Re: SKB dst field is NULL when AEAD request complete() is called

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The bug was: return value of my driver's encrypt() function should
have been -EINPROGRESS to support asynchronous operation.

Thanks.

On Thu, May 26, 2016 at 12:29 PM, Herbert Xu
<herbert@xxxxxxxxxxxxxxxxxxx> wrote:
> Denis B <begun.denis@xxxxxxxxx> wrote:
>> Working with kernel 3.12.14, in AEAD mode, I register my crypto driver
>> and the givencrypt() method in the driver gets called when I send
>> IPSec traffic. I store the request, and later call its complete()
>> method from a work queue. There is no actual encryption happening at
>> the moment, I'm just testing flow. As stated, the complete() call
>> stumbles upon a NULL pointer exception in xfrm_output_resume() because
>> skb_dst(skb) is NULL. When I receive the request in givencrypt(), dst
>> is not null in the SKB.
>>
>> Why would the framework meddle with the SKB? Has anyone experienced
>> anything similar?
>
> This is probably the result of some kind of a bug in your driver.
>
> If however you're sure that your driver is doing the right thing,
> then the bug would be in the network stack.  You should discuss
> networking issues on netdev@xxxxxxxxxxxxxxx.
>
> Cheers,
> --
> Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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