[PATCH nf 1/2] netfilter: nfnetlink_hook: use the sequence number of the request message

[Pablo Neira Ayuso <pablo@netfilter.org>]

The sequence number allows to correlate the netlink reply message (as
part of the dump) with the original request message.

The cb->seq field is internally used to detect an interference (update)
of the hook list during the netlink dump, do not use it as sequence
number in the netlink dump header.

Fixes: e2cf17d3774c ("netfilter: add new hook nfnl subsystem")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nfnetlink_hook.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nfnetlink_hook.c b/net/netfilter/nfnetlink_hook.c
index 30fe94477f8d..f204752ba4a4 100644
--- a/net/netfilter/nfnetlink_hook.c
+++ b/net/netfilter/nfnetlink_hook.c
@@ -262,7 +262,8 @@ static int nfnl_hook_dump(struct sk_buff *nlskb,
 	ops = nf_hook_entries_get_hook_ops(e);
 
 	for (; i < e->num_hook_entries; i++) {
-		err = nfnl_hook_dump_one(nlskb, ctx, ops[i], cb->seq);
+		err = nfnl_hook_dump_one(nlskb, ctx, ops[i],
+					 cb->nlh->nlmsg_seq);
 		if (err)
 			break;
 	}
-- 
2.20.1