Re: BUG: sleeping function called from invalid context at ./include/linux/uaccess.h:LINE

David Hildenbrand
2017-11-06T16:19:34Z

On 06.11.2017 17:14, Paolo Bonzini wrote:
> On 06/11/2017 17:01, David Hildenbrand wrote:
>> On 06.11.2017 16:10, Nick Desaulniers wrote:
>>> Does it have to be stack allocated?
>>
>> We can't use kmalloc and friends in emulate.c. We would have to
>> introduce new emulator callbacks.
>>
>> a) for malloc and free. hmmm.
>> b) for carrying out the fxrstr/fixup.
>>
>> Paolo, what do you suggest?
>
> You can use kmalloc. Any userspace user of emulate.c would have to
> write a wrapper. But I'm not sure it's useful... maybe the
> asm_safe+memcpy could be moved to a separate noinline function, so that
> segmented_read_std is invoked with a leaner stack.

That's basically what we had before 9d643f63128b, however without the
"noinline".

--

Thanks,

David / dhildenb