From: Florian Westphal Date: Fri, 1 Apr 2016 12:17:25 +0000 (+0200) Subject: netfilter: x_tables: assert minimum target size X-Git-Tag: v3.18.37~13 X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=37a6fed6bcd018561cf18ddef42f6f6e106b220e;p=linux netfilter: x_tables: assert minimum target size [ Upstream commit a08e4e190b866579896c09af59b3bdca821da2cd ] The target size includes the size of the xt_entry_target struct. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin --- diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c index d846b52a6fc0..f432ee7e4d6d 100644 --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -570,6 +570,9 @@ int xt_check_entry_offsets(const void *base, return -EINVAL; t = (void *)(e + target_offset); + if (t->u.target_size < sizeof(*t)) + return -EINVAL; + if (target_offset + t->u.target_size > next_offset) return -EINVAL;