Greeting, FYI, we noticed the following commit (built with gcc-9): commit: cfece71411dbca5dc5e1fa2d9ce5a3f38e55d4fe ("[PATCH v4 7/8] tracing/selftests: Add tests for hist trigger expression parsing") url: https://github.com/0day-ci/linux/commits/Kalesh-Singh/tracing-Extend-hist... in testcase: kernel-selftests version: kernel-selftests-x86_64-c8c9111a-1_20210929 with following parameters: group: ftrace ucode: 0xe2 test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel. test-url: https://www.kernel.org/doc/Documentation/kselftest.txt on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz with 32G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot <oliver.sang(a)intel.com&gt; TAP version 13 1..1 # selftests: ftrace: ftracetest # === Ftrace unit tests === # [1] Basic trace file check [PASS] ... <<< [1] - [67] have same results as parent, i.e. both PASS or both FAIL >>> ... # [67] event trigger - test multiple actions on hist trigger [PASS] # [68] event trigger - test inter-event histogram trigger onchange action [FAIL] # [69] event trigger - test inter-event histogram trigger onmatch action [FAIL] # [70] event trigger - test inter-event histogram trigger onmatch-onmax action [FAIL] # [71] event trigger - test inter-event histogram trigger onmax action [FAIL] # [72] event trigger - test inter-event histogram trigger snapshot action [FAIL] # [73] event trigger - test inter-event histogram trigger eprobe on synthetic event [FAIL] # [74] event trigger - test synthetic event create remove [FAIL] # [75] event trigger - test inter-event histogram trigger trace action with dynamic string param [FAIL] # [76] event trigger - test synthetic_events syntax parser [FAIL] # [77] event trigger - test synthetic_events syntax parser errors [FAIL] # [78] event trigger - test inter-event histogram trigger trace action [FAIL] # [79] event trigger - test event enable/disable trigger [FAIL] # [80] event trigger - test trigger filter [FAIL] # [81] event trigger - test histogram expression parsing [FAIL] # [82] event trigger - test histogram modifiers [FAIL] # [83] event trigger - test histogram parser errors [FAIL] # [84] event trigger - test histogram trigger [FAIL] # [85] event trigger - test multiple histogram triggers [FAIL] # [86] event trigger - test snapshot-trigger [FAIL] # [87] event trigger - test stacktrace-trigger [FAIL] # [88] trace_marker trigger - test histogram trigger [FAIL] # [89] trace_marker trigger - test snapshot trigger [FAIL] # [90] trace_marker trigger - test histogram with synthetic event against kernel event [FAIL] # [91] trace_marker trigger - test histogram with synthetic event [FAIL] # [92] event trigger - test traceon/off trigger [FAIL] # [93] (instance) Basic test for tracers [PASS] ... <<< [93] - [112] have same results as parent, all PASS >>> ... # [112] (instance) trace_marker trigger - test histogram trigger [PASS] # [113] (instance) trace_marker trigger - test snapshot trigger [PASS] # tac: failed to create temporary file in '/tmp/ftracetest-dir.o54lNh': No such file or directory # tac: failed to create temporary file in '/tmp/ftracetest-dir.o54lNh': No such file or directory # tac: failed to create temporary file in '/tmp/ftracetest-dir.o54lNh': No such file or directory # tac: failed to create temporary file in '/tmp/ftracetest-dir.o54lNh': No such file or directory # # # # of passed: 85 # # of failed: 26 # # of unresolved: 1 # # of untested: 0 # # of unsupported: 0 # # of xfailed: 1 # # of undefined(test bug): 0 not ok 1 selftests: ftrace: ftracetest # exit=1 To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests sudo bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run sudo bin/lkp run generated-yaml-file # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang