linux-kernel - Re: System crash with 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: <alpine.DEB.2.21.1902011125290.25915@macbook-air>
Date:   Fri, 1 Feb 2019 11:27:28 -0500 (EST)
From:   Vince Weaver <vincent.weaver@...ne.edu>
To:     Jiri Olsa <jolsa@...hat.com>
cc:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-perf-users@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>, eranian@...gle.com,
        vincent.weaver@...ne.edu,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Subject: Re: System crash with perf_fuzzer (kernel: 5.0.0-rc3)

On Fri, 1 Feb 2019, Jiri Olsa wrote:

> with attached patch I did not trigger the fuzzer crash
> for over a day now, could you guys try?

I've just started fuzzing with the patch applied.  Often it takes a few 
hours to trigger the bug.

Added question about this bug.  It appeared that the crash was triggered 
by the BTS driver over-writing kernel memory.  The data being written, was 
this user controllable?  Meaning, is this a security issue being fixed, or 
just a crashing issue?

Vince Weaver
vincent.weaver@...ne.edu