Re: general protection fault in open_fs_devices

[Dmitry Vyukov]

On Wed, Jun 6, 2018 at 6:28 PM, Anand Jain <anand.jain@xxxxxxxxxx> wrote:
>
>
> On 06/06/2018 09:17 PM, syzbot wrote:
>
>
>
>  Which means there was some other thread which freed our %fs_devices.
>  As this thread is still in open_ctree() so the contending thread can't
>  be the ioctl(). So btrfs_free_stale_devices() is the only thread which
>  can free our %fs_devices in this case.
>
>  This is fixed in [1] in the mailing list.
>
>  [1]
>    [PATCH 3/3] btrfs: fix race between mkfs and mount


Let's tell about this syzbot:

#syz fix: btrfs: fix race between mkfs and mount