| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.14 24/29] netfilter: x_tables: assert minimum target size | Date | Wed, 22 Jun 2016 15:37:32 -0700 |
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3.14-stable review patch. If anyone has any objections, please let me know.
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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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- net/netfilter/x_tables.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -587,6 +587,9 @@ int xt_check_entry_offsets(const void *b 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;
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