Messages in this thread Patch in this message | | | From | Willy Tarreau <> | Subject | [PATCH 3.10 010/180] netfilter: x_tables: assert minimum target size | Date | Sun, 21 Aug 2016 17:29:00 +0200 |
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From: Florian Westphal <fw@strlen.de>
commit a08e4e190b866579896c09af59b3bdca821da2cd upstream.
The target size includes the size of the xt_entry_target struct.
Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Willy Tarreau <w@1wt.eu> --- net/netfilter/x_tables.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c index 55b1e0c..cc34bb3 100644 --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -587,6 +587,9 @@ 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; -- 2.8.0.rc2.1.gbe9624a
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