netdev - [PATCH iproute2] ss: fix autobound filter

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Date:	Fri, 17 Jun 2011 15:21:51 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [PATCH iproute2] ss: fix autobound filter

Fixes following error. We currently provide garbage data to kernel, that
can abort the validation process or produce unexpected results.

$ ss -a autobound
State      Recv-Q Send-Q      Local Address:Port          Peer Address:Port   
TCPDIAG answers: Invalid argument

After patch:

$ misc/ss -a autobound 
State      Recv-Q Send-Q      Local Address:Port          Peer Address:Port   
LISTEN     0      128                     *:44624                    *:*       
ESTAB      0      0            192.168.1.21:47141        74.125.79.109:imaps   

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
 misc/ss.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/misc/ss.c b/misc/ss.c
index 482b6bb..4033e92 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -803,7 +803,7 @@ static int ssfilter_bytecompile(struct ssfilter *f, char **bytecode)
 	{
 		if (!(*bytecode=malloc(4))) abort();
 		((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_AUTO, 4, 8 };
-		return 8;
+		return 4;
 	}
 		case SSF_DCOND:
 		case SSF_SCOND:


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