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[199.106.103.254]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2dd2cffb5c5sm14206325ad.80.2026.09.11.09.56.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Sep 2026 09:56:55 -0700 (PDT) Message-ID: Date: Fri, 11 Sep 2026 09:56:54 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH ath-next] ath9k: delete channel-context timers on deinit To: Rosen Penev , linux-wireless@vger.kernel.org Cc: =?UTF-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= , open list References: <20260904212225.84813-1-rosenp@gmail.com> From: Jeff Johnson Content-Language: en-US In-Reply-To: <20260904212225.84813-1-rosenp@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=Bv8IUoX5 c=1 sm=1 tr=0 ts=6aa432d9 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=VwQbUJbxAAAA:8 a=7eYl0IV7dGDCLOCTNgAA:9 a=QEXdDO2ut3YA:10 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-GUID: 8vqmhdMEaug_sx9bRWgEm5JfPJx6rA9j X-Proofpoint-Spam-Info: AW1haW4tMjYwOTExMDIzNyBTYWx0ZWRfX57KFz179LFc4 qRG8GKFkjGRam/qR1Kb96YkufYG5jtUn1B/50VymI8LmouesQmWpFOsYGB0lgUHZQ9FRpIEUJS5 M89kiMY2V3jCp2hKz9kHUAj+YARxFbM= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTExMDIzNyBTYWx0ZWRfXxKdEBCCmhJCL cqkqyv6SZls79G0WndPPRarHMs8xysR8bWdde8Rlaf2iPKjcOgH2oPIpIiaAq3eMMmf3LQX7SaU ZgaNLersnIDUr4PI4EJCEADYQMoJyQSW46fmopygQzUVpySkIH3T0FR5Gx68/YKs95wy6Orw8WF fqd4V3B7ibY2KnkThery4v5Icy9Ml7oqSefV5rmCzcY5DlLZY2myTZerD72yY50McgXajQHIQZv 8ylB57U6DPsMogz+05FHMT75hQxz8F6nj30uQ+HCXsJncHR9bCHTW0GT4mJBffJXzT/Pb2xIu6X TtXW1ii4lPSq4Ajn5LjD8JU23EqCg164d6CY3z46L4HlK1w6lJKOGr/AXB7kbPZ/UjYN+5hTivT wLfJDb81oFTJp4f2lTCqonQmnvvdxrYKg4aZVakOhZInF7QaXvnUX4ENWgvox5lHa8CIOULE+sn Eyo/BWBi0TiWcVfjSkQ== X-Proofpoint-ORIG-GUID: 8vqmhdMEaug_sx9bRWgEm5JfPJx6rA9j 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=2026-09-11_05,2026-09-11_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 priorityscore=1501 phishscore=0 impostorscore=0 adultscore=0 clxscore=1015 spamscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609110237 On 9/4/2026 2:22 PM, Rosen Penev wrote: > ath9k_deinit_channel_context() cancels chanctx_work but does not delete > the offchannel and sched timers set up by ath9k_init_channel_context(). > If either timer fires after deinit (e.g. during driver unload or > suspend), it accesses sc->sc_ah which may already be freed by > ath9k_hw_deinit(), causing a use-after-free. > > Delete both timers with timer_delete_sync() before cancelling the work > item. > > Assisted-by: opencode:big-pickle Current guidance is to just have Assisted-by: LLM https://docs.kernel.org/process/coding-assistants.html#attribution