** Also affects: ubuntu-kernel-tests
Importance: Undecided
Status: New
** Tags added: sru-20211129
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https://bugs.launchpad.net/bugs/1953366
Title:
spectre_v2 from ubuntu_kernel_selftests ADT test failure with
5.13/5.11 ppc64el
Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
This is a scripted bug report about ADT failures while running linux
tests for linux/5.13.0-23.23 on impish. Whether this is caused by the
dep8 tests of the tested source or the kernel has yet to be
determined.
This test was previously being skipped. After recent test changes,
it's now showing up as a failure. Not a regression.
ubuntu_kernel_selftests.powerpc/security:spectre_v2 consistently
failing on 5.13 and 5.11
Found failing on:
Impish/linux 5.13.0-23.23
Hirsute/linux 5.11.0-42.46 (passed on first run, though failing after
retrigger)
Foal/hwe-5.13 5.13.0-23.23~20.04.1
Focal/hwe-5.11 5.11.0-42.46~20.04.1
23:45:31 DEBUG| [stdout] # selftests: powerpc/security: spectre_v2
23:45:31 DEBUG| [stdout] # test: spectre_v2
23:45:31 DEBUG| [stdout] # tags: git_version:d9c024c2-dirty
23:45:50 DEBUG| [stdout] # sysfs reports: 'Mitigation: Software count cache
flush, Software link stack flush'
23:45:50 DEBUG| [stdout] # PM_BR_PRED_CCACHE: result 2147483649
running/enabled 19680067308
23:45:50 DEBUG| [stdout] # PM_BR_MPRED_CCACHE: result 2147475077
running/enabled 19680064034
23:45:50 DEBUG| [stdout] # PM_BR_PRED_PCACHE: result 0
running/enabled 19680062840
23:45:50 DEBUG| [stdout] # PM_BR_MPRED_PCACHE: result 0
running/enabled 19680061722
23:45:50 DEBUG| [stdout] # Miss percent 99 %
23:45:50 DEBUG| [stdout] # Branch misses > 15% unexpected in this
configuration!
23:45:50 DEBUG| [stdout] # Possible mis-match between reported & actual
mitigation
23:45:50 DEBUG| [stdout] # failure: spectre_v2
23:45:50 DEBUG| [stdout] not ok 1 selftests: powerpc/security: spectre_v2 #
exit=1
23:45:50 DEBUG| [stdout] make: Leaving directory
'/tmp/autopkgtest.XkeXuO/build.i7C/src/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/powerpc/security'
Testing failed on:
ppc64el:
https://autopkgtest.ubuntu.com/results/autopkgtest-impish/impish/ppc64el/l/linux/20211204_000820_141a2@/log.gz
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