linux-kernel - Re: [PATCH v5.10] staging: rtl8723bs: prevent ->Ssid overflow in rtw_wx_set

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Date:   Mon, 23 May 2022 21:41:09 +0400
From:   Denis Efremov <efremov@...ux.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Larry.Finger@...inger.net, phil@...lpotter.co.uk,
        dan.carpenter@...cle.com, straube.linux@...il.com,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org, stable <stable@...r.kernel.org>
Subject: Re: [PATCH v5.10] staging: rtl8723bs: prevent ->Ssid overflow in
 rtw_wx_set_scan()

Hi,

On 5/23/22 19:26, Greg KH wrote:
> On Fri, May 20, 2022 at 07:57:30AM +0400, Denis Efremov (Oracle) wrote:
>> This code has a check to prevent read overflow but it needs another
>> check to prevent writing beyond the end of the ->Ssid[] array.
>>
>> Fixes: 554c0a3abf21 ("staging: Add rtl8723bs sdio wifi driver")
>> Cc: stable <stable@...r.kernel.org>
>> Signed-off-by: Denis Efremov (Oracle) <efremov@...ux.com>
>> ---
>>  drivers/staging/rtl8723bs/os_dep/ioctl_linux.c | 6 ++++--
>>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> And only 5.10 needs this?  What about all other kernel branches?
> 

>From 5.10, 5.4, 4.19, to 4.14.

There is a small spaces conflict in 5.4-4.14 kernels because of
c77761d660a6 staging: rtl8723bs: Fix spacing issues

I sent another patch to handle it.

Thanks,
Denis