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| author | Florian Westphal <fw@strlen.de> | 2016-04-01 14:17:25 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-24 10:22:05 -0700 |
| commit | 3902b6dcc704a07dbf79df7ba3cab990b808b6de (patch) | |
| tree | 30b8f90c0bdf12ce41c7327b25b4614f0ec2009c | |
| parent | 23b109710e1b3223c1a581016fbdbf475346a539 (diff) | |
| download | lwn-3902b6dcc704a07dbf79df7ba3cab990b808b6de.tar.gz lwn-3902b6dcc704a07dbf79df7ba3cab990b808b6de.zip | |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 1f44bfa8dd94..ec1b7183fff9 100644 --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -568,6 +568,9 @@ 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; |