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 8572C499F20 for ; Tue, 13 Oct 2026 18:32:43 +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=1791916365; cv=none; b=p6tcOjny4KLT+2J+iztepDbQ8v8phI3kFZJdmgv3a7XfU3RAEvCtkUNROWmo1LD27guuMmZv1PU/zDGQxX/9ZIHN0zmW/BHf9aAgQI5erDPZJJRF2TQOAOJPR9EBvq4wyo4bvxPPglqbYzuc+VP/IH9qjBqhL7v2tq4cVFYeAAE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791916365; c=relaxed/simple; bh=AeWQQeLRVjDPtBK0wOCUAIlPafxbGtYVp/mJ5CrgWBg=; h=Date:To:From:Subject:Message-Id; b=PmGvsCUGaiBFVxRSnkD5+ZO+kbu4/r8+M+XKX6KkfW+d8SLqzp2I7XB9SHpoS8HEe3OAFbrofNlK3PGArWr0KSDzHsk3WSwTkZJSvKLzj1eqSTpyLEcrJQ5wB8G86OEHVFGq0k9jX1MPbugG9RPYjzuFbVARcAdgwVGmkJT2lEI= 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=wAXjpXE7; 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="wAXjpXE7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF4D41F0089A; Tue, 13 Oct 2026 18:32:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791916363; bh=soMByakwgBz6dZuBWI/329u0SlmbG6yM5zYV6tB8q6I=; h=Date:To:From:Subject; b=wAXjpXE7Us82mlYKgqtuJx7wpyJ5wP2KNKp4CVoCoijgQAdMEKIQrE5FtwtOKw181 Xfcz7qr4BT4XB2xbqQGgO2suvUPIi8lU9FUnkvh+vwfHkzMc+t3tLyQEXVPBOacnjO /GdhHNlfRjZH8Mzp2tGw+Y/frPLoB8cIoEHihhDA= Date: Tue, 13 Oct 2026 11:32:42 -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: <20261013183242.DF4D41F0089A@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: Fri, 09 Oct 2026 19:04:15 +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/20261009-b4-mmap-prepare-vma-flag-sanify-v5-21-923b70125b1e@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton Reviewed-by: Suren Baghdasaryan Acked-by: David Hildenbrand (Arm) Cc: Liam R. Howlett Cc: Vlastimil Babka Cc: Jann Horn Cc: Pedro Falcato Cc: Mike Rapoport Cc: Michal Hocko Cc: Jonathan Corbet Cc: Greg Kroah-Hartman Cc: Dennis Dalessandro Cc: Jason Gunthorpe Cc: Leon Romanovsky Cc: Paul Moore Cc: Stephen Smalley Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Andrii Nakryiko Cc: Eduard Zingerman Cc: Kumar Kartikeya Dwivedi Cc: Zi Yan Cc: Baolin Wang Cc: Nico Pache Cc: Ryan Roberts Cc: Dev Jain Cc: Barry Song Cc: Lance Yang Cc: Usama Arif Cc: Kiryl Shutsemau Cc: Doug Gilbert Cc: James Bottomley Cc: Martin K. Petersen Cc: Simona Vetter Cc: Helge Deller Cc: Sebastian Reichel Cc: John Hubbard Cc: Peter Xu Cc: Masami Hiramatsu Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: Arnaldo Carvalho de Melo Cc: Namhyung Kim Cc: Mark Rutland Cc: Rik van Riel Cc: Harry Yoo Cc: Juri Lelli Cc: Vincent Guittot Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Will Deacon Cc: Aneesh Kumar K.V Cc: Nicholas Piggin Cc: Arnd Bergmann Cc: Muchun Song Cc: Oscar Salvador Cc: Matthew Wilcox (Oracle) Cc: Jan Kara Cc: Marc Zyngier Cc: Oliver Upton Cc: Catalin Marinas Cc: Madhavan Srinivasan Cc: Anup Patel Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Christian Borntraeger Cc: Janosch Frank Cc: Claudio Imbrenda Cc: Alexander Gordeev Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Vasily Gorbik Cc: David S. Miller Cc: Andreas Larsson Cc: Al Viro Cc: Christian Brauner Cc: Matthew Brost Cc: Joshua Hahn Cc: Rakie Kim Cc: Byungchul Park Cc: Gregory Price Cc: Ying Huang Cc: Alistair Popple Cc: Chris Li Cc: Kairui Song Cc: Kemeng Shi Cc: Nhat Pham Cc: Baoquan He Cc: Youngjun Park Cc: Johannes Weiner Cc: Qi Zheng Cc: Shakeel Butt Cc: Axel Rasmussen Cc: Yuanchu Xie Cc: Wei Xu Cc: Chengming Zhou Cc: Michal Hocko Cc: Miklos Szeredi Cc: Xu Xin Cc: Ihor Solodrai Cc: Bert Karwatzki --- 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-mlock-clear-vma_locked_mask-over-mmap-callback.patch mm-mlock-eliminate-weird-vma_io_bit-abuse-and-simplify.patch mm-vma-enforce-that-mm-managed-mappings-may-not-set-vma_io_bit.patch mm-remove-vma_io_bit-check-in-vma_is_mm_managed.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_mm_backed.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-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 mm-vma-dont-remove-vma-from-rmap-if-pgoff-unchanged.patch