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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=F9thClYQ; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 073AE606A31A; Tue, 27 Oct 2026 15:27:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=F9thClYQ Received: by smtp.kernel.org (Postfix) with ESMTPSA id 81D0A1F01825; Tue, 27 Oct 2026 15:27:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793114824; bh=wi0StJVtvw/zinVc4sKSY3h0wecMwn/MhOcHTKAD02s=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=F9thClYQkOQH0DL1SCEgrbzYuEQiLDXX04oG3zeeQiS9/a3WqSz0HLsb81+jWLl0Q VuOSq3y9r7DNp5PQcCzV/sa4iw3dxDA1RzLz47QtrwNJVo+seqFS7BblE9h+31apgG 7wEhg5JOS4GPxodIMZ2Iyop6JPEOTqLjJ69YFpGOmg/TbKzGm6x5Q5BBi6AoAFvPI8 F+b3zPpymGiuT51zSVXzkTa2V3ICWBTnyWKVK0IIzD0TxYOVUUJ4B1TCRxi+JvqdRk Wuq/rOZPJn0OxbY0peUoiYPnM6yp2kHKKTIQAtv5BRDTtSSjTByBrE2gz73slJy67V Ysy8utH+sZJ7A== Message-ID: Date: Tue, 27 Oct 2026 16:27:00 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mfd: hi655x-pmic: fix IRQ action memory leak on removal To: Guangshuo Li , Lee Jones , John Stultz , mfd@lists.linux.dev, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org References: <20261027024609.117371-1-lgs201920130244@gmail.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 27/10/2026 03:46, Guangshuo Li wrote: > hi655x_pmic_remove() currently removes the regmap IRQ chip before > removing the MFD child devices. regmap_del_irq_chip() disposes the > child IRQ mappings and removes their IRQ descriptors. > > The hi65xx-powerkey child registers interrupt handlers using > devm_request_any_context_irq(). During child device removal, the > device-managed cleanup calls free_irq(), but the corresponding IRQ > descriptors are no longer available. As a result, the allocated > struct irqaction objects referenced by irq_desc->action are not > freed, causing a memory leak. > > Remove the MFD child devices first, allowing their device-managed > IRQ handlers to be released while the IRQ mappings are still valid. > Then remove the regmap IRQ chip and its IRQ domain. > > This issue was found by our static analysis tool under development. More of postings by bot ignoring any feedback. Best regards, Krzysztof