From: David Carlier <devnexen@gmail.com>
Date: Wed, 11 Feb 2026 21:52:13 +0000 (+0000)
Subject: tools/sched_ext: scx_flatcg: zero-initialize stats counter array
X-Git-Tag: v7.0-rc1~21^2~9
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=11fece49e956ef97318177f5af15a84317594244;p=thirdparty%2Flinux.git

tools/sched_ext: scx_flatcg: zero-initialize stats counter array

The local cnts array in read_stats() is not initialized before being
accumulated into per-CPU stats, which may lead to reading garbage
values. Zero it out with memset alongside the existing stats array
initialization.

Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
---

diff --git a/tools/sched_ext/scx_flatcg.c b/tools/sched_ext/scx_flatcg.c
index cd85eb4011793..bea76d0602014 100644
--- a/tools/sched_ext/scx_flatcg.c
+++ b/tools/sched_ext/scx_flatcg.c
@@ -106,6 +106,7 @@ static void fcg_read_stats(struct scx_flatcg *skel, __u64 *stats)
 	__u32 idx;
 
 	memset(stats, 0, sizeof(stats[0]) * FCG_NR_STATS);
+	memset(cnts, 0, sizeof(cnts));
 
 	for (idx = 0; idx < FCG_NR_STATS; idx++) {
 		int ret, cpu;