Re: kernel BUG in munlock_vma_pages_range

2014-03-21 Thread Vlastimil Babka
On 03/21/2014 02:53 AM, Sasha Levin wrote: On 12/13/2013 04:08 AM, Vlastimil Babka wrote: On 12/13/2013 09:49 AM, Bob Liu wrote: On 12/13/2013 05:05 AM, Sasha Levin wrote: On 12/12/2013 07:41 AM, Vlastimil Babka wrote: On 12/12/2013 06:03 AM, Bob Liu wrote: On 12/12/2013 11:16 AM, Sasha Lev

Re: kernel BUG in munlock_vma_pages_range

2014-03-20 Thread Sasha Levin
On 12/13/2013 04:08 AM, Vlastimil Babka wrote: On 12/13/2013 09:49 AM, Bob Liu wrote: On 12/13/2013 05:05 AM, Sasha Levin wrote: On 12/12/2013 07:41 AM, Vlastimil Babka wrote: On 12/12/2013 06:03 AM, Bob Liu wrote: On 12/12/2013 11:16 AM, Sasha Levin wrote: On 12/11/2013 05:59 PM, Vlastimil

Re: kernel BUG in munlock_vma_pages_range

2013-12-15 Thread Sasha Levin
On 12/13/2013 04:08 AM, Vlastimil Babka wrote: On 12/13/2013 09:49 AM, Bob Liu wrote: On 12/13/2013 05:05 AM, Sasha Levin wrote: On 12/12/2013 07:41 AM, Vlastimil Babka wrote: On 12/12/2013 06:03 AM, Bob Liu wrote: On 12/12/2013 11:16 AM, Sasha Levin wrote: On 12/11/2013 05:59 PM, Vlastimil

Re: kernel BUG in munlock_vma_pages_range

2013-12-13 Thread Vlastimil Babka
On 12/13/2013 09:49 AM, Bob Liu wrote: > On 12/13/2013 05:05 AM, Sasha Levin wrote: >> On 12/12/2013 07:41 AM, Vlastimil Babka wrote: >>> On 12/12/2013 06:03 AM, Bob Liu wrote: On 12/12/2013 11:16 AM, Sasha Levin wrote: > On 12/11/2013 05:59 PM, Vlastimil Babka wrote: >> On 12/09/

Re: kernel BUG in munlock_vma_pages_range

2013-12-13 Thread Bob Liu
On 12/13/2013 05:05 AM, Sasha Levin wrote: > On 12/12/2013 07:41 AM, Vlastimil Babka wrote: >> On 12/12/2013 06:03 AM, Bob Liu wrote: >>> >>> On 12/12/2013 11:16 AM, Sasha Levin wrote: On 12/11/2013 05:59 PM, Vlastimil Babka wrote: > On 12/09/2013 09:26 PM, Sasha Levin wrote: >> On 12/

Re: kernel BUG in munlock_vma_pages_range

2013-12-12 Thread Sasha Levin
On 12/12/2013 07:41 AM, Vlastimil Babka wrote: On 12/12/2013 06:03 AM, Bob Liu wrote: On 12/12/2013 11:16 AM, Sasha Levin wrote: On 12/11/2013 05:59 PM, Vlastimil Babka wrote: On 12/09/2013 09:26 PM, Sasha Levin wrote: On 12/09/2013 12:12 PM, Vlastimil Babka wrote: On 12/09/2013 06:05 PM, S

Re: kernel BUG in munlock_vma_pages_range

2013-12-12 Thread Vlastimil Babka
On 12/12/2013 06:03 AM, Bob Liu wrote: > > On 12/12/2013 11:16 AM, Sasha Levin wrote: >> On 12/11/2013 05:59 PM, Vlastimil Babka wrote: >>> On 12/09/2013 09:26 PM, Sasha Levin wrote: On 12/09/2013 12:12 PM, Vlastimil Babka wrote: > On 12/09/2013 06:05 PM, Sasha Levin wrote: >> On 12/0

Re: kernel BUG in munlock_vma_pages_range

2013-12-11 Thread Bob Liu
On 12/12/2013 11:16 AM, Sasha Levin wrote: > On 12/11/2013 05:59 PM, Vlastimil Babka wrote: >> On 12/09/2013 09:26 PM, Sasha Levin wrote: >>> On 12/09/2013 12:12 PM, Vlastimil Babka wrote: On 12/09/2013 06:05 PM, Sasha Levin wrote: > On 12/09/2013 04:34 AM, Vlastimil Babka wrote: >> H

Re: kernel BUG in munlock_vma_pages_range

2013-12-11 Thread Sasha Levin
On 12/11/2013 05:59 PM, Vlastimil Babka wrote: On 12/09/2013 09:26 PM, Sasha Levin wrote: On 12/09/2013 12:12 PM, Vlastimil Babka wrote: On 12/09/2013 06:05 PM, Sasha Levin wrote: On 12/09/2013 04:34 AM, Vlastimil Babka wrote: Hello, I will look at it, thanks. Do you have specific reproductio

Re: kernel BUG in munlock_vma_pages_range

2013-12-11 Thread Vlastimil Babka
On 12/09/2013 09:26 PM, Sasha Levin wrote: > On 12/09/2013 12:12 PM, Vlastimil Babka wrote: >> On 12/09/2013 06:05 PM, Sasha Levin wrote: >>> On 12/09/2013 04:34 AM, Vlastimil Babka wrote: Hello, I will look at it, thanks. Do you have specific reproduction instructions? >>> >>> Not really

Re: kernel BUG in munlock_vma_pages_range

2013-12-11 Thread Sasha Levin
On 12/09/2013 04:16 PM, Jiri Kosina wrote: On Mon, 9 Dec 2013, Sasha Levin wrote: Not really, the fuzzer hit it once and I've been unable to trigger it again. If you are ever able to trigger it again, I think having crashdump available would be very helpful here, to see how exactly does the V

Re: kernel BUG in munlock_vma_pages_range

2013-12-09 Thread Jiri Kosina
On Mon, 9 Dec 2013, Sasha Levin wrote: > Not really, the fuzzer hit it once and I've been unable to trigger it > again. If you are ever able to trigger it again, I think having crashdump available would be very helpful here, to see how exactly does the VMA/THP layout look like at the time of

Re: kernel BUG in munlock_vma_pages_range

2013-12-09 Thread Sasha Levin
On 12/09/2013 12:12 PM, Vlastimil Babka wrote: On 12/09/2013 06:05 PM, Sasha Levin wrote: On 12/09/2013 04:34 AM, Vlastimil Babka wrote: Hello, I will look at it, thanks. Do you have specific reproduction instructions? Not really, the fuzzer hit it once and I've been unable to trigger it agai

Re: kernel BUG in munlock_vma_pages_range

2013-12-09 Thread Vlastimil Babka
On 12/09/2013 06:05 PM, Sasha Levin wrote: On 12/09/2013 04:34 AM, Vlastimil Babka wrote: Hello, I will look at it, thanks. Do you have specific reproduction instructions? Not really, the fuzzer hit it once and I've been unable to trigger it again. Looking at the piece of code involved it mig

Re: kernel BUG in munlock_vma_pages_range

2013-12-09 Thread Sasha Levin
On 12/09/2013 04:34 AM, Vlastimil Babka wrote: Hello, I will look at it, thanks. Do you have specific reproduction instructions? Not really, the fuzzer hit it once and I've been unable to trigger it again. Looking at the piece of code involved it might have had something to do with hugetlbfs,

Re: kernel BUG in munlock_vma_pages_range

2013-12-09 Thread Vlastimil Babka
On 12/08/2013 02:52 AM, Sasha Levin wrote: Hi all, While fuzzing with trinity inside a KVM tools guest running latest -next kernel, I've stumbled on the following spew. The code seems to be in munlock_vma_pages_range(): page = follow_page_mask(vma, start, FOLL_GET | FOLL_DUMP,

kernel BUG in munlock_vma_pages_range

2013-12-07 Thread Sasha Levin
Hi all, While fuzzing with trinity inside a KVM tools guest running latest -next kernel, I've stumbled on the following spew. The code seems to be in munlock_vma_pages_range(): page = follow_page_mask(vma, start, FOLL_GET | FOLL_DUMP, &page_mask); if (pa