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Date: Fri, 21 Aug 2026 17:19:05 +0200
From: Greg KH <gregkh@linuxfoundation.org>
To: Jeffin Philip <jeffinphilip14@gmail.com>
Cc: heikki.krogerus@linux.intel.com, linux-kernel@vger.kernel.org,
	linux-usb@vger.kernel.org, mika.westerberg@linux.intel.com,
	stable@vger.kernel.org,
	syzbot+1a01783ea233350598b5@syzkaller.appspotmail.com,
	syzbot+520d7648a0d934061fb0@syzkaller.appspotmail.com
Subject: Re: [PATCH] usb: typec: fix null-pointer-dereference in
 wcove_typec_probe()
Message-ID: <2026082137-obscurity-french-4a2f@gregkh>
References: <2026082125-getting-upstroke-a146@gregkh>
 <20260821151107.19945-1-jeffinphilip14@gmail.com>
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In-Reply-To: <20260821151107.19945-1-jeffinphilip14@gmail.com>

On Fri, Aug 21, 2026 at 08:41:07PM +0530, Jeffin Philip wrote:
> On Fri, 21 Aug 2026 17:00:12 +0200, Greg KH wrote:
> >How can a platform device NOT have a parent device?  WHat system is this
> >broken in?  Why not fix the platform definition properly instead as
> >something is really wrong here if this is a "root" platform device as
> >that should never happen.
> 
> As seen in the Closes: tag, this is a syzbot issue. It used driver_override()
> to bind it in an unnatural way. So, I don't think it is possible in a real system.
> We could atleast validate pmic like other functions using dev_get_drvdata() or it
> could be left alone as is.

If you call bind on a device, you have to know what you are doing, as it
can easily crash as you see here.  Just fix syzbot please.