diff options
| author | Florian Westphal <fw@strlen.de> | 2016-04-01 14:17:25 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-08-22 22:38:29 +0100 |
| commit | b58ceab2ddb76114c22da82003567a146aa02412 (patch) | |
| tree | 538f1b38cac4cf2be2ae9a3b838d75144224a1a1 | |
| parent | 30a24c66372a0606e9f11bf760e432b643a36fb8 (diff) | |
netfilter: x_tables: assert minimum target size
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: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | net/netfilter/x_tables.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c index 2ad520ccd006..1e2ff82d5bf7 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; |