19 static inline void set_vma_sealed(struct vm_area_struct *vma)  in set_vma_sealed()  argument
21 	vm_flags_set(vma, VM_SEALED);  in set_vma_sealed()
40 static bool is_ro_anon(struct vm_area_struct *vma)  in is_ro_anon()  argument
43 	if (vma->vm_file || vma->vm_flags & VM_SHARED)  in is_ro_anon()
50 	if (!(vma->vm_flags & VM_WRITE) ||  in is_ro_anon()
51 		!arch_vma_access_permitted(vma, true, false, false))  in is_ro_anon()
60 bool can_modify_vma_madv(struct vm_area_struct *vma, int behavior)  in can_modify_vma_madv()  argument
65 	if (unlikely(!can_modify_vma(vma) && is_ro_anon(vma)))  in can_modify_vma_madv()
72 static int mseal_fixup(struct vma_iterator *vmi, struct vm_area_struct *vma,  in mseal_fixup()  argument
77 	vm_flags_t oldflags = vma->vm_flags;  in mseal_fixup()
82 	vma = vma_modify_flags(vmi, *prev, vma, start, end, newflags);  in mseal_fixup()
83 	if (IS_ERR(vma)) {  in mseal_fixup()
84 		ret = PTR_ERR(vma);  in mseal_fixup()
88 	set_vma_sealed(vma);  in mseal_fixup()
90 	*prev = vma;  in mseal_fixup()
103 	struct vm_area_struct *vma;  in check_mm_seal()  local
109 	for_each_vma_range(vmi, vma, end) {  in check_mm_seal()
110 		if (vma->vm_start > nstart)  in check_mm_seal()
114 		if (vma->vm_end >= end)  in check_mm_seal()
117 		nstart = vma->vm_end;  in check_mm_seal()
129 	struct vm_area_struct *vma, *prev;  in apply_mm_seal()  local
133 	vma = vma_iter_load(&vmi);  in apply_mm_seal()
139 	if (start > vma->vm_start)  in apply_mm_seal()
140 		prev = vma;  in apply_mm_seal()
143 	for_each_vma_range(vmi, vma, end) {  in apply_mm_seal()
148 		newflags = vma->vm_flags | VM_SEALED;  in apply_mm_seal()
149 		tmp = vma->vm_end;  in apply_mm_seal()
152 		error = mseal_fixup(&vmi, vma, &prev, nstart, tmp, newflags);  in apply_mm_seal()