4.6-stable review patch. If anyone has any objections, please let me know.
------------------ From: Florian Westphal <[email protected]> commit a08e4e190b866579896c09af59b3bdca821da2cd upstream. The target size includes the size of the xt_entry_target struct. Signed-off-by: Florian Westphal <[email protected]> Signed-off-by: Pablo Neira Ayuso <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/netfilter/x_tables.c | 3 +++ 1 file changed, 3 insertions(+) --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -568,6 +568,9 @@ 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;
