This should now be fixed with 777f290ab328 ("selftests/ftrace: adjust
offset for kprobe syntax error test"), which was pulled into Noble
6.8.0-58.60 in the 2025.03.17 cycle and Oracular 6.11.0-20.20 in the
2025.02.10 cycle.-- You received this bug notification because you are a member of Canonical Platform QA Team, which is subscribed to ubuntu-kernel-tests. https://bugs.launchpad.net/bugs/2072989 Title: kselftests_ftrace.ftrace:test.d--kprobe--kprobe_syntax_errors.tc fails on Noble ppc64el Status in ubuntu-kernel-tests: New Bug description: === Ftrace unit tests === [1] Kprobe event parser error log check [FAIL] execute: /home/ubuntu/autotest/client/tmp/ubuntu_kselftests_ftrace/src/linux/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc ... + tail -n 1 error_log + wc -c + N=30 + expr 13 + 17 + test 30 -eq 30 + check_error r vfs_read ^$arg* + ftrace_errlog_check trace_kprobe r vfs_read ^$arg* kprobe_events + printf %s r vfs_read + wc -c + pos=11 + printf %s r vfs_read ^$arg* + tr -d ^ + command=r vfs_read $arg* + echo Test command: r vfs_read $arg* Test command: r vfs_read $arg* + echo + grep trace_kprobe: error: -A 3 error_log [ 337.950203] trace_kprobe: error: $arg* can be used only on function entry Command: r vfs_read $arg* ^ + tail -n 1 error_log + wc -c + N=24 + expr 13 + 11 + test 24 -eq 24 + check_error p vfs_read+8 ^$arg* + ftrace_errlog_check trace_kprobe p vfs_read+8 ^$arg* kprobe_events + printf %s p vfs_read+8 + wc -c + pos=13 + printf %s p vfs_read+8 ^$arg* + tr -d ^ + command=p vfs_read+8 $arg* + echo Test command: p vfs_read+8 $arg* Test command: p vfs_read+8 $arg* + echo # of passed: 0 # of failed: 1 # of unresolved: 0 # of untested: 0 # of unsupported: 0 # of xfailed: 0 # of undefined(test bug): 0 The test seems to die on this line: kprobe_syntax_errors.tc:112: check_error 'p vfs_read+8 ^$arg*' # NOFENTRY_ARGS check_error is basically a wrapper around this function: # Since probe event command may include backslash, explicitly use printf "%s" # to NOT interpret it. ftrace_errlog_check() { # err-prefix command-with-error-pos-by-^ command-file pos=$(printf "%s" "${2%^*}" | wc -c) # error position command=$(printf "%s" "$2" | tr -d ^) echo "Test command: $command" echo > error_log (! printf "%s" "$command" >> "$3" ) 2> /dev/null grep "$1: error:" -A 3 error_log N=$(tail -n 1 error_log | wc -c) # " Command: " and "^\n" => 13 test $(expr 13 + $pos) -eq $N } The last line executed is: echo > error_log Observed on ppc64el.9/ppc64el.10 metal instances with noble:linux in s2024.06.10. The issue is present since we started testing noble in SRU cycle 2024.04.29 at least. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/2072989/+subscriptions -- Mailing list: https://launchpad.net/~canonical-ubuntu-qa Post to : canonical-ubuntu-qa@lists.launchpad.net Unsubscribe : https://launchpad.net/~canonical-ubuntu-qa More help : https://help.launchpad.net/ListHelp
