Re: ubiblock: null pointer dereference using scatterlist in work_queue

Richard Weinberger
2023-08-09T22:44:03Z

----- Ursprüngliche Mail -----
> On Thu, Aug 10, 2023 at 12:34:44AM +0200, Richard Weinberger wrote:
>> Will do so! So far I managed to get UBIblock work with scsi_kmap_atomic_sg().
>> Sadly now with kmap'ed memory a bounce buffer is needed since IO in UBI/MTD can
>> sleep.
>> Is there a strong reason why scsi_kmap_atomic_sg() needs IRQs disabled?
>
> I don't think it needs irqs disabled. Also if you switch from the
> deprecated kmap_atomic to kmap_local first you can sleep and don't
> need bounce buffers.

Yep, for upstream kmap_local will do the trick, but I need also something
for the stable trees.
Anyway, time to get some sleep.

Thanks,
//richard