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  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]
Date:   Tue, 24 Jan 2017 14:17:48 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: perf: use-after-free in perf_event_for_each

On Mon, Jan 23, 2017 at 06:04:42PM +0100, Peter Zijlstra wrote:
> On Mon, Jan 23, 2017 at 02:30:12PM +0100, Dmitry Vyukov wrote:
> > Hello,
> > 
> > The following program triggers use-after-free in perf_event_for_each:
> > https://gist.githubusercontent.com/dvyukov/f1c354a8356e42f4d0b3d912e1bec956/raw/31d7ecdf6dc2c7327b80ef8581a39c823bbe405d/gistfile1.txt

I've been running 60 concurrent instances of that thing for hours now,
and have not been able to reproduce :-/

I did enable CONFIG_KASAN but otherwise booted as normal, and the thing
says:

[    0.000000] kasan: KernelAddressSanitizer initialized

Is there anything else I should do?

I've ran out of ideas and it would be very helpful if I could prod at
something that fails...

Powered by blists - more mailing lists