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>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
LKML <linux-kernel@vger.kernel.org>,
syzkaller <syzkaller@googlegroups.com>
Subject: Re: perf: use-after-free in perf_event_for_each
Date: Tue, 24 Jan 2017 14:49:18 +0100 [thread overview]
Message-ID: <20170124134918.GL6500@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CACT4Y+aGMyGtVs3x6Ua-njb4q4CxVdiy+zVAQa_hQa1JX+gLPg@mail.gmail.com>
On Tue, Jan 24, 2017 at 02:29:19PM +0100, Dmitry Vyukov wrote:
>
> Try to run more parallel processes at the same time.
> This program will run 32 processes in a tight loop:
> https://gist.githubusercontent.com/dvyukov/b36aa4398bb016923278fccdd1cc5b45/raw/9607078fd5ac2daf769c13d82561a83e17b06032/gistfile1.txt
> It triggered the UAF in several minutes for me. I have 4 CPUs in the
> VM. If you have more, set number of processes to 8*CPU.
No VM here, I'll up to 320 processes.
next prev parent reply other threads:[~2017-01-24 13:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-23 13:30 perf: use-after-free in perf_event_for_each Dmitry Vyukov
2017-01-23 17:04 ` Peter Zijlstra
2017-01-24 13:17 ` Peter Zijlstra
2017-01-24 13:29 ` Dmitry Vyukov
2017-01-24 13:49 ` Peter Zijlstra [this message]
2017-01-26 15:39 ` Peter Zijlstra
2017-01-27 9:08 ` Dmitry Vyukov
2017-01-27 13:02 ` Alexander Shishkin
2017-01-30 11:52 ` [tip:perf/core] perf/core: Fix use-after-free bug tip-bot for Peter Zijlstra
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