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From: Al Viro <viro@zeniv.linux.org.uk>
To: Eric Biggers <ebiggers@kernel.org>
Cc: linux-fsdevel@vger.kernel.org,
	David Howells <dhowells@redhat.com>,
	linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [PATCH] vfs: move_mount: reject moving kernel internal mounts
Date: Sat, 29 Jun 2019 21:39:16 +0100	[thread overview]
Message-ID: <20190629203916.GV17978@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20190629202744.12396-1-ebiggers@kernel.org>

On Sat, Jun 29, 2019 at 01:27:44PM -0700, Eric Biggers wrote:

> @@ -2600,7 +2600,7 @@ static int do_move_mount(struct path *old_path, struct path *new_path)
>  	if (attached && !check_mnt(old))
>  		goto out;
>  
> -	if (!attached && !(ns && is_anon_ns(ns)))
> +	if (!attached && !(ns && ns != MNT_NS_INTERNAL && is_anon_ns(ns)))
>  		goto out;
>  
>  	if (old->mnt.mnt_flags & MNT_LOCKED)

*UGH*

Applied, but that code is getting really ugly ;-/

  reply	other threads:[~2019-06-29 20:39 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-18 10:47 general protection fault in do_move_mount (2) syzbot
2019-06-18 14:02 ` Al Viro
2019-06-24  9:28   ` Dmitry Vyukov
2019-06-29 20:27     ` [PATCH] vfs: move_mount: reject moving kernel internal mounts Eric Biggers
2019-06-29 20:39       ` Al Viro [this message]
2019-07-01  1:08         ` Al Viro
2019-07-01 15:43           ` Eric Biggers
2019-07-01  7:38         ` David Howells
2019-07-01 11:19           ` Al Viro
2019-07-01 16:45       ` Eric Biggers
2019-07-01 18:22         ` Al Viro
2019-07-01 19:20           ` Al Viro
2019-07-02 18:22           ` Eric Biggers
2019-07-09 19:40             ` Eric Biggers
2019-07-09 20:54               ` Al Viro
2019-07-10  3:23                 ` 6 new syscalls without tests (was: [PATCH] vfs: move_mount: reject moving kernel internal mounts) Eric Biggers
2019-07-05  9:01           ` move_mount.2 David Howells
2019-06-29 20:39     ` general protection fault in do_move_mount (2) Eric Biggers
2019-07-01 14:59       ` Dmitry Vyukov
2019-07-01 15:18         ` Eric Biggers
2019-07-05 12:17           ` Dmitry Vyukov
2019-07-05 13:02           ` Dmitry Vyukov

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