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[Bug 1977827] Re: ftrace in ubuntu_kernel_selftests failed with "check if duplicate events are caught" on J-kvm / L-kvm

To: canonical-ubuntu-qa@xxxxxxxxxxxxxxxxxxx
From: Po-Hsu Lin <1977827@xxxxxxxxxxxxxxxxxx>
Date: Tue, 05 Sep 2023 05:13:32 -0000
Reply-to: Bug 1977827 <1977827@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
** Summary changed:

- ftrace in ubuntu_kernel_selftests failed with "check if duplicate events are caught" on J-5.15 P9 / J-kvm / L-kvm
+ ftrace in ubuntu_kernel_selftests failed with "check if duplicate events are caught" on J-kvm / L-kvm

** Description changed:

+ (Thibf got this issue fixed for KVM kernels, for PPC please refer to bug
+ 2026592)
+ 
  Issue found on Jammy 5.15.0-36.37 with Power9 node baltar
  
  Test failed with:
  # [15] Generic dynamic event - check if duplicate events are caught [FAIL]
  
  Test Log:
-  make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
-  TAP version 13
-  1..1
-  # selftests: ftrace: ftracetest
-  # === Ftrace unit tests ===
-  # [1] Basic trace file check	[PASS]
-  # [2] Basic test for tracers	[PASS]
-  # [3] Basic trace clock test	[PASS]
-  # [4] Basic event tracing check	[PASS]
-  # [5] Change the ringbuffer size	[PASS]
-  # [6] Snapshot and tracing setting	[PASS]
-  # [7] trace_pipe and trace_marker	[PASS]
-  # [8] Test ftrace direct functions against tracers	[UNRESOLVED]
-  # [9] Test ftrace direct functions against kprobes	[UNRESOLVED]
-  # [10] Generic dynamic event - add/remove eprobe events	[PASS]
-  # [11] Generic dynamic event - add/remove kprobe events	[PASS]
-  # [12] Generic dynamic event - add/remove synthetic events	[PASS]
-  # [13] Generic dynamic event - selective clear (compatibility)	[PASS]
-  # [14] Generic dynamic event - generic clear event	[PASS]
-  # [15] Generic dynamic event - check if duplicate events are caught	[FAIL]
-  # [16] event tracing - enable/disable with event level files	[PASS]
-  # [17] event tracing - restricts events based on pid notrace filtering	[PASS]
-  # [18] event tracing - restricts events based on pid	[PASS]
-  # [19] event tracing - enable/disable with subsystem level files	[PASS]
-  # [20] event tracing - enable/disable with top level files	[PASS]
-  # [21] Test trace_printk from module	[PASS]
-  # [22] ftrace - function graph filters with stack tracer	[PASS]
-  # [23] ftrace - function graph filters	[PASS]
-  # [24] ftrace - function pid notrace filters	[PASS]
-  # [25] ftrace - function pid filters	[PASS]
-  # [26] ftrace - stacktrace filter command	[PASS]
-  # [27] ftrace - function trace with cpumask	[PASS]
-  # [28] ftrace - test for function event triggers	[PASS]
-  # [29] ftrace - function trace on module	[PASS]
-  # [30] ftrace - function profiling	[PASS]
-  # [31] ftrace - function profiler with function tracing	[PASS]
-  # [32] ftrace - test reading of set_ftrace_filter	[PASS]
-  # [33] ftrace - test for function traceon/off triggers	[PASS]
-  # [34] ftrace - test tracing error log support	[PASS]
-  # [35] Test creation and deletion of trace instances while setting an event	[PASS]
-  # [36] Test creation and deletion of trace instances	[PASS]
-  # [37] Kprobe dynamic event - adding and removing	[PASS]
-  # [38] Kprobe dynamic event - busy event check	[PASS]
-  # [39] Kprobe dynamic event with arguments	[PASS]
-  # [40] Kprobe event with comm arguments	[PASS]
-  # [41] Kprobe event string type argument	[PASS]
-  # [42] Kprobe event symbol argument	[PASS]
-  # [43] Kprobe event argument syntax	[PASS]
-  # [44] Kprobes event arguments with types	[PASS]
-  # [45] Kprobe event user-memory access	[UNSUPPORTED]
-  # [46] Kprobe event auto/manual naming	[PASS]
-  # [47] Kprobe dynamic event with function tracer	[PASS]
-  # [48] Create/delete multiprobe on kprobe event	[PASS]
-  # [49] Kprobe event parser error log check	[PASS]
-  # [50] Kretprobe dynamic event with arguments	[PASS]
-  # [51] Kretprobe dynamic event with maxactive	[PASS]
-  # [52] Kretprobe %return suffix test	[PASS]
-  # [53] Register/unregister many kprobe events	[PASS]
-  # [54] Kprobe profile	[PASS]
-  # [55] Uprobe event parser error log check	[PASS]
-  # [56] test for the preemptirqsoff tracer	[UNSUPPORTED]
-  # [57] Meta-selftest: Checkbashisms	[PASS]
-  # [58] Test wakeup tracer	[PASS]
-  # [59] Test wakeup RT tracer	[PASS]
-  # [60] event trigger - test inter-event histogram trigger expected fail actions	[XFAIL]
-  # [61] event trigger - test field variable support	[PASS]
-  # [62] event trigger - test multiple actions on hist trigger	[PASS]
-  # [63] event trigger - test inter-event histogram trigger onchange action	[PASS]
-  # [64] event trigger - test inter-event histogram trigger onmatch action	[PASS]
-  # [65] event trigger - test inter-event histogram trigger onmatch-onmax action	[PASS]
-  # [66] event trigger - test inter-event histogram trigger onmax action	[PASS]
-  # [67] event trigger - test inter-event histogram trigger snapshot action	[PASS]
-  # [68] event trigger - test inter-event histogram trigger eprobe on synthetic event	[PASS]
-  # [69] event trigger - test inter-event histogram trigger trace action with dynamic string param	[PASS]
-  # [70] event trigger - test synthetic_events syntax parser	[PASS]
-  # [71] event trigger - test synthetic_events syntax parser errors	[PASS]
-  # [72] event trigger - test inter-event histogram trigger trace action	[PASS]
-  # [73] event trigger - test event enable/disable trigger	[PASS]
-  # [74] event trigger - test trigger filter	[PASS]
-  # [75] event trigger - test histogram modifiers	[PASS]
-  # [76] event trigger - test histogram parser errors	[PASS]
-  # [77] event trigger - test multiple histogram triggers	[PASS]
-  # [78] event trigger - test snapshot-trigger	[PASS]
-  # [79] event trigger - test stacktrace-trigger	[PASS]
-  # [80] trace_marker trigger - test snapshot trigger	[PASS]
-  # [81] trace_marker trigger - test histogram with synthetic event against kernel event	[PASS]
-  # [82] trace_marker trigger - test histogram with synthetic event	[PASS]
-  # [83] event trigger - test traceon/off trigger	[PASS]
-  # [84] (instance)  Basic test for tracers	[PASS]
-  # [85] (instance)  Basic trace clock test	[PASS]
-  # [86] (instance)  Change the ringbuffer size	[PASS]
-  # [87] (instance)  Snapshot and tracing setting	[PASS]
-  # [88] (instance)  trace_pipe and trace_marker	[PASS]
-  # [89] (instance)  event tracing - enable/disable with event level files	[PASS]
-  # [90] (instance)  event tracing - restricts events based on pid notrace filtering	[PASS]
-  # [91] (instance)  event tracing - restricts events based on pid	[PASS]
-  # [92] (instance)  event tracing - enable/disable with subsystem level files	[PASS]
-  # [93] (instance)  ftrace - function pid notrace filters	[PASS]
-  # [94] (instance)  ftrace - function pid filters	[PASS]
-  # [95] (instance)  ftrace - stacktrace filter command	[PASS]
-  # [96] (instance)  ftrace - test for function event triggers	[PASS]
-  # [97] (instance)  ftrace - test for function traceon/off triggers	[PASS]
-  # [98] (instance)  event trigger - test event enable/disable trigger	[PASS]
-  # [99] (instance)  event trigger - test trigger filter	[PASS]
-  # [100] (instance)  event trigger - test histogram modifiers	[PASS]
-  # [101] (instance)  event trigger - test multiple histogram triggers	[PASS]
-  # [102] (instance)  trace_marker trigger - test snapshot trigger	[PASS]
-  # 
-  # 
-  # # of passed:  96
-  # # of failed:  1
-  # # of unresolved:  2
-  # # of untested:  0
-  # # of unsupported:  2
-  # # of xfailed:  1
-  # # of undefined(test bug):  0
-  not ok 1 selftests: ftrace: ftracetest # exit=1
+  make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
+  TAP version 13
+  1..1
+  # selftests: ftrace: ftracetest
+  # === Ftrace unit tests ===
+  # [1] Basic trace file check	[PASS]
+  # [2] Basic test for tracers	[PASS]
+  # [3] Basic trace clock test	[PASS]
+  # [4] Basic event tracing check	[PASS]
+  # [5] Change the ringbuffer size	[PASS]
+  # [6] Snapshot and tracing setting	[PASS]
+  # [7] trace_pipe and trace_marker	[PASS]
+  # [8] Test ftrace direct functions against tracers	[UNRESOLVED]
+  # [9] Test ftrace direct functions against kprobes	[UNRESOLVED]
+  # [10] Generic dynamic event - add/remove eprobe events	[PASS]
+  # [11] Generic dynamic event - add/remove kprobe events	[PASS]
+  # [12] Generic dynamic event - add/remove synthetic events	[PASS]
+  # [13] Generic dynamic event - selective clear (compatibility)	[PASS]
+  # [14] Generic dynamic event - generic clear event	[PASS]
+  # [15] Generic dynamic event - check if duplicate events are caught	[FAIL]
+  # [16] event tracing - enable/disable with event level files	[PASS]
+  # [17] event tracing - restricts events based on pid notrace filtering	[PASS]
+  # [18] event tracing - restricts events based on pid	[PASS]
+  # [19] event tracing - enable/disable with subsystem level files	[PASS]
+  # [20] event tracing - enable/disable with top level files	[PASS]
+  # [21] Test trace_printk from module	[PASS]
+  # [22] ftrace - function graph filters with stack tracer	[PASS]
+  # [23] ftrace - function graph filters	[PASS]
+  # [24] ftrace - function pid notrace filters	[PASS]
+  # [25] ftrace - function pid filters	[PASS]
+  # [26] ftrace - stacktrace filter command	[PASS]
+  # [27] ftrace - function trace with cpumask	[PASS]
+  # [28] ftrace - test for function event triggers	[PASS]
+  # [29] ftrace - function trace on module	[PASS]
+  # [30] ftrace - function profiling	[PASS]
+  # [31] ftrace - function profiler with function tracing	[PASS]
+  # [32] ftrace - test reading of set_ftrace_filter	[PASS]
+  # [33] ftrace - test for function traceon/off triggers	[PASS]
+  # [34] ftrace - test tracing error log support	[PASS]
+  # [35] Test creation and deletion of trace instances while setting an event	[PASS]
+  # [36] Test creation and deletion of trace instances	[PASS]
+  # [37] Kprobe dynamic event - adding and removing	[PASS]
+  # [38] Kprobe dynamic event - busy event check	[PASS]
+  # [39] Kprobe dynamic event with arguments	[PASS]
+  # [40] Kprobe event with comm arguments	[PASS]
+  # [41] Kprobe event string type argument	[PASS]
+  # [42] Kprobe event symbol argument	[PASS]
+  # [43] Kprobe event argument syntax	[PASS]
+  # [44] Kprobes event arguments with types	[PASS]
+  # [45] Kprobe event user-memory access	[UNSUPPORTED]
+  # [46] Kprobe event auto/manual naming	[PASS]
+  # [47] Kprobe dynamic event with function tracer	[PASS]
+  # [48] Create/delete multiprobe on kprobe event	[PASS]
+  # [49] Kprobe event parser error log check	[PASS]
+  # [50] Kretprobe dynamic event with arguments	[PASS]
+  # [51] Kretprobe dynamic event with maxactive	[PASS]
+  # [52] Kretprobe %return suffix test	[PASS]
+  # [53] Register/unregister many kprobe events	[PASS]
+  # [54] Kprobe profile	[PASS]
+  # [55] Uprobe event parser error log check	[PASS]
+  # [56] test for the preemptirqsoff tracer	[UNSUPPORTED]
+  # [57] Meta-selftest: Checkbashisms	[PASS]
+  # [58] Test wakeup tracer	[PASS]
+  # [59] Test wakeup RT tracer	[PASS]
+  # [60] event trigger - test inter-event histogram trigger expected fail actions	[XFAIL]
+  # [61] event trigger - test field variable support	[PASS]
+  # [62] event trigger - test multiple actions on hist trigger	[PASS]
+  # [63] event trigger - test inter-event histogram trigger onchange action	[PASS]
+  # [64] event trigger - test inter-event histogram trigger onmatch action	[PASS]
+  # [65] event trigger - test inter-event histogram trigger onmatch-onmax action	[PASS]
+  # [66] event trigger - test inter-event histogram trigger onmax action	[PASS]
+  # [67] event trigger - test inter-event histogram trigger snapshot action	[PASS]
+  # [68] event trigger - test inter-event histogram trigger eprobe on synthetic event	[PASS]
+  # [69] event trigger - test inter-event histogram trigger trace action with dynamic string param	[PASS]
+  # [70] event trigger - test synthetic_events syntax parser	[PASS]
+  # [71] event trigger - test synthetic_events syntax parser errors	[PASS]
+  # [72] event trigger - test inter-event histogram trigger trace action	[PASS]
+  # [73] event trigger - test event enable/disable trigger	[PASS]
+  # [74] event trigger - test trigger filter	[PASS]
+  # [75] event trigger - test histogram modifiers	[PASS]
+  # [76] event trigger - test histogram parser errors	[PASS]
+  # [77] event trigger - test multiple histogram triggers	[PASS]
+  # [78] event trigger - test snapshot-trigger	[PASS]
+  # [79] event trigger - test stacktrace-trigger	[PASS]
+  # [80] trace_marker trigger - test snapshot trigger	[PASS]
+  # [81] trace_marker trigger - test histogram with synthetic event against kernel event	[PASS]
+  # [82] trace_marker trigger - test histogram with synthetic event	[PASS]
+  # [83] event trigger - test traceon/off trigger	[PASS]
+  # [84] (instance)  Basic test for tracers	[PASS]
+  # [85] (instance)  Basic trace clock test	[PASS]
+  # [86] (instance)  Change the ringbuffer size	[PASS]
+  # [87] (instance)  Snapshot and tracing setting	[PASS]
+  # [88] (instance)  trace_pipe and trace_marker	[PASS]
+  # [89] (instance)  event tracing - enable/disable with event level files	[PASS]
+  # [90] (instance)  event tracing - restricts events based on pid notrace filtering	[PASS]
+  # [91] (instance)  event tracing - restricts events based on pid	[PASS]
+  # [92] (instance)  event tracing - enable/disable with subsystem level files	[PASS]
+  # [93] (instance)  ftrace - function pid notrace filters	[PASS]
+  # [94] (instance)  ftrace - function pid filters	[PASS]
+  # [95] (instance)  ftrace - stacktrace filter command	[PASS]
+  # [96] (instance)  ftrace - test for function event triggers	[PASS]
+  # [97] (instance)  ftrace - test for function traceon/off triggers	[PASS]
+  # [98] (instance)  event trigger - test event enable/disable trigger	[PASS]
+  # [99] (instance)  event trigger - test trigger filter	[PASS]
+  # [100] (instance)  event trigger - test histogram modifiers	[PASS]
+  # [101] (instance)  event trigger - test multiple histogram triggers	[PASS]
+  # [102] (instance)  trace_marker trigger - test snapshot trigger	[PASS]
+  #
+  #
+  # # of passed:  96
+  # # of failed:  1
+  # # of unresolved:  2
+  # # of untested:  0
+  # # of unsupported:  2
+  # # of xfailed:  1
+  # # of undefined(test bug):  0
+  not ok 1 selftests: ftrace: ftracetest # exit=1
  
  This is not a regression, I can see this issue with 5.15.0-30.31 as well.
  We just don't have a bug report for this.

** Changed in: linux (Ubuntu)
       Status: In Progress => Invalid

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https://bugs.launchpad.net/bugs/1977827

Title:
  ftrace in ubuntu_kernel_selftests failed with "check if duplicate
  events are caught" on J-kvm / L-kvm

Status in ubuntu-kernel-tests:
  Fix Committed
Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Jammy:
  Fix Released
Status in linux source package in Kinetic:
  Fix Committed
Status in linux source package in Lunar:
  Fix Released

Bug description:
  (Thibf got this issue fixed for KVM kernels, for PPC please refer to
  bug 2026592)

  Issue found on Jammy 5.15.0-36.37 with Power9 node baltar

  Test failed with:
  # [15] Generic dynamic event - check if duplicate events are caught [FAIL]

  Test Log:
   make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
   TAP version 13
   1..1
   # selftests: ftrace: ftracetest
   # === Ftrace unit tests ===
   # [1] Basic trace file check	[PASS]
   # [2] Basic test for tracers	[PASS]
   # [3] Basic trace clock test	[PASS]
   # [4] Basic event tracing check	[PASS]
   # [5] Change the ringbuffer size	[PASS]
   # [6] Snapshot and tracing setting	[PASS]
   # [7] trace_pipe and trace_marker	[PASS]
   # [8] Test ftrace direct functions against tracers	[UNRESOLVED]
   # [9] Test ftrace direct functions against kprobes	[UNRESOLVED]
   # [10] Generic dynamic event - add/remove eprobe events	[PASS]
   # [11] Generic dynamic event - add/remove kprobe events	[PASS]
   # [12] Generic dynamic event - add/remove synthetic events	[PASS]
   # [13] Generic dynamic event - selective clear (compatibility)	[PASS]
   # [14] Generic dynamic event - generic clear event	[PASS]
   # [15] Generic dynamic event - check if duplicate events are caught	[FAIL]
   # [16] event tracing - enable/disable with event level files	[PASS]
   # [17] event tracing - restricts events based on pid notrace filtering	[PASS]
   # [18] event tracing - restricts events based on pid	[PASS]
   # [19] event tracing - enable/disable with subsystem level files	[PASS]
   # [20] event tracing - enable/disable with top level files	[PASS]
   # [21] Test trace_printk from module	[PASS]
   # [22] ftrace - function graph filters with stack tracer	[PASS]
   # [23] ftrace - function graph filters	[PASS]
   # [24] ftrace - function pid notrace filters	[PASS]
   # [25] ftrace - function pid filters	[PASS]
   # [26] ftrace - stacktrace filter command	[PASS]
   # [27] ftrace - function trace with cpumask	[PASS]
   # [28] ftrace - test for function event triggers	[PASS]
   # [29] ftrace - function trace on module	[PASS]
   # [30] ftrace - function profiling	[PASS]
   # [31] ftrace - function profiler with function tracing	[PASS]
   # [32] ftrace - test reading of set_ftrace_filter	[PASS]
   # [33] ftrace - test for function traceon/off triggers	[PASS]
   # [34] ftrace - test tracing error log support	[PASS]
   # [35] Test creation and deletion of trace instances while setting an event	[PASS]
   # [36] Test creation and deletion of trace instances	[PASS]
   # [37] Kprobe dynamic event - adding and removing	[PASS]
   # [38] Kprobe dynamic event - busy event check	[PASS]
   # [39] Kprobe dynamic event with arguments	[PASS]
   # [40] Kprobe event with comm arguments	[PASS]
   # [41] Kprobe event string type argument	[PASS]
   # [42] Kprobe event symbol argument	[PASS]
   # [43] Kprobe event argument syntax	[PASS]
   # [44] Kprobes event arguments with types	[PASS]
   # [45] Kprobe event user-memory access	[UNSUPPORTED]
   # [46] Kprobe event auto/manual naming	[PASS]
   # [47] Kprobe dynamic event with function tracer	[PASS]
   # [48] Create/delete multiprobe on kprobe event	[PASS]
   # [49] Kprobe event parser error log check	[PASS]
   # [50] Kretprobe dynamic event with arguments	[PASS]
   # [51] Kretprobe dynamic event with maxactive	[PASS]
   # [52] Kretprobe %return suffix test	[PASS]
   # [53] Register/unregister many kprobe events	[PASS]
   # [54] Kprobe profile	[PASS]
   # [55] Uprobe event parser error log check	[PASS]
   # [56] test for the preemptirqsoff tracer	[UNSUPPORTED]
   # [57] Meta-selftest: Checkbashisms	[PASS]
   # [58] Test wakeup tracer	[PASS]
   # [59] Test wakeup RT tracer	[PASS]
   # [60] event trigger - test inter-event histogram trigger expected fail actions	[XFAIL]
   # [61] event trigger - test field variable support	[PASS]
   # [62] event trigger - test multiple actions on hist trigger	[PASS]
   # [63] event trigger - test inter-event histogram trigger onchange action	[PASS]
   # [64] event trigger - test inter-event histogram trigger onmatch action	[PASS]
   # [65] event trigger - test inter-event histogram trigger onmatch-onmax action	[PASS]
   # [66] event trigger - test inter-event histogram trigger onmax action	[PASS]
   # [67] event trigger - test inter-event histogram trigger snapshot action	[PASS]
   # [68] event trigger - test inter-event histogram trigger eprobe on synthetic event	[PASS]
   # [69] event trigger - test inter-event histogram trigger trace action with dynamic string param	[PASS]
   # [70] event trigger - test synthetic_events syntax parser	[PASS]
   # [71] event trigger - test synthetic_events syntax parser errors	[PASS]
   # [72] event trigger - test inter-event histogram trigger trace action	[PASS]
   # [73] event trigger - test event enable/disable trigger	[PASS]
   # [74] event trigger - test trigger filter	[PASS]
   # [75] event trigger - test histogram modifiers	[PASS]
   # [76] event trigger - test histogram parser errors	[PASS]
   # [77] event trigger - test multiple histogram triggers	[PASS]
   # [78] event trigger - test snapshot-trigger	[PASS]
   # [79] event trigger - test stacktrace-trigger	[PASS]
   # [80] trace_marker trigger - test snapshot trigger	[PASS]
   # [81] trace_marker trigger - test histogram with synthetic event against kernel event	[PASS]
   # [82] trace_marker trigger - test histogram with synthetic event	[PASS]
   # [83] event trigger - test traceon/off trigger	[PASS]
   # [84] (instance)  Basic test for tracers	[PASS]
   # [85] (instance)  Basic trace clock test	[PASS]
   # [86] (instance)  Change the ringbuffer size	[PASS]
   # [87] (instance)  Snapshot and tracing setting	[PASS]
   # [88] (instance)  trace_pipe and trace_marker	[PASS]
   # [89] (instance)  event tracing - enable/disable with event level files	[PASS]
   # [90] (instance)  event tracing - restricts events based on pid notrace filtering	[PASS]
   # [91] (instance)  event tracing - restricts events based on pid	[PASS]
   # [92] (instance)  event tracing - enable/disable with subsystem level files	[PASS]
   # [93] (instance)  ftrace - function pid notrace filters	[PASS]
   # [94] (instance)  ftrace - function pid filters	[PASS]
   # [95] (instance)  ftrace - stacktrace filter command	[PASS]
   # [96] (instance)  ftrace - test for function event triggers	[PASS]
   # [97] (instance)  ftrace - test for function traceon/off triggers	[PASS]
   # [98] (instance)  event trigger - test event enable/disable trigger	[PASS]
   # [99] (instance)  event trigger - test trigger filter	[PASS]
   # [100] (instance)  event trigger - test histogram modifiers	[PASS]
   # [101] (instance)  event trigger - test multiple histogram triggers	[PASS]
   # [102] (instance)  trace_marker trigger - test snapshot trigger	[PASS]
   #
   #
   # # of passed:  96
   # # of failed:  1
   # # of unresolved:  2
   # # of untested:  0
   # # of unsupported:  2
   # # of xfailed:  1
   # # of undefined(test bug):  0
   not ok 1 selftests: ftrace: ftracetest # exit=1

  This is not a regression, I can see this issue with 5.15.0-30.31 as well.
  We just don't have a bug report for this.

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