linux-kernel - Re: [PATCH 2/2] wifi: ath11k: fix dfs radar event locking

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Message-ID: <4262a250-585b-4cee-80d0-3fd56af94cad@quicinc.com>
Date:   Thu, 19 Oct 2023 08:08:12 -0700
From:   Jeff Johnson <quic_jjohnson@...cinc.com>
To:     Johan Hovold <johan+linaro@...nel.org>,
        Kalle Valo <kvalo@...nel.org>
CC:     Pradeep Kumar Chitrapu <quic_pradeepc@...cinc.com>,
        <ath11k@...ts.infradead.org>, <linux-wireless@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <stable@...r.kernel.org>
Subject: Re: [PATCH 2/2] wifi: ath11k: fix dfs radar event locking

On 10/19/2023 3:42 AM, Johan Hovold wrote:
> The ath11k active pdevs are protected by RCU but the DFS radar event
> handling code calling ath11k_mac_get_ar_by_pdev_id() was not marked as a
> read-side critical section.
> 
> Mark the code in question as an RCU read-side critical section to avoid
> any potential use-after-free issues.
> 
> Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
> Cc: stable@...r.kernel.org      # 5.6
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
Acked-by: Jeff Johnson <quic_jjohnson@...cinc.com>