diff options
| author | Florian Westphal <fw@strlen.de> | 2021-05-03 13:51:15 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2021-05-03 23:04:01 +0200 |
| commit | 43016d02cf6e46edfc4696452251d34bba0c0435 (patch) | |
| tree | eb9028ed20c69945c239e7a69c00eee0974acebb | |
| parent | c7d13358b6a2f49f81a34aa323a2d0878a0532a2 (diff) | |
| download | linux-43016d02cf6e46edfc4696452251d34bba0c0435.tar.bz2 | |
netfilter: arptables: use pernet ops struct during unregister
Like with iptables and ebtables, hook unregistration has to use the
pernet ops struct, not the template.
This triggered following splat:
hook not found, pf 3 num 0
WARNING: CPU: 0 PID: 224 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 net/netfilter/core.c:480
[..]
nf_unregister_net_hook net/netfilter/core.c:502 [inline]
nf_unregister_net_hooks+0x117/0x160 net/netfilter/core.c:576
arpt_unregister_table_pre_exit+0x67/0x80 net/ipv4/netfilter/arp_tables.c:1565
Fixes: f9006acc8dfe5 ("netfilter: arp_tables: pass table pointer via nf_hook_ops")
Reported-by: syzbot+dcccba8a1e41a38cb9df@syzkaller.appspotmail.com
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | include/linux/netfilter_arp/arp_tables.h | 3 | ||||
| -rw-r--r-- | net/ipv4/netfilter/arp_tables.c | 5 | ||||
| -rw-r--r-- | net/ipv4/netfilter/arptable_filter.c | 2 |
3 files changed, 4 insertions, 6 deletions
diff --git a/include/linux/netfilter_arp/arp_tables.h b/include/linux/netfilter_arp/arp_tables.h index 2aab9612f6ab..4f9a4b3c5892 100644 --- a/include/linux/netfilter_arp/arp_tables.h +++ b/include/linux/netfilter_arp/arp_tables.h @@ -53,8 +53,7 @@ int arpt_register_table(struct net *net, const struct xt_table *table, const struct arpt_replace *repl, const struct nf_hook_ops *ops); void arpt_unregister_table(struct net *net, const char *name); -void arpt_unregister_table_pre_exit(struct net *net, const char *name, - const struct nf_hook_ops *ops); +void arpt_unregister_table_pre_exit(struct net *net, const char *name); extern unsigned int arpt_do_table(struct sk_buff *skb, const struct nf_hook_state *state, struct xt_table *table); diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c index cf20316094d0..c53f14b94356 100644 --- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -1556,13 +1556,12 @@ out_free: return ret; } -void arpt_unregister_table_pre_exit(struct net *net, const char *name, - const struct nf_hook_ops *ops) +void arpt_unregister_table_pre_exit(struct net *net, const char *name) { struct xt_table *table = xt_find_table(net, NFPROTO_ARP, name); if (table) - nf_unregister_net_hooks(net, ops, hweight32(table->valid_hooks)); + nf_unregister_net_hooks(net, table->ops, hweight32(table->valid_hooks)); } EXPORT_SYMBOL(arpt_unregister_table_pre_exit); diff --git a/net/ipv4/netfilter/arptable_filter.c b/net/ipv4/netfilter/arptable_filter.c index b8f45e9bbec8..6922612df456 100644 --- a/net/ipv4/netfilter/arptable_filter.c +++ b/net/ipv4/netfilter/arptable_filter.c @@ -54,7 +54,7 @@ static int __net_init arptable_filter_table_init(struct net *net) static void __net_exit arptable_filter_net_pre_exit(struct net *net) { - arpt_unregister_table_pre_exit(net, "filter", arpfilter_ops); + arpt_unregister_table_pre_exit(net, "filter"); } static void __net_exit arptable_filter_net_exit(struct net *net) |