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

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Message-ID: <edbcbe3f-9b5d-cead-5885-27bc55ef550b@lwfinger.net>
Date:   Sat, 4 Feb 2017 12:41:27 -0600
From:   Larry Finger <Larry.Finger@...inger.net>
To:     Dmitry Osipenko <digetx@...il.com>,
        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 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?

Larry

View attachment "reorder_private_data.patch" of type "text/x-patch" (1054 bytes)