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

From: Markus Elfring
Date: Thu Apr 23 2020 - 07:10:44 EST


> 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 âdo_take_over_consoleâ can fail here.
The corresponding system resources were not released then.
Thus add a call of the function âiounmapâ 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