diff options
| author | Florian Westphal <fw@strlen.de> | 2013-06-04 22:22:16 +0000 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2013-06-05 12:40:54 +0200 |
| commit | 7f87712c0152511a1842698ad8dca425fee2dc4f (patch) | |
| tree | bf8da1c03b04c720afa10f96a210a2df17f980db | |
| parent | 9cefbbc9c8f9abe0bc514dcfca46e8051ee84050 (diff) | |
netfilter: nfnetlink_queue: only add CAP_LEN attr when needed
CAP_LEN contains the size of the network packet we're queueing to
userspace, i.e. normally it is the same as the NFQA_PAYLOAD attribute len.
Include it only in the unlikely case when NFQA_PAYLOAD is truncated due
to copy_range limitations.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | net/netfilter/nfnetlink_queue_core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/netfilter/nfnetlink_queue_core.c b/net/netfilter/nfnetlink_queue_core.c index 3c4218141d70..eb2cde836b9a 100644 --- a/net/netfilter/nfnetlink_queue_core.c +++ b/net/netfilter/nfnetlink_queue_core.c @@ -472,7 +472,8 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue, if (ct && nfqnl_ct_put(skb, ct, ctinfo) < 0) goto nla_put_failure; - if (cap_len > 0 && nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len))) + if (cap_len > data_len && + nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len))) goto nla_put_failure; if (nfqnl_put_packet_info(skb, entskb)) |