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Message-ID: <ebe36c68-cdf9-b005-6d02-f72c3917d292@broadcom.com>
Date:   Wed, 19 Jan 2022 16:48:44 +0100
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Subject: Re: [PATCH] brcmfmac: firmware: Fix crash in brcm_alt_fw_path
To:     Phil Elwell <phil@raspberrypi.com>, Kalle Valo <kvalo@kernel.org>
Cc:     Arend van Spriel <aspriel@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        linux-wireless@vger.kernel.org,
        brcm80211-dev-list.pdl@broadcom.com,
        SHA-cyfmac-dev-list@infineon.com
References: <20220118154514.3245524-1-phil@raspberrypi.com>
 <87h7a0gt7f.fsf@kernel.org>
 <07dbaff1-bc12-d782-ed14-ef3f33d3c041@raspberrypi.com>
From:   Arend van Spriel <arend.vanspriel@broadcom.com>
In-Reply-To: <07dbaff1-bc12-d782-ed14-ef3f33d3c041@raspberrypi.com>
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On 1/19/2022 9:53 AM, Phil Elwell wrote:
> On 19/01/2022 06:01, Kalle Valo wrote:
>> Phil Elwell <phil@raspberrypi.com> writes:
>>
>>> The call to brcm_alt_fw_path in brcmf_fw_get_firmwares is not protected
>>> by a check to the validity of the fwctx->req->board_type pointer. This
>>> results in a crash in strlcat when, for example, the WLAN chip is found
>>> in a USB dongle.
>>>
>>> Prevent the crash by adding the necessary check.
>>>
>>> See: https://github.com/raspberrypi/linux/issues/4833
>>>
>>> Fixes: 5ff013914c62 ("brcmfmac: firmware: Allow per-board firmware 
>>> binaries")
>>> Signed-off-by: Phil Elwell <phil@raspberrypi.com>
>>
>> I think this should go to v5.17.
> 
> Is that an Ack? Are you asking me to submit the patch in a different way?

Similar/same patch was submitted by Hector Martin [1].

Regards,
Arend

[1] 
https://patchwork.kernel.org/project/linux-wireless/patch/20220117142919.207370-4-marcan@marcan.st/

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