From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 B3E1B52120F; Wed, 30 Sep 2026 18:00:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790791253; cv=none; b=tT+RZbMdWeRwnFZFui7gnzEG7s3aRdxGLhov6ZxTU8pmvKKSkwXhRT6w3Dtf9lMxEC3tHsSzfrg2Fg3Ua9dzO7n22oXsvEqk4bcoPj8dcEfihRGyCT3Isj7XgF423uYVVFoX/BG6fUSb5VizKeMVZOZFett2KmkA1086dwyCO1A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790791253; c=relaxed/simple; bh=E0WnRG3w397+X8zNYq9EePW6dj2tERLcjJIThCfDy+U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qB83T6NweHwV7ol8rP73qlxVgBV/3xcZYMAvIzS6g6Cq2mYEwKRMWF1VR92iP1juzG9hV3btgVtoZqp4gAM6q4APSX7rmKBFFPamv41X+4emqmde3IjAW6cfKRHViCE4lhdFkKwNh4tz2HvfBO9BXhoxN65SSboZtl0t4zTRwOA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xCb4k+yC; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xCb4k+yC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1CD9A1F000FF; Wed, 30 Sep 2026 18:00:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790791252; bh=bAB6coD0fp0fQBw6ZBBa3ShLJ/ffkv2/8+e0LYVlo1Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=xCb4k+yCT7hfFe0qs6wf0ojvWtyipzr1ngsg83FPTwnj5pCWexSJ6nCYpfQtrFxRn tp1KOAG7hKMxF9ISouuhr4FEdkQVZDKNj/MRu6T+64dSm71GlT+Zuq1PFAmcr9gIxc 4KmOu+cpHCr/Y+9Y8lIObjOZcZiQalG00eEPt9AQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jad Keskes , "Borislav Petkov (AMD)" , Sasha Levin Subject: [PATCH 5.15 238/752] EDAC/device_sysfs: Use kstrtouint() for poll_msec to prevent truncation Date: Wed, 30 Sep 2026 17:21:48 +0200 Message-ID: <20260930152403.417413512@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152358.131179731@linuxfoundation.org> References: <20260930152358.131179731@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jad Keskes [ Upstream commit 66cc9dec919dd63d8e4b3d386f7aed3ae684e645 ] The poll_msec sysfs store file uses simple_strtoul() which accepts an unsigned long, but the target field (poll_msec) is unsigned int. On 64-bit systems, a value > UINT_MAX is silently truncated when stored. Fix the mismatch by using kstrtouint() instead. This rejects values larger than UINT_MAX at parse time, making truncation impossible. Also add a check for value < 1 to reject the 0-delay case, which would cause the poll work to spin without delay and consume 100% CPU. Fixes: e27e3dac6517 ("drivers/edac: add edac_device class") Signed-off-by: Jad Keskes Signed-off-by: Borislav Petkov (AMD) Link: https://patch.msgid.link/20260730145549.148229-1-inasj268@gmail.com Signed-off-by: Sasha Levin --- drivers/edac/edac_device_sysfs.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/edac/edac_device_sysfs.c b/drivers/edac/edac_device_sysfs.c index 5e75937537997..b943223691164 100644 --- a/drivers/edac/edac_device_sysfs.c +++ b/drivers/edac/edac_device_sysfs.c @@ -90,14 +90,21 @@ static ssize_t edac_device_ctl_poll_msec_store(struct edac_device_ctl_info *ctl_info, const char *data, size_t count) { - unsigned long value; + unsigned int value; + int ret; /* get the value and enforce that it is non-zero, must be at least * one millisecond for the delay period, between scans * Then cancel last outstanding delay for the work request * and set a new one. */ - value = simple_strtoul(data, NULL, 0); + ret = kstrtouint(data, 0, &value); + if (ret < 0) + return ret; + + if (value < 1) + return -EINVAL; + edac_device_reset_delay_period(ctl_info, value); return count; -- 2.53.0