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[199.106.103.52]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39085dc396dsm1257090a91.3.2026.08.06.03.13.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Aug 2026 03:13:42 -0700 (PDT) From: Miaoqing Pan To: jjohnson@kernel.org Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Miaoqing Pan Subject: [PATCH ath-current v2 3/3] wifi: ath11k: unregister PM notifier on QMI init failure path Date: Thu, 6 Aug 2026 18:13:31 +0800 Message-Id: <20260806101331.484063-4-miaoqing.pan@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260806101331.484063-1-miaoqing.pan@oss.qualcomm.com> References: <20260806101331.484063-1-miaoqing.pan@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=aNzAb79m c=1 sm=1 tr=0 ts=6a745e58 cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=b9+bayejhc3NMeqCNyeLQQ==:17 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=EUspDBNiAAAA:8 a=FJAr2BPrIL5JYYbaf3kA:9 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-GUID: JyKKsSjBAAtozbBSJZameCajQuJilQIf X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODA2MDA4MCBTYWx0ZWRfXxty9jtfMbd4W CYX+oYyD06e4dYDvQudghILQBZTWiECCs+WkQze3jJqF/naa55kieVzi9+SK5xkolKDWnFdVXr0 0u5YFI3Iv/FYZgNpoZI3eeTqDlBhje6qhymVtOD6DiDc/Fn0WgB6ICWLLMtzjqfUPZCGYqGcFTF bbzdTScSW+w0XknTuAxng4g6lSmerTaA821aEyls+r6Csh/6lFIoo3iQ3+YktBrJuDkrD3js5Qg pM6Cwhc+DP7wMdnfx5+BePrh+JBev07Bpwt7hMl2P57xUBENE84DGQsjSdDXBBd5rJOl/V9bCOB v0msrwUf9i5sxv3YUUGukkTl86qAy61X27APzlFa8SLNr+P7ItZ6HcErsTN+6xvRmB0fd+EqnKX /U1iZNKQuBMM/Lk4nC1InyZ2TeotzvWqCpb6eD1VsE3buTR80J6RPvM2NxKThorglaDsKh1NDLU Hg66UVGJlSe6oRfJVTw== X-Proofpoint-ORIG-GUID: JyKKsSjBAAtozbBSJZameCajQuJilQIf X-Proofpoint-Spam-Info: AW1haW4tMjYwODA2MDA4MCBTYWx0ZWRfX3auwd22jJVQd EywxQNcgQggLvtzHWxAGhIoW8Ih4zl033C0ZSLb7mOGvm8yI16+xdDpm1Wnb/0+JyZN/NLrhXqw fMqK7TbR1Z+ZWA6hOBLbg6cTYPddrps= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-05_06,2026-08-05_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 suspectscore=0 adultscore=0 clxscore=1015 malwarescore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608060080 ath11k_core_init() registers a PM notifier before the QMI server becomes available. If the QMI server never arrives, the device remove() path can take the early-exit path introduced for QMI initialization failures, skipping ath11k_core_deinit(). As a result, the PM notifier remains registered after the ath11k base object has been freed. A subsequent suspend or resume event may invoke the stale notifier and trigger a use-after-free. Fix this by explicitly unregistering the PM notifier in the QMI failure cleanup path before releasing ath11k resources. Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.2.0.c2-00204-QCAMSLSWPLZ-1 Fixes: 32d93b51bc7e ("wifi: ath11k: choose default PM policy for hibernation") Signed-off-by: Miaoqing Pan --- drivers/net/wireless/ath/ath11k/ahb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c index c3ce5ea36e3c..ee3f493d2e44 100644 --- a/drivers/net/wireless/ath/ath11k/ahb.c +++ b/drivers/net/wireless/ath/ath11k/ahb.c @@ -1302,6 +1302,7 @@ static void ath11k_ahb_remove(struct platform_device *pdev) ath11k_ahb_power_down(ab, false); ath11k_debugfs_soc_destroy(ab); ath11k_qmi_deinit_service(ab); + ath11k_core_pm_notifier_unregister(ab); goto qmi_fail; } -- 2.34.1