Messages in this thread | | | Date | Wed, 18 Mar 2015 15:28:02 -0700 | Subject | Re: PANIC: double fault, error_code: 0x0 in 4.0.0-rc3-2, kvm related? | From | Linus Torvalds <> |
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On Wed, Mar 18, 2015 at 3:22 PM, Jiri Kosina <jkosina@suse.cz> wrote: > > But what if the GPF handler pagefaults afterwards? It'd be operating on > user stack already.
So I think this might be the answer. We don't see the GP fault, because we don't have a backtrace, because that backtrace is on the user stack (which is why the stack trace dumping fails - we should probably fix that, btw - the second oops is just confusing and not helpful).
Is the intel check for canonical address (that __VIRTUAL_MASK_SHIFT thing) perhaps wrong or not as strict as Intel CPU's do? We'd never notice in normal situations..
Linus
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