From patchwork Mon Oct 26 10:58:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 11856491 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=-6.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 A91B4C56202 for ; Mon, 26 Oct 2020 10:58:30 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 CD64A22277 for ; Mon, 26 Oct 2020 10:58:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=ffwll.ch header.i=@ffwll.ch header.b="UWVGBGjy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CD64A22277 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ffwll.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 906FB89147; Mon, 26 Oct 2020 10:58:28 +0000 (UTC) Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) by gabe.freedesktop.org (Postfix) with ESMTPS id D3DFF89147 for ; Mon, 26 Oct 2020 10:58:26 +0000 (UTC) Received: by mail-wm1-x344.google.com with SMTP id c16so11967242wmd.2 for ; Mon, 26 Oct 2020 03:58:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=FLkPK/wakWgPcP2XtBGkyHk3/K5f5jOPCyDZpBtuyVA=; b=UWVGBGjyj6MIRYbUDiITJq5L6QqEg6/q2/NHckpyd8RPSBh26b0bPaluvTWItOuYKc uaoPMBpxALWoXXsF90NCYVWJoITCFikSp8O7FpqdOPDdJXFgIlHFG/TgfvpItfUwxafp 6wW5he4gsgXTW7dkqWJgYLc8PHDC8/A2/zOmc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=FLkPK/wakWgPcP2XtBGkyHk3/K5f5jOPCyDZpBtuyVA=; b=KRoJxdSE1rl1sxCsJYFDvwVXK3j8x5iO26CeOl4yRMt9lQQCddLqaqn+YKi62yAEKR TIjn91o9sWcHOkwUoKHtWfSxuMl8DE+6M8poQ8Y4RWvMUncY60vHlNtt5iuBu72kbOx5 ejNPZnKO2nrxE74KljeIanbPWmjvK5DrRDyQ9naZDMDVwLWLa4r2BjpoDW7Lwpyz5OMF UEDONbDw4aPTJLuSEzPtqjoiR3f20KlbEMJ5+RV2WbsgB6Fvj/5duIzPdtShaZ33THzV oaNPbl56WxD/AOI0RCzF3ynjdBU+IOP3cRFP4njR4fkcLUgG0NIlTB9WMGewDaQfjPZH 8zXQ== X-Gm-Message-State: AOAM533uVmbPp4qvnz8V3zMgY0QZfOPCAJ1qhGi0LMgqyM5vsPWlMdsS X8L7/Wb0dFw7bYJAuI4rf/TtpU2RiUopCo2v X-Google-Smtp-Source: ABdhPJxesVax0WQRMCyO4OuQvYno6G/x4zHb3UoXArN6uKT0KIo/6VWoGjLr6p0ejXLAy+E8fDIECg== X-Received: by 2002:a1c:3243:: with SMTP id y64mr15267147wmy.175.1603709905111; Mon, 26 Oct 2020 03:58:25 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id w83sm21165156wmg.48.2020.10.26.03.58.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Oct 2020 03:58:24 -0700 (PDT) From: Daniel Vetter To: DRI Development , LKML Subject: [PATCH v4 00/15] follow_pfn and other iomap races Date: Mon, 26 Oct 2020 11:58:03 +0100 Message-Id: <20201026105818.2585306-1-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, linux-samsung-soc@vger.kernel.org, kvm@vger.kernel.org, Daniel Vetter , linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi all Round 3 of my patch series to clamp down a bunch of races and gaps around follow_pfn and other access to iomem mmaps. Previous version: v1: https://lore.kernel.org/dri-devel/20201007164426.1812530-1-daniel.vetter@ffwll.ch/ v2: https://lore.kernel.org/dri-devel/20201009075934.3509076-1-daniel.vetter@ffwll.ch v3: https://lore.kernel.org/dri-devel/20201021085655.1192025-1-daniel.vetter@ffwll.ch/ And the discussion that sparked this journey: https://lore.kernel.org/dri-devel/20201007164426.1812530-1-daniel.vetter@ffwll.ch/ Changes in v4: - Drop the s390 patch, that was very stand-alone and now queued up to land through s390 trees. - Comment polish per Dan's review. Changes in v3: - Bunch of polish all over, no functional changes aside from one barrier in the resource code, for consistency. - A few more r-b tags. Changes in v2: - tons of small polish&fixes all over, thanks to all the reviewers who spotted issues - I managed to test at least the generic_access_phys and pci mmap revoke stuff with a few gdb sessions using our i915 debug tools (hence now also the drm/i915 patch to properly request all the pci bar regions) - reworked approach for the pci mmap revoke: Infrastructure moved into kernel/resource.c, address_space mapping is now set up at open time for everyone (which required some sysfs changes). Does indeed look a lot cleaner and a lot less invasive than I feared at first. I feel like this is ready for some wider soaking. Since the remaining bits are all kinda connnected probably simplest if it all goes through -mm. Cheers, Daniel Daniel Vetter (15): drm/exynos: Stop using frame_vector helpers drm/exynos: Use FOLL_LONGTERM for g2d cmdlists misc/habana: Stop using frame_vector helpers misc/habana: Use FOLL_LONGTERM for userptr mm/frame-vector: Use FOLL_LONGTERM media: videobuf2: Move frame_vector into media subsystem mm: Close race in generic_access_phys mm: Add unsafe_follow_pfn media/videbuf1|2: Mark follow_pfn usage as unsafe vfio/type1: Mark follow_pfn as unsafe PCI: Obey iomem restrictions for procfs mmap /dev/mem: Only set filp->f_mapping resource: Move devmem revoke code to resource framework sysfs: Support zapping of binary attr mmaps PCI: Revoke mappings like devmem drivers/char/mem.c | 86 +-------------- drivers/gpu/drm/exynos/Kconfig | 1 - drivers/gpu/drm/exynos/exynos_drm_g2d.c | 48 ++++----- drivers/media/common/videobuf2/Kconfig | 1 - drivers/media/common/videobuf2/Makefile | 1 + .../media/common/videobuf2}/frame_vector.c | 54 ++++------ drivers/media/platform/omap/Kconfig | 1 - drivers/media/v4l2-core/videobuf-dma-contig.c | 2 +- drivers/misc/habanalabs/Kconfig | 1 - drivers/misc/habanalabs/common/habanalabs.h | 6 +- drivers/misc/habanalabs/common/memory.c | 50 ++++----- drivers/pci/pci-sysfs.c | 4 + drivers/pci/proc.c | 6 ++ drivers/vfio/vfio_iommu_type1.c | 4 +- fs/sysfs/file.c | 11 ++ include/linux/ioport.h | 6 +- include/linux/mm.h | 47 +------- include/linux/sysfs.h | 2 + include/media/frame_vector.h | 47 ++++++++ include/media/videobuf2-core.h | 1 + kernel/resource.c | 101 +++++++++++++++++- mm/Kconfig | 3 - mm/Makefile | 1 - mm/memory.c | 78 +++++++++++++- mm/nommu.c | 17 +++ security/Kconfig | 13 +++ 26 files changed, 347 insertions(+), 245 deletions(-) rename {mm => drivers/media/common/videobuf2}/frame_vector.c (85%) create mode 100644 include/media/frame_vector.h