From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D02E752BE3A; Wed, 30 Sep 2026 17:38:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790789901; cv=none; b=f2HDXUwueOV31sh9HDgzAmCcayMTUSiobtiu3hn0aGcjLEb0AtFryHVcZu1R6AGgfqTOFlvG6g9J7vEC+D7yRjorsFc5ovEoxfRHX7uvnqfylZQ0UVAkkuE2VmVnUGdvU8vHy//rEpXAjMEn1ZjDbgnIzSMiPYeXUxWJ+LD1pUE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790789901; c=relaxed/simple; bh=TB45VBJMM8eTAj+sXBQRghpQWqpWFOh+EOBUxcsFrGA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PaqeYMDPSM68cTaI6Xbrxp+aUl7qMfowMVhOQXVNkC86Tdu8Dr5KvqpIy/xTjjOyQFHB6o2wmbp68prFd6YmNIlke5rq/ezL51fUgS9nGMBnehIqan9VHQVXZSWa2za3ReTlLJDnzto3TCHddWBZFxJsscZZCi61qCAxZMsHTPo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=AytClbKo; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="AytClbKo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 247221F000FF; Wed, 30 Sep 2026 17:38:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790789899; bh=ssBoVVHqQmHga0LldOsX2EVmi6XXLcv4AqIMfo963W0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=AytClbKotMs6vhf9OT+roRM4e3AOmU6FjrpUfAwK+m1SheRYTXsxNgvrlSlZoblNV tWQKXxxqXxtBu+0PH9vmdzjStaFGphcLd76mPbqwusND94xqnVIzo8kz6iy0RZ74h2 H5VFiOINSDUlzbmvDaVE6y3e4HILBifvjVp1soV8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Fan Wu , Sebastian Reichel , Sasha Levin Subject: [PATCH 6.12 596/877] power: supply: qcom_battmgr: fix use-after-free Date: Wed, 30 Sep 2026 17:25:07 +0200 Message-ID: <20260930152427.514396128@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152414.738996857@linuxfoundation.org> References: <20260930152414.738996857@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fan Wu [ Upstream commit 4e40befedfc8ed86f44e1f81df92d13c149c9f8d ] qcom_battmgr_pdr_notify() queues enable_work when the PMIC GLINK service comes up, and the worker recovers battmgr through container_of() to issue firmware requests. The PMIC GLINK client stays on the client list until its devres release action runs, so a PDR notification can keep queueing the work, and a pending or running worker can access battmgr after devres frees it. Make enable_work device-managed with devm_work_autocancel(), registered before the PMIC GLINK client is allocated. The devres cleanup then releases the client first, so no further notification can queue the work, and cancels the work before battmgr is freed. This issue was found by an in-house static analysis tool. Fixes: 29e8142b5623 ("power: supply: Introduce Qualcomm PMIC GLINK power supply") Cc: stable@vger.kernel.org Assisted-by: Codex:gpt-5.6 Signed-off-by: Fan Wu Link: https://patch.msgid.link/20260731022006.317192-1-fanwu01@zju.edu.cn Link: https://patch.msgid.link/20260801051923.354496-1-fanwu01@zju.edu.cn Signed-off-by: Sebastian Reichel [ added the missing int ret declaration in qcom_battmgr_probe() ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/power/supply/qcom_battmgr.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/drivers/power/supply/qcom_battmgr.c +++ b/drivers/power/supply/qcom_battmgr.c @@ -4,6 +4,7 @@ * Copyright (c) 2022, Linaro Ltd */ #include +#include #include #include #include @@ -1335,6 +1336,7 @@ static int qcom_battmgr_probe(struct aux const struct of_device_id *match; struct qcom_battmgr *battmgr; struct device *dev = &adev->dev; + int ret; battmgr = devm_kzalloc(dev, sizeof(*battmgr), GFP_KERNEL); if (!battmgr) @@ -1350,7 +1352,6 @@ static int qcom_battmgr_probe(struct aux psy_cfg_supply.supplied_to = qcom_battmgr_battery; psy_cfg_supply.num_supplicants = 1; - INIT_WORK(&battmgr->enable_work, qcom_battmgr_enable_worker); mutex_init(&battmgr->lock); init_completion(&battmgr->ack); @@ -1397,6 +1398,11 @@ static int qcom_battmgr_probe(struct aux "failed to register wireless charing power supply\n"); } + ret = devm_work_autocancel(dev, &battmgr->enable_work, + qcom_battmgr_enable_worker); + if (ret) + return ret; + battmgr->client = devm_pmic_glink_client_alloc(dev, PMIC_GLINK_OWNER_BATTMGR, qcom_battmgr_callback, qcom_battmgr_pdr_notify,