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 39B794CA79E for ; Thu, 17 Sep 2026 21:10:16 +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=1789679419; cv=none; b=WRz1+IGoUk4vp3Rlvs5aA6yzsi0ttzpDCeS9XWJj8j46oY80tCSPEP8FpT5Z2gdIR6lX5yIbhugxOX0rsd1gvu/W8w9xkxUOAu/wcjPIoSiCsrxpSuhxTQdX35SqMdsZnU5E7yUX1D/v5hzTDFfO5FMd/3xiU2RjZEs2NBZhKVI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789679419; c=relaxed/simple; bh=1Vy8ytwzi07+6I3UMF3BvF8Cje2Ce5ettUXykRC5Tts=; h=Date:To:From:Subject:Message-Id; b=fwIzoYkXKiu/wtXRy0JiPs6zMLgKZ7MhxSBbfP2280plhQYcFKb/f4z45PIyOWCCuUJxQSzniiOm5SHMlrDWbvgeG/LR82A9Cja0McUqk704XqaCuCulsBKIy7kuoLMuqNNBh1hLxBVcUSF8cJwi0ZPKH+iB84X8QViTJPtPIRc= 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=0Jphr7um; 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="0Jphr7um" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7DC951F00893; Thu, 17 Sep 2026 21:10:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789679416; bh=QqWO6cxwMDsHPGMjS6lmT2L2GxbGtrnWxGwMq8Lt6yU=; h=Date:To:From:Subject; b=0Jphr7um/RQf1FN+6fxQ+hWg7gF//4MrTC7rp0t1Wo9PUgY3uVKqQcEX2s/Yh3m/C 7rE4LmDtrIU5taM6Svrga/s9owOvmB5hEpRxhfO9ypmknrHov2fIy69/7XNzNiCfNn d9jJBJpTk2oCfCUqNDQuun01WPaUtjgjJ6P69TU4= Date: Thu, 17 Sep 2026 14:10:16 -0700 To: mm-commits@vger.kernel.org,ljs@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] uprobes-remove-vm_io-set-vm_mixedmap-for-mapped-kernel-pages.patch removed from -mm tree Message-Id: <20260917211016.7DC951F00893@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: uprobes: remove VM_IO, set VM_MIXEDMAP for mapped kernel pages has been removed from the -mm tree. Its filename was uprobes-remove-vm_io-set-vm_mixedmap-for-mapped-kernel-pages.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: "Lorenzo Stoakes (ARM)" Subject: uprobes: remove VM_IO, set VM_MIXEDMAP for mapped kernel pages Date: Mon, 14 Sep 2026 15:57:42 +0100 These are not MMIO pages so VMA_IO_BIT is an inappropriate flag to set. Instead, set them VMA_MIXEDMAP_BIT as they are kernel mappings and this is the appropriate flag to set for those. This provides the semantics required - no VMA merging is permitted, but does not prevent GUP. However this has no meaningful impact as these are refcounted and thus can be GUPed. A previous commit already prevented __mm_populate() from being invoked on XOL areas, which VMA_IO_BIT was previously relied upon to do, so that is no longer required. Both VMAs set a VMA name, so always_dump_vma() returns true before vma_dump_size() reaches its VMA_IO_BIT check, and thus there is no change in core dump behaviour. Change this for both the core xol_add_vma() function and the x86-specific get_uprobe_trampoline() function. Link: https://lore.kernel.org/20260914-b4-mmap-prepare-vma-flag-sanify-v2-22-7d9781ed5361@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton --- arch/x86/kernel/uprobes.c | 2 +- kernel/events/uprobes.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) --- a/arch/x86/kernel/uprobes.c~uprobes-remove-vm_io-set-vm_mixedmap-for-mapped-kernel-pages +++ a/arch/x86/kernel/uprobes.c @@ -715,7 +715,7 @@ static struct vm_area_struct *get_uprobe *new_mapping = true; return _install_special_mapping(mm, vaddr, PAGE_SIZE, - VM_READ|VM_EXEC|VM_MAYEXEC|VM_MAYREAD|VM_IO, + VM_READ|VM_EXEC|VM_MAYEXEC|VM_MAYREAD|VM_MIXEDMAP, &tramp_mapping); } --- a/kernel/events/uprobes.c~uprobes-remove-vm_io-set-vm_mixedmap-for-mapped-kernel-pages +++ a/kernel/events/uprobes.c @@ -1726,8 +1726,8 @@ static int xol_add_vma(struct mm_struct } vma = _install_special_mapping(mm, area->vaddr, PAGE_SIZE, - VM_EXEC|VM_MAYEXEC|VM_DONTCOPY|VM_IO| - VM_SEALED_SYSMAP, + VM_EXEC|VM_MAYEXEC|VM_DONTCOPY| + VM_MIXEDMAP|VM_SEALED_SYSMAP, &xol_mapping); if (IS_ERR(vma)) { ret = PTR_ERR(vma); _ 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 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