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

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: <20170306121314.GB6515@twins.programming.kicks-ass.net>
Date:   Mon, 6 Mar 2017 13:13:14 +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>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: perf: use-after-free in perf_release

On Mon, Mar 06, 2017 at 10:57:07AM +0100, Dmitry Vyukov wrote:
> Hello,
> 
> I've got the following use-after-free report while running syzkaller
> fuzzer on 86292b33d4b79ee03e2f43ea0381ef85f077c760. Note that the task
> is freed right in copy_process due to some error, but it's referenced
> by another thread in perf subsystem.

Weird... you don't happen to have a reproduction case available?