[PATCH v2] evm: Fix memory leak in init_desc

[Mimi Zohar]

Hi Dinghao,

On Sun, 2021-01-10 at 11:50 +0100, Markus Elfring wrote:
> > When kmalloc() fails, tmp_tfm allocated by
> > crypto_alloc_shash() has not been freed, which
> > leads to memleak.

In the future, please conform to Documentation/process/submitting-
patches.rst: 

  - The body of the explanation, line wrapped at 75 columns, which will
    be copied to the permanent changelog to describe this patch.

> 
> Do any Linux developers care for the following aspects?
> 
> * Imperative wordings for change descriptions
>   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?id=2ff90100ace886895e4fbb2850b8d5e49d931ed6#n89
> 
> * Usage of the term “memory leak” (instead of an abbreviation)

In general I agree, but this is a really small, obvious bug fix. 
Assuming Dinghao is fine with my updating the patch description, I'll
fix it.

Mimi