Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754288AbdGSJwm (ORCPT ); Wed, 19 Jul 2017 05:52:42 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:38254 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754104AbdGSJq7 (ORCPT ); Wed, 19 Jul 2017 05:46:59 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrew Lunn , Srinivas Kandagatla , Mika Westerberg , Johan Hovold , Andrey Smirnov Subject: [PATCH 4.12 59/84] nvmem: core: fix leaks on registration errors Date: Wed, 19 Jul 2017 11:44:05 +0200 Message-Id: <20170719092324.672840420@linuxfoundation.org> X-Mailer: git-send-email 2.13.3 In-Reply-To: <20170719092322.362625377@linuxfoundation.org> References: <20170719092322.362625377@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1818 Lines: 64 4.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit 3360acdf839170b612f5b212539694c20e3f16d0 upstream. Make sure to deregister and release the nvmem device and underlying memory on registration errors. Note that the private data must be freed using put_device() once the struct device has been initialised. Also note that there's a related reference leak in the deregistration function as reported by Mika Westerberg which is being fixed separately. Fixes: b6c217ab9be6 ("nvmem: Add backwards compatibility support for older EEPROM drivers.") Fixes: eace75cfdcf7 ("nvmem: Add a simple NVMEM framework for nvmem providers") Cc: Andrew Lunn Cc: Srinivas Kandagatla Cc: Mika Westerberg Signed-off-by: Johan Hovold Acked-by: Andrey Smirnov Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman --- drivers/nvmem/core.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -489,21 +489,24 @@ struct nvmem_device *nvmem_register(cons rval = device_add(&nvmem->dev); if (rval) - goto out; + goto err_put_device; if (config->compat) { rval = nvmem_setup_compat(nvmem, config); if (rval) - goto out; + goto err_device_del; } if (config->cells) nvmem_add_cells(nvmem, config); return nvmem; -out: - ida_simple_remove(&nvmem_ida, nvmem->id); - kfree(nvmem); + +err_device_del: + device_del(&nvmem->dev); +err_put_device: + put_device(&nvmem->dev); + return ERR_PTR(rval); } EXPORT_SYMBOL_GPL(nvmem_register);