Hello, while investigating bug 1861359 I tried to use kprobe-perf to troubleshoot and found that tracing doesn't work on focal:
# kprobe-perf -s 'p:shrink_node'
ERROR: func shrink_node not in /sys/kernel/debug/tracing/available_filter_functions.
Either it doesn't exist, or, it might be unsafe to kprobe. Exiting. Use -F to override.
# ls -l /sys/kernel/debug/tracing/available_filter_functions
ls: cannot access '/sys/kernel/debug/tracing/available_filter_functions': No such file or directory
# find /sys/kernel/debug/tracing
/sys/kernel/debug/tracing
/sys/kernel/debug/tracing/instances
/sys/kernel/debug/tracing/trace_stat
/sys/kernel/debug/tracing/per_cpu
/sys/kernel/debug/tracing/per_cpu/cpu7
/sys/kernel/debug/tracing/per_cpu/cpu6
/sys/kernel/debug/tracing/per_cpu/cpu5
/sys/kernel/debug/tracing/per_cpu/cpu4
/sys/kernel/debug/tracing/per_cpu/cpu3
/sys/kernel/debug/tracing/per_cpu/cpu2
/sys/kernel/debug/tracing/per_cpu/cpu1
/sys/kernel/debug/tracing/per_cpu/cpu0
/sys/kernel/debug/tracing/options
I'm guessing this is due to lockdown:
# dmesg | grep -C2 -i lockdown
[ 0.000000] efi: TPMFinalLog=0x9ff92000 SMBIOS=0x9f05d000 SMBIOS 3.0=0x9f05a000 ACPI=0x9fffe000 ACPI 2.0=0x9fffe014 ESRT=0x9eee7000 MEMATTR=0x99c76018 TPMEventLog=0x931f7018
[ 0.000000] secureboot: Secure boot enabled
[ 0.000000] Kernel is locked down from EFI Secure Boot mode; see man kernel_lockdown.7
[ 0.000000] SMBIOS 3.0.0 present.
[ 0.000000] DMI: LENOVO 20KHCTO1WW/20KHCTO1WW, BIOS N23ET69W (1.44 ) 11/25/2019
--
[ 0.532664] hpet0: 8 comparators, 64-bit 24.000000 MHz counter
[ 0.534731] clocksource: Switched to clocksource tsc-early
[ 0.534737] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534737] Could not create tracefs 'available_events' entry
[ 0.534741] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534741] Could not create tracefs 'set_event' entry
[ 0.534742] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534743] Could not create tracefs 'available_tracers' entry
[ 0.534744] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534745] Could not create tracefs 'current_tracer' entry
[ 0.534745] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534746] Could not create tracefs 'tracing_cpumask' entry
[ 0.534747] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534747] Could not create tracefs 'trace_options' entry
[ 0.534748] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534748] Could not create tracefs 'trace' entry
[ 0.534749] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534750] Could not create tracefs 'trace_pipe' entry
[ 0.534750] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534751] Could not create tracefs 'buffer_size_kb' entry
[ 0.534752] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534752] Could not create tracefs 'buffer_total_size_kb' entry
[ 0.534753] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534754] Could not create tracefs 'free_buffer' entry
[ 0.534754] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534755] Could not create tracefs 'trace_marker' entry
[ 0.534782] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534783] Could not create tracefs 'trace_marker_raw' entry
[ 0.534783] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534784] Could not create tracefs 'trace_clock' entry
[ 0.534785] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534785] Could not create tracefs 'tracing_on' entry
[ 0.534786] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534786] Could not create tracefs 'timestamp_mode' entry
[ 0.534787] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534788] Could not create tracefs 'buffer_percent' entry
[ 0.534816] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534817] Could not create tracefs 'print-parent' entry
[ 0.534817] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534818] Could not create tracefs 'sym-offset' entry
[ 0.534819] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534819] Could not create tracefs 'sym-addr' entry
[ 0.534820] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534820] Could not create tracefs 'verbose' entry
[ 0.534821] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534822] Could not create tracefs 'raw' entry
[ 0.534822] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534823] Could not create tracefs 'hex' entry
[ 0.534824] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534824] Could not create tracefs 'bin' entry
[ 0.534825] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534825] Could not create tracefs 'block' entry
[ 0.534826] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534827] Could not create tracefs 'trace_printk' entry
[ 0.534827] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534828] Could not create tracefs 'annotate' entry
[ 0.534829] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534829] Could not create tracefs 'userstacktrace' entry
[ 0.534830] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534830] Could not create tracefs 'sym-userobj' entry
[ 0.534831] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534832] Could not create tracefs 'printk-msg-only' entry
[ 0.534832] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534833] Could not create tracefs 'context-info' entry
[ 0.534834] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534834] Could not create tracefs 'latency-format' entry
[ 0.534835] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534835] Could not create tracefs 'record-cmd' entry
[ 0.534836] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534837] Could not create tracefs 'record-tgid' entry
[ 0.534837] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534838] Could not create tracefs 'overwrite' entry
[ 0.534838] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534839] Could not create tracefs 'disable_on_free' entry
[ 0.534840] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534840] Could not create tracefs 'irq-info' entry
[ 0.534841] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534841] Could not create tracefs 'markers' entry
[ 0.534842] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534843] Could not create tracefs 'event-fork' entry
[ 0.534843] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534844] Could not create tracefs 'function-trace' entry
[ 0.534844] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534845] Could not create tracefs 'function-fork' entry
[ 0.534846] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534846] Could not create tracefs 'display-graph' entry
[ 0.534847] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534848] Could not create tracefs 'stacktrace' entry
[ 0.534848] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534849] Could not create tracefs 'tracing_max_latency' entry
[ 0.534850] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534850] Could not create tracefs 'snapshot' entry
[ 0.534851] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534851] Could not create tracefs 'error_log' entry
[ 0.534855] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534855] Could not create tracefs 'trace_pipe' entry
[ 0.534856] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534857] Could not create tracefs 'trace' entry
[ 0.534857] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534858] Could not create tracefs 'trace_pipe_raw' entry
[ 0.534858] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534859] Could not create tracefs 'stats' entry
[ 0.534860] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534860] Could not create tracefs 'buffer_size_kb' entry
[ 0.534861] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534862] Could not create tracefs 'snapshot' entry
[ 0.534862] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534863] Could not create tracefs 'snapshot_raw' entry
[ 0.534864] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534865] Could not create tracefs 'trace_pipe' entry
[ 0.534866] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534866] Could not create tracefs 'trace' entry
[ 0.534867] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534867] Could not create tracefs 'trace_pipe_raw' entry
[ 0.534868] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534869] Could not create tracefs 'stats' entry
[ 0.534869] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534870] Could not create tracefs 'buffer_size_kb' entry
[ 0.534870] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534871] Could not create tracefs 'snapshot' entry
[ 0.534872] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534872] Could not create tracefs 'snapshot_raw' entry
[ 0.534874] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534874] Could not create tracefs 'trace_pipe' entry
[ 0.534875] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534875] Could not create tracefs 'trace' entry
[ 0.534876] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534877] Could not create tracefs 'trace_pipe_raw' entry
[ 0.534877] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534878] Could not create tracefs 'stats' entry
[ 0.534879] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534879] Could not create tracefs 'buffer_size_kb' entry
[ 0.534880] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534880] Could not create tracefs 'snapshot' entry
[ 0.534881] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534881] Could not create tracefs 'snapshot_raw' entry
[ 0.534885] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534885] Could not create tracefs 'trace_pipe' entry
[ 0.534886] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534887] Could not create tracefs 'trace' entry
[ 0.534887] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534888] Could not create tracefs 'trace_pipe_raw' entry
[ 0.534888] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534889] Could not create tracefs 'stats' entry
[ 0.534890] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534890] Could not create tracefs 'buffer_size_kb' entry
[ 0.534891] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534891] Could not create tracefs 'snapshot' entry
[ 0.534892] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534893] Could not create tracefs 'snapshot_raw' entry
[ 0.534894] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534895] Could not create tracefs 'trace_pipe' entry
[ 0.534895] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534896] Could not create tracefs 'trace' entry
[ 0.534897] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534897] Could not create tracefs 'trace_pipe_raw' entry
[ 0.534898] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534898] Could not create tracefs 'stats' entry
[ 0.534899] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534900] Could not create tracefs 'buffer_size_kb' entry
[ 0.534900] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534901] Could not create tracefs 'snapshot' entry
[ 0.534901] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534902] Could not create tracefs 'snapshot_raw' entry
[ 0.534904] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534904] Could not create tracefs 'trace_pipe' entry
[ 0.534905] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534905] Could not create tracefs 'trace' entry
[ 0.534906] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534907] Could not create tracefs 'trace_pipe_raw' entry
[ 0.534907] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534908] Could not create tracefs 'stats' entry
[ 0.534908] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534909] Could not create tracefs 'buffer_size_kb' entry
[ 0.534910] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534910] Could not create tracefs 'snapshot' entry
[ 0.534911] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534911] Could not create tracefs 'snapshot_raw' entry
[ 0.534913] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534914] Could not create tracefs 'trace_pipe' entry
[ 0.534914] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534915] Could not create tracefs 'trace' entry
[ 0.534915] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534916] Could not create tracefs 'trace_pipe_raw' entry
[ 0.534917] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534917] Could not create tracefs 'stats' entry
[ 0.534918] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534918] Could not create tracefs 'buffer_size_kb' entry
[ 0.534919] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534920] Could not create tracefs 'snapshot' entry
[ 0.534920] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534921] Could not create tracefs 'snapshot_raw' entry
[ 0.534922] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534923] Could not create tracefs 'trace_pipe' entry
[ 0.534924] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534924] Could not create tracefs 'trace' entry
[ 0.534925] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534925] Could not create tracefs 'trace_pipe_raw' entry
[ 0.534926] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534927] Could not create tracefs 'stats' entry
[ 0.534927] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534928] Could not create tracefs 'buffer_size_kb' entry
[ 0.534928] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534929] Could not create tracefs 'snapshot' entry
[ 0.534930] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534930] Could not create tracefs 'snapshot_raw' entry
[ 0.534931] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534931] Could not create tracefs 'set_ftrace_pid' entry
[ 0.534932] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534933] Could not create tracefs 'available_filter_functions' entry
[ 0.534934] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534934] Could not create tracefs 'enabled_functions' entry
[ 0.534935] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534936] Could not create tracefs 'set_ftrace_filter' entry
[ 0.534936] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534937] Could not create tracefs 'set_ftrace_notrace' entry
[ 0.534937] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534938] Could not create tracefs 'set_graph_function' entry
[ 0.534939] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534939] Could not create tracefs 'set_graph_notrace' entry
[ 0.534942] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.534943] ------------[ cut here ]------------
[ 0.534944] Could not register function stat for cpu 0
--
[ 0.535004] ret_from_fork+0x35/0x40
[ 0.535008] ---[ end trace a9f51a1c2b8afb59 ]---
[ 0.535008] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.535008] Could not create tracefs 'tracing_thresh' entry
[ 0.535008] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.535008] Could not create tracefs 'README' entry
[ 0.535008] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.535008] Could not create tracefs 'saved_cmdlines' entry
[ 0.535008] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.535008] Could not create tracefs 'saved_cmdlines_size' entry
[ 0.535008] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.535008] Could not create tracefs 'saved_tgids' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'dyn_ftrace_total_info' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'funcgraph-overrun' entry
[ 0.536594] ------------[ cut here ]------------
--
[ 0.536594] ret_from_fork+0x35/0x40
[ 0.536594] ---[ end trace a9f51a1c2b8afb5a ]---
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'funcgraph-cpu' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'funcgraph-overhead' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'funcgraph-proc' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'funcgraph-duration' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'funcgraph-abstime' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'funcgraph-irqs' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'funcgraph-tail' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'sleep-time' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'graph-time' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'func_stack_trace' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'test_nop_accept' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'test_nop_refuse' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'printk_formats' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'max_graph_depth' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'synthetic_events' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] trace_kprobe: Could not create tracefs 'kprobe_events' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] trace_kprobe: Could not create tracefs 'kprobe_profile' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'dynamic_events' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'uprobe_events' entry
[ 0.536594] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.536594] Could not create tracefs 'uprobe_profile' entry
[ 0.536594] *** VALIDATE bpf ***
--
[ 0.820588] caller snb_uncore_imc_init_box+0x6c/0xb0 mapping multiple BARs
[ 0.820865] check: Scanning for low memory corruption every 60 seconds
[ 0.823207] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.823208] Could not create tracefs 'stack_max_size' entry
[ 0.823209] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.823209] Could not create tracefs 'stack_trace' entry
[ 0.823210] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.823211] Could not create tracefs 'stack_trace_filter' entry
[ 0.823217] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.823218] Could not create tracefs 'blk_classic' entry
[ 0.823218] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.823219] Could not create tracefs 'blk_cgroup' entry
[ 0.823220] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.823220] Could not create tracefs 'blk_cgname' entry
[ 0.823436] Initialise system trusted keyrings
--
[ 0.952067] sched_clock: Marking stable (951207778, 849693)->(1034265626, -82208155)
[ 0.952144] registered taskstats version 1
[ 0.952149] Lockdown: swapper/0: use of tracefs is restricted; see man kernel_lockdown.7
[ 0.952154] Loading compiled-in X.509 certificates
[ 0.953366] Loaded X.509 cert 'Build time autogenerated kernel key: b859a3f0d1fb97c048eb1e12333684e1db3073ca'
--
[ 1.001913] tty ttyS1: hash matches
[ 1.002134] rtc_cmos 00:04: setting system clock to 2020-02-06T20:44:21 UTC (1581021861)
[ 1.002371] Lockdown: swapper/0: hibernation is restricted; see man kernel_lockdown.7
[ 1.003280] Freeing unused decrypted memory: 2040K
[ 1.003638] Freeing unused kernel image memory: 2680K
--
[ 71.456989] systemd[1]: Detected architecture x86-64.
[ 71.473620] systemd[1]: Set hostname to <millbarge>.
[ 71.475128] Lockdown: systemd: /dev/mem,kmem,port is restricted; see man kernel_lockdown.7
[ 71.583229] systemd[1]: /lib/systemd/system/dbus.socket:5: ListenStream= references a path below legacy directory /var/run/, updating /var/run/dbus/system_bus_socket → /run/dbus/system_bus_socket; please update the unit file accordingly.
[ 71.592395] systemd[1]: /lib/systemd/system/virtlogd.socket:6: ListenStream= references a path below legacy directory /var/run/, updating /var/run/libvirt/virtlogd-sock → /run/libvirt/virtlogd-sock; please update the unit file accordingly.
--
[ 72.994080] audit: type=1400 audit(1581021933.486:11): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/tcpdump" pid=2420 comm="apparmor_parser"
[ 73.080322] Adding 2097148k swap on /dev/zd0. Priority:-2 extents:1 across:2097148k SSDscFS
[ 73.791076] Lockdown: rasdaemon: use of tracefs is restricted; see man kernel_lockdown.7
[ 73.791078] Could not create tracefs 'set_event' entry
[ 73.793322] Lockdown: rasdaemon: use of tracefs is restricted; see man kernel_lockdown.7
[ 73.793324] Could not create tracefs 'set_event' entry
[ 73.812049] Lockdown: rasdaemon: use of tracefs is restricted; see man kernel_lockdown.7
[ 73.812050] Could not create tracefs 'set_event' entry
[ 73.887930] Bluetooth: hci0: Waiting for firmware download to complete
--
[ 73.900884] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-12-16.ddc
[ 73.903619] Bluetooth: hci0: Applying Intel DDC parameters completed
[ 74.166659] Lockdown: Xorg: raw io port access is restricted; see man kernel_lockdown.7
[ 75.423231] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 75.424155] virbr0: port 1(virbr0-nic) entered blocking state
--
[ 75.878990] virbr0: port 1(virbr0-nic) entered listening state
[ 75.932525] virbr0: port 1(virbr0-nic) entered disabled state
[ 76.013277] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
[ 76.015903] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
[ 76.016454] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
[ 77.672659] drm: not enough stolen space for compressed buffer (need 36864000 more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.
[ 78.458791] e1000e: enp0s31f6 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
#
Thanks
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: perf-tools-unstable 1.0.1~20200130+git49b8cdf-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-12.15-generic 5.4.8
Uname: Linux 5.4.0-12-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu16
Architecture: amd64
Date: Tue Feb 11 00:57:36 2020
Dependencies:
PackageArchitecture: all
ProcEnviron:
TERM=rxvt-unicode-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: perf-tools-unstable
UpgradeStatus: Upgraded to focal on 2020-01-24 (17 days ago)
---
ProblemType: Bug
AlsaVersion: Advanced Linux Sound Architecture Driver Version k5.4.0-12-generic.
ApportVersion: 2.20.11-0ubuntu16
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: sarnold 4492 F.... pulseaudio
/dev/snd/controlC0: sarnold 4492 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0x2fe1028000 irq 146'
Mixer name : 'Realtek ALC285'
Components : 'HDA:10ec0285,17aa225c,00100002 HDA:8086280b,80860101,00100000'
Controls : 53
Simple ctrls : 15
Card1.Amixer.info:
Card hw:1 'Audio'/'Generic ThinkPad Dock USB Audio at usb-0000:00:14.0-4.2.4, high speed'
Mixer name : 'USB Mixer'
Components : 'USB17ef:306f'
Controls : 9
Simple ctrls : 4
Dependencies:
DistroRelease: Ubuntu 20.04
HibernationDevice: RESUME=none
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
MachineType: LENOVO 20KHCTO1WW
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
Package: perf-tools-unstable 1.0.1~20200130+git49b8cdf-1ubuntu1
PackageArchitecture: all
ProcEnviron:
TERM=rxvt-unicode-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu@/vmlinuz-5.4.0-12-generic root=ZFS=rpool/ROOT/ubuntu ro root=ZFS=rpool/ROOT/ubuntu quiet splash acpi_osi=! "acpi_osi=Windows 2015" cgroup_disable=memory vt.handoff=1
ProcVersionSignature: Ubuntu 5.4.0-12.15-generic 5.4.8
RelatedPackageVersions:
linux-restricted-modules-5.4.0-12-generic N/A
linux-backports-modules-5.4.0-12-generic N/A
linux-firmware 1.186
Tags: focal
Uname: Linux 5.4.0-12-generic x86_64
UpgradeStatus: Upgraded to focal on 2020-01-24 (17 days ago)
UserGroups: adm cdrom libvirt lpadmin plugdev sambashare sbuild sudo
_MarkForUpload: True
dmi.bios.date: 11/25/2019
dmi.bios.vendor: LENOVO
dmi.bios.version: N23ET69W (1.44 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20KHCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN23ET69W(1.44):bd11/25/2019:svnLENOVO:pn20KHCTO1WW:pvrThinkPadX1Carbon6th:rvnLENOVO:rn20KHCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad X1 Carbon 6th
dmi.product.name: 20KHCTO1WW
dmi.product.sku: LENOVO_MT_20KH_BU_Think_FM_ThinkPad X1 Carbon 6th
dmi.product.version: ThinkPad X1 Carbon 6th
dmi.sys.vendor: LENOVO
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1862708
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.