From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 19 Feb 2020 14:35:32 +0000 (-0500)
Subject: btrfs_ioctl_send(): don't bother with access_ok()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=502fd722fe1ed0133d1108bff1d5911f46de6641;p=linux.git

btrfs_ioctl_send(): don't bother with access_ok()

we do copy_from_user() on that range anyway

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index c5f41bd86765f..6a92ecf9eaa27 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;