Re: eventpoll __list_del_entry corruption

2014-06-16 Thread Eric Wong
Sasha Levin wrote: > On 05/15/2014 02:11 PM, Peter Zijlstra wrote: > > On Mon, May 12, 2014 at 11:42:33AM -0400, Sasha Levin wrote: > >> Hi all, > >> > >> While fuzzing with trinity inside a KVM tools guest running the latest > >> -next > >> kernel I've stumbled on the following spew. Maybe

Re: eventpoll __list_del_entry corruption

2014-06-16 Thread Eric Wong
Sasha Levin sasha.le...@oracle.com wrote: On 05/15/2014 02:11 PM, Peter Zijlstra wrote: On Mon, May 12, 2014 at 11:42:33AM -0400, Sasha Levin wrote: Hi all, While fuzzing with trinity inside a KVM tools guest running the latest -next kernel I've stumbled on the following spew. Maybe

Re: eventpoll __list_del_entry corruption

2014-06-03 Thread Peter Zijlstra
On Tue, Jun 03, 2014 at 11:07:11AM -0400, Jason Baron wrote: > Hi Peter, > > If its possible to reproduce maybe we can apply the following debug I think I saw it twice during a week of fuzzing, so it might be a while, esp. since I'm now not actively fuzzing anymore, but I can sure stuff this in

Re: eventpoll __list_del_entry corruption

2014-06-03 Thread Jason Baron
On 05/15/2014 02:11 PM, Peter Zijlstra wrote: > On Mon, May 12, 2014 at 11:42:33AM -0400, Sasha Levin wrote: >> Hi all, >> >> While fuzzing with trinity inside a KVM tools guest running the latest -next >> kernel I've stumbled on the following spew. Maybe related to the very recent >> change in

Re: eventpoll __list_del_entry corruption

2014-06-03 Thread Jason Baron
On 05/15/2014 02:11 PM, Peter Zijlstra wrote: On Mon, May 12, 2014 at 11:42:33AM -0400, Sasha Levin wrote: Hi all, While fuzzing with trinity inside a KVM tools guest running the latest -next kernel I've stumbled on the following spew. Maybe related to the very recent change in freeing on

Re: eventpoll __list_del_entry corruption

2014-06-03 Thread Peter Zijlstra
On Tue, Jun 03, 2014 at 11:07:11AM -0400, Jason Baron wrote: Hi Peter, If its possible to reproduce maybe we can apply the following debug I think I saw it twice during a week of fuzzing, so it might be a while, esp. since I'm now not actively fuzzing anymore, but I can sure stuff this in my

Re: eventpoll __list_del_entry corruption

2014-05-15 Thread Sasha Levin
On 05/15/2014 02:11 PM, Peter Zijlstra wrote: > On Mon, May 12, 2014 at 11:42:33AM -0400, Sasha Levin wrote: >> Hi all, >> >> While fuzzing with trinity inside a KVM tools guest running the latest -next >> kernel I've stumbled on the following spew. Maybe related to the very recent >> change in

eventpoll __list_del_entry corruption (was: perf: use after free in perf_remove_from_context)

2014-05-15 Thread Peter Zijlstra
On Mon, May 12, 2014 at 11:42:33AM -0400, Sasha Levin wrote: > Hi all, > > While fuzzing with trinity inside a KVM tools guest running the latest -next > kernel I've stumbled on the following spew. Maybe related to the very recent > change in freeing on task exit? > While fuzzing to reproduce;

eventpoll __list_del_entry corruption (was: perf: use after free in perf_remove_from_context)

2014-05-15 Thread Peter Zijlstra
On Mon, May 12, 2014 at 11:42:33AM -0400, Sasha Levin wrote: Hi all, While fuzzing with trinity inside a KVM tools guest running the latest -next kernel I've stumbled on the following spew. Maybe related to the very recent change in freeing on task exit? While fuzzing to reproduce; I hit

Re: eventpoll __list_del_entry corruption

2014-05-15 Thread Sasha Levin
On 05/15/2014 02:11 PM, Peter Zijlstra wrote: On Mon, May 12, 2014 at 11:42:33AM -0400, Sasha Levin wrote: Hi all, While fuzzing with trinity inside a KVM tools guest running the latest -next kernel I've stumbled on the following spew. Maybe related to the very recent change in freeing on