Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-10-24 14:10:59 +00:00
Code Issues Packages Projects Releases Wiki Activity

netfilter: nfnetlink_queue: only add CAP_LEN attr when needed

Browse Source 
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>
This commit is contained in:
Florian Westphal 2013-06-04 22:22:16 +00:00 committed by Pablo Neira Ayuso
parent 9cefbbc9c8
commit 7f87712c01
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
net/netfilter/nfnetlink_queue_core.c
View File

@ -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))