Public bug reported:
Failure spotted on Bionic / Cosmic i386 (node fozzie)
[22] Kprobe event string type argument [FAIL]
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] Snapshot and tracing setting [PASS]
[6] event tracing - enable/disable with event level files [PASS]
[7] event tracing - restricts events based on pid [PASS]
[8] event tracing - enable/disable with subsystem level files [PASS]
[9] event tracing - enable/disable with top level files [PASS]
[10] ftrace - function graph filters with stack tracer [PASS]
[11] ftrace - function graph filters [PASS]
[12] ftrace - function pid filters [PASS]
[13] ftrace - test for function event triggers [PASS]
[14] ftrace - function profiler with function tracing [PASS]
[15] ftrace - test reading of set_ftrace_filter [PASS]
[16] ftrace - test for function traceon/off triggers [PASS]
[17] Test creation and deletion of trace instances while setting an event
[PASS]
[18] Test creation and deletion of trace instances [PASS]
[19] Kprobe dynamic event - adding and removing [PASS]
[20] Kprobe dynamic event - busy event check [PASS]
[21] Kprobe dynamic event with arguments [PASS]
[22] Kprobe event string type argument [FAIL]
[23] Kprobe event argument syntax [PASS]
[24] Kprobes event arguments with types [PASS]
[25] Kprobe event auto/manual naming [PASS]
[26] Kprobe dynamic event with function tracer [PASS]
[27] Kretprobe dynamic event with arguments [PASS]
[28] Kretprobe dynamic event with maxactive [PASS]
[29] Register/unregister many kprobe events [PASS]
[30] event trigger - test extended error support [PASS]
[31] event trigger - test field variable support [PASS]
[32] event trigger - test multiple actions on hist trigger [PASS]
[33] event trigger - test inter-event histogram trigger onmatch action [PASS]
[34] event trigger - test inter-event histogram trigger onmatch-onmax action
[PASS]
[35] event trigger - test inter-event histogram trigger onmax action [PASS]
[36] event trigger - test synthetic_events syntax parser [PASS]
[37] event trigger - test event enable/disable trigger [PASS]
[38] event trigger - test trigger filter [PASS]
[39] event trigger - test histogram modifiers [PASS]
[40] event trigger - test multiple histogram triggers [PASS]
[41] event trigger - test snapshot-trigger [PASS]
[42] event trigger - test stacktrace-trigger [PASS]
[43] trace_marker trigger - test snapshot trigger [PASS]
[44] trace_marker trigger - test histogram with synthetic event against kernel
event [PASS]
[45] trace_marker trigger - test histogram with synthetic event [PASS]
[46] event trigger - test traceon/off trigger [PASS]
[47] (instance) Basic test for tracers [PASS]
[48] (instance) Basic trace clock test [PASS]
[49] (instance) Snapshot and tracing setting [PASS]
[50] (instance) event tracing - enable/disable with event level files [PASS]
[51] (instance) event tracing - restricts events based on pid [PASS]
[52] (instance) event tracing - enable/disable with subsystem level files
[PASS]
[53] (instance) ftrace - test for function event triggers [PASS]
[54] (instance) ftrace - test for function traceon/off triggers [PASS]
[55] (instance) event trigger - test event enable/disable trigger [PASS]
[56] (instance) event trigger - test trigger filter [PASS]
[57] (instance) event trigger - test histogram modifiers [PASS]
[58] (instance) event trigger - test multiple histogram triggers [PASS]
[59] (instance) trace_marker trigger - test snapshot trigger [PASS]
# of passed: 58
# of failed: 1
# of unresolved: 0
# of untested: 0
# of unsupported: 0
# of xfailed: 0
# of undefined(test bug): 0
not ok 1..1 selftests: ftrace: ftracetest [FAIL]
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: Incomplete
** Affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: Incomplete
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1825780
Title:
Kprobe event string type argument failed in ftrace from
ubuntu_kernel_selftests on B/C i386
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