linux-kernel - Re: [PATCH v3] wifi: ath9k: htc_hst: free skb in ath9k_htc_rx

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Date:   Wed, 04 Jan 2023 13:25:13 +0100
From:   Toke Høiland-Jørgensen <toke@...e.dk>
To:     Fedor Pchelkin <pchelkin@...ras.ru>, Kalle Valo <kvalo@...nel.org>
Cc:     Fedor Pchelkin <pchelkin@...ras.ru>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Sujith <Sujith.Manoharan@...eros.com>,
        "John W. Linville" <linville@...driver.com>,
        Vasanthakumar Thiagarajan <vasanth@...eros.com>,
        Senthil Balasubramanian <senthilkumar@...eros.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Alexey Khoroshilov <khoroshilov@...ras.ru>,
        lvc-project@...uxtesting.org,
        syzbot+e008dccab31bd3647609@...kaller.appspotmail.com,
        syzbot+6692c72009680f7c4eb2@...kaller.appspotmail.com
Subject: Re: [PATCH v3] wifi: ath9k: htc_hst: free skb in ath9k_htc_rx_msg()
 if there is no callback function

Fedor Pchelkin <pchelkin@...ras.ru> writes:

> It is stated that ath9k_htc_rx_msg() either frees the provided skb or
> passes its management to another callback function. However, the skb is
> not freed in case there is no another callback function, and Syzkaller was
> able to cause a memory leak. Also minor comment fix.

The comment fix seems to be missing from this version? So either it
should be reinstated, or the commit message updated to not mention it...

-Toke