I spent some time investigating today the uprobes tests failure. I
understand these test fail because the call to tracefs_event_enable() in
check_probes returns -1. It also encounters errno=524, which is
(apparently) the err number returned by seccomp when failing to load a
filter. (see https://github.com/moby/moby/issues/45498)


Going deeper, I found this is failing because instance_file_write is trying to 
write a file in 
/sys/kernel/tracing/instances/cunit_test_iter/events/utest/utest_u/ (and 
creating the directory).


I understand /sys/kernel/tracing is mounted as a tracefs. I am reading about it 
to understand what is going on.



 

** Bug watch added: github.com/moby/moby/issues #45498
   https://github.com/moby/moby/issues/45498

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https://bugs.launchpad.net/bugs/2055309

Title:
  No test suite run at built time nor as autopkgtest

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