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Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at arch/x86/mm/extable.c:50 ex_handler_rdmsr_unsafe

From Borislav Petkov <bp@alien8.de>
Newsgroups linux.kernel
Subject Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at arch/x86/mm/extable.c:50 ex_handler_rdmsr_unsafe
Date 2016-06-15 20:10 +0200
Message-ID <rKnqi-5W3-19@gated-at.bofh.it> (permalink)
References <rKjZo-3Eh-29@gated-at.bofh.it> <rKjZo-3Eh-27@gated-at.bofh.it> <rKmXf-5xA-11@gated-at.bofh.it> <rKngC-5DP-7@gated-at.bofh.it> <rKngC-5DP-5@gated-at.bofh.it>
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On Wed, Jun 15, 2016 at 10:55:34AM -0700, Andy Lutomirski wrote:
> Isn't it this one?

Yes, it is.

> I'm not.  If %pF points at some silly helper, we still want the frames below it.

Why silly helper? It points to the rIP where the *MSR instruction is.
Can't get more precise than that.

And yes, %pF is better:

[    0.030879] unchecked MSR access error: RDMSR from 0x1b0 at rIP: 0xffffffff81026d9f (init_intel_energy_perf.part.3+0xf/0xd0)

Ok, I'll send a patch.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.

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Re: [x86] 5ac0c41bf3:  WARNING: CPU: 0 PID: 0 at  arch/x86/mm/extable.c:50 ex_handler_rdmsr_unsafe Borislav Petkov <bp@alien8.de> - 2016-06-15 16:30 +0200
  Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at  arch/x86/mm/extable.c:50 ex_handler_rdmsr_unsafe Paolo Bonzini <pbonzini@redhat.com> - 2016-06-15 17:00 +0200
  Re: [x86] 5ac0c41bf3:  WARNING: CPU: 0 PID: 0 at  arch/x86/mm/extable.c:50 ex_handler_rdmsr_unsafe Eduardo Habkost <ehabkost@redhat.com> - 2016-06-15 17:00 +0200
    Re: [x86] 5ac0c41bf3:  WARNING: CPU: 0 PID: 0 at  arch/x86/mm/extable.c:50 ex_handler_rdmsr_unsafe Borislav Petkov <bp@alien8.de> - 2016-06-15 19:10 +0200
  Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at arch/x86/mm/extable.c:50  ex_handler_rdmsr_unsafe Andy Lutomirski <luto@amacapital.net> - 2016-06-15 19:40 +0200
    Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at arch/x86/mm/extable.c:50  ex_handler_rdmsr_unsafe Andy Lutomirski <luto@amacapital.net> - 2016-06-15 20:00 +0200
      Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at  arch/x86/mm/extable.c:50 ex_handler_rdmsr_unsafe Borislav Petkov <bp@alien8.de> - 2016-06-15 20:10 +0200
        Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at arch/x86/mm/extable.c:50  ex_handler_rdmsr_unsafe Andy Lutomirski <luto@amacapital.net> - 2016-06-15 20:20 +0200
          Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at  arch/x86/mm/extable.c:50 ex_handler_rdmsr_unsafe Borislav Petkov <bp@alien8.de> - 2016-06-15 20:30 +0200
            Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at arch/x86/mm/extable.c:50  ex_handler_rdmsr_unsafe Andy Lutomirski <luto@amacapital.net> - 2016-06-15 20:50 +0200
    Re: [x86] 5ac0c41bf3: WARNING: CPU: 0 PID: 0 at  arch/x86/mm/extable.c:50 ex_handler_rdmsr_unsafe Borislav Petkov <bp@alien8.de> - 2016-06-15 20:00 +0200

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