linux-kernel - Re: [PATCH RESEND] drm/tegra: fix a possible null pointer dereference

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Message-ID: <qicxj23zxidfh4zqvrm5r2udcy57xo2dezvcaxuinannfhodxy@vueedaqco4t6>
Date: Wed, 7 May 2025 18:08:19 +0200
From: Thierry Reding <thierry.reding@...il.com>
To: Qiu-ji Chen <chenqiuji666@...il.com>
Cc: mperttunen@...dia.com, airlied@...il.com, simona@...ll.ch, 
	jonathanh@...dia.com, dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org, 
	linux-kernel@...r.kernel.org, baijiaju1990@...il.com, stable@...r.kernel.org
Subject: Re: [PATCH RESEND] drm/tegra: fix a possible null pointer dereference

On Wed, Feb 12, 2025 at 09:42:45AM +0800, Qiu-ji Chen wrote:
> In tegra_crtc_reset(), new memory is allocated with kzalloc(), but
> no check is performed. Before calling __drm_atomic_helper_crtc_reset,
> state should be checked to prevent possible null pointer dereference.
> 
> Fixes: b7e0b04ae450 ("drm/tegra: Convert to using __drm_atomic_helper_crtc_reset() for reset.")
> Cc: stable@...r.kernel.org
> Signed-off-by: Qiu-ji Chen <chenqiuji666@...il.com>
> ---
>  drivers/gpu/drm/tegra/dc.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)

Applied, thanks.

Thierry

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