Jia-Ju Bai [off-list ref] 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 <redacted>

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

ec2e93cf1910 b43: Avoid possible double calls to b43_one_core_detach()

-- 
https://patchwork.kernel.org/patch/10929623/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches