From patchwork Mon Nov 23 20:14:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 11926663 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 0BEF0C2D0E4 for ; Mon, 23 Nov 2020 20:33:02 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 8BBC820715 for ; Mon, 23 Nov 2020 20:33:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="2u1NWgU3"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="ftOluYgs" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8BBC820715 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:To:From:Subject:References:Mime-Version:Message-Id: In-Reply-To:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=FAWtBIcZQe1EpqgVX0g0xfsA3Xas40URASIiaiJNWsQ=; b=2u1NWgU3bCR4c+qkZGrbo+PvZ tNBFFRx9AiXubzgZU7widaOxJuk8CFeOFTo3LITtMRLdyTjoKas3yID2Y5D9wgJnbqp9jo/IjfPOx ExU7W1fkef3nekdaCtg//pueZFrIa0XKptrezUWwM1ra5ZiPNzWIFEOx6GvRPI1cCsu57Rsy2nRxz LqKvTI4byVaDh/Y7e/DT8TTw9otGmqhHKtYevezzxdJc/8a2XLO5Ql/2KRK7H4gFDTSG/dzsZ4tWX tuFSQjTDz5qJodpQIbkDyJ7PvUxoV5td3FMSrdS/jkef+SpX4zCG/SJ+2sXwEu4WCNGdifQLC1mtL OBt9PLTNQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1khIVP-0001L0-3w; Mon, 23 Nov 2020 20:32:11 +0000 Received: from mail-qk1-x74a.google.com ([2607:f8b0:4864:20::74a]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1khIEz-0002B1-0Q for linux-arm-kernel@lists.infradead.org; Mon, 23 Nov 2020 20:15:17 +0000 Received: by mail-qk1-x74a.google.com with SMTP id v134so15527081qka.19 for ; Mon, 23 Nov 2020 12:15:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=01BW1GkidBPog12oysmILVzISd/+h9nT3tAZwCe3eCQ=; b=ftOluYgsoGAOE5Ye/to9lLng+2ouMijOYaYtwma2Ox9E53wFC3jC7Nqa0GnHSc266v 7venxL4adfRnnuzv07o06M9sPHJt+dDW40FZqv8UC20VDOUHQgD11io/dJVACWzd5Crp NyCk5K3h5KXsbQg+rRlQ0KFgtBFOS94A1KVMBNcjTIUeRCkb113dfiZjpB1xcq3rtsuB zkGdOifa55a0nfyRYqdixyGXB6OXKvBSZu5bw11Vg4HhJQoZ7veWEiiF3/bcJyIsl+06 NXpZUiOOOis3fhzxBKjaSCZNXCdhA3reqMwAszBN4vudp7UH4LMtCP4gOnylYl/ep3ys oIDg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=01BW1GkidBPog12oysmILVzISd/+h9nT3tAZwCe3eCQ=; b=r0tJN6Mqp+J75sO15KR1IpkYbotDnWQcYi1bHlarCoCl3hKPEzyhkx+eU41NhSgLZw JJQ9bFW4rHf7EmlnwdFXh9yzISeM2OweV06iBMKaA8aYFhQTG6yOImVmpnBkDmFD2mrX FeqrxCqrHQgChT08Gohvlav5BIPokgGTsX74ArEuGrk5YLGtdU/ccGIEACWNlA8LD9vf 5RFD638n511+32wLRwbt3YjrIGhLaIR2hU54QF3kSCrl1TMNkJNAKR3fEx+SvB6mTBoR UQLJRCj0Tkw3HlH92fLyfzwjcZZ/3+VOIQHGCQvHlOEVPCOn4h61qwfdUgevQLSJH8Zm 7L6A== X-Gm-Message-State: AOAM531iSXPGv8eRPO0U0FCOntXmqM9K7rjtKGoMq3rxwfYmuaULJwlL GZdtiIf/kD/G+SxgPoeUkmDq4uQASi5QCUiz X-Google-Smtp-Source: ABdhPJxJLu3lTiGvBa9uPDvK6XDnw+JLdTht9mXTq7OHyNsPd/2Yeymonl71MNmRULVBzyGWvGUs9Gqp+tGli6N/ X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:a0c:804a:: with SMTP id 68mr1169751qva.1.1606162505149; Mon, 23 Nov 2020 12:15:05 -0800 (PST) Date: Mon, 23 Nov 2020 21:14:35 +0100 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog Subject: [PATCH mm v4 05/19] kasan: allow VMAP_STACK for HW_TAGS mode From: Andrey Konovalov To: Andrew Morton X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201123_151513_792340_1C18DAA0 X-CRM114-Status: GOOD ( 12.88 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, Marco Elver , Catalin Marinas , Kevin Brodsky , Will Deacon , Branislav Rankov , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Alexander Potapenko , Evgenii Stepanov , Andrey Konovalov , Andrey Ryabinin , Vincenzo Frascino , Dmitry Vyukov Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Even though hardware tag-based mode currently doesn't support checking vmalloc allocations, it doesn't use shadow memory and works with VMAP_STACK as is. Change VMAP_STACK definition accordingly. Signed-off-by: Andrey Konovalov Reviewed-by: Marco Elver Acked-by: Catalin Marinas Reviewed-by: Dmitry Vyukov Link: https://linux-review.googlesource.com/id/I3552cbc12321dec82cd7372676e9372a2eb452ac --- arch/Kconfig | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/Kconfig b/arch/Kconfig index 762096e4ec16..6092102b29e9 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -955,16 +955,16 @@ config VMAP_STACK default y bool "Use a virtually-mapped stack" depends on HAVE_ARCH_VMAP_STACK - depends on !KASAN || KASAN_VMALLOC + depends on !KASAN || KASAN_HW_TAGS || KASAN_VMALLOC help Enable this if you want the use virtually-mapped kernel stacks with guard pages. This causes kernel stack overflows to be caught immediately rather than causing difficult-to-diagnose corruption. - To use this with KASAN, the architecture must support backing - virtual mappings with real shadow memory, and KASAN_VMALLOC must - be enabled. + To use this with software KASAN modes, the architecture must support + backing virtual mappings with real shadow memory, and KASAN_VMALLOC + must be enabled. config ARCH_OPTIONAL_KERNEL_RWX def_bool n