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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 10:15:30 -0700 |
| commit | 412f0324bf5f7d719ee0cf8d9610745b1a11cb7b (patch) | |
| tree | 9c9a7418ebbddba71502e5e6976adddb9a1b3202 | |
| parent | c7118d93d1a761b156e282bce9d11850eec7ac3b (diff) | |
| download | lwn-412f0324bf5f7d719ee0cf8d9610745b1a11cb7b.tar.gz lwn-412f0324bf5f7d719ee0cf8d9610745b1a11cb7b.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 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; |