From nobody Sat Jul 4 19:55:32 2026 Received: from confino.investici.org (confino.investici.org [93.190.126.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ED4151DED40 for ; Sat, 4 Jul 2026 17:48:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=93.190.126.19 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783187333; cv=none; b=YcXfH9ZWpv1IroTy1v3hshemwQ51CpmdFVbvlKEhwFSNajnWCADcBAEofgV+AimBbWh3OhuljCQH9JBl7xfJYRo9Pblo+LaRLt+1pGz3cgTH2UZ2Z/TgFxTuuJI+IFiaVV3tSEQYzYxHtJZJRDdm0tPtRb9dEdvt3lYVNQ7ZEy4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783187333; c=relaxed/simple; bh=kfo4cAJ0v7ZuMcwcfzDJ0BPvtQ2VCfu3TUZhiTOo1v0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ef28BvWJNpqgg2fKWjaaxmG/eVDzxhXIktZ7KY61SiPnOkCKLYvaL/i2C1TFpQg3x+VHXPvSK9Jm1J/FRqGYpYkPLd8CmhAuaWDavf/Hm7agjBQXelAUZR5hyAQ6tWSK4DMJGS3RD8tDimlz90bEW9zivq20kCIke3MMJW5sREs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=grrlz.net; spf=pass smtp.mailfrom=grrlz.net; dkim=pass (1024-bit key) header.d=grrlz.net header.i=@grrlz.net header.b=gqq84jUK; arc=none smtp.client-ip=93.190.126.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=grrlz.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=grrlz.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=grrlz.net header.i=@grrlz.net header.b="gqq84jUK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=grrlz.net; s=stigmate; t=1783187322; bh=e8/VhVYATRhF9msFBS5T/311e+R4Hc2I5ns0za+hioU=; h=From:To:Cc:Subject:Date:From; b=gqq84jUKuXUtcJfkeXsHRHnbydNAsf75E0lY5ayXZRZers22gxS1UIOBfVGYC15il +AGji33apirH0cw/iYR/m2mflf0nRFpP6Is+0KuxGVtC7UgjgKCrHbYVwB8UznADpg zlCMPjBPIiMPunmFIhgj5klm4mJiYj3McjOULXUo= Received: from mx1.investici.org (unknown [127.0.0.1]) by confino.investici.org (Postfix) with ESMTP id 4gsylt70zbz10yr; Sat, 04 Jul 2026 17:48:42 +0000 (UTC) Received: by mx1.investici.org (Postfix) id 4gsylt4D4zz10xD; Sat, 04 Jul 2026 17:48:42 +0000 (UTC) From: Bradley Morgan To: Thomas Gleixner , Peter Zijlstra Cc: linux-kernel@vger.kernel.org Subject: [PATCH] cpu/hotplug: Use sysfs_emit_at() in states_show() Date: Sat, 4 Jul 2026 17:48:42 +0000 Message-ID: <20260704174842.15015-1-include@grrlz.net> X-Mailer: git-send-email 2.53.0 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" Replace raw sprintf() and manual buffer arithmetic with sysfs_emit_at(), which bounds output to PAGE_SIZE. Signed-off-by: Bradley Morgan --- kernel/cpu.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/kernel/cpu.c b/kernel/cpu.c index f975bb34915b..25d88cf2bb15 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -2857,18 +2857,15 @@ static const struct attribute_group cpuhp_cpu_attr_= group =3D { static ssize_t states_show(struct device *dev, struct device_attribute *attr, char *buf) { - ssize_t cur, res =3D 0; + ssize_t res =3D 0; int i; =20 mutex_lock(&cpuhp_state_mutex); for (i =3D CPUHP_OFFLINE; i <=3D CPUHP_ONLINE; i++) { struct cpuhp_step *sp =3D cpuhp_get_step(i); =20 - if (sp->name) { - cur =3D sprintf(buf, "%3d: %s\n", i, sp->name); - buf +=3D cur; - res +=3D cur; - } + if (sp->name) + res +=3D sysfs_emit_at(buf, res, "%3d: %s\n", i, sp->name); } mutex_unlock(&cpuhp_state_mutex); return res; --=20 2.53.0