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| author | Cong Wang <xiyou.wangcong@gmail.com> | 2020-01-10 11:53:08 -0800 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-01-13 18:53:59 +0100 |
| commit | c120959387efa51479056fd01dc90adfba7a590c (patch) | |
| tree | 383269c98a778495978a7e56e69962040e4cf600 /net | |
| parent | c9f53049d4a842db6bcd76f597759a0ef5f65c86 (diff) | |
| download | linux-c120959387efa51479056fd01dc90adfba7a590c.tar.gz linux-c120959387efa51479056fd01dc90adfba7a590c.tar.bz2 linux-c120959387efa51479056fd01dc90adfba7a590c.zip | |
netfilter: fix a use-after-free in mtype_destroy()
map->members is freed by ip_set_free() right before using it in
mtype_ext_cleanup() again. So we just have to move it down.
Reported-by: syzbot+4c3cc6dbe7259dbf9054@syzkaller.appspotmail.com
Fixes: 40cd63bf33b2 ("netfilter: ipset: Support extensions which need a per data destroy function")
Acked-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/ipset/ip_set_bitmap_gen.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netfilter/ipset/ip_set_bitmap_gen.h b/net/netfilter/ipset/ip_set_bitmap_gen.h index 1abd6f0dc227..077a2cb65fcb 100644 --- a/net/netfilter/ipset/ip_set_bitmap_gen.h +++ b/net/netfilter/ipset/ip_set_bitmap_gen.h @@ -60,9 +60,9 @@ mtype_destroy(struct ip_set *set) if (SET_WITH_TIMEOUT(set)) del_timer_sync(&map->gc); - ip_set_free(map->members); if (set->dsize && set->extensions & IPSET_EXT_DESTROY) mtype_ext_cleanup(set); + ip_set_free(map->members); ip_set_free(map); set->data = NULL; |