Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <1592410366125160@kroah.com>
In-Reply-To: <1592410366125160@kroah.com>
From:   Gabriel C <nix.or.die@googlemail.com>
Date:   Thu, 25 Jun 2020 00:05:54 +0200
Message-ID: <CAEJqkgjV8p6LtBV8YUGbNb0vYzKOQt4-AMAvYw5mzFr3eicyTg@mail.gmail.com>
Subject: Re: Linux 5.7.3
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        stable <stable@vger.kernel.org>, lwn@lwn.net,
        Jiri Slaby <jslaby@suse.cz>, angrypenguinpoland@gmail.com,
        Qiujun Huang <hqjagain@gmail.com>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Am Mi., 17. Juni 2020 um 18:13 Uhr schrieb Greg Kroah-Hartman
<gregkh@linuxfoundation.org>:
>
> I'm announcing the release of the 5.7.3 kernel.
>

Hello Greg,

> Qiujun Huang (5):
>       ath9k: Fix use-after-free Read in htc_connect_service
>       ath9k: Fix use-after-free Read in ath9k_wmi_ctrl_rx
>       ath9k: Fix use-after-free Write in ath9k_htc_rx_msg
>       ath9x: Fix stack-out-of-bounds Write in ath9k_hif_usb_rx_cb
>       ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb
>

We got a report on IRC about 5.7.3+ breaking a USB ath9k Wifi Dongle,
while working fine on <5.7.3.

I don't have myself such HW, and the reported doesn't have any experience
in bisecting the kernel, so we build kernels, each with one of the
above commits reverted,
to find the bad commit.

The winner is:

commit 6602f080cb28745259e2fab1a4cf55eeb5894f93
Author: Qiujun Huang <hqjagain@gmail.com>
Date:   Sat Apr 4 12:18:38 2020 +0800

    ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb

    commit 2bbcaaee1fcbd83272e29f31e2bb7e70d8c49e05 upstream.
...

Reverting this one fixed his problem.

I don't have so much info about the HW, besides a dmesg showing the
phy breaking.
I also added the reporter to CC too.

https://gist.github.com/AngryPenguinPL/1e545f0da3c2339e443b9e5044fcccea

If you need more info, please let me know and I'll try my best to get
it as fast as possible for you.


Best Regards,

Gabriel C