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 might have had something to do with hugetlbfs, so I'll crank
up testing on that part.
Thanks. Do you have trinity log and the .config file? I'm currently
unable to even boot linux-next with my config/setup due to a GPF.
Looking at code I wouldn't expect that it could encounter a tail page,
without first encountering a head page and skipping the whole huge page.
At least in THP case, as TLB pages should be split when a vma is split.
As for hugetlbfs, it should be skipped for mlock/munlock operations
completely. One of these assumptions is probably failing here...
Vlastimil
Thanks,
Sasha
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