[PATCH] SCTP: Fix possible memory leak while process INIT chunk with AUTH paramters

[Wei Yongjun <yjwei@cn.fujitsu.com>]

While endpoint received INIT/INIT-ACK chunk with AUTH parameters, such 
as RANDOM, HMAC_ALGO, CHUNKS parameter, if those parameters appear more 
then once, memory for store those parameters will be malloc more then 
once and not free.

This patch change to used the first parameter and ignore the others.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>

--- a/net/sctp/sm_make_chunk.c	2008-02-11 17:14:05.000000000 -0500
+++ b/net/sctp/sm_make_chunk.c	2008-02-14 03:57:58.000000000 -0500
@@ -2458,6 +2458,9 @@ static int sctp_process_param(struct sct
 		if (!sctp_auth_enable)
 			goto fall_through;
 
+		if (asoc->peer.peer_random)
+			break;
+
 		/* Save peer's random parameter */
 		asoc->peer.peer_random = kmemdup(param.p,
 					    ntohs(param.p->length), gfp);
@@ -2471,6 +2474,9 @@ static int sctp_process_param(struct sct
 		if (!sctp_auth_enable)
 			goto fall_through;
 
+		if (asoc->peer.peer_hmacs) 
+			break;
+
 		/* Save peer's HMAC list */
 		asoc->peer.peer_hmacs = kmemdup(param.p,
 					    ntohs(param.p->length), gfp);
@@ -2487,6 +2493,9 @@ static int sctp_process_param(struct sct
 		if (!sctp_auth_enable)
 			goto fall_through;
 
+		if (asoc->peer.peer_chunks)
+			break;
+
 		asoc->peer.peer_chunks = kmemdup(param.p,
 					    ntohs(param.p->length), gfp);
 		if (!asoc->peer.peer_chunks)