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>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
syzkaller <syzkaller@googlegroups.com>,
Oleg Nesterov <oleg@redhat.com>
Subject: Re: perf: use-after-free in perf_release
Date: Tue, 7 Mar 2017 10:37:59 +0100 [thread overview]
Message-ID: <20170307093759.GU6500@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CACT4Y+YtqAJHx02+tbHmV3wV008B1WhnO5qzMQ_8OTAsMmTf8Q@mail.gmail.com>
On Tue, Mar 07, 2017 at 10:26:20AM +0100, Dmitry Vyukov wrote:
> On Tue, Mar 7, 2017 at 10:08 AM, Peter Zijlstra <peterz@infradead.org> wrote:
> > On Mon, Mar 06, 2017 at 02:34:50PM +0100, Dmitry Vyukov wrote:
> >> FWIW here are 2 syzkaller programs that triggered the bug:
> >> https://gist.githubusercontent.com/dvyukov/d67f980050589775237a7fbdff226bec/raw/4bca72861cb2ede64059b6dad403e19f425a361f/gistfile1.txt
> >
> > Hurm, previously your gistfile thingies were actual C, but this thing is
> > gibberish. How do I run it?
>
> The same way we did it here:
> https://groups.google.com/d/msg/syzkaller/MHXa-o8foyc/yrGfDOrwAQAJ
Oh right, completely forgot about that. The last gistfile stuff I found
in my history were actual C files.
> This will run it in infinite loop in 10 parallel processes:
> ./syz-execprog -repeat=0 -procs=10 -sandbox=namespace gistfile1.txt
> -sandbox=namespace will require CONFIG_USER_NS=y, I am not sure if it
> is actually required, but that's how bots triggered it. You can do
> -sandbox=none as well.
I still have an ancient syzcaller; -sandbox doesn't exist and I needed
to add -executor=bin/syz-executor but now it appears to run.
I'll go up procs, 10 is somewhat low I feel.
---
root@ivb-ep:~/gopath/src/github.com/google/syzkaller# ./bin/syz-execprog -repeat=0 -procs=10 -executor=bin/syz-executor gistfile2.txt
2017/03/07 10:35:14 parsed 2 programs
2017/03/07 10:35:14 executed 0 programs
result: failed=false hanged=false err=executor is not serving
2017/03/07 10:36:14 executed 10 programs
result: failed=false hanged=false err=executor is not serving
result: failed=false hanged=false err=executor is not serving
result: failed=false hanged=false err=executor is not serving
result: failed=false hanged=false err=executor is not serving
result: failed=false hanged=false err=executor is not serving
result: failed=false hanged=false err=executor is not serving
result: failed=false hanged=false err=executor is not serving
result: failed=false hanged=false err=executor is not serving
result: failed=false hanged=false err=executor is not serving
next prev parent reply other threads:[~2017-03-07 10:30 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-06 9:57 perf: use-after-free in perf_release Dmitry Vyukov
2017-03-06 12:13 ` Peter Zijlstra
2017-03-06 12:17 ` Dmitry Vyukov
2017-03-06 12:23 ` Peter Zijlstra
2017-03-06 12:27 ` Dmitry Vyukov
2017-03-06 12:47 ` Peter Zijlstra
2017-03-06 13:14 ` Peter Zijlstra
2017-03-06 13:34 ` Dmitry Vyukov
2017-03-07 9:08 ` Peter Zijlstra
2017-03-07 9:26 ` Dmitry Vyukov
2017-03-07 9:37 ` Peter Zijlstra [this message]
2017-03-07 9:43 ` Dmitry Vyukov
2017-03-07 10:00 ` Peter Zijlstra
2017-03-07 13:16 ` Peter Zijlstra
2017-03-07 13:27 ` Peter Zijlstra
2017-03-07 14:04 ` Oleg Nesterov
2017-03-07 14:17 ` Dmitry Vyukov
2017-03-07 16:51 ` Oleg Nesterov
2017-03-07 17:29 ` Peter Zijlstra
2017-03-14 12:55 ` Peter Zijlstra
2017-03-14 13:24 ` Oleg Nesterov
2017-03-14 13:47 ` Peter Zijlstra
2017-03-14 14:03 ` Oleg Nesterov
2017-03-14 14:07 ` Peter Zijlstra
2017-03-14 14:30 ` Oleg Nesterov
2017-03-14 15:02 ` Peter Zijlstra
2017-03-14 15:07 ` Peter Zijlstra
2017-03-14 15:37 ` Oleg Nesterov
2017-03-14 15:46 ` Peter Zijlstra
2017-03-14 15:19 ` Oleg Nesterov
2017-03-14 15:26 ` Peter Zijlstra
2017-03-14 15:59 ` Peter Zijlstra
2017-03-15 16:43 ` Oleg Nesterov
2017-03-16 12:05 ` Peter Zijlstra
2017-03-16 13:57 ` Peter Zijlstra
2017-03-16 16:41 ` Oleg Nesterov
2017-03-16 12:47 [PATCH 0/4] perf patches Peter Zijlstra
2017-03-16 12:47 ` [PATCH 1/4] perf: Fix use-after-free in perf_release() Peter Zijlstra
2017-03-16 15:19 ` [tip:perf/urgent] perf/core: " tip-bot for Peter Zijlstra
2017-03-16 12:47 ` [PATCH 2/4] perf: Fix event inheritance on fork() Peter Zijlstra
2017-03-16 15:19 ` [tip:perf/urgent] perf/core: " tip-bot for Peter Zijlstra
2017-03-16 12:47 ` [PATCH 3/4] perf: Simplify perf_event_free_task() Peter Zijlstra
2017-03-16 15:20 ` [tip:perf/urgent] perf/core: " tip-bot for Peter Zijlstra
2017-03-16 12:47 ` [PATCH 4/4] perf: Better explain the inherit magic Peter Zijlstra
2017-03-16 15:21 ` [tip:perf/urgent] perf/core: " tip-bot for Peter Zijlstra
2017-03-16 13:20 ` [PATCH 0/4] perf patches Ingo Molnar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170307093759.GU6500@twins.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=acme@kernel.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=dvyukov@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=mingo@redhat.com \
--cc=oleg@redhat.com \
--cc=syzkaller@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.