From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 51DD335A952; Fri, 9 Jan 2026 12:09:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767960553; cv=none; b=Ue494VfZGFXut6hI377o8ObdXMNT7ChItpuXfnHUgsktbqXG00wGGrzdpXMGlQ/aLZ88cSUoAcQsOTDTr7j3B9mqfQpJeGNPHtOa+rsdlEm4ABrkm/AEjXDVGNmzSVUZYgTxZmhzrHichVFLcdaUNUKZWMz0CR3cchD2Yah0TrA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767960553; c=relaxed/simple; bh=fMqT/7ljsmkqpwxNjYty9tVOIf/LgIdcJ87Jfzvx2Zs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KdvdbVNJew+ass6p3wY5eV9Dy4oefCFvKDIy2c9E558wPp/lS5dv24+fSIW6GQNgXCpbHIb7gQmlW9vjQR8cKhJMHjsF1paqwO3fuNoqJgIKrIGpVPDn5KiKhgcr2IXp6IVmSwFczAxMUsHDASgLJiiygzl+WHDC5578lMePd3Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=A/ycVWQh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="A/ycVWQh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C9F96C4CEF1; Fri, 9 Jan 2026 12:09:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767960553; bh=fMqT/7ljsmkqpwxNjYty9tVOIf/LgIdcJ87Jfzvx2Zs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=A/ycVWQhZQsjPzj+Bg+Soom9oJsZR2EjLeVvM1n0ozT8UXJwXFYdphR34DL/GdiqC GlQWLCStKFHI7z6d8H0NF0BPRfYr1MCQzem1S3DCdiwYjcAmVknkMEHlc5fnZ/DgLv vO4co6z/yZ0pSI4asFdAfzxnByOxNschGaq5fKVs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Miaoqian Lin , Viresh Kumar Subject: [PATCH 6.6 444/737] cpufreq: nforce2: fix reference count leak in nforce2 Date: Fri, 9 Jan 2026 12:39:43 +0100 Message-ID: <20260109112150.698958006@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112133.973195406@linuxfoundation.org> References: <20260109112133.973195406@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Miaoqian Lin commit 9600156bb99852c216a2128cdf9f114eb67c350f upstream. There are two reference count leaks in this driver: 1. In nforce2_fsb_read(): pci_get_subsys() increases the reference count of the PCI device, but pci_dev_put() is never called to release it, thus leaking the reference. 2. In nforce2_detect_chipset(): pci_get_subsys() gets a reference to the nforce2_dev which is stored in a global variable, but the reference is never released when the module is unloaded. Fix both by: - Adding pci_dev_put(nforce2_sub5) in nforce2_fsb_read() after reading the configuration. - Adding pci_dev_put(nforce2_dev) in nforce2_exit() to release the global device reference. Found via static analysis. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin Signed-off-by: Viresh Kumar Signed-off-by: Greg Kroah-Hartman --- drivers/cpufreq/cpufreq-nforce2.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/cpufreq/cpufreq-nforce2.c +++ b/drivers/cpufreq/cpufreq-nforce2.c @@ -145,6 +145,8 @@ static unsigned int nforce2_fsb_read(int pci_read_config_dword(nforce2_sub5, NFORCE2_BOOTFSB, &fsb); fsb /= 1000000; + pci_dev_put(nforce2_sub5); + /* Check if PLL register is already set */ pci_read_config_byte(nforce2_dev, NFORCE2_PLLENABLE, (u8 *)&temp); @@ -432,6 +434,7 @@ static int __init nforce2_init(void) static void __exit nforce2_exit(void) { cpufreq_unregister_driver(&nforce2_driver); + pci_dev_put(nforce2_dev); } module_init(nforce2_init);