Re: Unitialized Variable and Null Pointer Dereference bug in gb_bootrom_get_firmware

From: Viresh Kumar
Date: Tue Jun 21 2022 - 22:19:59 EST


On 21-06-22, 16:40, Johan Hovold wrote:
> On Tue, Jun 21, 2022 at 10:36:04PM +0800, Dongliang Mu wrote:
> > Hi maintainers,
> >
> > I would like to send one bug report.
> >
> > In gb_bootrom_get_firmware, if the first branch is satisfied, it will
> > go to queue_work, leading to the dereference of uninitialized const
> > variable "fw". If the second branch is satisfied, it will go to unlock
> > with fw as NULL pointer, leading to a NULL Pointer Dereference.
>
> This sounds like the false positive that checkers keep tripping over.
>
> Please double check your analysis and search the archives first.

And everytime I get this report, I wonder if I should change the code to be a
bit simpler :)

--
viresh