From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D37F6C43387 for ; Mon, 7 Jan 2019 11:21:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9AC452087F for ; Mon, 7 Jan 2019 11:21:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="WWPHhQXv" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9AC452087F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=Jw2638x9I9nFhh8bJ6jWbIWHJRNP1aFaKLn5k417Ips=; b=WWPHhQXvEAQcBw Q8V+U+3ygeAU4bR6Uc35QlblSU6q080GkBUq/z1gQ26uPU1MwSr7zIGY1weZ4WaEgiWSiSl0pFQF5 66uHAomYwacVFOBTFoQk1Nztdn6i8knb6CJRWEUC3+I/3q1l//XECqMhOFyPdXQnhYoWHHUQmXl/o CsF0Ghd3BK+5smlbp5yR5AJ2seESTVsN3OJ2rZvA41K8NBspO3LzpF+KU7Z8UQbBLjJ3h7EoAQxqn x9Qrp3YS3I4uTs7weRzS68Kq0Wn+G2438ayfbTxx2QHpZfYrUkNtzIwzzntCcvyRfJuJZb4VqTDLk MO32zIjcRJXnTCIZsc8A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1ggSyU-0000zY-Va; Mon, 07 Jan 2019 11:21:42 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1ggSyQ-0000yp-Sf; Mon, 07 Jan 2019 11:21:40 +0000 X-UUID: aaff68078e72464e99ab946cf71b1e84-20190107 X-UUID: aaff68078e72464e99ab946cf71b1e84-20190107 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 808047882; Mon, 07 Jan 2019 03:21:25 -0800 Received: from mtkmbs08n2.mediatek.inc (172.21.101.56) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 7 Jan 2019 03:21:24 -0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 7 Jan 2019 19:21:21 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 7 Jan 2019 19:21:22 +0800 From: Miles Chen To: Catalin Marinas , Will Deacon Subject: [PATCH] arm64: trap illegal translations in __virt_to_phys() Date: Mon, 7 Jan 2019 19:21:20 +0800 Message-ID: <1546860080-13027-1-git-send-email-miles.chen@mediatek.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 X-TM-SNTS-SMTP: 234332DA94720DE407A4821BBD08A888B8AD06626A5B9BD0790A841A1B7E05452000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190107_032138_932719_698D9D3A X-CRM114-Status: UNSURE ( 8.20 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Miles Chen , linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, wsd_upstream@mediatek.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Current __virt_to_phys() only print warning messages for non-linear addresses. It's hard to catch all warnings by those messages. So add a VIRTUAL_BUG_ON() to trap all non-linear and non-symbol addresses (e.g., stack addresses) Tested by pass stack addresses and symbol addresses to __pa(). Result: stack addresses: kernel BUG() symbol addresses: kernel warning message Maybe we should trap all non-linear address translations in the future. Signed-off-by: Miles Chen --- arch/arm64/mm/physaddr.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/mm/physaddr.c b/arch/arm64/mm/physaddr.c index 67a9ba9eaa96..f6b935dad19c 100644 --- a/arch/arm64/mm/physaddr.c +++ b/arch/arm64/mm/physaddr.c @@ -14,6 +14,11 @@ phys_addr_t __virt_to_phys(unsigned long x) (void *)x, (void *)x); + /* trap all non-linear and non-symbol addresses */ + VIRTUAL_BUG_ON(!__is_lm_address(x) && + (x < (unsigned long)KERNEL_START || + x > (unsigned long)KERNEL_END)); + return __virt_to_phys_nodebug(x); } EXPORT_SYMBOL(__virt_to_phys); -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel