From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:58422 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752703AbeBANPh (ORCPT ); Thu, 1 Feb 2018 08:15:37 -0500 Subject: Patch "perf/core: Fix memory leak triggered by perf --namespace" has been added to the 4.14-stable tree To: vvs@virtuozzo.com, acme@kernel.org, alexander.levin@verizon.com, alexander.shishkin@linux.intel.com, gregkh@linuxfoundation.org, hbathini@linux.vnet.ibm.com, jolsa@redhat.com, mingo@kernel.org, namhyung@kernel.org, peterz@infradead.org, tglx@linutronix.de, torvalds@linux-foundation.org Cc: , From: Date: Thu, 01 Feb 2018 14:13:47 +0100 Message-ID: <151749082718051@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled perf/core: Fix memory leak triggered by perf --namespace to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: perf-core-fix-memory-leak-triggered-by-perf-namespace.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Thu Feb 1 13:45:42 CET 2018 From: Vasily Averin Date: Wed, 15 Nov 2017 08:47:02 +0300 Subject: perf/core: Fix memory leak triggered by perf --namespace From: Vasily Averin [ Upstream commit 0e18dd12064e07519f7cbff4149ca7fff620cbed ] perf with --namespace key leaks various memory objects including namespaces 4.14.0+ pid_namespace 1 12 2568 12 8 user_namespace 1 39 824 39 8 net_namespace 1 5 6272 5 8 This happen because perf_fill_ns_link_info() struct patch ns_path: during initialization ns_path incremented counters on related mnt and dentry, but without lost path_put nobody decremented them back. Leaked dentry is name of related namespace, and its leak does not allow to free unused namespace. Signed-off-by: Vasily Averin Acked-by: Peter Zijlstra Cc: Alexander Shishkin Cc: Arnaldo Carvalho de Melo Cc: Hari Bathini Cc: Jiri Olsa Cc: Linus Torvalds Cc: Namhyung Kim Cc: Thomas Gleixner Fixes: commit e422267322cd ("perf: Add PERF_RECORD_NAMESPACES to include namespaces related info") Link: http://lkml.kernel.org/r/c510711b-3904-e5e1-d296-61273d21118d@virtuozzo.com Signed-off-by: Ingo Molnar Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- kernel/events/core.c | 1 + 1 file changed, 1 insertion(+) --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -6756,6 +6756,7 @@ static void perf_fill_ns_link_info(struc ns_inode = ns_path.dentry->d_inode; ns_link_info->dev = new_encode_dev(ns_inode->i_sb->s_dev); ns_link_info->ino = ns_inode->i_ino; + path_put(&ns_path); } } Patches currently in stable-queue which might be from vvs@virtuozzo.com are queue-4.14/lockd-fix-list_add-double-add-caused-by-legacy-signal-interface.patch queue-4.14/grace-replace-bug_on-by-warn_once-in-exit_net-hook.patch queue-4.14/perf-core-fix-memory-leak-triggered-by-perf-namespace.patch queue-4.14/race-of-lockd-inetaddr-notifiers-vs-nlmsvc_rqst-change.patch