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Groups > linux.kernel > #1522351
| From | Nadav Amit <nadav.amit@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: kvm: WARNING in em_jmp_far |
| Date | 2016-11-15 06:40 +0100 |
| Message-ID | <sDEDn-I6-3@gated-at.bofh.it> (permalink) |
| References | <sDEal-vS-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
> On Nov 14, 2016, at 9:06 PM, Dmitry Vyukov <dvyukov@google.com> wrote: > > Hello, > > The following program triggers WARNING in em_jmp_far: > https://gist.githubusercontent.com/dvyukov/16bfd3d68fa7d5461101ef74e07796e4/raw/e6d663980681f2c5838ff6cd361cede7d3204838/gistfile1.txt > > > WARNING: CPU: 1 PID: 15748 at arch/x86/kvm/emulate.c:2128 em_jmp_far+0x4a7/0x530 I don’t know how to “read” the test, but it seems that this warning can be triggered if CS base/limit cause a #GP exception when EIP is loaded. I think it safe to remove this warning (which I introduced) as well as the redundant “return rc” that follows it. The code should handle the emulation correctly regardless of the warning. Regards, Nadav
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kvm: WARNING in em_jmp_far Dmitry Vyukov <dvyukov@google.com> - 2016-11-15 06:10 +0100
Re: kvm: WARNING in em_jmp_far Nadav Amit <nadav.amit@gmail.com> - 2016-11-15 06:40 +0100
Re: kvm: WARNING in em_jmp_far Dmitry Vyukov <dvyukov@google.com> - 2016-11-15 06:40 +0100
Re: kvm: WARNING in em_jmp_far Nadav Amit <nadav.amit@gmail.com> - 2016-11-15 06:40 +0100
Re: kvm: WARNING in em_jmp_far Paolo Bonzini <pbonzini@redhat.com> - 2016-11-15 11:50 +0100
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