diff options
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index af3d573b0141..4e196155a0c3 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -168,6 +168,9 @@ static long madvise_remove(struct vm_area_struct *vma, return -EINVAL; } + if ((vma->vm_flags & (VM_SHARED|VM_WRITE)) != (VM_SHARED|VM_WRITE)) + return -EACCES; + mapping = vma->vm_file->f_mapping; offset = (loff_t)(start - vma->vm_start) |