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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1953366
and then change the status of the bug to 'Confirmed'.
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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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 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.
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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