linux-kernel - [PATCH 03/20] btrfs_ioctl_send(): don't bother with access

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Message-Id: <20200509234557.1124086-3-viro@ZenIV.linux.org.uk>
Date:   Sun, 10 May 2020 00:45:40 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     linux-kernel@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org
Subject: [PATCH 03/20] btrfs_ioctl_send(): don't bother with access_ok()

From: Al Viro <viro@...iv.linux.org.uk>

we do copy_from_user() on that range anyway

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