netdev - [PATCH net-next-2.6 1/9] sctp: check parameter value of length in ERROR chunk

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Date:	Wed, 20 Apr 2011 15:25:40 +0800
From:	Wei Yongjun <yjwei@...fujitsu.com>
To:	David Miller <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	lksctp <linux-sctp@...r.kernel.org>
Subject: [PATCH net-next-2.6 1/9] sctp: check parameter value of length in
 ERROR chunk

From: Shan Wei <shanwei@...fujitsu.com>

When an endpoint receives ERROR that parameter value is invalid,
send an ABORT to peer with a Protocol Violation error code.

Signed-off-by: Shan Wei <shanwei@...fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@...com>
Signed-off-by: Wei Yongjun <yjwei@...fujitsu.com>
---
 net/sctp/sm_statefuns.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index c085472..fe2036d 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3204,6 +3204,7 @@ sctp_disposition_t sctp_sf_operr_notify(const struct sctp_endpoint *ep,
 					sctp_cmd_seq_t *commands)
 {
 	struct sctp_chunk *chunk = arg;
+	sctp_errhdr_t *err;
 
 	if (!sctp_vtag_verify(chunk, asoc))
 		return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
@@ -3212,6 +3213,10 @@ sctp_disposition_t sctp_sf_operr_notify(const struct sctp_endpoint *ep,
 	if (!sctp_chunk_length_valid(chunk, sizeof(sctp_operr_chunk_t)))
 		return sctp_sf_violation_chunklen(ep, asoc, type, arg,
 						  commands);
+	sctp_walk_errors(err, chunk->chunk_hdr);
+	if ((void *)err != (void *)chunk->chunk_end)
+		return sctp_sf_violation_paramlen(ep, asoc, type, arg,
+						  (void *)err, commands);
 
 	sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_OPERR,
 			SCTP_CHUNK(chunk));
-- 
1.6.5.2


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