diff options
| -rw-r--r-- | drivers/xen/xenfs/privcmd.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c index 6b602f50536..80526afd306 100644 --- a/drivers/xen/xenfs/privcmd.c +++ b/drivers/xen/xenfs/privcmd.c @@ -310,6 +310,8 @@ static int mmap_return_errors(void *data, void *state) return 0; } +static struct vm_operations_struct privcmd_vm_ops; + static long privcmd_ioctl_mmap_batch(void __user *udata) { int ret; @@ -341,6 +343,7 @@ static long privcmd_ioctl_mmap_batch(void __user *udata) vma = find_vma(mm, m.addr); ret = -EINVAL; if (!vma || + vma->vm_ops != &privcmd_vm_ops || (m.addr != vma->vm_start) || ((m.addr + (nr_pages << PAGE_SHIFT)) != vma->vm_end) || !privcmd_enforce_singleshot_mapping(vma)) { |