From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S933501AbbLHQ1K (ORCPT <rfc822;w@1wt.eu>);
	Tue, 8 Dec 2015 11:27:10 -0500
Received: from casper.infradead.org ([85.118.1.10]:52222 "EHLO
	casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S933383AbbLHQ1I (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Tue, 8 Dec 2015 11:27:08 -0500
Date: Tue, 8 Dec 2015 17:27:05 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Ingo Molnar <mingo@redhat.com>, Arnaldo Carvalho de Melo <acme@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        syzkaller <syzkaller@googlegroups.com>,
        Kostya Serebryany <kcc@google.com>,
        Alexander Potapenko <glider@google.com>,
        Eric Dumazet <edumazet@google.com>,
        Sasha Levin <sasha.levin@oracle.com>
Subject: Re: use-after-free in __perf_install_in_context
Message-ID: <20151208162705.GC6357@twins.programming.kicks-ass.net>
References: <CACT4Y+bQqHPsxdh5nhSA154KeCxRirk8QGwRe-5pMUToGE8yAg@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CACT4Y+bQqHPsxdh5nhSA154KeCxRirk8QGwRe-5pMUToGE8yAg@mail.gmail.com>
User-Agent: Mutt/1.5.21 (2012-12-30)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Fri, Dec 04, 2015 at 09:04:35PM +0100, Dmitry Vyukov wrote:

> I was able to reproduce it by
> restricting syscalls only to perf_event_open, perf ioctls and bpf
> syscall.

Does that include cpu hotplug?

Sasha just reminded me there is a swevent use-after-free issue on
hotplug.