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 83E16C433EF for ; Tue, 11 Jan 2022 07:49:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348695AbiAKHth (ORCPT ); Tue, 11 Jan 2022 02:49:37 -0500 Received: from mx3.molgen.mpg.de ([141.14.17.11]:42753 "EHLO mx1.molgen.mpg.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S235837AbiAKHth (ORCPT ); Tue, 11 Jan 2022 02:49:37 -0500 Received: from [192.168.0.5] (ip5f5aed25.dynamic.kabel-deutschland.de [95.90.237.37]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 936B761EA191E; Tue, 11 Jan 2022 08:49:34 +0100 (CET) Message-ID: <94e48fcd-1dbd-ebd2-4c91-f39941735909@molgen.mpg.de> Date: Tue, 11 Jan 2022 08:49:34 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.4.1 Content-Language: en-US To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org Cc: LKML From: Paul Menzel Subject: kmemleak detects leak in msr_build_context Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dear Linux folks, Running Linux from commit bf4eebf8cfa2 (Merge tag 'linux-kselftest-kunit-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest), kmemleak reported the leak below: ``` unreferenced object 0xffff8914823de500 (size 64): comm "swapper/0", pid 1, jiffies 4294667581 (age 1253.406s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 04 10 01 c0 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000007f3b05e9>] __kmalloc+0x177/0x330 [<0000000008104cca>] msr_build_context.constprop.0+0x32/0xbe [<00000000012bab4e>] msr_save_cpuid_features+0x28/0x2f [<00000000b7a2262e>] pm_check_save_msr+0x2e/0x40 [<00000000cbe9d92d>] do_one_initcall+0x44/0x200 [<0000000094deab7b>] kernel_init_freeable+0x1fc/0x273 [<00000000d3dbaa56>] kernel_init+0x16/0x160 [<0000000058c4a8b3>] ret_from_fork+0x22/0x30 ``` Kind regards, Paul