canonical-ubuntu-qa team mailing list archive

[Po-Hsu Lin <2054362@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Issue found on B-hwe-5.4.0-173.191~18.04.1

This kprobe_non_uniq_symbol.tc test case came from stable update (bug
2049024) and landed in our Focal kernel since Ubuntu-5.4.0-173.191

So this is not a regression, but a new test case.

Test log:
 Running './ftracetest -vvv test.d/kprobe/kprobe_non_uniq_symbol.tc'
 === Ftrace unit tests ===
 + initialize_ftrace
 + disable_tracing
 + echo 0
 + reset_tracer
 + echo nop
 + reset_trigger
 + [ -d events/synthetic ]
 ...
 + read line
 ...
 + read line
 ...
 + reset_events_filter
 + read line
 ...
 + reset_ftrace_filter
 + [ ! -f set_ftrace_filter ]
 + echo
 + grep -v ^# set_ftrace_filter
 + read t
 + disable_events
 + echo 0
 + [ -f set_event_pid ]
 + echo
 + [ -f set_ftrace_pid ]
 + echo
 + [ -f set_ftrace_notrace ]
 + echo
 + [ -f set_graph_function ]
 [1] Test failure of registering kprobe on non unique symbol
 + echo
 + tee set_graph_function set_graph_notrace
 + [ -f stack_trace_filter ]
 + echo
 + [ -f kprobe_events ]
 + echo
 + [ -f uprobe_events ]
 + echo
 + [ -f synthetic_events ]
 + echo
 + [ -f snapshot ]
 + echo 0
 + clear_trace
 + echo
 + enable_tracing
 + echo 1
 + . /home/ubuntu/autotest/client/tmp/ubuntu_kselftests_ftrace/src/linux/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc
 + SYMBOL=name_show
 + grep -c -E [[:alnum:]]+ t name_show /proc/kallsyms
 + [ 14 -le 1 ]
 + echo p:test_non_unique name_show
     [FAIL]
 
 
 # of passed:  0
 # of failed:  1
 # of unresolved:  0
 # of untested:  0
 # of unsupported:  0
 # of xfailed:  0
 # of undefined(test bug):  0

I think we're probably missing
https://github.com/torvalds/linux/commit/b022f0c7e404887a7c5229788fc99eff9f9a80d5

** Affects: ubuntu-kernel-tests
     Importance: Undecided
         Status: New


** Tags: 5.4 bionic sru-20240205 ubuntu-kselftests-ftrace

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https://bugs.launchpad.net/bugs/2054362

Title:
  ftrace:test.d--kprobe--kprobe_non_uniq_symbol.tc from
  ubuntu_kselftests_ftrace failed on 5.4

Status in ubuntu-kernel-tests:
  New

Bug description:
  Issue found on B-hwe-5.4.0-173.191~18.04.1

  This kprobe_non_uniq_symbol.tc test case came from stable update (bug
  2049024) and landed in our Focal kernel since Ubuntu-5.4.0-173.191

  So this is not a regression, but a new test case.

  Test log:
   Running './ftracetest -vvv test.d/kprobe/kprobe_non_uniq_symbol.tc'
   === Ftrace unit tests ===
   + initialize_ftrace
   + disable_tracing
   + echo 0
   + reset_tracer
   + echo nop
   + reset_trigger
   + [ -d events/synthetic ]
   ...
   + read line
   ...
   + read line
   ...
   + reset_events_filter
   + read line
   ...
   + reset_ftrace_filter
   + [ ! -f set_ftrace_filter ]
   + echo
   + grep -v ^# set_ftrace_filter
   + read t
   + disable_events
   + echo 0
   + [ -f set_event_pid ]
   + echo
   + [ -f set_ftrace_pid ]
   + echo
   + [ -f set_ftrace_notrace ]
   + echo
   + [ -f set_graph_function ]
   [1] Test failure of registering kprobe on non unique symbol
   + echo
   + tee set_graph_function set_graph_notrace
   + [ -f stack_trace_filter ]
   + echo
   + [ -f kprobe_events ]
   + echo
   + [ -f uprobe_events ]
   + echo
   + [ -f synthetic_events ]
   + echo
   + [ -f snapshot ]
   + echo 0
   + clear_trace
   + echo
   + enable_tracing
   + echo 1
   + . /home/ubuntu/autotest/client/tmp/ubuntu_kselftests_ftrace/src/linux/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc
   + SYMBOL=name_show
   + grep -c -E [[:alnum:]]+ t name_show /proc/kallsyms
   + [ 14 -le 1 ]
   + echo p:test_non_unique name_show
       [FAIL]
   
   
   # of passed:  0
   # of failed:  1
   # of unresolved:  0
   # of untested:  0
   # of unsupported:  0
   # of xfailed:  0
   # of undefined(test bug):  0

  I think we're probably missing
  https://github.com/torvalds/linux/commit/b022f0c7e404887a7c5229788fc99eff9f9a80d5

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