Re: [PATCH v3] kasan: add memory corruption identification for software tag-based mode

Andrey Ryabinin
2019-07-26T12:53:10Z

On 7/26/19 3:28 PM, Walter Wu wrote:
> On Fri, 2019-07-26 at 15:00 +0300, Andrey Ryabinin wrote:
>>
>
>>>
>>>
>>> I remember that there are already the lists which you concern. Maybe we
>>> can try to solve those problems one by one.
>>>
>>> 1. deadlock issue? cause by kmalloc() after kfree()?
>>
>> smp_call_on_cpu()
>
>>> 2. decrease allocation fail, to modify GFP_NOWAIT flag to GFP_KERNEL?
>>
>> No, this is not gonna work. Ideally we shouldn't have any allocations there.
>> It's not reliable and it hurts performance.
>>
> I dont know this meaning, we need create a qobject and put into
> quarantine, so may need to call kmem_cache_alloc(), would you agree this
> action?
>

How is this any different from what you have now?