From: Vlad Yasevich <vladislav.yasevich@hp.com>
Date: Thu, 29 Nov 2007 13:56:16 +0000 (-0500)
Subject: SCTP: Fix chunk acceptance when no authenticated chunks were listed.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=555d3d5d2be13675490a80df0d7961551822ef1f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

SCTP: Fix chunk acceptance when no authenticated chunks were listed.

In the case where no autheticated chunks were specified, we were still
trying to verify that a given chunk needs authentication and doing so
incorrectly.  Add a check for parameter length to make sure we don't
try to use an empty auth_chunks parameter to verify against.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
---

diff --git a/net/sctp/auth.c b/net/sctp/auth.c
index 6d5fa6bb371b..6d89e35307aa 100644
--- a/net/sctp/auth.c
+++ b/net/sctp/auth.c
@@ -631,7 +631,7 @@ static int __sctp_auth_cid(sctp_cid_t chunk, struct sctp_chunks_param *param)
 	int found = 0;
 	int i;
 
-	if (!param)
+	if (!param || param->param_hdr.length == 0)
 		return 0;
 
 	len = ntohs(param->param_hdr.length) - sizeof(sctp_paramhdr_t);