linux-kernel - Re: [PATCH v3] wifi: wilc1000: use vmm

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Message-ID: <ac17b30f-3c3c-4384-a8a9-1b2c9d92ec3e@quicinc.com>
Date:   Tue, 17 Oct 2023 13:21:52 -0700
From:   Jeff Johnson <quic_jjohnson@...cinc.com>
To:     Alexis Lothoré <alexis.lothore@...tlin.com>,
        Claudiu Beznea <claudiu.beznea@...on.dev>,
        Kalle Valo <kvalo@...nel.org>,
        Michael Walle <mwalle@...nel.org>
CC:     <linux-wireless@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Ajay Singh <ajay.kathat@...rochip.com>,
        <stable@...r.kernel.org>
Subject: Re: [PATCH v3] wifi: wilc1000: use vmm_table as array in wilc struct

On 10/17/2023 1:43 AM, Alexis Lothoré wrote:
> From: Ajay Singh <ajay.kathat@...rochip.com>
> 
> Enabling KASAN and running some iperf tests raises some memory issues with
> vmm_table:
> 
> BUG: KASAN: slab-out-of-bounds in wilc_wlan_handle_txq+0x6ac/0xdb4
> Write of size 4 at addr c3a61540 by task wlan0-tx/95
> 
> KASAN detects that we are writing data beyond range allocated to vmm_table.
> There is indeed a mismatch between the size passed to allocator in
> wilc_wlan_init, and the range of possible indexes used later: allocation
> size is missing a multiplication by sizeof(u32)
> 
> Fixes: 40b717bfcefa ("wifi: wilc1000: fix DMA on stack objects")
> Cc: stable@...r.kernel.org
> Signed-off-by: Ajay Singh <ajay.kathat@...rochip.com>
> Signed-off-by: Alexis Lothoré <alexis.lothore@...tlin.com>

Reviewed-by: Jeff Johnson <quic_jjohnson@...cinc.com>