From: Sami Kerola <kerolasa@iki.fi>
Date: Sat, 22 Nov 2014 08:13:59 +0000 (+0000)
Subject: fdisk: (sgi) fix unsigned integer overflow [AddressSanitizer]
X-Git-Tag: v2.26-rc1~120
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=737532efe5a931cf452564624da430ee8e2110eb;p=thirdparty%2Futil-linux.git

fdisk: (sgi) fix unsigned integer overflow [AddressSanitizer]

include/pt-sgi.h:103:7: runtime error: unsigned integer overflow: 0 -
1186450447 cannot be represented in type 'unsigned int'

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---

diff --git a/include/pt-sgi.h b/include/pt-sgi.h
index 15f355b84c..547b37a872 100644
--- a/include/pt-sgi.h
+++ b/include/pt-sgi.h
@@ -99,8 +99,10 @@ static inline uint32_t sgi_pt_checksum(struct sgi_disklabel *label)
 
 	i = sizeof(*label) / sizeof(*ptr);
 
-	while (i--)
+	while (i) {
+		i--;
 		sum -= be32_to_cpu(ptr[i]);
+	}
 
 	return sum;
 }