linux-kernel - Re: [PATCH] usb: iowarrior: fix infoleak in iowarrior

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Message-ID: <cedf861a-bc1c-4677-983f-321407503f9e@suse.com>
Date: Thu, 12 Sep 2024 19:07:47 +0200
From: Oliver Neukum <oneukum@...e.com>
To: Jeongjun Park <aha310510@...il.com>, gregkh@...uxfoundation.org
Cc: colin.i.king@...il.com, kees@...nel.org, gustavo@...eddedor.com,
 linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
 syzbot+b8080cbc8d286a5fa23a@...kaller.appspotmail.com
Subject: Re: [PATCH] usb: iowarrior: fix infoleak in iowarrior_read()



On 12.09.24 18:34, Jeongjun Park wrote:
> The dev->read_queue buffer memory allocated from iowarrior_probe is
> allocated in an uninitialized state, and it is possible to copy the
> uninitialized memory area to the user buffer through iowarrior_read.

Hi,

I am very sorry, but this is not a proper fix. That this happens
shows that the driver has a bug in iowarrior_read(). Zeroing out
the buffer just papers over it.

	Regards
		Oliver