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 3E9AD2DB7B4 for ; Tue, 14 Jul 2026 02:26:29 +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=1783995991; cv=none; b=cctdy0bxY2YVhcgg3Z0+lnVzbHruUwhlg7dhqwHAObZWhclBtvHwljGSrslqpbOOucDFaxkZ/lsGW19r/EukSZH6xduop/hB6DtJEnLea5d9YP+kBq5vBzs7qy5nHqStljBQ/BHaQQMHIGbz6q+sTFgJ6VI3LSDJ1+2HMJzD7nI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783995991; c=relaxed/simple; bh=sxqZhFkBo8nljfZByWPdCRF52qPEP4cW8z4ijKi8eG8=; h=Date:To:From:Subject:Message-Id; b=PZRV5Luy2JEn3x3/8OgjsCiHM2bWwMBzaq2p5HXwtloIY/LGE53P9L3KJfHHZtQ9DzrVebAkvYC4JBa54TY1YW8xB84wE+mcDXPK2lsI7ZHzSXA8VDX6y137BCflzJW8cXqBDThZkVVDtKGP9QfnO4iCtm+C6j2UGsOp1bTxnt0= 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=rp+j6VRF; 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="rp+j6VRF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C7D951F000E9; Tue, 14 Jul 2026 02:26:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1783995989; bh=Hs2FlR9FegzmN5QB5WROgXXfCmFC6MFk9+/QEiSeD0I=; h=Date:To:From:Subject; b=rp+j6VRFRHjRwK94oOsqL9qwFpvGZEjHuWEjB6aUmZMxJyBBuNR4Hp3V9dCUYQQ/X XRfXWMr6be3uXMPjF+uapVv5/SXGm0rPNbSQSvPDiXhZTxBxN0QQ13zWhVWdo3MC1f 6Yg9gWkOO7jnvO9uD/1e7b/HkCLCS7Pw74ZNAD88= Date: Mon, 13 Jul 2026 19:26:29 -0700 To: mm-commits@vger.kernel.org,ljs@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-vma-update-create_init_stack_vma-to-use-vma_flags_t.patch added to mm-new branch Message-Id: <20260714022629.C7D951F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/vma: update create_init_stack_vma() to use vma_flags_t has been added to the -mm mm-new branch. Its filename is mm-vma-update-create_init_stack_vma-to-use-vma_flags_t.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vma-update-create_init_stack_vma-to-use-vma_flags_t.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Lorenzo Stoakes Subject: mm/vma: update create_init_stack_vma() to use vma_flags_t Date: Sat, 11 Jul 2026 19:45:06 +0100 Replace use of the legacy vm_flags_t flags with vma_flags_t values in create_init_stack_vma(). As part of this change we add VMA_STACK_EARLY and VMA_STACK_INCOMPLETE vma_flags_t defines, and slightly rework create_init_stack_vma() for clarity. No functional change intended. Link: https://lore.kernel.org/20260711-b4-vma-flags-mm-v2-9-0fa2357d5431@kernel.org Signed-off-by: Lorenzo Stoakes Reviewed-by: Zi Yan Reviewed-by: Lance Yang Cc: Baolin Wang Cc: Barry Song Cc: Christian Brauner Cc: Dave Airlie Cc: David Hildenbrand Cc: Dev Jain Cc: Jani Nikula Cc: Jan Kara Cc: Jann Horn Cc: Mike Rapoport Cc: Muchun Song Cc: Nico Pache Cc: Oscar Salvador Cc: Pedro Falcato Cc: Suren Baghdasaryan Cc: Thomas Zimmermann Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- include/linux/mm.h | 4 ++++ mm/vma_exec.c | 18 +++++++++++------- tools/testing/vma/include/dup.h | 4 ++++ 3 files changed, 19 insertions(+), 7 deletions(-) --- a/include/linux/mm.h~mm-vma-update-create_init_stack_vma-to-use-vma_flags_t +++ a/include/linux/mm.h @@ -442,8 +442,10 @@ enum { #define VM_STACK INIT_VM_FLAG(STACK) #ifdef CONFIG_STACK_GROWSUP #define VM_STACK_EARLY INIT_VM_FLAG(STACK_EARLY) +#define VMA_STACK_EARLY mk_vma_flags(VMA_STACK_EARLY_BIT) #else #define VM_STACK_EARLY VM_NONE +#define VMA_STACK_EARLY EMPTY_VMA_FLAGS #endif #ifdef CONFIG_ARCH_HAS_PKEYS #define VM_PKEY_SHIFT ((__force int)VMA_HIGH_ARCH_0_BIT) @@ -544,6 +546,8 @@ enum { /* Bits set in the VMA until the stack is in its final location */ #define VM_STACK_INCOMPLETE_SETUP (VM_RAND_READ | VM_SEQ_READ | VM_STACK_EARLY) +#define VMA_STACK_INCOMPLETE_SETUP append_vma_flags( \ + VMA_STACK_EARLY, VMA_RAND_READ_BIT, VMA_SEQ_READ_BIT) #define TASK_EXEC_BIT ((current->personality & READ_IMPLIES_EXEC) ? \ VMA_EXEC_BIT : VMA_READ_BIT) --- a/mm/vma_exec.c~mm-vma-update-create_init_stack_vma-to-use-vma_flags_t +++ a/mm/vma_exec.c @@ -112,15 +112,17 @@ int relocate_vma_down(struct vm_area_str int create_init_stack_vma(struct mm_struct *mm, struct vm_area_struct **vmap, unsigned long *top_mem_p) { - unsigned long flags = VM_STACK_FLAGS | VM_STACK_INCOMPLETE_SETUP; + vma_flags_t flags = VMA_STACK_INCOMPLETE_SETUP; + struct vm_area_struct *vma; int err; - struct vm_area_struct *vma = vm_area_alloc(mm); + /* VMA_STACK_FLAGS and VMA_STACK_INCOMPLETE_SETUP must not overlap. */ + VM_WARN_ON_ONCE(vma_flags_test_any_mask(&flags, VMA_STACK_FLAGS)); + + vma = vm_area_alloc(mm); if (!vma) return -ENOMEM; - vma_set_anonymous(vma); - if (mmap_write_lock_killable(mm)) { err = -EINTR; goto err_free; @@ -134,18 +136,20 @@ int create_init_stack_vma(struct mm_stru if (err) goto err_ksm; + vma_flags_set_mask(&flags, VMA_STACK_FLAGS); + vma_set_anonymous(vma); + /* * Place the stack at the largest stack address the architecture * supports. Later, we'll move this to an appropriate place. We don't * use STACK_TOP because that can depend on attributes which aren't * configured yet. */ - VM_WARN_ON_ONCE(VM_STACK_FLAGS & VM_STACK_INCOMPLETE_SETUP); vma->vm_end = STACK_TOP_MAX; vma->vm_start = vma->vm_end - PAGE_SIZE; if (pgtable_supports_soft_dirty()) - flags |= VM_SOFTDIRTY; - vm_flags_init(vma, flags); + vma_flags_set(&flags, VMA_SOFTDIRTY_BIT); + vma->flags = flags; vma->vm_page_prot = vma_get_page_prot(vma); err = insert_vm_struct(mm, vma); --- a/tools/testing/vma/include/dup.h~mm-vma-update-create_init_stack_vma-to-use-vma_flags_t +++ a/tools/testing/vma/include/dup.h @@ -245,8 +245,10 @@ enum { #define VM_STACK INIT_VM_FLAG(STACK) #ifdef CONFIG_STACK_GROWSUP #define VM_STACK_EARLY INIT_VM_FLAG(STACK_EARLY) +#define VMA_STACK_EARLY mk_vma_flags(VMA_STACK_EARLY_BIT) #else #define VM_STACK_EARLY VM_NONE +#define VMA_STACK_EARLY EMPTY_VMA_FLAGS #endif #ifdef CONFIG_ARCH_HAS_PKEYS #define VM_PKEY_SHIFT ((__force int)VMA_HIGH_ARCH_0_BIT) @@ -315,6 +317,8 @@ enum { /* Bits set in the VMA until the stack is in its final location */ #define VM_STACK_INCOMPLETE_SETUP (VM_RAND_READ | VM_SEQ_READ | VM_STACK_EARLY) +#define VMA_STACK_INCOMPLETE_SETUP append_vma_flags( \ + VMA_STACK_EARLY, VMA_RAND_READ_BIT, VMA_SEQ_READ_BIT) #define TASK_EXEC_BIT ((current->personality & READ_IMPLIES_EXEC) ? \ VM_EXEC_BIT : VM_READ_BIT) _ Patches currently in -mm which might be from ljs@kernel.org are mm-vmalloc-acquire-init_mm-lock-on-huge-vmap-to-avoid-ptdump-uaf.patch x86-mm-pat-acquire-mmap-lock-on-page-table-free-to-avoid-ptdump-uaf.patch mm-ptdump-always-stabilise-against-page-table-freeing-using-init_mm.patch arm64-remove-redundant-concurrent-ptdump-uaf-mitigation.patch mm-move-alloc-tag-to-mm.patch mm-move-vma_start_pgoff-into-mmh-and-clean-up.patch mm-add-kdoc-comments-for-vma_start-last_pgoff.patch tools-testing-vma-use-vma_start_pgoff-in-merge-tests.patch mm-introduce-and-use-vma_end_pgoff.patch mm-rmap-update-mm-interval_treec-comments.patch mm-rmap-parameterise-vma_interval_tree_-by-address_space.patch mm-rmap-elide-unnecessary-static-inlines-in-interval_treec.patch mm-rmap-rename-vma_interval_tree_-to-mapping_rmap_tree_.patch mm-rmap-parameterise-anon_vma_interval_tree_-by-anon_vma.patch mm-rmap-rename-anon_vma_interval_tree_-params-and-use-pgoff_t.patch mm-rmap-rename-anon_vma_interval_tree_-to-anon_rmap_tree_.patch maintainers-move-mm-interval_treec-to-rmap-section.patch mm-vma-introduce-and-use-vmg_pages-vmg__pgoff.patch mm-vma-clean-up-anon_vma_compatible.patch mm-vma-refactor-vmg_adjust_set_range-for-clarity.patch mm-vma-minor-cleanup-of-expand_.patch mm-introduce-and-use-linear_page_delta.patch mm-vma-use-vma_start_pgoff-linear_page_index-in-mm-code.patch mm-prefer-vma__pgoff-to-vma-vm_pgoff-in-kernel.patch mm-vma-remove-duplicative-vma_pgoff_offset-helper.patch mm-use-linear_page_-consistently.patch mm-vma-introduce-vma_assert_can_modify.patch mm-vma-add-and-use-vma__pgoff.patch mm-vma-move-__install_special_mapping-to-vmac.patch mm-vma-make-vma_set_range-static-drop-insert_vm_struct-decl.patch mm-vma-update-vma_shrink-to-not-pass-start-pgoff-parameters.patch mm-vma-update-vmg_adjust_set_range-to-offset-pgoff-instead.patch mm-vma-slightly-rework-the-anonymous-check-in-__mmap_new_vma.patch mm-vma-introduce-and-use-vma_set_pgoff.patch mm-vma-correct-incorrect-vmah-inclusion.patch mm-vma-use-guard-clauses-in-can_vma_merge_.patch tools-testing-vma-default-vma-mm-flag-bits-to-64-bit.patch tools-testing-vma-output-compared-expression-on-assert_.patch mm-introduce-vma_flags_can_grow-and-vma_can_grow.patch mm-vma-update-do_mmap-to-use-vma_flags_t.patch mm-convert-__get_unmapped_area-to-use-vma_flags_t.patch mm-update-generic_get_unmapped_area-to-use-vma_flags_t.patch mm-prefer-mm-def_vma_flags-in-mm-logic.patch mm-vma-convert-vm_pgprot_modify-to-use-vma_flags_t-and-rename.patch mm-vma-rename-vma_get_page_prot-to-vma_flags_to_page_prot.patch mm-introduce-vma_get_page_prot-and-use-it.patch mm-vma-update-create_init_stack_vma-to-use-vma_flags_t.patch mm-vma-convert-miscellaneous-uses-of-vma-flags-in-core-mm.patch mm-mlock-convert-mlock-code-to-use-vma_flags_t.patch mm-mprotect-convert-mprotect-code-to-use-vma_flags_t.patch mm-mremap-convert-mremap-code-to-use-vma_flags_t.patch