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[188.141.5.72]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4834d482480sm180176805e9.0.2026.02.11.13.52.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Feb 2026 13:52:17 -0800 (PST) From: David Carlier To: Tejun Heo , David Vernet Cc: linux-kernel@vger.kernel.org, David Carlier Subject: [PATCH] tools/sched_ext: scx_nest: zero-initialize stats counter array Date: Wed, 11 Feb 2026 21:52:13 +0000 Message-ID: <20260211215213.917724-1-devnexen@gmail.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- tools/sched_ext/scx_flatcg.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/sched_ext/scx_flatcg.c b/tools/sched_ext/scx_flatcg.c index cd85eb401179..bea76d060201 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, __u= 64 *stats) __u32 idx; =20 memset(stats, 0, sizeof(stats[0]) * FCG_NR_STATS); + memset(cnts, 0, sizeof(cnts)); =20 for (idx =3D 0; idx < FCG_NR_STATS; idx++) { int ret, cpu; --=20 2.51.0