Re: [PATCH] crypto: testmgr: don't allocate IV on stack

[Gilad Ben-Yossef]

On Tue, Oct 31, 2017 at 9:59 AM, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote:
> On Tue, Oct 31, 2017 at 07:56:26AM +0000, Gilad Ben-Yossef wrote:
>> The IV was allocated on the stack in testmgr skcipher tests.
>> Since HW based tfm providers need to DMA the IV to the HW,
>> this leads to problems and is detected by the DMA-API debug
>> code.
>>
>> Fix it by allocating the IV using kmalloc instead.
>>
>> Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
>
> The driver that is mapping the IV directly should be fixed instead.
> Only input that is given in the form of SG lists can be mapped.
> Everything else should be copied if they need to go over DMA.

Got it. Will do.

Thanks,
Gilad

>
> Cheers,
> --
> Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt



-- 
Gilad Ben-Yossef
Chief Coffee Drinker

"If you take a class in large-scale robotics, can you end up in a
situation where the homework eats your dog?"
 -- Jean-Baptiste Queru