From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Fri, 9 Sep 2011 09:19:32 +0000 (+0200)
Subject: lib,cpuset: fix stride handling in cpulist_parse()
X-Git-Tag: v2.21-rc1~436
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=72232a267a8b021c5170419062f8ae831f18ca0e;p=thirdparty%2Futil-linux.git

lib,cpuset: fix stride handling in cpulist_parse()

If cpulist_parse() gets passed a cpu list with a stride value of 0 it will be
stuck in an endless loop.  E.g. the following cpu list will cause an endless
loop: "0-2:0".  Fix this by causing a parse error if the stride value is 0.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
---

diff --git a/lib/cpuset.c b/lib/cpuset.c
index cf22aa7786..85927553ee 100644
--- a/lib/cpuset.c
+++ b/lib/cpuset.c
@@ -292,6 +292,8 @@ int cpulist_parse(const char *str, cpu_set_t *set, size_t setsize, int fail)
 			if (c1 != NULL && (c2 == NULL || c1 < c2)) {
 				if (sscanf(c1, "%u", &s) < 1)
 					return 1;
+				if (s == 0)
+					return 1;
 			}
 		}