[Linux-kselftest-mirror] selftests: x86_64: kselftest mpx-mini-test_64 - no MPX support - failed - 3869 Aborted (core dumped)

[greg at kroah.com (Greg KH)]

On Fri, Nov 24, 2017 at 04:52:22PM +0530, Naresh Kamboju wrote:
> On 24 November 2017 at 16:42, Greg KH <greg at kroah.com> wrote:
> > On Fri, Nov 24, 2017 at 12:11:41PM +0100, Greg KH wrote:
> >> On Fri, Nov 24, 2017 at 04:32:42PM +0530, Naresh Kamboju wrote:
> >> > Hi,
> >> >
> >> > We have found "no MPX support" bug while running kselftests on
> >> > SuperServer 5019S-ML - x86_64 device.
> >> > Please provide your comments to fix this bug.
> >> >
> >> > LKFT: 4.4-rc 4.9-rc 4.13-rc 4.14-rc: x86: kselftest mpx-mini-test_64 -
> >> > no MPX support - failed - 3869 Aborted (core dumped) (edit)
> >> > https://bugs.linaro.org/show_bug.cgi?id=3497
> >> >
> >> > NOTE:
> >> > Please add your self to Bugzilla to add comments.
> >>
> >> Ugh, what?  Why not discuss it here, and provide the full log of what is
> >> happening and what you think should be done to fix it.  Don't bury stuff
> >> in some random bugzilla...
> >>
> >> Perhaps a simple abort once you determine that MPX is not supported?
> >
> > Wait, that is what the test is doing, so it's working properly.  Why is
> > this an issue?
> 
> seems to be that the hardware change in LAB brought up this failures
> Here you could notice difference in test out on old and new machines.
> 
> old machine:
> ------------
> processor lacks XSAVE, can not run MPX tests
> selftests: mpx-mini-test_64 [PASS]
> 
> New machine:
> -------------
> XSAVE is supported by HW & OS
> XSAVE processor supported state mask: 0x1f
> XSAVE OS supported state mask: 0x1f
>  BNDREGS: size: 64 user: 1 supervisor: 0 aligned: 0
>   BNDCSR: size: 64 user: 1 supervisor: 0 aligned: 0
> no MPX support
> ./run_kselftest.sh: line 214:  3869 Aborted (core dumped) ./mpx-mini-test_64
> selftests: mpx-mini-test_64 [FAIL]

Yes, the tests runs differently on different hardware.

So abort() should not happen if there is no MPX support, care to make up
a patch and test it on your system?

thanks,

greg k-h
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