On Sat, Apr 08, 2017 at 10:02:46AM +0800, Herbert Xu wrote:
> On Thu, Apr 06, 2017 at 05:54:14PM +0800, Herbert Xu wrote:
> > On Mon, Mar 13, 2017 at 07:06:01PM +0200, Krzysztof Kozlowski wrote:
> > >
> > > I bisected this to commit f1c131b45410 ("crypto: xts - Convert to
> > > skcipher"). The s5p-sss driver stays the same... but the xts changes and
> > > as a result we have a NULL pointer dereference (actually of value
> > > 00000004):
> > > [ 18.930195] Unable to handle kernel NULL pointer dereference at
> > > virtual address 00000004
> > > ...
> > > [ 18.972325] [<c0313c98>] (post_crypt) from [<c031408c>]
> > > (decrypt_done+0x4c/0x54)
> > > [ 18.972343] [<c031408c>] (decrypt_done) from [<c056309c>]
> > > (s5p_aes_interrupt+0x1bc/0x208)
> > > [ 18.972360] [<c056309c>] (s5p_aes_interrupt) from [<c0164930>]
> > > (irq_thread_fn+0x1c/0x54)
> > >
> > > Any hints?
> >
> > I haven't found any smoking guns, but the locking between the
> > tasklet and the IRQ routine looks suspect. First of all the
> > tasklet is modifying the dev structure without holding any locks.
>
> I think I see the problem. Could you please try this patch and
> let me know if it fixes the crash?
Yes, fixed! Thanks.
Tested on Odroid XU3 with following script:
https://github.com/krzk/tools/blob/master/tests/s5p-sss-cryptsetup.sh
Tested-by: Krzysztof Kozlowski <k...@kernel.org>
Best regards,
Krzysztof
