Hi all

0Day noticed that kernel_selftests.x86.mpx-mini-test_32.fail at recent upstream kernel a. v4.11 Good b. v4.12 and later: Bad

And the 64bit application kernel_selftests.x86.mpx-mini-test_64 is always good.

0Day robot tried to bisect the FBC, but it failed at last. But anyway i want to let you know we had this issue.

below is the testing log at v4.12 ----------------------- 2018-03-02 23:12:08 make run_tests -C x86 make: Entering directory '/usr/src/linux-selftests-x86_64-rhel-7.2_mpx-6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c/tools/testing/selftests/x86' #BR status == 2, missing bounds table,kernel should have handled!! XSAVE is supported by HW & OS XSAVE processor supported state mask: 0x2ff XSAVE OS supported state mask: 0x2ff BNDREGS: size: 64 user: 1 supervisor: 0 aligned: 0 BNDCSR: size: 64 user: 1 supervisor: 0 aligned: 0 executing unmaptest mpx dig ( 1) complete, SUCCESS ( 0 / 0) selftests: mpx-mini-test_32 [FAIL] -----------------------

0Day Environment OS: Debian 9 kernel: v4.12 model: Skylake nr_cpu: 104 memory: 64G brand: Intel(R) Xeon(R) Platinum 8170 CPU @ 2.10GHz

------------------------- as a comparison, paste the log at v4.11 as following XSAVE is supported by HW & OS XSAVE processor supported state mask: 0x2ff XSAVE OS supported state mask: 0x2ff BNDREGS: size: 64 user: 1 supervisor: 0 aligned: 0 BNDCSR: size: 64 user: 1 supervisor: 0 aligned: 0 executing unmaptest mpx dig ( 1) complete, SUCCESS ( 0 / 0) iteration 1 complete, OK so far mpx dig ( 2) complete, SUCCESS ( 8836 / 5554) mpx dig ( 3) complete, SUCCESS ( 2761 / 1760) mpx dig ( 4) complete, SUCCESS ( 4494 / 2828) mpx dig ( 5) complete, SUCCESS ( 531 / 337) mpx dig ( 6) complete, SUCCESS ( 145 / 92) mpx dig ( 7) complete, SUCCESS ( 0 / 0) mpx dig ( 8) complete, SUCCESS ( 0 / 0) mpx dig ( 9) complete, SUCCESS ( 0 / 0) mpx dig ( 10) complete, SUCCESS ( 0 / 0) mpx dig ( 11) complete, SUCCESS ( 0 / 0) mpx dig ( 12) complete, SUCCESS ( 0 / 0) mpx dig ( 13) complete, SUCCESS ( 0 / 0) mpx dig ( 14) complete, SUCCESS ( 0 / 0) mpx dig ( 15) complete, SUCCESS ( 0 / 0) mpx dig ( 16) complete, SUCCESS ( 0 / 0) iteration 1566 complete, OK so far mpx dig ( 17) complete, SUCCESS ( 0 / 0) mpx dig ( 18) complete, SUCCESS ( 0 / 0) mpx dig ( 19) complete, SUCCESS ( 0 / 0) mpx dig ( 20) complete, SUCCESS ( 0 / 0) mpx dig ( 21) complete, SUCCESS ( 0 / 0) mpx dig ( 22) complete, SUCCESS ( 0 / 0) mpx dig ( 23) complete, SUCCESS ( 0 / 0) mpx dig ( 24) complete, SUCCESS ( 0 / 0) mpx dig ( 25) complete, SUCCESS ( 0 / 0) mpx dig ( 26) complete, SUCCESS ( 0 / 0) mpx dig ( 27) complete, SUCCESS ( 0 / 0) mpx dig ( 28) complete, SUCCESS ( 0 / 0) mpx dig ( 29) complete, SUCCESS ( 0 / 0) mpx dig ( 30) complete, SUCCESS ( 0 / 0) mpx dig ( 31) complete, SUCCESS ( 0 / 0) mpx dig ( 32) complete, SUCCESS ( 0 / 0) mpx dig ( 33) complete, SUCCESS ( 0 / 0) mpx dig ( 34) complete, SUCCESS ( 0 / 0) mpx dig ( 35) complete, SUCCESS ( 0 / 0) mpx dig ( 36) complete, SUCCESS ( 0 / 0) mpx dig ( 37) complete, SUCCESS ( 0 / 0) mpx dig ( 38) complete, SUCCESS ( 0 / 0) mpx dig ( 39) complete, SUCCESS ( 0 / 0) mpx dig ( 40) complete, SUCCESS ( 0 / 0) iteration 3325 complete, OK so far done with malloc() fun starting mpx bounds table test iteration 4574 complete, OK so far iteration 9157 complete, OK so far done with mpx bounds table test ./mpx-mini-test_32 completed successfully selftests: mpx-mini-test_32 [PASS]

Thanks

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