Re: [LKP] bea5b158ff BUG: kernel reboot-without-warning in boot-around-mounting-root stage

[Greg Kroah-Hartman]

On Wed, Jan 02, 2019 at 09:15:12AM +0800, kernel test robot wrote:
> Greetings,
> 
> 0day kernel testing robot got the below dmesg and the first bad commit is
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> 
> commit bea5b158ff0da9c7246ff391f754f5f38e34577a
> Author:     Rob Herring <robh@xxxxxxxxxx>
> AuthorDate: Thu Aug 11 10:20:58 2016 -0500
> Commit:     Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> CommitDate: Wed Aug 31 15:13:55 2016 +0200
> 
>     driver core: add test of driver remove calls during probe
>     
>     In recent discussions on ksummit-discuss[1], it was suggested to do a
>     sequence of probe, remove, probe for testing driver remove paths. This
>     adds a kconfig option for said test.
>     
>     [1] https://lists.linuxfoundation.org/pipermail/ksummit-discuss/2016-August/003459.html
>     
>     Suggested-by: Arnd Bergmann <arnd@xxxxxxxx>
>     Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
>     Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
>     Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> 
> cebf8fd169  driver core: fix race between creating/querying glue dir and its cleanup
> bea5b158ff  driver core: add test of driver remove calls during probe
> e1ef035d27  Merge tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
> 6a1d293238  Add linux-next specific files for 20181224
> +----------------------------------------------------------------------+------------+------------+------------+---------------+
> |                                                                      | cebf8fd169 | bea5b158ff | e1ef035d27 | next-20181224 |
> +----------------------------------------------------------------------+------------+------------+------------+---------------+
> | boot_successes                                                       | 31         | 0          | 0          | 0             |
> | boot_failures                                                        | 0          | 11         | 11         | 7             |
> | BUG:kernel_reboot-without-warning_in_boot-around-mounting-root_stage | 0          | 11         | 11         | 7             |
> +----------------------------------------------------------------------+------------+------------+------------+---------------+
> 
> [   14.073515] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
> [   14.095297] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
> [   14.177113] serial8250: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
> [   14.256672] serial8250: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
> [   14.278578] console [ttyS0] disabled
> BUG: kernel reboot-without-warning in boot-around-mounting-root stage
> 
> 
>                                                           # HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
> git bisect start v4.9 v4.8 --

You are testing the 4.9 kernel release here?

A commit from 2016 is a "problem"?  Are you sure this is still an issue?

thanks,

greg k-h