linux-kernel - Re: [PATCH] vfs: move_mount: reject moving kernel internal mounts

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Message-ID: <2578.1561966690@warthog.procyon.org.uk>
Date:   Mon, 01 Jul 2019 08:38:10 +0100
From:   David Howells <dhowells@...hat.com>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     dhowells@...hat.com, Eric Biggers <ebiggers@...nel.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [PATCH] vfs: move_mount: reject moving kernel internal mounts

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

> 	/* The thing moved must be mounted... */
> 	if (!is_mounted(old_path->mnt))
> 		goto out;

Um...  Doesn't that stuff up fsmount()?

David