From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C95FEC636CC for ; Mon, 13 Feb 2023 15:04:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231352AbjBMPEY (ORCPT ); Mon, 13 Feb 2023 10:04:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38294 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231409AbjBMPEW (ORCPT ); Mon, 13 Feb 2023 10:04:22 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5C2531DBAF for ; Mon, 13 Feb 2023 07:04:05 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 0BF7FB80DF1 for ; Mon, 13 Feb 2023 15:04:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57A0EC433D2; Mon, 13 Feb 2023 15:04:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1676300642; bh=gg9l30VrfRNfwS+vaKboHqt5P7651ME5d+Nd4lXgvxE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=avgCQ5EKlcq9H3ZihTH/PCA5nmYIX83STTomCUII5XYeOAk/EnlBailC0cBImiHyj BqiQxDRrZtjW4krcznNDCtF8zLBSE3WtOU3WNMNnDFH7k1w3keuQZCGrJaR5aN1wRS /S8Yhd4GuueTOz4+vznfAQUD7Xu+63li00Hc9Bzc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, kernel test robot , Dan Carpenter , "Russell King (Oracle)" , Srinivas Kandagatla , Sasha Levin Subject: [PATCH 5.10 092/139] nvmem: core: fix cleanup after dev_set_name() Date: Mon, 13 Feb 2023 15:50:37 +0100 Message-Id: <20230213144750.677709781@linuxfoundation.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230213144745.696901179@linuxfoundation.org> References: <20230213144745.696901179@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Russell King (Oracle) [ Upstream commit 560181d3ace61825f4ca9dd3481d6c0ee6709fa8 ] If dev_set_name() fails, we leak nvmem->wp_gpio as the cleanup does not put this. While a minimal fix for this would be to add the gpiod_put() call, we can do better if we split device_register(), and use the tested nvmem_release() cleanup code by initialising the device early, and putting the device. This results in a slightly larger fix, but results in clear code. Note: this patch depends on "nvmem: core: initialise nvmem->id early" and "nvmem: core: remove nvmem_config wp_gpio". Fixes: 5544e90c8126 ("nvmem: core: add error handling for dev_set_name") Cc: stable@vger.kernel.org Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Russell King (Oracle) [Srini: Fixed subject line and error code handing with wp_gpio while applying.] Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20230127104015.23839-6-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman Stable-dep-of: ab3428cfd9aa ("nvmem: core: fix registration vs use race") Signed-off-by: Sasha Levin --- drivers/nvmem/core.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 38c05fce7d740..de356cdde4ce8 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -627,14 +627,18 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) nvmem->id = rval; + nvmem->dev.type = &nvmem_provider_type; + nvmem->dev.bus = &nvmem_bus_type; + nvmem->dev.parent = config->dev; + + device_initialize(&nvmem->dev); + if (!config->ignore_wp) nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp", GPIOD_OUT_HIGH); if (IS_ERR(nvmem->wp_gpio)) { - ida_free(&nvmem_ida, nvmem->id); rval = PTR_ERR(nvmem->wp_gpio); - kfree(nvmem); - return ERR_PTR(rval); + goto err_put_device; } kref_init(&nvmem->refcnt); @@ -646,9 +650,6 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) nvmem->stride = config->stride ?: 1; nvmem->word_size = config->word_size ?: 1; nvmem->size = config->size; - nvmem->dev.type = &nvmem_provider_type; - nvmem->dev.bus = &nvmem_bus_type; - nvmem->dev.parent = config->dev; nvmem->root_only = config->root_only; nvmem->priv = config->priv; nvmem->type = config->type; @@ -671,11 +672,8 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) break; } - if (rval) { - ida_free(&nvmem_ida, nvmem->id); - kfree(nvmem); - return ERR_PTR(rval); - } + if (rval) + goto err_put_device; nvmem->read_only = device_property_present(config->dev, "read-only") || config->read_only || !nvmem->reg_write; @@ -686,7 +684,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) dev_dbg(&nvmem->dev, "Registering nvmem device %s\n", config->name); - rval = device_register(&nvmem->dev); + rval = device_add(&nvmem->dev); if (rval) goto err_put_device; -- 2.39.0