Re: [Cocci] [PATCH v1] console: fix an issue about ioremap leak.

2020-04-28 Thread Dejin Zheng
On Thu, Apr 23, 2020 at 01:10:14PM +0200, Markus Elfring wrote:
> > if do_take_over_console() return an error in the newport_probe(),
> > due to the io virtual address is not released, it will cause a leak.
> 
> How do you think about a wording variant like the following?
> 
>Subject:
>[PATCH v2] console: Complete exception handling in newport_probe()
> 
>Change description:
>A call of the function “do_take_over_console” can fail here.
>The corresponding system resources were not released then.
>Thus add a call of the function “iounmap” together with the check
>of a failure predicate.
>
Thanks!

> 
> I would like to point out that there is a script for the semantic
> patch language which would detect other questionable source code.
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/log/scripts/coccinelle/free/iounmap.cocci
> 
> How do you think about to extend presented software analysis approaches?
>
Sorry, I am not familiar with it, I don't know.

BR,
Dejin

> Regards,
> Markus
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Re: [Cocci] [PATCH v1] console: fix an issue about ioremap leak.

2020-04-23 Thread Markus Elfring
> if do_take_over_console() return an error in the newport_probe(),
> due to the io virtual address is not released, it will cause a leak.

How do you think about a wording variant like the following?

   Subject:
   [PATCH v2] console: Complete exception handling in newport_probe()

   Change description:
   A call of the function “do_take_over_console” can fail here.
   The corresponding system resources were not released then.
   Thus add a call of the function “iounmap” together with the check
   of a failure predicate.


I would like to point out that there is a script for the semantic
patch language which would detect other questionable source code.
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/log/scripts/coccinelle/free/iounmap.cocci

How do you think about to extend presented software analysis approaches?

Regards,
Markus
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