Re: [PATCH 1/2] vfio: platform: Fix reset module leak in error path

[Geert Uytterhoeven]

Hi Eric,

On Wed, Feb 14, 2018 at 10:32 AM, Geert Uytterhoeven
<geert@xxxxxxxxxxxxxx> wrote:
> On Wed, Feb 14, 2018 at 9:36 AM, Auger Eric <eric.auger@xxxxxxxxxx> wrote:
>> If I am not wrong we also leak the reset_module if
>> vfio_platform_get_reset() fails to find the reset function (of_reset ==
>> NULL), in which case we should do the module_put() in
>> vfio_platform_get_reset().
>
> Correct. Will look into fixing it...

Upon second look, I don't think there's a leak in vfio_platform_get_reset().

If try_module_get() succeeded, there will always be a valid reset function
(unless someone registered a vfio_reset_handler with a NULL reset function).

Or do you mean the call to request_module()?
That one doesn't do a module_get(), it merely tries to load a module.
Hence there's no need to do a module_put() afterwards.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds