Bug#649847: BUG at fs/btrfs/super.c:984 running df on seed Btrfs filesystem

[Jonathan Nieder <jrnieder@gmail.com>]

tags 649847 + upstream patch
quit

Hi,

Ivan Vilata i Balaguer wrote[1]:

> Hi!  Mounting a Btrfs seed filesystem (read-only, with no writable devices
> added to it) and then running df
[...]
> kernel BUG at [...]/fs/btrfs/super.c:984!
[...]
>   [<c10d143e>] ? user_path_at_empty+0x46/0x64
>   [<c10e3a2b>] ? statfs_by_dentry+0x3b/0x4f
>   [<c10e3a4e>] ? vfs_statfs+0xf/0x80

Should be fixed by [1], which is not in Chris's or Josef's tree for
some reason.

If you have time to try the patch[2], that would be excellent.

Thanks,
Jonathan

[1] http://thread.gmane.org/gmane.comp.file-systems.btrfs/12319
[2] http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s4.2.2