Fengguang Wu <fengguang.wu@xxxxxxxxx> writes:
> Hi Chris,
>
>>+------------------------------------------+------------+------------+-----------+---------------+
>>| | 17aad8a340 | 4e64e5539d | v4.11-rc3 | next-20170320 |
>>+------------------------------------------+------------+------------+-----------+---------------+
>>| boot_successes | 0 | 0 | 0 | 0 |
>>| boot_failures | 1220 | 312 | 324 | 63 |
>>| BUG:unable_to_handle_kernel | 1220 | 312 | 324 | 63 |
>>| Oops:#[##] | 1220 | 312 | 324 | 63 |
>>| Kernel_panic-not_syncing:Fatal_exception | 1220 | 312 | 324 | 63 |
>>+------------------------------------------+------------+------------+-----------+---------------+
>>
>>[ 195.344608] [TTM] Zone kernel: Available graphics memory: 200980 kiB
>>[ 195.345639] [TTM] Initializing pool allocator
>>[ 195.346363] [TTM] Initializing DMA pool allocator
>>[ 195.347754] [drm] Initialized bochs-drm 1.0.0 20130925 for 0000:00:02.0 on minor 0
>>[ 195.349292] irq event stamp: 5513
>>[ 195.349293] BUG: unable to handle kernel NULL pointer dereference at 0000000000000620
>>[ 195.349309] IP: __lock_acquire+0xc8/0xfe6
>
>
> Sorry that looks like an old bug. While the below soft lockup
> call trace looks more related to the code change.
>
Hi,
For the record, I suspect the Null pointer dereference is already fixed in the tip
of drm-misc-next. See 4fa13dbe8c86 ("drm: bochs: Don't remove uninitialized fbdev framebuffer").
--
Gabriel Krisman Bertazi
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