linux-kernel - Re: use-after-free in __perf_install_in

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CACT4Y+ata7YONZpKKkAKJLeUhr8=oG-6N+TzKW0OSm+AM0QyPg@mail.gmail.com>
Date:	Thu, 31 Dec 2015 18:15:41 +0100
From:	Dmitry Vyukov <dvyukov@...gle.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	syzkaller <syzkaller@...glegroups.com>,
	Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>
Subject: Re: use-after-free in __perf_install_in_context

On Thu, Dec 17, 2015 at 3:43 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> On Thu, Dec 17, 2015 at 03:35:32PM +0100, Dmitry Vyukov wrote:
>> In short, I did not see use-after-frees but perf_event_open fuzzing
>> started hanging VMs very frequently, so testing is inconclusive.
>
> Right, I'll get back to staring at that one.
>
> Running your test case on bare metal got my machine reproducably stuck
> but in a different place than you've reported.
>
> Takes a while too, so far no luck in explaining/debugging it. All my
> added debug code remains silent :/
>
> I'll go think up more ..

Hi Peter,

Any progress with this?
I can't continue to test perf subsytem, as it reliably hangs my machines.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/