linux-kernel - Re: [PATCH] net: wireless: b43: Avoid possible double calls to b43_one_core

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 06 May 2019 11:21:55 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Jia-Ju Bai <baijiaju1990@...il.com>
Cc:     davem@...emloft.net, colin.king@...onical.com,
        yuehaibing@...wei.com, linux-wireless@...r.kernel.org,
        b43-dev@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: wireless: b43: Avoid possible double calls to b43_one_core_detach()

Jia-Ju Bai <baijiaju1990@...il.com> writes:

> 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 <baijiaju1990@...il.com>
> ---
>  drivers/net/wireless/broadcom/b43/main.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)

You can use just "b43:" as prefix, no need to have "net:" nor
"wireless:" in the title. I'll fix it this time, but please use correct
style in the future.

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

-- 
Kalle Valo