Messages in this thread | | | Date | Tue, 05 Apr 2005 23:41:53 +0400 | From | Stas Sergeev <> | Subject | Re: crash in entry.S restore_all, 2.6.12-rc2, x86, PAGEALLOC |
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Hi Linus,
Linus Torvalds wrote: > This one can pass through vm86 mode stuff without the high-16-bit fixup, > as far as I can tell. Yes, but according to Petr, vm86 is not affected by the bug at all. I did some rough tests in the past that seem to confirm that. Also, in any case, the dependance of vm86 code on the higher word of %esp would be very, very obscure.
> So I'd actually prefer to get that mystery explained.. IIRC if the interrupt doesn't do the CPL switch, the interrupt gate doesn't save the stack, and so there may not be the full "struct pt_regs" when the kernel thread is interrupted. Does this sound any realistic?
So while it would be excellent to hear that my patch was not guilty at all, I think it is not the case.
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