Re: [scsi] ae86a1c553: BUG:kernel_NULL_pointer_dereference,address

Ming Lei
2019-07-27T02:16:05Z

Hi,

Thanks for your report!

On Thu, Jul 25, 2019 at 06:46:29PM +0800, kernel test robot wrote:
> FYI, we noticed the following commit (built with gcc-7):
>
> commit: ae86a1c5530b52dc44a280e78feb0c4eb2dd8595 ("[PATCH V2 2/2] scsi: implement .cleanup_rq callback")
> url: https://github.com/0day-ci/linux/commits/Ming-Lei/blk-mq-add-callback-of-cleanup_rq/20190720-133431
>
>
> in testcase: blktests
> with following parameters:
>
> disk: 1SSD
> test: block-group1
>
>
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
>
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
>
>
> +---------------------------------------------------------------------------------------------------------------+------------+------------+
> | | bd222ca85f | ae86a1c553 |
> +---------------------------------------------------------------------------------------------------------------+------------+------------+
> | boot_successes | 0 | 0 |
> | boot_failures | 11 | 14 |
> | BUG:kernel_reboot-without-warning_in_test_stage | 11 | 1 |
> | BUG:kernel_NULL_pointer_dereference,address | 0 | 4 |
> | Oops:#[##] | 0 | 4 |
> | RIP:scsi_queue_rq | 0 | 4 |
> | Kernel_panic-not_syncing:Fatal_exception | 0 | 4 |
> | invoked_oom-killer:gfp_mask=0x | 0 | 9 |
> | Mem-Info | 0 | 9 |
> | page_allocation_failure:order:#,mode:#(GFP_KERNEL|__GFP_RETRY_MAYFAIL),nodemask=(null),cpuset=/,mems_allowed= | 0 | 2 |
> +---------------------------------------------------------------------------------------------------------------+------------+------------+
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <rong.a.chen@intel.com>
>
>
> [ 140.974865] BUG: kernel NULL pointer dereference, address: 000000000000001c

Yeah, I know this issue, and it has been fixed in either V3 or V4.

Thanks,
Ming