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From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org, kuba@kernel.org
Subject: [PATCH net 6/9] netfilter: nfnetlink_hook: use the sequence number of the request message
Date: Fri,  6 Aug 2021 13:52:04 +0200	[thread overview]
Message-ID: <20210806115207.2976-7-pablo@netfilter.org> (raw)
In-Reply-To: <20210806115207.2976-1-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 e0ff2973fd14..7b0d4a317457 100644
--- a/net/netfilter/nfnetlink_hook.c
+++ b/net/netfilter/nfnetlink_hook.c
@@ -264,7 +264,8 @@ 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


  parent reply	other threads:[~2021-08-06 11:52 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-06 11:51 [PATCH net 0/9] Netfilter fixes for net Pablo Neira Ayuso
2021-08-06 11:51 ` [PATCH net 1/9] netfilter: ipset: Limit the maximal range of consecutive elements to add/delete Pablo Neira Ayuso
2021-08-06 11:52 ` [PATCH net 2/9] netfilter: nf_conntrack_bridge: Fix memory leak when error Pablo Neira Ayuso
2021-08-06 11:52 ` [PATCH net 3/9] netfilter: conntrack: collect all entries in one cycle Pablo Neira Ayuso
2021-08-06 13:27   ` Jakub Kicinski
2021-08-06 14:59     ` Pablo Neira Ayuso
2021-08-06 15:06       ` Jakub Kicinski
2021-08-06 11:52 ` [PATCH net 4/9] netfilter: nfnetlink_hook: strip off module name from hookfn Pablo Neira Ayuso
2021-08-06 11:52 ` [PATCH net 5/9] netfilter: nfnetlink_hook: missing chain family Pablo Neira Ayuso
2021-08-06 11:52 ` Pablo Neira Ayuso [this message]
2021-08-06 11:52 ` [PATCH net 7/9] netfilter: nfnetlink_hook: Use same family as request message Pablo Neira Ayuso
2021-08-06 11:52 ` [PATCH net 8/9] netfilter: conntrack: remove offload_pickup sysctl again Pablo Neira Ayuso
2021-08-06 11:52 ` [PATCH net 9/9] netfilter: nfnetlink_hook: translate inet ingress to netdev Pablo Neira Ayuso
2021-08-06 15:11 [PATCH net 0/9,v2] Netfilter fixes for net Pablo Neira Ayuso
2021-08-06 15:11 ` [PATCH net 6/9] netfilter: nfnetlink_hook: use the sequence number of the request message Pablo Neira Ayuso

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