diff options
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index a5e3dcd75e79..7f8cfe9d9b4d 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -94,7 +94,7 @@ static void unmap_region(struct mm_struct *mm, * w: (no) no * x: (yes) yes */ -pgprot_t protection_map[16] = { +pgprot_t protection_map[16] __ro_after_init = { __P000, __P001, __P010, __P011, __P100, __P101, __P110, __P111, __S000, __S001, __S010, __S011, __S100, __S101, __S110, __S111 }; @@ -3186,8 +3186,12 @@ static int special_mapping_mremap(struct vm_area_struct *new_vma) { struct vm_special_mapping *sm = new_vma->vm_private_data; + if (WARN_ON_ONCE(current->mm != new_vma->vm_mm)) + return -EFAULT; + if (sm->mremap) return sm->mremap(sm, new_vma); + return 0; } |
