linux-kernel - Re: rtlwifi: rtl8192c_common: "BUG: KASAN: slab-out-of-bounds"

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Message-ID: <b100135b-97c4-b2bc-4f19-2574e573878b@gmail.com>
Date:   Sat, 4 Feb 2017 22:32:59 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Larry Finger <Larry.Finger@...inger.net>,
        Chaoming Li <chaoming_li@...lsil.com.cn>
Cc:     linux-wireless@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: rtlwifi: rtl8192c_common: "BUG: KASAN: slab-out-of-bounds"

On 04.02.2017 21:41, Larry Finger wrote:
> On 02/04/2017 10:58 AM, Dmitry Osipenko wrote:
>> Seems the problem is caused by rtl92c_dm_*() casting .priv to "struct
>> rtl_pci_priv", while it is "struct rtl_usb_priv".
> 
> Those routines are shared by rtl8192ce and rtl8192cu, thus we need to make that
> difference in cast to be immaterial. I think we need to move "struct
> bt_coexist_info" to the beginning of both rtlpci_priv and rtl_usb_priv. Then it
> should not matter.
> 
> I do not have a gcc version new enough to turn KASAN testing on, thus the
> attached patch is only compile tested. Does it fix the problem?

Thank you for the patch, it indeed fixes the bug.

I noticed that struct rtl_priv contains .btcoexist, isn't it duplicated in the
struct rtl_pci_priv?

-- 
Dmitry