linux-kernel - Re: [PATCH] wifi: ath11k: fix suspend use-after-free after probe failure

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Message-ID: <aFpingRwP3foaKJ9@hovoldconsulting.com>
Date: Tue, 24 Jun 2025 10:32:30 +0200
From: Johan Hovold <johan@...nel.org>
To: Johan Hovold <johan+linaro@...nel.org>
Cc: Jeff Johnson <jjohnson@...nel.org>, linux-wireless@...r.kernel.org,
	ath11k@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
	Baochen Qiang <quic_bqiang@...cinc.com>
Subject: Re: [PATCH] wifi: ath11k: fix suspend use-after-free after probe
 failure

On Tue, Jun 24, 2025 at 10:20:22AM +0200, Johan Hovold wrote:
> Make sure to deregister the PM notifier to avoid a use-after-free on
> suspend in case core initialisation fails (e.g. due to missing
> firmware).

Not sure it matters in this case, but forgot to include:

Tested-on: WCN6855 hw2.0 WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.41

> Fixes: 32d93b51bc7e ("wifi: ath11k: choose default PM policy for hibernation")
> Reported-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> Link: https://lore.kernel.org/all/d0cd065c-1cd1-4e56-8c57-60777b1f3664@oss.qualcomm.com/
> Cc: Baochen Qiang <quic_bqiang@...cinc.com>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Johan