On 02/28/2017 06:12 AM, Fengguang Wu wrote:
> Hi Alexander,
>
> FYI, we find an old bug that's still alive in linux-next. The attached
> reproduce-* script may help debug the problem.
>
...
> +--------------------------------------------------------------------------------------+------------+------------+
> |
> | c146a2b98e | 80a9201a59 |
> +--------------------------------------------------------------------------------------+------------+------------+
> | boot_successes
> | 740 | 48 |
> | boot_failures
> | 0 | 142 |
> |
> BUG:kernel_reboot-without-warning_in_early-boot_stage,last_printk:Booting_the_kernel
> | 0 | 131 |
> | BUG:kernel_in_stage
> | 0 | 11 |
> +--------------------------------------------------------------------------------------+------------+------------+
>
Indeed it is an old bug, I'll send a fix shortly. But the bisection result is
not correct. This bug is actually much older.
Note that commit 80a9201a596 changes Kconfig dependency - it removes depends on
SLUB_DEBUG from config KASAN section.
And yours config has:
# CONFIG_SLUB_DEBUG is not set
So you simply test c146a2b98e with CONFIG_KASAN=n and 80a9201a59 with
CONFIG_KASAN=y
