Same as previous change: we need to mask out the non-verdict bits, as
upcoming patches may embed an errno value in NF_STOLEN verdicts too.
NF_DROP could already do this, but not all called functions do this.
Checks that only test ret vs NF_ACCEPT are fine, the 'errno parts'
are always 0 for those.
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
net/netfilter/nf_nat_proto.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/nf_nat_proto.c b/net/netfilter/nf_nat_proto.c
index 5a049740758f..6d969468c779 100644
--- a/net/netfilter/nf_nat_proto.c
+++ b/net/netfilter/nf_nat_proto.c
@@ -999,11 +999,12 @@ static unsigned int
nf_nat_ipv6_in(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state)
{
- unsigned int ret;
+ unsigned int ret, verdict;
struct in6_addr daddr = ipv6_hdr(skb)->daddr;
ret = nf_nat_ipv6_fn(priv, skb, state);
- if (ret != NF_DROP && ret != NF_STOLEN &&
+ verdict = ret & NF_VERDICT_MASK;
+ if (verdict != NF_DROP && verdict != NF_STOLEN &&
ipv6_addr_cmp(&daddr, &ipv6_hdr(skb)->daddr))
skb_dst_drop(skb);
--
2.41.0
