ftrace from ubuntu_kernel_selftests failed with "test for function event triggers" on F/G/H/I

[Kelsey Steele]

ftrace from ubuntu_kernel_selftests failed with "test for function event triggers" on Groovy riscv 5.8.0-21.23

This test was recently added, not considering a regression

Log is getting cut off from regression test report. the below is all that could be retrieved at the moment:

04/13 23:48:00 DEBUG| utils:0116| Running 'sudo sh -c 'echo 1 > /proc/sys/net/ipv4/conf/all/accept_local''
04/13 23:48:00 DEBUG| utils:0116| Running 'sudo make -C linux/tools/testing/selftests TARGETS=ftrace run_tests'
04/13 23:48:00 DEBUG| utils:0153| [stdout] make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'
04/13 23:48:01 DEBUG| utils:0153| [stdout] make --no-builtin-rules ARCH=riscv -C ../../.. headers_install
04/13 23:48:01 DEBUG| utils:0153| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
04/13 23:48:14 DEBUG| utils:0153| [stdout] INSTALL ./usr/include
04/13 23:48:15 DEBUG| utils:0153| [stdout] make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
04/13 23:48:15 DEBUG| utils:0153| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
04/13 23:48:15 DEBUG| utils:0153| [stdout] make[1]: Nothing to be done for 'all'.
04/13 23:48:15 DEBUG| utils:0153| [stdout] make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
04/13 23:48:16 DEBUG| utils:0153| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
04/13 23:48:16 DEBUG| utils:0153| [stdout] TAP version 13
04/13 23:48:16 DEBUG| utils:0153| [stdout] 1..1
04/13 23:48:16 DEBUG| utils:0153| [stdout] # selftests: ftrace: ftracetest
04/13 23:48:16 ERROR| utils:0153| [stderr] perl: warning: Setting locale failed.
04/13 23:48:16 ERROR| utils:0153| [stderr] perl: warning: Please check that your locale settings:
04/13 23:48:16 ERROR| utils:0153| [stderr] LANGUAGE = (unset),
04/13 23:48:16 ERROR| utils:0153| [stderr] LC_ALL = (unset),
04/13 23:48:16 ERROR| utils:0153| [stderr] LC_CTYPE = "C.UTF-8",
04/13 23:48:16 ERROR| utils:0153| [stderr] LANG = "en_US.UTF-8"
04/13 23:48:16 ERROR| utils:0153| [stderr] are supported and installed on your system.
04/13 23:48:16 ERROR| utils:0153| [stderr] perl: warning: Falling back to the standard locale ("C").
04/13 23:48:17 DEBUG| utils:0153| [stdout] # === Ftrace unit tests ===
04/13 23:48:21 DEBUG| utils:0153| [stdout] # [1] Basic trace file check [PASS]
04/13 23:49:02 DEBUG| utils:0153| [stdout] # [2] Basic test for tracers [PASS]
04/13 23:49:09 DEBUG| utils:0153| [stdout] # [3] Basic trace clock test [PASS]
04/13 23:49:13 DEBUG| utils:0153| [stdout] # [4] Basic event tracing check [PASS]
04/13 23:49:18 DEBUG| utils:0153| [stdout] # [5] Change the ringbuffer size [PASS]
04/13 23:49:23 DEBUG| utils:0153| [stdout] # [6] Snapshot and tracing setting [PASS]
04/13 23:49:27 DEBUG| utils:0153| [stdout] # [7] trace_pipe and trace_marker [PASS]
04/13 23:49:32 DEBUG| utils:0153| [stdout] # [8] Test ftrace direct functions against tracers [UNRESOLVED]
04/13 23:49:33 DEBUG| utils:0153| [stdout] # [9] Test ftrace direct functions against kprobes [UNSUPPORTED]
04/13 23:49:37 DEBUG| utils:0153| [stdout] # [10] Generic dynamic event - add/remove kprobe events [FAIL]
04/13 23:49:37 DEBUG| utils:0153| [stdout] # [11] Generic dynamic event - add/remove synthetic events [UNSUPPORTED]
04/13 23:49:38 DEBUG| utils:0153| [stdout] # [12] Generic dynamic event - selective clear (compatibility) [UNSUPPORTED]
04/13 23:49:39 DEBUG| utils:0153| [stdout] # [13] Generic dynamic event - generic clear event [UNSUPPORTED]
04/13 23:49:44 DEBUG| utils:0153| [stdout] # [14] event tracing - enable/disable with event level files [PASS]
04/13 23:49:50 DEBUG| utils:0153| [stdout] # [15] event tracing - restricts events based on pid notrace filtering [PASS]
04/13 23:49:56 DEBUG| utils:0153| [stdout] # [16] event tracing - restricts events based on pid [PASS]
04/13 23:50:01 DEBUG| utils:0153| [stdout] # [17] event tracing - enable/disable with subsystem level files [PASS]
04/13 23:50:06 DEBUG| utils:0153| [stdout] # [18] event tracing - enable/disable with top level files [PASS]
04/13 23:50:12 DEBUG| utils:0153| [stdout] # [19] Test trace_printk from module [PASS]
04/13 23:50:30 DEBUG| utils:0153| [stdout] # [20] ftrace - function graph filters with stack tracer [PASS]
04/13 23:50:37 DEBUG| utils:0153| [stdout] # [21] ftrace - function graph filters [PASS]
04/13 23:50:46 DEBUG| utils:0153| [stdout] # [22] ftrace - function pid notrace filters [PASS]
04/13 23:50:55 DEBUG| utils:0153| [stdout] # [23] ftrace - function pid filters [PASS]
04/13 23:51:02 DEBUG| utils:0153| [stdout] # [24] ftrace - stacktrace filter command [PASS]
04/13 23:51:12 DEBUG| utils:0153| [stdout] # [25] ftrace - function trace with cpumask [PASS]
04/13 23:51:26 DEBUG| utils:0153| [stdout] # [26] ftrace - test for function event triggers [FAIL]
04/13 23:51:35 DEBUG| utils:0153| [stdout] # [27] ftrace - function trace on module [PASS]

The second failure "Generic dynamic event - add/remove kprobe events" is reported at:
https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1923682

[Kelsey Steele (kelsey-steele)]

found on focal 5.4.0-73.82 s390x host s2lp4

[Guilherme G. Piccoli (gpiccoli)]

Observed on G/kvm , cycle sru-20210510 .

[Guilherme G. Piccoli (gpiccoli)]

Observed on H/kvm , cycle sru-20210510 .

[Guilherme G. Piccoli (gpiccoli)]

Observed on G/RISC-V , cycle sru-20210510 .

[Guilherme G. Piccoli (gpiccoli)]

I suggest we mark this one as duplicate of LP #1923682 or vice-versa.

[Guilherme G. Piccoli (gpiccoli)]

Observed on G/KVM, cycle sru-20210531 .

[Kleber Sacilotto de Souza (kleber-souza)]

Also found with focal/linux-hwe-5.11 on ADT.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1923683

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Kelsey Steele (kelsey-steele)]

Found on Impish 5.13.0-23.23

[Brian Murray (brian-murray)]

The Hirsute Hippo has reached End of Life, so this bug will not be fixed for that release.

[Brian Murray (brian-murray)]

Ubuntu 21.10 (Impish Indri) has reached end of life, so this bug will not be fixed for that specific release.