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 465501F0E42; Tue, 11 Feb 2025 01:31:02 +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=1739237462; cv=none; b=CGZX6M4ZUncE2TASsQfCV+GQ9si0VPWwgcRKxjGwh+LMKl87v809tqsCToA0L1CRn0rCxIWFmfAyCQZZNuwrImgJz+ZDHcJR3WXKXo+XX1s4jXXUFpE/h24xHgIqdCeQLPkFqkPpJTMsNn13SX22aWIcz+s3DZ5tZ3WAudDjhMM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739237462; c=relaxed/simple; bh=bjvXG49dTpKT0QJS7J3gn7tqEEJFTEJiy5VTXshl5+E=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=FyLA1I7A3iyXhcj27tzuB4qm3GfmjKbShsr9/WaRzvqgwsW3tzCGa8+0ytsQm2PHjoF/C5Al6C6yGn170nDd8X+u4zLbR3WbUenDefXhFjo3uk2Hpt9ShiCZOyTEf/LzhI4K0AQi1KUuNjLQXmOn86zVDifqyfY3eRzc9MX0jKc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WN8sMJQO; 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="WN8sMJQO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2A408C4CED1; Tue, 11 Feb 2025 01:31:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739237462; bh=bjvXG49dTpKT0QJS7J3gn7tqEEJFTEJiy5VTXshl5+E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WN8sMJQOyxDhlmYeuoxjX1r0VyNrkXWyCAyxwz/i9DX3IcnY39TKKDSKvOEOikMe5 dY+58A6gDyTwtoPgA8w5gI8VpKmZJlaFDMp/J4xDIhI/lEdn6hNfjObAFqtnXu+M9s eMOu3RmQUruX9MMchqAiIhJZRTKP0wZpn2DOv0gvyrVHgY7t6n2+ARvs7zwceuIcbg cC0OA1hfYDEU5ikf7OagnGlelFEM0oJnx8BHOFF3tGmSh4gonP47pW33GoN/qO5Mwj Pox6VJCT1CLM4HtpOotgFin53A1IApsplVAenty7V7HZdelQtn+xp9jdOJO5r7dFy+ h/gUQoP2tFmWg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Kandybka , Rajneesh Bhardwaj , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Sasha Levin , david.e.box@intel.com, hdegoede@redhat.com, platform-driver-x86@vger.kernel.org Subject: [PATCH AUTOSEL 6.12 09/19] platform/x86/intel: pmc: fix ltr decode in pmc_core_ltr_show() Date: Mon, 10 Feb 2025 20:30:37 -0500 Message-Id: <20250211013047.4096767-9-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250211013047.4096767-1-sashal@kernel.org> References: <20250211013047.4096767-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.13 Content-Transfer-Encoding: 8bit From: Dmitry Kandybka [ Upstream commit 583ef25bb2a094813351a727ddec38b35a15b9f8 ] In pmc_core_ltr_show(), promote 'val' to 'u64' to avoid possible integer overflow. Values (10 bit) are multiplied by the scale, the result of expression is in a range from 1 to 34,326,183,936 which is bigger then UINT32_MAX. Compile tested only. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Dmitry Kandybka Reviewed-by: Rajneesh Bhardwaj Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20250123220739.68087-1-d.kandybka@gmail.com Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin --- drivers/platform/x86/intel/pmc/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c index 4e9c8c96c8cce..257c03c59fd95 100644 --- a/drivers/platform/x86/intel/pmc/core.c +++ b/drivers/platform/x86/intel/pmc/core.c @@ -625,8 +625,8 @@ static u32 convert_ltr_scale(u32 val) static int pmc_core_ltr_show(struct seq_file *s, void *unused) { struct pmc_dev *pmcdev = s->private; - u64 decoded_snoop_ltr, decoded_non_snoop_ltr; - u32 ltr_raw_data, scale, val; + u64 decoded_snoop_ltr, decoded_non_snoop_ltr, val; + u32 ltr_raw_data, scale; u16 snoop_ltr, nonsnoop_ltr; unsigned int i, index, ltr_index = 0; -- 2.39.5