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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 359CCC2BA4C for ; Mon, 15 Nov 2021 20:04:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2183A61B93 for ; Mon, 15 Nov 2021 20:04:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348505AbhKOUEb (ORCPT ); Mon, 15 Nov 2021 15:04:31 -0500 Received: from mail.kernel.org ([198.145.29.99]:46094 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239588AbhKOSDU (ORCPT ); Mon, 15 Nov 2021 13:03:20 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7A5A3632DB; Mon, 15 Nov 2021 17:37:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1636997857; bh=1b1DCiBnuzfdBPAF32D2UpkHdSRFO5JOBtELVSsR/CE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZvzIFgmvTSi2/+5aIfog5cVbU/FRClGv0rFbeEecFvJlvfZtwpO5BAmqvfGO9fA/R bYR6sbluOijIPeuwIVYeUQSvQ6xdkpgRZ5IsDeqIDdt5fmY+SlzVJEPGwvDXxwlx0E ke7DTjAmmgz7ldieT9Eut3SOmVtCAcbw41Vuth+I= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anel Orazgaliyeva , Aman Priyadarshi , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 5.10 301/575] cpuidle: Fix kobject memory leaks in error paths Date: Mon, 15 Nov 2021 18:00:26 +0100 Message-Id: <20211115165354.184089587@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115165343.579890274@linuxfoundation.org> References: <20211115165343.579890274@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Anel Orazgaliyeva [ Upstream commit e5f5a66c9aa9c331da5527c2e3fd9394e7091e01 ] Commit c343bf1ba5ef ("cpuidle: Fix three reference count leaks") fixes the cleanup of kobjects; however, it removes kfree() calls altogether, leading to memory leaks. Fix those and also defer the initialization of dev->kobj_dev until after the error check, so that we do not end up with a dangling pointer. Fixes: c343bf1ba5ef ("cpuidle: Fix three reference count leaks") Signed-off-by: Anel Orazgaliyeva Suggested-by: Aman Priyadarshi [ rjw: Subject edits ] Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/cpuidle/sysfs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c index 53ec9585ccd44..469e18547d06c 100644 --- a/drivers/cpuidle/sysfs.c +++ b/drivers/cpuidle/sysfs.c @@ -488,6 +488,7 @@ static int cpuidle_add_state_sysfs(struct cpuidle_device *device) &kdev->kobj, "state%d", i); if (ret) { kobject_put(&kobj->kobj); + kfree(kobj); goto error_state; } cpuidle_add_s2idle_attr_group(kobj); @@ -619,6 +620,7 @@ static int cpuidle_add_driver_sysfs(struct cpuidle_device *dev) &kdev->kobj, "driver"); if (ret) { kobject_put(&kdrv->kobj); + kfree(kdrv); return ret; } @@ -705,7 +707,6 @@ int cpuidle_add_sysfs(struct cpuidle_device *dev) if (!kdev) return -ENOMEM; kdev->dev = dev; - dev->kobj_dev = kdev; init_completion(&kdev->kobj_unregister); @@ -713,9 +714,11 @@ int cpuidle_add_sysfs(struct cpuidle_device *dev) "cpuidle"); if (error) { kobject_put(&kdev->kobj); + kfree(kdev); return error; } + dev->kobj_dev = kdev; kobject_uevent(&kdev->kobj, KOBJ_ADD); return 0; -- 2.33.0