[PATCH 03/20] btrfs_ioctl_send(): don't bother with access_ok()

From: Al Viro
Date: Sat May 09 2020 - 19:47:28 EST


From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

we do copy_from_user() on that range anyway

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
fs/btrfs/send.c | 7 -------
1 file changed, 7 deletions(-)

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index c5f41bd86765..6a92ecf9eaa2 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -7065,13 +7065,6 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
goto out;
}

- if (!access_ok(arg->clone_sources,
- sizeof(*arg->clone_sources) *
- arg->clone_sources_count)) {
- ret = -EFAULT;
- goto out;
- }
-
if (arg->flags & ~BTRFS_SEND_FLAG_MASK) {
ret = -EINVAL;
goto out;
--
2.11.0