linux-kernel - Re: mwl8k: Fix a double Free in mwl8k_probe

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Date:   Sun, 18 Apr 2021 06:35:25 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Lv Yunlong <lyl2019@...l.ustc.edu.cn>
Cc:     buytenh@...tstofly.org, davem@...emloft.net, kuba@...nel.org,
        gustavoars@...nel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lv Yunlong <lyl2019@...l.ustc.edu.cn>
Subject: Re: mwl8k: Fix a double Free in mwl8k_probe_hw

Lv Yunlong <lyl2019@...l.ustc.edu.cn> wrote:

> In mwl8k_probe_hw, hw->priv->txq is freed at the first time by
> dma_free_coherent() in the call chain:
> if(!priv->ap_fw)->mwl8k_init_txqs(hw)->mwl8k_txq_init(hw, i).
> 
> Then in err_free_queues of mwl8k_probe_hw, hw->priv->txq is freed
> at the second time by mwl8k_txq_deinit(hw, i)->dma_free_coherent().
> 
> My patch set txq->txd to NULL after the first free to avoid the
> double free.
> 
> Fixes: a66098daacee2 ("mwl8k: Marvell TOPDOG wireless driver")
> Signed-off-by: Lv Yunlong <lyl2019@...l.ustc.edu.cn>

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

a8e083ee8e2a mwl8k: Fix a double Free in mwl8k_probe_hw

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20210402182627.4256-1-lyl2019@mail.ustc.edu.cn/

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