[PATCH 2/3] netfilter: conntrack: comparison of unsigned in cthelper confirmation

[Pablo Neira Ayuso]

net/netfilter/nf_conntrack_core.c: In function nf_confirm_cthelper:
net/netfilter/nf_conntrack_core.c:2117:15: warning: comparison of unsigned 
expression in < 0 is always false [-Wtype-limits]
 2117 |   if (protoff < 0 || (frag_off & htons(~0x7)) != 0)
      |               ^

ipv6_skip_exthdr() returns a signed integer.

Reported-by: Colin Ian King <colin.k...@canonical.com>
Fixes: 703acd70f249 ("netfilter: nfnetlink_cthelper: unbreak userspace helper 
support")
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
---
 net/netfilter/nf_conntrack_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nf_conntrack_core.c 
b/net/netfilter/nf_conntrack_core.c
index e3b054a2f796..bb72ca5f3999 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -2092,7 +2092,7 @@ static int nf_confirm_cthelper(struct sk_buff *skb, 
struct nf_conn *ct,
 {
        const struct nf_conntrack_helper *helper;
        const struct nf_conn_help *help;
-       unsigned int protoff;
+       int protoff;
 
        help = nfct_help(ct);
        if (!help)
-- 
2.20.1