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Date:   Tue, 28 May 2019 12:43:55 +0000 (UTC)
From:   Kalle Valo <>
To:     Jia-Ju Bai <>
Cc:,,,,,,, Jia-Ju Bai <>
Subject: Re: [PATCH] b43: Avoid possible double calls to b43_one_core_detach()

Jia-Ju Bai <> wrote:

> In b43_request_firmware(), when ieee80211_register_hw() fails,
> b43_one_core_detach() is called. In b43_bcma_remove() and
> b43_ssb_remove(), b43_one_core_detach() is called again. In this case, 
> null-pointer dereferences and double-free problems can occur when 
> the driver is removed.
> To fix this bug, the call to b43_one_core_detach() in
> b43_request_firmware() is deleted.
> This bug is found by a runtime fuzzing tool named FIZZER written by us.
> Signed-off-by: Jia-Ju Bai <>

Patch applied to wireless-drivers-next.git, thanks.

ec2e93cf1910 b43: Avoid possible double calls to b43_one_core_detach()


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