Re: System crash with perf_fuzzer (kernel: 5.0.0-rc3)

[Jiri Olsa]

On Fri, Feb 01, 2019 at 11:27:28AM -0500, Vince Weaver wrote:
> 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.

cool, thanks

> 
> 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?

yea, I have an example that can trigger it immediately

jirka