Re: [PATCH] crypto: AF_ALG: handle 0 lengths in af_alg_make_sg

["Stephan Müller" <smueller@chronox.de>]

Am Samstag, 1. April 2017, 17:04:28 CEST schrieb Stephan Müller:

Hi Herbert,

> Hi Herbert,
> 
> If you concur with the patch, I think it should go to 4.11 as well as
> to stable.

After checking this issue again, I see that it is not triggerable in the 
current code as the different af_alg users make sure that this function is not 
called with 0.

I only triggered this issue during experimenting with the algif_skcipher and 
algif_aead revamp as requested by you. During those experiments, I invoked 
af_alg_make_sg with a len = 0.

Thus, this patch is not applicable for stable and 4.11.

Yet, I would suggest to consider this patch as a safeguard for any potential 
programming errors.

Ciao
Stephan