From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7C08D49EC6E for ; Thu, 17 Sep 2026 21:10:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789679417; cv=none; b=ZE9LL7XEQ40pZwbqqM7T8Kk1HlfZ9WLKgFFv227SPgLYX9LY3AWuPIBkmKz6ZrAGOvU8OyZUX+O8N5OSsUdUGXm2vECkUeo9jcnsEbS4qTdbBoH0VaNEsteEhZDP7/LobR0g8RbWBptIgqTGa9HuvM6U8nqYSz61GaPT4guYOIM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789679417; c=relaxed/simple; bh=CSSQFlhvvhj9X0tId2odBeJWVUtXuN7qBGdwrQtUqX4=; h=Date:To:From:Subject:Message-Id; b=ZAGuM3R/ajr1V64su+93SG6b1gDgZ1EL75VbBKZDTyg+FvLlarV4kP99Kbjq4h05FbshY7L7RN4qZ43kYPKHr1G52eWa3RXeWic/J8qH5pypUigcCZZQtFQAuOxm5OuJi1Exchd8hpnp1rWMWHhKo1/UzjJh0oanI9Dz4+/UncE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=0slX2hjj; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="0slX2hjj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 52F2C1F000FF; Thu, 17 Sep 2026 21:10:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789679415; bh=7F27JO7Hv5omhOqkUoda7wqFsi5ZFTQETlLMuyUYQBA=; h=Date:To:From:Subject; b=0slX2hjj/ykdBgaT2Si2VPFQrZgRh3hq84T5WfD2T0MJYQCSTMFeq4OHPx2g2zWzi mZkpg+JfKDpxY07Dra4Dm4qgVsp76cFCNEOWClcjb27LOIDVBFDFTCMX1CMlfT7zQP Pcvn/+ovoI3eV+vpJ2Samj0PVBWqjfzik+OzDDxg= Date: Thu, 17 Sep 2026 14:10:14 -0700 To: mm-commits@vger.kernel.org,ljs@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] mm-gup-error-out-early-on-vma_mayread_bit-vmas.patch removed from -mm tree Message-Id: <20260917211015.52F2C1F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/gup: error out early on !VMA_MAYREAD_BIT VMAs has been removed from the -mm tree. Its filename was mm-gup-error-out-early-on-vma_mayread_bit-vmas.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: "Lorenzo Stoakes (ARM)" Subject: mm/gup: error out early on !VMA_MAYREAD_BIT VMAs Date: Mon, 14 Sep 2026 15:57:41 +0100 When populating a VMA range via the aptly named populate_vma_page_range() an unreadable VMA will always eventually fail with -EFAULT. That a VMA is accessible is always checked, however VMA_MAYREAD_BIT is not. All user mappings always have VMA_MAYREAD_BIT set, so this check only impacts kernel mappings. It is implemented specifically to disallow population of uprobes XOL mappings which are exec-only. A nasty interaction with these mappings may occur if they are mlocked, so actively disallow this early. This allows a subsequent commit to remove the VM_IO check in __mm_populate() which otherwise requires non-MMIO mappings to be wrongly flagged simply as a workaround. Link: https://lore.kernel.org/20260914-b4-mmap-prepare-vma-flag-sanify-v2-21-7d9781ed5361@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton --- mm/gup.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/mm/gup.c~mm-gup-error-out-early-on-vma_mayread_bit-vmas +++ a/mm/gup.c @@ -1836,6 +1836,10 @@ long populate_vma_page_range(struct vm_a if (!vma_is_accessible(vma)) return -EFAULT; + /* Unreadable VMAs also cannot be faulted in. */ + if (!vma_test(vma, VMA_MAYREAD_BIT)) + return -EFAULT; + gup_flags = FOLL_TOUCH; /* * We want to touch writable mappings with a write fault in order _ Patches currently in -mm which might be from ljs@kernel.org are mm-vmpressure-remove-window-size-todo.patch tools-testing-selftests-mm-add-missing-gitignore-entries.patch mm-move-drivers-char-memc-to-mm-char-memc.patch mm-implement-file_is_dev_zero-to-uniquely-identify-dev-zero.patch mm-vma-only-permit-map_private-dev-zero-to-be-mapped-anonymous.patch mm-vma-make-map_private-mapped-dev-zero-mappings-truly-anonymous.patch tools-testing-vma-add-test-to-assert-map_private-dev-zero-is-anon.patch tools-testing-selftests-mm-add-map_private-dev-zero-merge-tests.patch mm-madvise-swap-in-cowd-map_private-file-mappings-on-madv_willneed.patch mm-huge_memory-zap-deposited-page-tables-after-an-rcu-grace-period.patch mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures.patch mm-enable-mmu_gather_rcu_table_free-for-mmu-riscv.patch mm-enable-mmu_gather_rcu_table_free-for-mmu-arm.patch mm-enable-mmu_gather_rcu_table_free-for-arc-microblaze-xtensa.patch mm-enable-mmu_gather_rcu_table_free-for-sparc64.patch mm-enable-mmu_gather_rcu_table_free-for-m68k-coldfire.patch mm-enable-mmu_gather_rcu_table_free-for-sh-x2.patch mm-enable-mmu_gather_rcu_table_free-for-m68k-motorola.patch mm-enable-mmu_gather_rcu_table_free-for-sparc32.patch mm-make-userland-page-table-freeing-rcu-safe.patch mm-change-the-contract-for-free_pgtables-update-docs.patch uprobes-remove-vm_io-set-vm_mixedmap-for-mapped-kernel-pages.patch mm-mlock-clear-vma_locked_mask-over-mmap-callback.patch mm-mlock-eliminate-weird-vma_io_bit-abuse-and-simplify.patch mm-vma-enforce-that-only-kernel-owned-mappings-may-set-vma_io_bit.patch mm-remove-vma_io_bit-check-in-vma_is_kernel_owned.patch mm-remove-hugetlb_inlineh.patch mm-rename-is_vm_hugetlb_page-to-vma_is_hugetlb.patch mm-drop-some-redundant-checks-around-hugetlb-vmas.patch mm-madvise-update-is_valid_guard_vma-to-use-vma_can_merge.patch mm-vma-introduce-vma_is_persistent.patch mm-uffd-use-predicates-for-userfaultfd-checks.patch mm-madvise-use-predicates-for-madvise-madv_dofork.patch mm-eliminate-vma_special_flags-usage-when-hugetlb-explicitly-tested.patch mm-eliminate-vma_special_flags-check-in-lru_gen_look_around.patch mm-avoid-use-of-vma_special_flags-in-migrate_vma_setup.patch mm-eliminate-vm_special-vma_special_flags.patch fuse-dax-do-not-set-vm_mixedmap.patch mm-huge_memory-remove-vma_is_special_huge.patch mm-vma-introduce-and-use-vma_can_gup.patch mm-vma-const-ify-vma_assert_stabilised-and-associated-functions.patch mm-implement-and-use-vma_has_anon_rmap-silence-kcsan.patch mm-update-comments-to-refer-to-anon-rmap-rather-than-anon_vma.patch