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 03CC73CB57B; Wed, 30 Sep 2026 19:03:12 +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=1790794993; cv=none; b=oWlrgwlyW4igiT5ojXGVpwhvVs9WTTKJBgPSzhknOCmkiBBPMFepEhxb8jTJZkJvJY+2ct01ddrdNADGx4Nin4yBV5zMngB4bR+s4CiQi82aYaR+y0JhP+jYAYr6rinI+z3Cv+f+Q4S0xNbZb3o6Oe1oa55tIeEx+8TBPxGJGDM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790794993; c=relaxed/simple; bh=WsNtl/0ypgP2uTgJelGRlbcgc7IOYipU8M66BRNwJZs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Md/YbT6HuPMe0CWKcB7taaDVaC5scBp7MzBbht+PScKrNkP659d+/eskMZhptxdljdjpzJDcUL8iAzsyt3IOHiYH1R0tsGA99BCsX4PRIr4OOTRWcsfbDidqx/n3Ku0P7HhfWq9rTkDlIDrOIIGXehD76EEAMTxUPVaBj5oDdEc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=MpYxMkV/; 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="MpYxMkV/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FCEB1F000FF; Wed, 30 Sep 2026 19:03:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790794991; bh=9cgXRVhGd1LadSIGYo3Gv8Qye51dmTga2YbFTs82eMM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MpYxMkV/jrEnvE0jsmf3LCNu4FvDtlPLb1HnZyFd2wQs5ZQ7fZnh84QIv8+jzEz7S Bv3IcuaJFZze90anRpBtdAt2p35cPqqYaDpiXR6/swKrIElF7oNSz0A9T6bKtkbnwG BsphZrDwzxDHg+la0bXuf66aH3hYxB5sL6fexcFk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Colin Ian King , Viresh Kumar , Sasha Levin Subject: [PATCH 6.6 0404/1193] OPP: of: Fix potential multiplication overflow when calculating freq Date: Wed, 30 Sep 2026 17:18:08 +0200 Message-ID: <20260930152443.170224683@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152434.301151190@linuxfoundation.org> References: <20260930152434.301151190@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Colin Ian King [ Upstream commit e11811a552252740bd396ec38378e9570ee16578 ] The multiplication be32_to_cpup(val++) * 1000 is performed using 32 bit unsigned integers and hence uses a 32 bit multiplication; this will overflow if be32_to_cpup(val++) is greater than 4294967 (which is very unlikely at present). The result is assigned to an unsigned long (which is a 64 bit value on 64 bit systems), so fix this potential overflow by casting the first operand of the multiplication to an unsigned int. Fixes: b496dfbc94ab ("PM / OPP: Initialize OPP table from device tree") Signed-off-by: Colin Ian King Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin --- drivers/opp/of.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/opp/of.c b/drivers/opp/of.c index 782802806fc9b..56aa753f7b0d9 100644 --- a/drivers/opp/of.c +++ b/drivers/opp/of.c @@ -1080,7 +1080,7 @@ static int _of_add_opp_table_v1(struct device *dev, struct opp_table *opp_table) val = prop->value; while (nr) { - unsigned long freq = be32_to_cpup(val++) * 1000; + unsigned long freq = (unsigned long)be32_to_cpup(val++) * 1000; unsigned long volt = be32_to_cpup(val++); ret = _opp_add_v1(opp_table, dev, freq, volt, false); -- 2.53.0