netfilter: x_tables: set module owner for icmp(6) matches

[ Upstream commit d376bef9c29b3c65aeee4e785fffcd97ef0a9a81 ]

nft_compat relies on xt_request_find_match to increment
refcount of the module that provides the match/target.

The (builtin) icmp matches did't set the module owner so it
was possible to rmmod ip(6)tables while icmp extensions were still in use.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 06aa494..4822459 100644 (file)
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -1913,6 +1913,7 @@ static struct xt_match ipt_builtin_mt[] __read_mostly = {
                .checkentry = icmp_checkentry,
                .proto      = IPPROTO_ICMP,
                .family     = NFPROTO_IPV4,
+               .me         = THIS_MODULE,
        },
 };
 

diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 180f195..21cad30 100644 (file)
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -1934,6 +1934,7 @@ static struct xt_match ip6t_builtin_mt[] __read_mostly = {
                .checkentry = icmp6_checkentry,
                .proto      = IPPROTO_ICMPV6,
                .family     = NFPROTO_IPV6,
+               .me         = THIS_MODULE,
        },
 };