From patchwork Wed Dec 11 16:56:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 11285745 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 834C218B6 for ; Wed, 11 Dec 2019 16:57:12 +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 5EA3B214AF for ; Wed, 11 Dec 2019 16:57:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="gpjlpJOo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5EA3B214AF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.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=n07Bse3YmJd+qcs/EYeCrXE87ONUltaLnasSJBKQy+g=; b=gpjlpJOoDHAG0H ssEmsIDy1WEoP0a2OFNbUXtWjjZp1vB9tOwVhK9o0BRd5WSHOtAyGDrrsysEgTcmoUTJjfGsopjyk ySyh1uqAUM2SNCMmtT/juUNpEOG7ZshYTrBKLml0bq93kC1wlhGwaP/bYy1RoJIvGWke6Ak7o5CJt 4tp9fO/XGwS0MPLl05ibr0qGxJKeVFMZN9sMP+yteNoQ9Kqcx5uVVw1Xn+6awDJJ7ochKXQW+3JUf W8gU+Pr1cLiqD9fJbkEc7n8VFgwKIPxnWm/M6gDspoprlPcD7OmPYKDYM5JkTjUDbhDaeXvQGYnZ0 385MgdnWDy3twktrHxkQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1if5IU-0003f3-SD; Wed, 11 Dec 2019 16:57:10 +0000 Received: from inca-roads.misterjones.org ([213.251.177.50]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1if5IS-0003dj-8S for linux-arm-kernel@lists.infradead.org; Wed, 11 Dec 2019 16:57:09 +0000 Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by cheepnis.misterjones.org with esmtpsa (TLSv1.2:DHE-RSA-AES128-GCM-SHA256:128) (Exim 4.80) (envelope-from ) id 1if5IN-00076q-Pr; Wed, 11 Dec 2019 17:57:04 +0100 From: Marc Zyngier To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Subject: [PATCH 0/3] KVM: arm/arm64: user_mem_abort() assorted fixes Date: Wed, 11 Dec 2019 16:56:47 +0000 Message-Id: <20191211165651.7889-1-maz@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, Christoffer.Dall@arm.com, alexandru.elisei@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on cheepnis.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191211_085708_445120_A850C818 X-CRM114-Status: UNSURE ( 7.85 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 1.0 (+) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (1.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 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: Alexandru Elisei , James Morse , Christoffer Dall , Julien Thierry , Suzuki K Poulose Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Alexandru recently reported an interesting issue with our handling of device mapping in user_mem_abort(), which is sligtly less than correct. The first patch of the series address this issue, and is a stable candidate. While I was looking at this code, I spotted what I think is a potential issue when handling a poisoned page, where we can race with a VMA being removed. This second patch is mostly a RFC, as this is not my area of expertise. Finally, the last patch is a cleanup removing an unnecessary console output. Marc Zyngier (3): KVM: arm/arm64: Properly handle faulting of device mappings KVM: arm/arm64: Re-check VMA on detecting a poisoned page KVM: arm/arm64: Drop spurious message when faulting on a non-existent mapping virt/kvm/arm/mmu.c | 47 +++++++++++++++++++++++++++++++++++++++------- 1 file changed, 40 insertions(+), 7 deletions(-)