Messages in this thread | | | From | Vince Weaver <> | Date | Thu, 4 Apr 2019 12:37:18 -0400 (EDT) | Subject | Re: perf: perf_fuzzer crashes on Pentium 4 systems |
| |
On Thu, 4 Apr 2019, Cyrill Gorcunov wrote:
> On Thu, Apr 04, 2019 at 09:25:47AM -0400, Vince Weaver wrote: > > > > It looks like there are at least two bugs here, one that's a full > > hardlockup with nothing on serial console. The other is the NULL > > dereference.
OK, it turns out the hard-lock and the null pointer dereference might be the same, I have a random seed for the fuzzer from a hard-lock crash that reproduces and it generated the null pointer crash. (This is with your patch applied).
I can try to see if I can bisect down to a specific event sequence that triggers this, but that can be tricky sometimes if things lock up so fast that the event log doesn't get written out before the crash.
Vince
| |