-01-10 15:24:15 +01:00
parent 99eadf67c8
commit cbef426ce7
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/core.c
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@ -140,7 +140,7 @@ nf_hook_entries_grow(const struct nf_hook_entries *old,
if (reg->nat_hook && orig_ops[i]->nat_hook) {
kvfree(new);
return ERR_PTR(-EEXIST);
return ERR_PTR(-EBUSY);
}
if (inserted || reg->priority > orig_ops[i]->priority) {