linux-kernel - Re: [PATCH] gpu: drm: bridge: anx7625: Fix NULL pointer dereference with early IRQ

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Message-ID: <alk2ovpplncgr4qf4l37wt74olqs4zpu4pddveml6wpny5jlgg@5kqcrpsk62z6>
Date: Mon, 8 Sep 2025 20:24:30 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Loic Poulain <loic.poulain@....qualcomm.com>
Cc: andrzej.hajda@...el.com, neil.armstrong@...aro.org, rfoss@...nel.org,
        lumag@...nel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Laurent.pinchart@...asonboard.com,
        jonas@...boo.se, maarten.lankhorst@...ux.intel.com, mripard@...nel.org
Subject: Re: [PATCH] gpu: drm: bridge: anx7625: Fix NULL pointer dereference
 with early IRQ

On Wed, Jul 09, 2025 at 10:54:38AM +0200, Loic Poulain wrote:
> If the interrupt occurs before resource initialization is complete, the
> interrupt handler/worker may access uninitialized data such as the I2C
> tcpc_client device, potentially leading to NULL pointer dereference.
> 
> Signed-off-by: Loic Poulain <loic.poulain@....qualcomm.com>
> ---
>  drivers/gpu/drm/bridge/analogix/anx7625.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 

Fixes: 8bdfc5dae4e3 ("drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP")

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>

I will fix subject pick it up for drm-misc-fixes if nobody objects in
the next few days.

-- 
With best wishes
Dmitry