linux-kernel - [PATCH 2/7] Handle snprintf calculation in stackglue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <ed33087d-fc38-e6c5-2633-0d6f7c3877c5@x41-dsec.de>
Date:   Wed, 11 Oct 2017 10:28:26 +0200
From:   Eric Sesterhenn <eric.sesterhenn@...-dsec.de>
To:     linux-kernel@...r.kernel.org
Subject: [PATCH 2/7] Handle snprintf calculation in stackglue


snprintf can return a value bigger than remain if the string does not fit.

Signed-off-by: Eric Sesterhenn <eric.sesterhenn@...-dsec.de>
---
 fs/ocfs2/stackglue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index d6c350ba25b9..b00d67b4cf43 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -520,7 +520,7 @@ static ssize_t
ocfs2_loaded_cluster_plugins_show(struct kobject *kobj,
 			total = ret;
 			break;
 		}
-		if (ret == remain) {
+		if (ret >= remain) {
 			/* snprintf() didn't fit */
 			total = -E2BIG;
 			break;
-- 
Eric Sesterhenn (Principal Security Consultant)
X41 D-SEC GmbH, Dennewartstr. 25-27, D-52068 Aachen
T: +49 241 9809418-0, Fax: -9
Unternehmenssitz: Aachen, Amtsgericht Aachen: HRB19989
Geschäftsführer: Markus Vervier



Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)