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 0483A3546EA; Sat, 30 May 2026 17:51:35 +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=1780163496; cv=none; b=fqoc+9JhU6GF1AlRHymLPj2wMYKKPfMqtkOO382vcwigJ4aNC1aEIIGf7XRpqhgf0BfOTbBa18AqLJDr+ilG2WKAQhSn6DaovexUBMWK+OM2EyWm6XOwgiQ4LKq0uJra0elfWfzXqSYoJTjbPN8bcs750Ba5HfqwQw2oODRV7EE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163496; c=relaxed/simple; bh=1TbaBIseIyDm8WTB0abjA2BdkGjWcl5f95jm3shkgQc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Jisx9KfdUpd+OMb+mME3RhrRX3lquI8QnbBX+JfNZdcxRT3QR2QeQSDjrvxqcXspDjpJkyR4pwHB1U/oTQIWRdp0pDj7RKC/hrbl+HW3TvDZQsbHu/0JD1MCOUsRjmpkUDinwiBTrRcMJn6p+CkxaulH7HTHNrSXyeV+ouo5R1k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pgiok1XW; 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="pgiok1XW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4A3FC1F00893; Sat, 30 May 2026 17:51:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780163494; bh=inbFKaHwdozIdJAg/kSPSc/JOSNBBUNI+zEedzObAr4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=pgiok1XWXULcXVi6cNujGEyQif2QSMqguWDDZxndO4dHnBOa3scufWD2FxOsaaJTr R+Vz8o3Jxn/AmqdJjvw/H5tnuaAgxyUsDVO1csCPlCh3zmoezagDAhhHrlZmV7xs7j vunjsDKy/UDWuLqjd1+6SLJQb+ekbzcBvnFvEcSk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Guangshuo Li , "Rafael J. Wysocki" Subject: [PATCH 5.15 276/776] ACPI: scan: Use acpi_dev_put() in object add error paths Date: Sat, 30 May 2026 17:59:50 +0200 Message-ID: <20260530160247.692839612@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Guangshuo Li commit 9c0acc169ac71535477caedea8315f7041c5f07c upstream. After acpi_init_device_object(), the lifetime of struct acpi_device is managed by the driver core through reference counting. Both acpi_add_power_resource() and acpi_add_single_object() call acpi_init_device_object() and then invoke acpi_device_add(). If that fails, their error paths call the release callback directly instead of dropping the device reference through acpi_dev_put(). This bypasses the normal device lifetime rules and frees the object without releasing the reference acquired by device_initialize(), which may lead to a refcount leak. The issue was identified by a static analysis tool I developed and confirmed by manual review. Fix both error paths by using acpi_dev_put() and let the release callback handle the final cleanup. Fixes: 781d737c7466 ("ACPI: Drop power resources driver") Fixes: 718fb0de8ff88 ("ACPI: fix NULL bug for HID/UID string") Cc: All applicable Signed-off-by: Guangshuo Li Link: https://patch.msgid.link/20260413135343.2884481-1-lgs201920130244@gmail.com Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/power.c | 2 +- drivers/acpi/scan.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/drivers/acpi/power.c +++ b/drivers/acpi/power.c @@ -962,7 +962,7 @@ struct acpi_device *acpi_add_power_resou return device; err: - acpi_release_power_resource(&device->dev); + acpi_dev_put(device); return NULL; } --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1824,7 +1824,7 @@ static int acpi_add_single_object(struct result = __acpi_device_add(device, acpi_device_release); if (result) { - acpi_device_release(&device->dev); + acpi_dev_put(device); return result; }