linux-kernel - Re: [PATCH v2] wifi: wilc1000: use vmm

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Message-ID: <f286d5e476c78b29e1e6bbad641644e1@kernel.org>
Date:   Mon, 16 Oct 2023 13:41:01 +0200
From:   Michael Walle <mwalle@...nel.org>
To:     Alexis Lothoré <alexis.lothore@...tlin.com>
Cc:     Claudiu Beznea <claudiu.beznea@...on.dev>,
        Kalle Valo <kvalo@...nel.org>, 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 v2] wifi: wilc1000: use vmm_table as array in wilc struct

Am 2023-10-16 10:29, schrieb Alexis Lothoré:
> 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: Michael Walle <mwalle@...nel.org>

-michael