In order to be able to do this, we need to change VM_DATA_DEFAULT_FLAGS and friends and update the architecture-specific definitions also.
We then have to update some KSM logic to handle VMA flags, and introduce VMA_STACK_FLAGS to define the vma_flags_t equivalent of VM_STACK_FLAGS. We also introduce two helper functions for use during the time we are converting legacy flags to vma_flags_t values - vma_flags_to_legacy() and legacy_to_vma_flags(). This enables us to iteratively make changes to break these changes up into separate parts. We use these explicitly here to keep VM_STACK_FLAGS around for certain users which need to maintain the legacy vm_flags_t values for the time being. We are no longer able to rely on the simple VM_xxx being set to zero if the feature is not enabled, so in the case of VM_DROPPABLE we introduce VMA_DROPPABLE as the vma_flags_t equivalent, which is set to EMPTY_VMA_FLAGS if the droppable flag is not available. While we're here, we make the description of do_brk_flags() into a kdoc comment, as it almost was already. We use vma_flags_to_legacy() to not need to update the vm_get_page_prot() logic as this time. Note that in create_init_stack_vma() we have to replace the BUILD_BUG_ON() with a VM_WARN_ON_ONCE() as the tested values are no longer build time available. We also update mprotect_fixup() to use VMA flags where possible, though we have to live with a little duplication between vm_flags_t and vma_flags_t values for the time being until further conversions are made. Finally, we update the VMA tests to reflect these changes. Signed-off-by: Lorenzo Stoakes (Oracle) <[email protected]> --- arch/arc/include/asm/page.h | 2 +- arch/arm/include/asm/page.h | 2 +- arch/arm64/include/asm/page.h | 3 +- arch/hexagon/include/asm/page.h | 2 +- arch/loongarch/include/asm/page.h | 2 +- arch/mips/include/asm/page.h | 2 +- arch/nios2/include/asm/page.h | 2 +- arch/powerpc/include/asm/page.h | 4 +-- arch/powerpc/include/asm/page_32.h | 2 +- arch/powerpc/include/asm/page_64.h | 12 ++++---- arch/riscv/include/asm/page.h | 2 +- arch/s390/include/asm/page.h | 2 +- arch/x86/include/asm/page_types.h | 2 +- arch/x86/um/asm/vm-flags.h | 4 +-- include/linux/ksm.h | 10 +++---- include/linux/mm.h | 47 ++++++++++++++++++------------ mm/internal.h | 3 ++ mm/ksm.c | 43 ++++++++++++++------------- mm/mmap.c | 13 +++++---- mm/mprotect.c | 46 +++++++++++++++++------------ mm/mremap.c | 6 ++-- mm/vma.c | 34 +++++++++++---------- mm/vma.h | 14 +++++++-- mm/vma_exec.c | 5 ++-- security/selinux/hooks.c | 4 ++- tools/testing/vma/include/custom.h | 2 -- tools/testing/vma/include/dup.h | 42 ++++++++++++++------------ tools/testing/vma/include/stubs.h | 9 +++--- tools/testing/vma/tests/merge.c | 3 +- 29 files changed, 186 insertions(+), 138 deletions(-) diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h index 38214e126c6d..facc7a03b250 100644 --- a/arch/arc/include/asm/page.h +++ b/arch/arc/include/asm/page.h @@ -131,7 +131,7 @@ static inline unsigned long virt_to_pfn(const void *kaddr) #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) /* Default Permissions for stack/heaps pages (Non Executable) */ -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_NON_EXEC #define WANT_PAGE_VIRTUAL 1 diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h index ef11b721230e..fa4c1225dde5 100644 --- a/arch/arm/include/asm/page.h +++ b/arch/arm/include/asm/page.h @@ -184,7 +184,7 @@ extern int pfn_valid(unsigned long); #include <asm/memory.h> -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_TSK_EXEC #include <asm-generic/getorder.h> #include <asm-generic/memory_model.h> diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h index b39cc1127e1f..b98ac659e16f 100644 --- a/arch/arm64/include/asm/page.h +++ b/arch/arm64/include/asm/page.h @@ -46,7 +46,8 @@ int pfn_is_map_memory(unsigned long pfn); #endif /* !__ASSEMBLER__ */ -#define VM_DATA_DEFAULT_FLAGS (VM_DATA_FLAGS_TSK_EXEC | VM_MTE_ALLOWED) +#define VMA_DATA_DEFAULT_FLAGS append_vma_flags(VMA_DATA_FLAGS_TSK_EXEC, \ + VMA_MTE_ALLOWED_BIT) #include <asm-generic/getorder.h> diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/page.h index f0aed3ed812b..6d82572a7f21 100644 --- a/arch/hexagon/include/asm/page.h +++ b/arch/hexagon/include/asm/page.h @@ -90,7 +90,7 @@ struct page; #define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(__pa(kaddr))) /* Default vm area behavior is non-executable. */ -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_NON_EXEC #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) diff --git a/arch/loongarch/include/asm/page.h b/arch/loongarch/include/asm/page.h index 327bf0bc92bf..79235f4fc399 100644 --- a/arch/loongarch/include/asm/page.h +++ b/arch/loongarch/include/asm/page.h @@ -104,7 +104,7 @@ struct page *tlb_virt_to_page(unsigned long kaddr); extern int __virt_addr_valid(volatile void *kaddr); #define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr)) -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_TSK_EXEC #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h index 5ec428fcc887..50a382a0d8f6 100644 --- a/arch/mips/include/asm/page.h +++ b/arch/mips/include/asm/page.h @@ -213,7 +213,7 @@ extern bool __virt_addr_valid(const volatile void *kaddr); #define virt_addr_valid(kaddr) \ __virt_addr_valid((const volatile void *) (kaddr)) -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_TSK_EXEC extern unsigned long __kaslr_offset; static inline unsigned long kaslr_offset(void) diff --git a/arch/nios2/include/asm/page.h b/arch/nios2/include/asm/page.h index 722956ac0bf8..71eb7c1b67d4 100644 --- a/arch/nios2/include/asm/page.h +++ b/arch/nios2/include/asm/page.h @@ -85,7 +85,7 @@ extern struct page *mem_map; # define virt_to_page(vaddr) pfn_to_page(PFN_DOWN(virt_to_phys(vaddr))) # define virt_addr_valid(vaddr) pfn_valid(PFN_DOWN(virt_to_phys(vaddr))) -# define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC +# define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_NON_EXEC #include <asm-generic/memory_model.h> diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h index f2bb1f98eebe..281f25e071a3 100644 --- a/arch/powerpc/include/asm/page.h +++ b/arch/powerpc/include/asm/page.h @@ -240,8 +240,8 @@ static inline const void *pfn_to_kaddr(unsigned long pfn) * and needs to be executable. This means the whole heap ends * up being executable. */ -#define VM_DATA_DEFAULT_FLAGS32 VM_DATA_FLAGS_TSK_EXEC -#define VM_DATA_DEFAULT_FLAGS64 VM_DATA_FLAGS_NON_EXEC +#define VMA_DATA_DEFAULT_FLAGS32 VMA_DATA_FLAGS_TSK_EXEC +#define VMA_DATA_DEFAULT_FLAGS64 VMA_DATA_FLAGS_NON_EXEC #ifdef __powerpc64__ #include <asm/page_64.h> diff --git a/arch/powerpc/include/asm/page_32.h b/arch/powerpc/include/asm/page_32.h index 25482405a811..1fd8c21f0a42 100644 --- a/arch/powerpc/include/asm/page_32.h +++ b/arch/powerpc/include/asm/page_32.h @@ -10,7 +10,7 @@ #endif #endif -#define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32 +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_DEFAULT_FLAGS32 #if defined(CONFIG_PPC_256K_PAGES) || \ (defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES)) diff --git a/arch/powerpc/include/asm/page_64.h b/arch/powerpc/include/asm/page_64.h index 0f564a06bf68..d96c984d023b 100644 --- a/arch/powerpc/include/asm/page_64.h +++ b/arch/powerpc/include/asm/page_64.h @@ -84,9 +84,9 @@ extern u64 ppc64_pft_size; #endif /* __ASSEMBLER__ */ -#define VM_DATA_DEFAULT_FLAGS \ +#define VMA_DATA_DEFAULT_FLAGS \ (is_32bit_task() ? \ - VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64) + VMA_DATA_DEFAULT_FLAGS32 : VMA_DATA_DEFAULT_FLAGS64) /* * This is the default if a program doesn't have a PT_GNU_STACK @@ -94,12 +94,12 @@ extern u64 ppc64_pft_size; * stack by default, so in the absence of a PT_GNU_STACK program header * we turn execute permission off. */ -#define VM_STACK_DEFAULT_FLAGS32 VM_DATA_FLAGS_EXEC -#define VM_STACK_DEFAULT_FLAGS64 VM_DATA_FLAGS_NON_EXEC +#define VMA_STACK_DEFAULT_FLAGS32 VMA_DATA_FLAGS_EXEC +#define VMA_STACK_DEFAULT_FLAGS64 VMA_DATA_FLAGS_NON_EXEC -#define VM_STACK_DEFAULT_FLAGS \ +#define VMA_STACK_DEFAULT_FLAGS \ (is_32bit_task() ? \ - VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64) + VMA_STACK_DEFAULT_FLAGS32 : VMA_STACK_DEFAULT_FLAGS64) #include <asm-generic/getorder.h> diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index 187aad0a7b03..c78017061b17 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -204,7 +204,7 @@ static __always_inline void *pfn_to_kaddr(unsigned long pfn) (unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \ }) -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_NON_EXEC #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index f339258135f7..56da819a79e6 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -277,7 +277,7 @@ static inline unsigned long virt_to_pfn(const void *kaddr) #define virt_addr_valid(kaddr) pfn_valid(phys_to_pfn(__pa_nodebug((unsigned long)(kaddr)))) -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_NON_EXEC #endif /* !__ASSEMBLER__ */ diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h index 018a8d906ca3..3e0801a0f782 100644 --- a/arch/x86/include/asm/page_types.h +++ b/arch/x86/include/asm/page_types.h @@ -26,7 +26,7 @@ #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_TSK_EXEC /* Physical address where kernel should be loaded. */ #define LOAD_PHYSICAL_ADDR __ALIGN_KERNEL_MASK(CONFIG_PHYSICAL_START, CONFIG_PHYSICAL_ALIGN - 1) diff --git a/arch/x86/um/asm/vm-flags.h b/arch/x86/um/asm/vm-flags.h index df7a3896f5dd..622d36d6ddff 100644 --- a/arch/x86/um/asm/vm-flags.h +++ b/arch/x86/um/asm/vm-flags.h @@ -9,11 +9,11 @@ #ifdef CONFIG_X86_32 -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_TSK_EXEC #else -#define VM_STACK_DEFAULT_FLAGS (VM_GROWSDOWN | VM_DATA_FLAGS_EXEC) +#define VMA_STACK_DEFAULT_FLAGS append_vma_flags(VMA_DATA_FLAGS_EXEC, VMA_GROWSDOWN_BIT) #endif #endif diff --git a/include/linux/ksm.h b/include/linux/ksm.h index c982694c987b..d39d0d5483a2 100644 --- a/include/linux/ksm.h +++ b/include/linux/ksm.h @@ -17,8 +17,8 @@ #ifdef CONFIG_KSM int ksm_madvise(struct vm_area_struct *vma, unsigned long start, unsigned long end, int advice, vm_flags_t *vm_flags); -vm_flags_t ksm_vma_flags(struct mm_struct *mm, const struct file *file, - vm_flags_t vm_flags); +vma_flags_t ksm_vma_flags(struct mm_struct *mm, const struct file *file, + vma_flags_t vma_flags); int ksm_enable_merge_any(struct mm_struct *mm); int ksm_disable_merge_any(struct mm_struct *mm); int ksm_disable(struct mm_struct *mm); @@ -103,10 +103,10 @@ bool ksm_process_mergeable(struct mm_struct *mm); #else /* !CONFIG_KSM */ -static inline vm_flags_t ksm_vma_flags(struct mm_struct *mm, - const struct file *file, vm_flags_t vm_flags) +static inline vma_flags_t ksm_vma_flags(struct mm_struct *mm, + const struct file *file, vma_flags_t vma_flags) { - return vm_flags; + return vma_flags; } static inline int ksm_disable(struct mm_struct *mm) diff --git a/include/linux/mm.h b/include/linux/mm.h index 33d0c2af2c75..84c7f6ac5790 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -348,9 +348,9 @@ enum { * if KVM does not lock down the memory type. */ DECLARE_VMA_BIT(ALLOW_ANY_UNCACHED, 39), -#ifdef CONFIG_PPC32 +#if defined(CONFIG_PPC32) DECLARE_VMA_BIT_ALIAS(DROPPABLE, ARCH_1), -#else +#elif defined(CONFIG_64BIT) DECLARE_VMA_BIT(DROPPABLE, 40), #endif DECLARE_VMA_BIT(UFFD_MINOR, 41), @@ -505,31 +505,42 @@ enum { #endif #if defined(CONFIG_64BIT) || defined(CONFIG_PPC32) #define VM_DROPPABLE INIT_VM_FLAG(DROPPABLE) +#define VMA_DROPPABLE mk_vma_flags(VMA_DROPPABLE_BIT) #else #define VM_DROPPABLE VM_NONE +#define VMA_DROPPABLE EMPTY_VMA_FLAGS #endif /* 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 TASK_EXEC ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) +#define TASK_EXEC_BIT ((current->personality & READ_IMPLIES_EXEC) ? \ + VMA_EXEC_BIT : VMA_READ_BIT) /* Common data flag combinations */ -#define VM_DATA_FLAGS_TSK_EXEC (VM_READ | VM_WRITE | TASK_EXEC | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) -#define VM_DATA_FLAGS_NON_EXEC (VM_READ | VM_WRITE | VM_MAYREAD | \ - VM_MAYWRITE | VM_MAYEXEC) -#define VM_DATA_FLAGS_EXEC (VM_READ | VM_WRITE | VM_EXEC | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) - -#ifndef VM_DATA_DEFAULT_FLAGS /* arch can override this */ -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_EXEC +#define VMA_DATA_FLAGS_TSK_EXEC mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, \ + TASK_EXEC_BIT, VMA_MAYREAD_BIT, VMA_MAYWRITE_BIT, \ + VMA_MAYEXEC_BIT) +#define VMA_DATA_FLAGS_NON_EXEC mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, \ + VMA_MAYREAD_BIT, VMA_MAYWRITE_BIT, VMA_MAYEXEC_BIT) +#define VMA_DATA_FLAGS_EXEC mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, \ + VMA_EXEC_BIT, VMA_MAYREAD_BIT, VMA_MAYWRITE_BIT, \ + VMA_MAYEXEC_BIT) + +#ifndef VMA_DATA_DEFAULT_FLAGS /* arch can override this */ +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_EXEC #endif -#ifndef VM_STACK_DEFAULT_FLAGS /* arch can override this */ -#define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS +#ifndef VMA_STACK_DEFAULT_FLAGS /* arch can override this */ +#define VMA_STACK_DEFAULT_FLAGS VMA_DATA_DEFAULT_FLAGS #endif +#define VMA_STACK_FLAGS append_vma_flags(VMA_STACK_DEFAULT_FLAGS, \ + VMA_STACK_BIT, VMA_ACCOUNT_BIT) + +/* Temporary until VMA flags conversion complete. */ +#define VM_STACK_FLAGS vma_flags_to_legacy(VMA_STACK_FLAGS) + #define VM_STARTGAP_FLAGS (VM_GROWSDOWN | VM_SHADOW_STACK) #ifdef CONFIG_MSEAL_SYSTEM_MAPPINGS @@ -538,8 +549,6 @@ enum { #define VM_SEALED_SYSMAP VM_NONE #endif -#define VM_STACK_FLAGS (VM_STACK | VM_STACK_DEFAULT_FLAGS | VM_ACCOUNT) - /* VMA basic access permission flags */ #define VM_ACCESS_FLAGS (VM_READ | VM_WRITE | VM_EXEC) #define VMA_ACCESS_FLAGS mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT) @@ -549,6 +558,9 @@ enum { */ #define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP | VM_MIXEDMAP) +#define VMA_SPECIAL_FLAGS mk_vma_flags(VMA_IO_BIT, VMA_DONTEXPAND_BIT, \ + VMA_PFNMAP_BIT, VMA_MIXEDMAP_BIT) + /* * Physically remapped pages are special. Tell the * rest of the world about it: @@ -1337,7 +1349,7 @@ static inline void vma_desc_set_flags_mask(struct vm_area_desc *desc, * vm_area_desc object describing a proposed VMA, e.g.: * * vma_desc_set_flags(desc, VMA_IO_BIT, VMA_PFNMAP_BIT, VMA_DONTEXPAND_BIT, - * VMA_DONTDUMP_BIT); + * VMA_DONTDUMP_BIT); */ #define vma_desc_set_flags(desc, ...) \ vma_desc_set_flags_mask(desc, mk_vma_flags(__VA_ARGS__)) @@ -3962,7 +3974,6 @@ extern int replace_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file); extern struct file *get_mm_exe_file(struct mm_struct *mm); extern struct file *get_task_exe_file(struct task_struct *task); -extern bool may_expand_vm(struct mm_struct *, vm_flags_t, unsigned long npages); extern void vm_stat_account(struct mm_struct *, vm_flags_t, long npages); extern bool vma_is_special_mapping(const struct vm_area_struct *vma, diff --git a/mm/internal.h b/mm/internal.h index 95b583e7e4f7..9f0dbe835d86 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1848,4 +1848,7 @@ static inline int pmdp_test_and_clear_young_notify(struct vm_area_struct *vma, #endif /* CONFIG_MMU_NOTIFIER */ +bool may_expand_vm(struct mm_struct *mm, const vma_flags_t *vma_flags, + unsigned long npages); + #endif /* __MM_INTERNAL_H */ diff --git a/mm/ksm.c b/mm/ksm.c index 54758b3a8a93..876713a7df00 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -735,21 +735,24 @@ static int break_ksm(struct vm_area_struct *vma, unsigned long addr, return (ret & VM_FAULT_OOM) ? -ENOMEM : 0; } -static bool ksm_compatible(const struct file *file, vm_flags_t vm_flags) +static bool ksm_compatible(const struct file *file, vma_flags_t vma_flags) { - if (vm_flags & (VM_SHARED | VM_MAYSHARE | VM_SPECIAL | - VM_HUGETLB | VM_DROPPABLE)) - return false; /* just ignore the advice */ - + /* Just ignore the advice. */ + if (vma_flags_test_any(&vma_flags, VMA_SHARED_BIT, VMA_MAYSHARE_BIT, + VMA_HUGETLB_BIT)) + return false; + if (vma_flags_test_any_mask(&vma_flags, VMA_DROPPABLE)) + return false; + if (vma_flags_test_any_mask(&vma_flags, VMA_SPECIAL_FLAGS)) + return false; if (file_is_dax(file)) return false; - #ifdef VM_SAO - if (vm_flags & VM_SAO) + if (vma_flags_test(&vma_flags, VMA_SAO_BIT)) return false; #endif #ifdef VM_SPARC_ADI - if (vm_flags & VM_SPARC_ADI) + if (vma_flags_test(&vma_flags, VMA_SPARC_ADI_BIT)) return false; #endif @@ -758,7 +761,7 @@ static bool ksm_compatible(const struct file *file, vm_flags_t vm_flags) static bool vma_ksm_compatible(struct vm_area_struct *vma) { - return ksm_compatible(vma->vm_file, vma->vm_flags); + return ksm_compatible(vma->vm_file, vma->flags); } static struct vm_area_struct *find_mergeable_vma(struct mm_struct *mm, @@ -2825,17 +2828,17 @@ static int ksm_scan_thread(void *nothing) return 0; } -static bool __ksm_should_add_vma(const struct file *file, vm_flags_t vm_flags) +static bool __ksm_should_add_vma(const struct file *file, vma_flags_t vma_flags) { - if (vm_flags & VM_MERGEABLE) + if (vma_flags_test(&vma_flags, VMA_MERGEABLE_BIT)) return false; - return ksm_compatible(file, vm_flags); + return ksm_compatible(file, vma_flags); } static void __ksm_add_vma(struct vm_area_struct *vma) { - if (__ksm_should_add_vma(vma->vm_file, vma->vm_flags)) + if (__ksm_should_add_vma(vma->vm_file, vma->flags)) vm_flags_set(vma, VM_MERGEABLE); } @@ -2860,16 +2863,16 @@ static int __ksm_del_vma(struct vm_area_struct *vma) * * @mm: Proposed VMA's mm_struct * @file: Proposed VMA's file-backed mapping, if any. - * @vm_flags: Proposed VMA"s flags. + * @vma_flags: Proposed VMA"s flags. * - * Returns: @vm_flags possibly updated to mark mergeable. + * Returns: @vma_flags possibly updated to mark mergeable. */ -vm_flags_t ksm_vma_flags(struct mm_struct *mm, const struct file *file, - vm_flags_t vm_flags) +vma_flags_t ksm_vma_flags(struct mm_struct *mm, const struct file *file, + vma_flags_t vma_flags) { if (mm_flags_test(MMF_VM_MERGE_ANY, mm) && - __ksm_should_add_vma(file, vm_flags)) { - vm_flags |= VM_MERGEABLE; + __ksm_should_add_vma(file, vma_flags)) { + vma_flags_set(&vma_flags, VMA_MERGEABLE_BIT); /* * Generally, the flags here always include MMF_VM_MERGEABLE. * However, in rare cases, this flag may be cleared by ksmd who @@ -2879,7 +2882,7 @@ vm_flags_t ksm_vma_flags(struct mm_struct *mm, const struct file *file, __ksm_enter(mm); } - return vm_flags; + return vma_flags; } static void ksm_add_vmas(struct mm_struct *mm) diff --git a/mm/mmap.c b/mm/mmap.c index 2a0721e75988..ea48fce92ee5 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -192,7 +192,8 @@ SYSCALL_DEFINE1(brk, unsigned long, brk) brkvma = vma_prev_limit(&vmi, mm->start_brk); /* Ok, looks good - let it rip. */ - if (do_brk_flags(&vmi, brkvma, oldbrk, newbrk - oldbrk, 0) < 0) + if (do_brk_flags(&vmi, brkvma, oldbrk, newbrk - oldbrk, + EMPTY_VMA_FLAGS) < 0) goto out; mm->brk = brk; @@ -1203,7 +1204,8 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size, int vm_brk_flags(unsigned long addr, unsigned long request, bool is_exec) { - const vm_flags_t vm_flags = is_exec ? VM_EXEC : 0; + const vma_flags_t vma_flags = is_exec ? + mk_vma_flags(VMA_EXEC_BIT) : EMPTY_VMA_FLAGS; struct mm_struct *mm = current->mm; struct vm_area_struct *vma = NULL; unsigned long len; @@ -1230,7 +1232,7 @@ int vm_brk_flags(unsigned long addr, unsigned long request, bool is_exec) goto munmap_failed; vma = vma_prev(&vmi); - ret = do_brk_flags(&vmi, vma, addr, len, vm_flags); + ret = do_brk_flags(&vmi, vma, addr, len, vma_flags); populate = ((mm->def_flags & VM_LOCKED) != 0); mmap_write_unlock(mm); userfaultfd_unmap_complete(mm, &uf); @@ -1328,12 +1330,13 @@ void exit_mmap(struct mm_struct *mm) * Return true if the calling process may expand its vm space by the passed * number of pages */ -bool may_expand_vm(struct mm_struct *mm, vm_flags_t flags, unsigned long npages) +bool may_expand_vm(struct mm_struct *mm, const vma_flags_t *vma_flags, + unsigned long npages) { if (mm->total_vm + npages > rlimit(RLIMIT_AS) >> PAGE_SHIFT) return false; - if (is_data_mapping(flags) && + if (is_data_mapping_vma_flags(vma_flags) && mm->data_vm + npages > rlimit(RLIMIT_DATA) >> PAGE_SHIFT) { /* Workaround for Valgrind */ if (rlimit(RLIMIT_DATA) == 0 && diff --git a/mm/mprotect.c b/mm/mprotect.c index 9681f055b9fc..eaa724b99908 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -697,7 +697,8 @@ mprotect_fixup(struct vma_iterator *vmi, struct mmu_gather *tlb, unsigned long start, unsigned long end, vm_flags_t newflags) { struct mm_struct *mm = vma->vm_mm; - vm_flags_t oldflags = READ_ONCE(vma->vm_flags); + const vma_flags_t old_vma_flags = READ_ONCE(vma->flags); + vma_flags_t new_vma_flags = legacy_to_vma_flags(newflags); long nrpages = (end - start) >> PAGE_SHIFT; unsigned int mm_cp_flags = 0; unsigned long charged = 0; @@ -706,7 +707,7 @@ mprotect_fixup(struct vma_iterator *vmi, struct mmu_gather *tlb, if (vma_is_sealed(vma)) return -EPERM; - if (newflags == oldflags) { + if (vma_flags_same_pair(&old_vma_flags, &new_vma_flags)) { *pprev = vma; return 0; } @@ -717,8 +718,9 @@ mprotect_fixup(struct vma_iterator *vmi, struct mmu_gather *tlb, * uncommon case, so doesn't need to be very optimized. */ if (arch_has_pfn_modify_check() && - (oldflags & (VM_PFNMAP|VM_MIXEDMAP)) && - (newflags & VM_ACCESS_FLAGS) == 0) { + vma_flags_test_any(&old_vma_flags, VMA_PFNMAP_BIT, + VMA_MIXEDMAP_BIT) && + !vma_flags_test_any_mask(&new_vma_flags, VMA_ACCESS_FLAGS)) { pgprot_t new_pgprot = vm_get_page_prot(newflags); error = walk_page_range(current->mm, start, end, @@ -736,28 +738,31 @@ mprotect_fixup(struct vma_iterator *vmi, struct mmu_gather *tlb, * hugetlb mapping were accounted for even if read-only so there is * no need to account for them here. */ - if (newflags & VM_WRITE) { + if (vma_flags_test(&new_vma_flags, VMA_WRITE_BIT)) { /* Check space limits when area turns into data. */ - if (!may_expand_vm(mm, newflags, nrpages) && - may_expand_vm(mm, oldflags, nrpages)) + if (!may_expand_vm(mm, &new_vma_flags, nrpages) && + may_expand_vm(mm, &old_vma_flags, nrpages)) return -ENOMEM; - if (!(oldflags & (VM_ACCOUNT|VM_WRITE|VM_HUGETLB| - VM_SHARED|VM_NORESERVE))) { + if (!vma_flags_test_any(&old_vma_flags, + VMA_ACCOUNT_BIT, VMA_WRITE_BIT, VMA_HUGETLB_BIT, + VMA_SHARED_BIT, VMA_NORESERVE_BIT)) { charged = nrpages; if (security_vm_enough_memory_mm(mm, charged)) return -ENOMEM; - newflags |= VM_ACCOUNT; + vma_flags_set(&new_vma_flags, VMA_ACCOUNT_BIT); } - } else if ((oldflags & VM_ACCOUNT) && vma_is_anonymous(vma) && - !vma->anon_vma) { - newflags &= ~VM_ACCOUNT; + } else if (vma_flags_test(&old_vma_flags, VMA_ACCOUNT_BIT) && + vma_is_anonymous(vma) && !vma->anon_vma) { + vma_flags_clear(&new_vma_flags, VMA_ACCOUNT_BIT); } + newflags = vma_flags_to_legacy(new_vma_flags); vma = vma_modify_flags(vmi, *pprev, vma, start, end, &newflags); if (IS_ERR(vma)) { error = PTR_ERR(vma); goto fail; } + new_vma_flags = legacy_to_vma_flags(newflags); *pprev = vma; @@ -773,19 +778,24 @@ mprotect_fixup(struct vma_iterator *vmi, struct mmu_gather *tlb, change_protection(tlb, vma, start, end, mm_cp_flags); - if ((oldflags & VM_ACCOUNT) && !(newflags & VM_ACCOUNT)) + if (vma_flags_test(&old_vma_flags, VMA_ACCOUNT_BIT) && + !vma_flags_test(&new_vma_flags, VMA_ACCOUNT_BIT)) vm_unacct_memory(nrpages); /* * Private VM_LOCKED VMA becoming writable: trigger COW to avoid major * fault on access. */ - if ((oldflags & (VM_WRITE | VM_SHARED | VM_LOCKED)) == VM_LOCKED && - (newflags & VM_WRITE)) { - populate_vma_page_range(vma, start, end, NULL); + if (vma_flags_test(&new_vma_flags, VMA_WRITE_BIT)) { + const vma_flags_t mask = + vma_flags_and(&old_vma_flags, VMA_WRITE_BIT, + VMA_SHARED_BIT, VMA_LOCKED_BIT); + + if (vma_flags_same(&mask, VMA_LOCKED_BIT)) + populate_vma_page_range(vma, start, end, NULL); } - vm_stat_account(mm, oldflags, -nrpages); + vm_stat_account(mm, vma_flags_to_legacy(old_vma_flags), -nrpages); vm_stat_account(mm, newflags, nrpages); perf_event_mmap(vma); return 0; diff --git a/mm/mremap.c b/mm/mremap.c index 2be876a70cc0..0bbfc417a65c 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -1402,10 +1402,10 @@ static unsigned long mremap_to(struct vma_remap_struct *vrm) /* MREMAP_DONTUNMAP expands by old_len since old_len == new_len */ if (vrm->flags & MREMAP_DONTUNMAP) { - vm_flags_t vm_flags = vrm->vma->vm_flags; + vma_flags_t vma_flags = vrm->vma->flags; unsigned long pages = vrm->old_len >> PAGE_SHIFT; - if (!may_expand_vm(mm, vm_flags, pages)) + if (!may_expand_vm(mm, &vma_flags, pages)) return -ENOMEM; } @@ -1743,7 +1743,7 @@ static int check_prep_vma(struct vma_remap_struct *vrm) if (!mlock_future_ok(mm, vma->vm_flags & VM_LOCKED, vrm->delta)) return -EAGAIN; - if (!may_expand_vm(mm, vma->vm_flags, vrm->delta >> PAGE_SHIFT)) + if (!may_expand_vm(mm, &vma->flags, vrm->delta >> PAGE_SHIFT)) return -ENOMEM; return 0; diff --git a/mm/vma.c b/mm/vma.c index 6168bdc772de..2018504d115b 100644 --- a/mm/vma.c +++ b/mm/vma.c @@ -2384,7 +2384,7 @@ static void vms_abort_munmap_vmas(struct vma_munmap_struct *vms, static void update_ksm_flags(struct mmap_state *map) { - map->vm_flags = ksm_vma_flags(map->mm, map->file, map->vm_flags); + map->vma_flags = ksm_vma_flags(map->mm, map->file, map->vma_flags); } static void set_desc_from_map(struct vm_area_desc *desc, @@ -2445,7 +2445,7 @@ static int __mmap_setup(struct mmap_state *map, struct vm_area_desc *desc, } /* Check against address space limit. */ - if (!may_expand_vm(map->mm, map->vm_flags, map->pglen - vms->nr_pages)) + if (!may_expand_vm(map->mm, &map->vma_flags, map->pglen - vms->nr_pages)) return -ENOMEM; /* Private writable mapping: check memory availability. */ @@ -2867,20 +2867,22 @@ unsigned long mmap_region(struct file *file, unsigned long addr, return ret; } -/* +/** * do_brk_flags() - Increase the brk vma if the flags match. * @vmi: The vma iterator * @addr: The start address * @len: The length of the increase * @vma: The vma, - * @vm_flags: The VMA Flags + * @vma_flags: The VMA Flags * * Extend the brk VMA from addr to addr + len. If the VMA is NULL or the flags * do not match then create a new anonymous VMA. Eventually we may be able to * do some brk-specific accounting here. + * + * Returns: %0 on success, or otherwise an error. */ int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, - unsigned long addr, unsigned long len, vm_flags_t vm_flags) + unsigned long addr, unsigned long len, vma_flags_t vma_flags) { struct mm_struct *mm = current->mm; @@ -2888,9 +2890,12 @@ int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, * Check against address space limits by the changed size * Note: This happens *after* clearing old mappings in some code paths. */ - vm_flags |= VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags; - vm_flags = ksm_vma_flags(mm, NULL, vm_flags); - if (!may_expand_vm(mm, vm_flags, len >> PAGE_SHIFT)) + vma_flags_set_mask(&vma_flags, VMA_DATA_DEFAULT_FLAGS); + vma_flags_set(&vma_flags, VMA_ACCOUNT_BIT); + vma_flags_set_mask(&vma_flags, mm->def_vma_flags); + + vma_flags = ksm_vma_flags(mm, NULL, vma_flags); + if (!may_expand_vm(mm, &vma_flags, len >> PAGE_SHIFT)) return -ENOMEM; if (mm->map_count > sysctl_max_map_count) @@ -2904,7 +2909,7 @@ int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, * occur after forking, so the expand will only happen on new VMAs. */ if (vma && vma->vm_end == addr) { - VMG_STATE(vmg, mm, vmi, addr, addr + len, vm_flags, PHYS_PFN(addr)); + VMG_STATE(vmg, mm, vmi, addr, addr + len, vma_flags, PHYS_PFN(addr)); vmg.prev = vma; /* vmi is positioned at prev, which this mode expects. */ @@ -2925,8 +2930,8 @@ int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, vma_set_anonymous(vma); vma_set_range(vma, addr, addr + len, addr >> PAGE_SHIFT); - vm_flags_init(vma, vm_flags); - vma->vm_page_prot = vm_get_page_prot(vm_flags); + vma->flags = vma_flags; + vma->vm_page_prot = vm_get_page_prot(vma_flags_to_legacy(vma_flags)); vma_start_write(vma); if (vma_iter_store_gfp(vmi, vma, GFP_KERNEL)) goto mas_store_fail; @@ -2937,10 +2942,10 @@ int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, perf_event_mmap(vma); mm->total_vm += len >> PAGE_SHIFT; mm->data_vm += len >> PAGE_SHIFT; - if (vm_flags & VM_LOCKED) + if (vma_flags_test(&vma_flags, VMA_LOCKED_BIT)) mm->locked_vm += (len >> PAGE_SHIFT); if (pgtable_supports_soft_dirty()) - vm_flags_set(vma, VM_SOFTDIRTY); + vma_flags_set(&vma_flags, VMA_SOFTDIRTY_BIT); return 0; mas_store_fail: @@ -3071,7 +3076,7 @@ static int acct_stack_growth(struct vm_area_struct *vma, unsigned long new_start; /* address space limit tests */ - if (!may_expand_vm(mm, vma->vm_flags, grow)) + if (!may_expand_vm(mm, &vma->flags, grow)) return -ENOMEM; /* Stack limit test */ @@ -3290,7 +3295,6 @@ int insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma) { unsigned long charged = vma_pages(vma); - if (find_vma_intersection(mm, vma->vm_start, vma->vm_end)) return -ENOMEM; diff --git a/mm/vma.h b/mm/vma.h index cf8926558bf6..1f2de6cb3b97 100644 --- a/mm/vma.h +++ b/mm/vma.h @@ -237,13 +237,13 @@ static inline pgoff_t vma_pgoff_offset(struct vm_area_struct *vma, return vma->vm_pgoff + PHYS_PFN(addr - vma->vm_start); } -#define VMG_STATE(name, mm_, vmi_, start_, end_, vm_flags_, pgoff_) \ +#define VMG_STATE(name, mm_, vmi_, start_, end_, vma_flags_, pgoff_) \ struct vma_merge_struct name = { \ .mm = mm_, \ .vmi = vmi_, \ .start = start_, \ .end = end_, \ - .vm_flags = vm_flags_, \ + .vma_flags = vma_flags_, \ .pgoff = pgoff_, \ .state = VMA_MERGE_START, \ } @@ -465,7 +465,8 @@ unsigned long mmap_region(struct file *file, unsigned long addr, struct list_head *uf); int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *brkvma, - unsigned long addr, unsigned long request, unsigned long flags); + unsigned long addr, unsigned long request, + vma_flags_t vma_flags); unsigned long unmapped_area(struct vm_unmapped_area_info *info); unsigned long unmapped_area_topdown(struct vm_unmapped_area_info *info); @@ -527,6 +528,13 @@ static inline bool is_data_mapping(vm_flags_t flags) return (flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE; } +static inline bool is_data_mapping_vma_flags(const vma_flags_t *vma_flags) +{ + const vma_flags_t mask = vma_flags_and(vma_flags, + VMA_WRITE_BIT, VMA_SHARED_BIT, VMA_STACK_BIT); + + return vma_flags_same(&mask, VMA_WRITE_BIT); +} static inline void vma_iter_config(struct vma_iterator *vmi, unsigned long index, unsigned long last) diff --git a/mm/vma_exec.c b/mm/vma_exec.c index 8134e1afca68..5cee8b7efa0f 100644 --- a/mm/vma_exec.c +++ b/mm/vma_exec.c @@ -36,7 +36,8 @@ int relocate_vma_down(struct vm_area_struct *vma, unsigned long shift) unsigned long new_start = old_start - shift; unsigned long new_end = old_end - shift; VMA_ITERATOR(vmi, mm, new_start); - VMG_STATE(vmg, mm, &vmi, new_start, old_end, 0, vma->vm_pgoff); + VMG_STATE(vmg, mm, &vmi, new_start, old_end, EMPTY_VMA_FLAGS, + vma->vm_pgoff); struct vm_area_struct *next; struct mmu_gather tlb; PAGETABLE_MOVE(pmc, vma, vma, old_start, new_start, length); @@ -135,7 +136,7 @@ int create_init_stack_vma(struct mm_struct *mm, struct vm_area_struct **vmap, * use STACK_TOP because that can depend on attributes which aren't * configured yet. */ - BUILD_BUG_ON(VM_STACK_FLAGS & VM_STACK_INCOMPLETE_SETUP); + 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()) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index d8224ea113d1..903303e084c2 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -7713,6 +7713,8 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = { static __init int selinux_init(void) { + vma_flags_t data_default_flags = VMA_DATA_DEFAULT_FLAGS; + pr_info("SELinux: Initializing.\n"); memset(&selinux_state, 0, sizeof(selinux_state)); @@ -7729,7 +7731,7 @@ static __init int selinux_init(void) AUDIT_CFG_LSM_SECCTX_SUBJECT | AUDIT_CFG_LSM_SECCTX_OBJECT); - default_noexec = !(VM_DATA_DEFAULT_FLAGS & VM_EXEC); + default_noexec = !vma_flags_test(&data_default_flags, VMA_EXEC_BIT); if (!default_noexec) pr_notice("SELinux: virtual memory is executable by default\n"); diff --git a/tools/testing/vma/include/custom.h b/tools/testing/vma/include/custom.h index 92fe156ed7d6..e410cd5d368f 100644 --- a/tools/testing/vma/include/custom.h +++ b/tools/testing/vma/include/custom.h @@ -99,5 +99,3 @@ static inline void vma_lock_init(struct vm_area_struct *vma, bool reset_refcnt) if (reset_refcnt) refcount_set(&vma->vm_refcnt, 0); } -#define VMA_SPECIAL_FLAGS mk_vma_flags(VMA_IO_BIT, VMA_DONTEXPAND_BIT, \ - VMA_PFNMAP_BIT, VMA_MIXEDMAP_BIT) diff --git a/tools/testing/vma/include/dup.h b/tools/testing/vma/include/dup.h index c27fcfb50d8d..9a3fb99416d3 100644 --- a/tools/testing/vma/include/dup.h +++ b/tools/testing/vma/include/dup.h @@ -314,27 +314,33 @@ 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 TASK_EXEC ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) +#define TASK_EXEC_BIT ((current->personality & READ_IMPLIES_EXEC) ? \ + VM_EXEC_BIT : VM_READ_BIT) /* Common data flag combinations */ -#define VM_DATA_FLAGS_TSK_EXEC (VM_READ | VM_WRITE | TASK_EXEC | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) -#define VM_DATA_FLAGS_NON_EXEC (VM_READ | VM_WRITE | VM_MAYREAD | \ - VM_MAYWRITE | VM_MAYEXEC) -#define VM_DATA_FLAGS_EXEC (VM_READ | VM_WRITE | VM_EXEC | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) - -#ifndef VM_DATA_DEFAULT_FLAGS /* arch can override this */ -#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_EXEC +#define VMA_DATA_FLAGS_TSK_EXEC mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, \ + TASK_EXEC_BIT, VMA_MAYREAD_BIT, VMA_MAYWRITE_BIT, \ + VMA_MAYEXEC_BIT) +#define VMA_DATA_FLAGS_NON_EXEC mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, \ + VMA_MAYREAD_BIT, VMA_MAYWRITE_BIT, VMA_MAYEXEC_BIT) +#define VMA_DATA_FLAGS_EXEC mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, \ + VMA_EXEC_BIT, VMA_MAYREAD_BIT, VMA_MAYWRITE_BIT, \ + VMA_MAYEXEC_BIT) + +#ifndef VMA_DATA_DEFAULT_FLAGS /* arch can override this */ +#define VMA_DATA_DEFAULT_FLAGS VMA_DATA_FLAGS_EXEC #endif -#ifndef VM_STACK_DEFAULT_FLAGS /* arch can override this */ -#define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS +#ifndef VMA_STACK_DEFAULT_FLAGS /* arch can override this */ +#define VMA_STACK_DEFAULT_FLAGS VMA_DATA_DEFAULT_FLAGS #endif -#define VM_STARTGAP_FLAGS (VM_GROWSDOWN | VM_SHADOW_STACK) +#define VMA_STACK_FLAGS append_vma_flags(VMA_STACK_DEFAULT_FLAGS, \ + VMA_STACK_BIT, VMA_ACCOUNT_BIT) +/* Temporary until VMA flags conversion complete. */ +#define VM_STACK_FLAGS vma_flags_to_legacy(VMA_STACK_FLAGS) -#define VM_STACK_FLAGS (VM_STACK | VM_STACK_DEFAULT_FLAGS | VM_ACCOUNT) +#define VM_STARTGAP_FLAGS (VM_GROWSDOWN | VM_SHADOW_STACK) /* VMA basic access permission flags */ #define VM_ACCESS_FLAGS (VM_READ | VM_WRITE | VM_EXEC) @@ -345,6 +351,9 @@ enum { */ #define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP | VM_MIXEDMAP) +#define VMA_SPECIAL_FLAGS mk_vma_flags(VMA_IO_BIT, VMA_DONTEXPAND_BIT, \ + VMA_PFNMAP_BIT, VMA_MIXEDMAP_BIT) + #define VMA_REMAP_FLAGS mk_vma_flags(VMA_IO_BIT, VMA_PFNMAP_BIT, \ VMA_DONTEXPAND_BIT, VMA_DONTDUMP_BIT) @@ -357,11 +366,6 @@ enum { /* This mask represents all the VMA flag bits used by mlock */ #define VM_LOCKED_MASK (VM_LOCKED | VM_LOCKONFAULT) -#define TASK_EXEC ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) - -#define VM_DATA_FLAGS_TSK_EXEC (VM_READ | VM_WRITE | TASK_EXEC | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) - #define RLIMIT_STACK 3 /* max stack size */ #define RLIMIT_MEMLOCK 8 /* max locked-in-memory address space */ diff --git a/tools/testing/vma/include/stubs.h b/tools/testing/vma/include/stubs.h index 947a3a0c2566..e524873985fc 100644 --- a/tools/testing/vma/include/stubs.h +++ b/tools/testing/vma/include/stubs.h @@ -101,10 +101,10 @@ static inline bool shmem_file(struct file *file) return false; } -static inline vm_flags_t ksm_vma_flags(const struct mm_struct *mm, - const struct file *file, vm_flags_t vm_flags) +static inline vma_flags_t ksm_vma_flags(struct mm_struct *mm, + const struct file *file, vma_flags_t vma_flags) { - return vm_flags; + return vma_flags; } static inline void remap_pfn_range_prepare(struct vm_area_desc *desc, unsigned long pfn) @@ -239,7 +239,8 @@ static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) return 0; } -static inline bool may_expand_vm(struct mm_struct *mm, vm_flags_t flags, +static inline bool may_expand_vm(struct mm_struct *mm, + const vma_flags_t *vma_flags, unsigned long npages) { return true; diff --git a/tools/testing/vma/tests/merge.c b/tools/testing/vma/tests/merge.c index d3e725dc0000..44e3977e3fc0 100644 --- a/tools/testing/vma/tests/merge.c +++ b/tools/testing/vma/tests/merge.c @@ -1429,11 +1429,10 @@ static bool test_expand_only_mode(void) { vma_flags_t vma_flags = mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, VMA_MAYREAD_BIT, VMA_MAYWRITE_BIT); - vm_flags_t legacy_flags = VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE; struct mm_struct mm = {}; VMA_ITERATOR(vmi, &mm, 0); struct vm_area_struct *vma_prev, *vma; - VMG_STATE(vmg, &mm, &vmi, 0x5000, 0x9000, legacy_flags, 5); + VMG_STATE(vmg, &mm, &vmi, 0x5000, 0x9000, vma_flags, 5); /* * Place a VMA prior to the one we're expanding so we assert that we do -- 2.53.0
