netdev - Re: [PATCH] ath9k: hif_usb: fix memory leak in ath9k_hif_usb_firmware

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Date:   Tue, 27 Jul 2021 09:02:21 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Dongliang Mu <mudongliangabcd@...il.com>
Cc:     ath9k-devel@....qualcomm.com,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Brooke Basile <brookebasile@...il.com>,
        syzbot+6692c72009680f7c4eb2@...kaller.appspotmail.com,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ath9k: hif_usb: fix memory leak in ath9k_hif_usb_firmware_cb

Dongliang Mu <mudongliangabcd@...il.com> writes:

> The commit 03fb92a432ea ("ath9k: hif_usb: fix race condition between
> usb_get_urb() and usb_kill_anchored_urbs()") adds three usb_get_urb
> in ath9k_hif_usb_dealloc_tx_urbs and usb_free_urb.
>
> Fix this bug by adding corresponding usb_free_urb in
> ath9k_hif_usb_dealloc_tx_urbs other and hif_usb_stop.
>
> Reported-by: syzbot+6692c72009680f7c4eb2@...kaller.appspotmail.com
> Fixes: 03fb92a432ea ("ath9k: hif_usb: fix race condition between usb_get_urb() and usb_kill_anchored_urbs()")
> Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>

In the past there have been so many problems with ath9k syzbot fixes
that I have now a hard time trusting them. Can someone review this in
detail, please?

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