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bh=immTPDdSm8V7ezbOteojXYm/j7WkY1f3P9Y0YpK7onQ=; b=RnsU/ENJagNcPs2QU26d6s1fc8G3yNgTnuOT0JCULds11hh854ZbCwwhZq42dbXHvU jLZ2qkDvCJ76kK1sq2ONw+tYpLHr9ypgDbMMdudCL6XTSVKrXSHXKmuVDpgq5O5w0D10 2OxOuHVTlxsI9lUxieQypbGqAm9wTV7jWWXLWZKio6AGNn1fB/ND0IOa8+mFPCWD3mel iCY+SqvDL7L+WyyPMrvcjTqL7TDNLDOHhlla89ag3zkgnWqMJQZgenLavk+i5693qep3 +T139E4wO7yMgPr9ti9Wtu5owDyud/3j+gbdY6690xsh0B/5qvAOQuRQCDKrIsMjO8Xm t3Rg== X-Gm-Message-State: AOAM530oz8HdwkTLBjJz/bYtMNREpwvMnYNiR33zuO8PPeLvQM8A6kbY EkSlooNgbgFRM1VFvfL/JgsPHw== X-Google-Smtp-Source: ABdhPJzyDJpFjA/Q+sv1RhX5gsGPQpkP/4WlxxT8RLqjQWQaBWIid1inU3iHz1dJQWF+W7VpBZ1zIA== X-Received: by 2002:a1c:f311:: with SMTP id q17mr13703008wmq.168.1602230391713; Fri, 09 Oct 2020 00:59:51 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id u17sm11634118wri.45.2020.10.09.00.59.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Oct 2020 00:59:50 -0700 (PDT) From: Daniel Vetter To: DRI Development , LKML Subject: [PATCH v2 00/17] follow_pfn and other iomap races Date: Fri, 9 Oct 2020 09:59:17 +0200 Message-Id: <20201009075934.3509076-1-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201009_035953_136048_4C6692C9 X-CRM114-Status: GOOD ( 15.44 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:342 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 SPF_NONE SPF: sender does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 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-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 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Hi all, Round two 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/ And the discussion that sparked this journey: https://lore.kernel.org/dri-devel/20201007164426.1812530-1-daniel.vetter@ffwll.ch/ 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. The big thing I can't test are all the frame_vector changes in habanalbas, exynos and media. Gerald has given the s390 patch a spin already. Review, testing, feedback all very much welcome. Cheers, Daniel Daniel Vetter (17): 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 s390/pci: Remove races against pte updates 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 drm/i915: Properly request PCI BARs arch/s390/pci/pci_mmio.c | 98 +++++++++++-------- drivers/char/mem.c | 86 +--------------- drivers/gpu/drm/exynos/Kconfig | 1 - drivers/gpu/drm/exynos/exynos_drm_g2d.c | 48 ++++----- drivers/gpu/drm/i915/intel_uncore.c | 25 ++++- 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 | 3 +- 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/videobuf2-core.h | 42 ++++++++ kernel/resource.c | 95 +++++++++++++++++- mm/Kconfig | 3 - mm/Makefile | 1 - mm/memory.c | 76 +++++++++++++- mm/nommu.c | 17 ++++ security/Kconfig | 13 +++ 27 files changed, 412 insertions(+), 286 deletions(-) rename {mm => drivers/media/common/videobuf2}/frame_vector.c (85%)