Re: [PATCH 1/1] vt_ioctl: prevent VT_RESIZEX font height change from causing potential out-of-bounds access

[George Kennedy]

Hi Greg,

I will re-work this patch based on comments from Dan.

Thank you,
George

On 7/29/2020 8:53 AM, Greg KH wrote:
> On Wed, Jul 29, 2020 at 08:39:41AM -0400, George Kennedy wrote:
> > Add a VT_RESIZEX check to ensure that changing the font height will not
> > cause a potential out-of-bounds access. The candidate font height contained
> > in "v_clin", though below the max, could still result in accesses beyond
> > the allocated font data size.
> >
> > Signed-off-by: George Kennedy <george.kennedy@xxxxxxxxxx>
> > Reported-by: syzbot+38a3699c7eaf165b97a6@xxxxxxxxxxxxxxxxxxxxxxxxx
> Did syzbot also test this that it fixes the reported issue?
>
> What commit does this fix?  Should it go back farther to stable releases
> too?
>
> thanks,
>
> greg k-h