From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 0217F1A57D1; Thu, 1 Aug 2024 00:26:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722471967; cv=none; b=gpPI/j4HnU4odZ2xKafXFyEJimGVSy51tntWchhnZmAl6p8ZbTscdaVObRxKRJfZ9KWHMc/5ivKFjsl9gDYMwMd+Yw4wOexshPnqOnhY5B+Wwh5n3efLnK/D8hQCfXSkV+pZRbTkiy6C7X6NY+lhM23EKsGp5MNIFv8Lnllojfc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722471967; c=relaxed/simple; bh=EnUEvHvbyAQWtZYVX6zVsMAma+OH+8r/lAB2a2IlOU8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=P7cqoFyQ56gTzL4mCShEyPxwBWk/weKK5dSk3h2c3MI37F9CII8WAiMzz+0v5W+x5knWnn7K5kdS9pZfxwAQJe3xGOlf9sVLRG4xYGbupBZh6DLD257wsrSkjZ9z6EsNjhBn4rqFLIvZR3pK8iFia/3pvVQqQ7VOBk22rwuu6F4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YQEXEjXR; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YQEXEjXR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C5EDEC4AF0E; Thu, 1 Aug 2024 00:26:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722471966; bh=EnUEvHvbyAQWtZYVX6zVsMAma+OH+8r/lAB2a2IlOU8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YQEXEjXR5LUeLcf+BKoAG8A/4a7RvlS5Nmbbai9y6JI/4zjw7XEheZGwV8dBSjxx/ yKtTZfnb0k5Qiqup7UVc+bar+4E2jMNPAryWHddKLt3fdeeIF4rtGQWUJPp+WzcSPd /PnLayYinUPhp2Grvw84s4nZaAwH50FioY3I0TDMtx9zdtMVLfKgEHD8eDpRAbCdhL SgdPIBycYjqUFuGQVU6Yy3f4T0qnioGCZPqXoKscR4G3qWS9MVBgfd8Ry3WxufxY+u Y4M2h/qBSAB3JFt7Ab2sFY6b1FZmBcs5Q6Vb3QFHBT0vz9EAHeP65Q+GxmFvReWsWJ ES7+wam9kGFZw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Guenter Roeck , Sasha Levin , jdelvare@suse.com, linux-hwmon@vger.kernel.org Subject: [PATCH AUTOSEL 6.6 80/83] hwmon: (w83627ehf) Fix underflows seen when writing limit attributes Date: Wed, 31 Jul 2024 20:18:35 -0400 Message-ID: <20240801002107.3934037-80-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240801002107.3934037-1-sashal@kernel.org> References: <20240801002107.3934037-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.43 Content-Transfer-Encoding: 8bit From: Guenter Roeck [ Upstream commit 5c1de37969b7bc0abcb20b86e91e70caebbd4f89 ] DIV_ROUND_CLOSEST() after kstrtol() results in an underflow if a large negative number such as -9223372036854775808 is provided by the user. Fix it by reordering clamp_val() and DIV_ROUND_CLOSEST() operations. Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin --- drivers/hwmon/w83627ehf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c index fe960c0a624f7..7d7d70afde655 100644 --- a/drivers/hwmon/w83627ehf.c +++ b/drivers/hwmon/w83627ehf.c @@ -895,7 +895,7 @@ store_target_temp(struct device *dev, struct device_attribute *attr, if (err < 0) return err; - val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 127); + val = DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000); mutex_lock(&data->update_lock); data->target_temp[nr] = val; @@ -920,7 +920,7 @@ store_tolerance(struct device *dev, struct device_attribute *attr, return err; /* Limit the temp to 0C - 15C */ - val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 0, 15); + val = DIV_ROUND_CLOSEST(clamp_val(val, 0, 15000), 1000); mutex_lock(&data->update_lock); reg = w83627ehf_read_value(data, W83627EHF_REG_TOLERANCE[nr]); -- 2.43.0