linux-kernel - Re: [PATCH] drm/panel/hx83102: fix null pointer dereference in hx83102_get

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Message-ID: <2024082229-unretired-dallying-775d@gregkh>
Date: Thu, 22 Aug 2024 07:45:51 +0800
From: Greg KH <gregkh@...uxfoundation.org>
To: Charles Han <hanchunchao@...pur.com>
Cc: neil.armstrong@...aro.org, quic_jesszhan@...cinc.com,
	mripard@...nel.org, security@...nel.org,
	linux-kernel@...r.kernel.org, liuyanming@...system.com
Subject: Re: [PATCH] drm/panel/hx83102: fix null pointer dereference in
 hx83102_get_modes

On Wed, Aug 21, 2024 at 05:50:39PM +0800, Charles Han wrote:
> From: hanchunchao <hanchunchao@...pur.com>

Nit, this should be your name, not your email alias here, like you have
it on your "From" line.

> In hx83102_get_modes(), the return value of drm_mode_duplicate() is
> assigned to mode, which will lead to a possible NULL pointer dereference
> on failure of drm_mode_duplicate(). Add a check to avoid npd.
> 
> Signed-off-by: hanchunchao <hanchunchao@...pur.com>

Same here.

What commit id does this fix?  Shouldn't you also cc: stable to get it
backported?

And there's no need to cc: security@...nel.org, as this is a public
issue and you have a patch for it.

thanks,

greg k-h