[PATCH v2] phy: tegra: xusb: Fix use-after-free issue

[Haotien Hsu]

On Tue, 2023-06-06 at 14:35 +0200, Thierry Reding wrote:
> On Mon, May 08, 2023 at 06:03:20PM +0800, Haotien Hsu wrote:
> > From: EJ Hsu <ejh at nvidia.com>
> > 
> > For the dual-role port, it will assign the phy dev to usb-phy dev
> > and
> > use the port dev driver as the dev driver of usb-phy.
> > 
> > When we try to destroy the port dev, it will destroy its dev driver
> > as well. But we did not remove the reference from usb-phy dev. This
> > might cause the use-after-free issue in KASAN.
> > 
> > Fixes: e8f7d2f409a1 ("phy: tegra: xusb: Add usb-phy support")
> > Cc: stable at vger.kernel.org
> > 
> > Signed-off-by: EJ Hsu <ejh at nvidia.com>
> > Signed-off-by: Haotien Hsu <haotienh at nvidia.com>
> > ---
> > V1 -> V2: Remove extra movements to clarify the change
> > ---
> >  drivers/phy/tegra/xusb.c | 1 +
> >  1 file changed, 1 insertion(+)
> 
> Haotien,
> 
> I had already given an Acked-by on v1. Typically you should add such
> tags when you post new versions so that people don't have to repeat
> them. Anyway, here it is again:
> 
> Acked-by: Thierry Reding <treding at nvidia.com>

Hi Thierry,

I see.
My mistake.