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From: Xin Long <lucien.xin@gmail.com>
To: network dev <netdev@vger.kernel.org>, linux-sctp@vger.kernel.org
Cc: davem@davemloft.net,
	Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>,
	Neil Horman <nhorman@tuxdriver.com>
Subject: [PATCH net] sctp: use the old asoc when making the cookie-ack chunk in dupcook_d
Date: Wed,  2 May 2018 13:39:46 +0800	[thread overview]
Message-ID: <b4d64902d4a8e0774c44752056e35a32d69966a9.1525239586.git.lucien.xin@gmail.com> (raw)

When processing a duplicate cookie-echo chunk, for case 'D', sctp will
not process the param from this chunk. It means old asoc has nothing
to be updated, and the new temp asoc doesn't have the complete info.

So there's no reason to use the new asoc when creating the cookie-ack
chunk. Otherwise, like when auth is enabled for cookie-ack, the chunk
can not be set with auth, and it will definitely be dropped by peer.

This issue is there since very beginning, and we fix it by using the
old asoc instead.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 net/sctp/sm_statefuns.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 98acfed..28c070e 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -2056,7 +2056,7 @@ static enum sctp_disposition sctp_sf_do_dupcook_d(
 		}
 	}
 
-	repl = sctp_make_cookie_ack(new_asoc, chunk);
+	repl = sctp_make_cookie_ack(asoc, chunk);
 	if (!repl)
 		goto nomem;
 
-- 
2.1.0

WARNING: multiple messages have this Message-ID (diff)
From: Xin Long <lucien.xin@gmail.com>
To: network dev <netdev@vger.kernel.org>, linux-sctp@vger.kernel.org
Cc: davem@davemloft.net,
	Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>,
	Neil Horman <nhorman@tuxdriver.com>
Subject: [PATCH net] sctp: use the old asoc when making the cookie-ack chunk in dupcook_d
Date: Wed, 02 May 2018 05:39:46 +0000	[thread overview]
Message-ID: <b4d64902d4a8e0774c44752056e35a32d69966a9.1525239586.git.lucien.xin@gmail.com> (raw)

When processing a duplicate cookie-echo chunk, for case 'D', sctp will
not process the param from this chunk. It means old asoc has nothing
to be updated, and the new temp asoc doesn't have the complete info.

So there's no reason to use the new asoc when creating the cookie-ack
chunk. Otherwise, like when auth is enabled for cookie-ack, the chunk
can not be set with auth, and it will definitely be dropped by peer.

This issue is there since very beginning, and we fix it by using the
old asoc instead.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 net/sctp/sm_statefuns.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 98acfed..28c070e 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -2056,7 +2056,7 @@ static enum sctp_disposition sctp_sf_do_dupcook_d(
 		}
 	}
 
-	repl = sctp_make_cookie_ack(new_asoc, chunk);
+	repl = sctp_make_cookie_ack(asoc, chunk);
 	if (!repl)
 		goto nomem;
 
-- 
2.1.0


             reply	other threads:[~2018-05-02  5:39 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-02  5:39 Xin Long [this message]
2018-05-02  5:39 ` [PATCH net] sctp: use the old asoc when making the cookie-ack chunk in dupcook_d Xin Long
2018-05-02 11:46 ` Neil Horman
2018-05-02 11:46   ` Neil Horman
2018-05-02 12:04 ` Marcelo Ricardo Leitner
2018-05-02 12:04   ` Marcelo Ricardo Leitner
2018-05-02 15:16 ` David Miller
2018-05-02 15:16   ` David Miller

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