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 401ADDDB5; Tue, 23 Jan 2024 00:03:11 +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=1705968191; cv=none; b=Qh8UaHI5afsKIC9DsnUonSDK1I+f0Ynl2EaYGAc7Aq2+A20idA29nINKVMS1wfmorlY/R6ty9b6h93Q7g/g+0Br2Lj4BdcdtqXssJN0mdoqlBW7VxtvOoOtRfwkk/WoA3/6X/2qJE5HeZ5jqsFC5MHq+3WfH+FfYF5jUjVsScNs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705968191; c=relaxed/simple; bh=ZKMJGGsdUu7FpyQxsyLgl5t3/7hO0kwGR5On6mTJhVM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gfHjlS3kjuFS3oaSS9D0wCXRJA/zGqgT27hkib0dSZNBk4zmFeyp8A2ICC22jgiw4kOQOYfrrwBxxe7Hocl8F6jq4rtz1GO/E35essRSIH02H12AlDOGQDDFwVjOOoP2D/5aZVvp6YjTTljY1Wwl7W/I7Wch5glUfkqAX2OkFXo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=OjW4QSdU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="OjW4QSdU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1869C433F1; Tue, 23 Jan 2024 00:03:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1705968191; bh=ZKMJGGsdUu7FpyQxsyLgl5t3/7hO0kwGR5On6mTJhVM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OjW4QSdUwFopZ/P4s+AnMSoWqmf9E0TE9eyQEgpmwQjT6qUkOkpdHZWVBuQ5NC7Vy 3rEAeYqcgxblcwpoEIJBV5DvCsMHoT11OuWrs+DpWIra/300wqeCcBTh8Jeer5jp4h 95zmud3NyOZ6NHntSCGDJyzepzKJ7CU1Xa2gFL1k= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nikita Kiryushin , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 4.19 039/148] ACPI: LPIT: Avoid u32 multiplication overflow Date: Mon, 22 Jan 2024 15:56:35 -0800 Message-ID: <20240122235713.992727729@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240122235712.442097787@linuxfoundation.org> References: <20240122235712.442097787@linuxfoundation.org> User-Agent: quilt/0.67 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 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nikita Kiryushin [ Upstream commit 56d2eeda87995245300836ee4dbd13b002311782 ] In lpit_update_residency() there is a possibility of overflow in multiplication, if tsc_khz is large enough (> UINT_MAX/1000). Change multiplication to mul_u32_u32(). Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: eeb2d80d502a ("ACPI / LPIT: Add Low Power Idle Table (LPIT) support") Signed-off-by: Nikita Kiryushin Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/acpi_lpit.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/acpi_lpit.c b/drivers/acpi/acpi_lpit.c index e43cb71b6972..c39c56904c52 100644 --- a/drivers/acpi/acpi_lpit.c +++ b/drivers/acpi/acpi_lpit.c @@ -106,7 +106,7 @@ static void lpit_update_residency(struct lpit_residency_info *info, struct acpi_lpit_native *lpit_native) { info->frequency = lpit_native->counter_frequency ? - lpit_native->counter_frequency : tsc_khz * 1000; + lpit_native->counter_frequency : mul_u32_u32(tsc_khz, 1000U); if (!info->frequency) info->frequency = 1; -- 2.43.0