From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Thu, 1 Feb 2024 19:09:41 +0000 (+0100)
Subject: lib/cpuset: exit early from cpulist_parse
X-Git-Tag: v2.41-start~10
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=566b1d348897a34016653d6de040688a2c0a136c;p=thirdparty%2Futil-linux.git

lib/cpuset: exit early from cpulist_parse

If `a` exceeds `max`, any increment of `a` will also `exceed` max.
In this case the CPU_SET_S will never do anything all additional loops
are wasted.

Fixes #2748

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
---

diff --git a/lib/cpuset.c b/lib/cpuset.c
index 643537f6d9..533b8ab309 100644
--- a/lib/cpuset.c
+++ b/lib/cpuset.c
@@ -326,8 +326,12 @@ int cpulist_parse(const char *str, cpu_set_t *set, size_t setsize, int fail)
 		if (!(a <= b))
 			return 1;
 		while (a <= b) {
-			if (fail && (a >= max))
-				return 2;
+			if (a >= max) {
+				if (fail)
+					return 2;
+				else
+					break;
+			}
 			CPU_SET_S(a, setsize, set);
 			a += s;
 		}