Re: [PATCH AUTOSEL 5.15 22/41] video: fbdev: pxa3xx-gcu: Fix integer overflow in pxa3xx_gcu_write

[Sasha Levin]

On Mon, Sep 19, 2022 at 11:21:43AM +0300, Vitaly Chikunov wrote:
> On Mon, Jun 27, 2022 at 10:20:41PM -0400, Sasha Levin wrote:
> > From: Hyunwoo Kim <imv4bel@xxxxxxxxx>
> >
> > [ Upstream commit a09d2d00af53b43c6f11e6ab3cb58443c2cac8a7 ]
> >
> > In pxa3xx_gcu_write, a count parameter of type size_t is passed to words of
> > type int.  Then, copy_from_user() may cause a heap overflow because it is used
> > as the third argument of copy_from_user().
>
> Why this commit is still not in the stable branches?

Mostly because it's not tagged for stable.

But really, looks like I've missed a batch a few months ago, I can push
it for the next release cycle.

> Isn't this is the fix for CVE-2022-39842[1]?

How the heck did this thing get a CVE?

--
Thanks,
Sasha