diff options
Diffstat (limited to 'mm/mseal.c')
| -rw-r--r-- | mm/mseal.c | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/mm/mseal.c b/mm/mseal.c index c27197ac04e8..1308e88ab184 100644 --- a/mm/mseal.c +++ b/mm/mseal.c @@ -11,7 +11,6 @@ #include <linux/mman.h> #include <linux/mm.h> #include <linux/mm_inline.h> -#include <linux/mmu_context.h> #include <linux/syscalls.h> #include <linux/sched.h> #include "internal.h" @@ -21,54 +20,6 @@ static inline void set_vma_sealed(struct vm_area_struct *vma) vm_flags_set(vma, VM_SEALED); } -static bool is_madv_discard(int behavior) -{ - switch (behavior) { - case MADV_FREE: - case MADV_DONTNEED: - case MADV_DONTNEED_LOCKED: - case MADV_REMOVE: - case MADV_DONTFORK: - case MADV_WIPEONFORK: - case MADV_GUARD_INSTALL: - return true; - } - - return false; -} - -static bool is_ro_anon(struct vm_area_struct *vma) -{ - /* check anonymous mapping. */ - if (vma->vm_file || vma->vm_flags & VM_SHARED) - return false; - - /* - * check for non-writable: - * PROT=RO or PKRU is not writeable. - */ - if (!(vma->vm_flags & VM_WRITE) || - !arch_vma_access_permitted(vma, true, false, false)) - return true; - - return false; -} - -/* - * Check if a vma is allowed to be modified by madvise. - */ -bool can_modify_vma_madv(struct vm_area_struct *vma, int behavior) -{ - if (!is_madv_discard(behavior)) - return true; - - if (unlikely(!can_modify_vma(vma) && is_ro_anon(vma))) - return false; - - /* Allow by default. */ - return true; -} - static int mseal_fixup(struct vma_iterator *vmi, struct vm_area_struct *vma, struct vm_area_struct **prev, unsigned long start, unsigned long end, vm_flags_t newflags) |