Re: [linus:master] [perf test] c9cd0c7e52: perf-sanity-tests.python_profiling_with_jitdump.fail
From: Namhyung Kim
Date: Fri Feb 27 2026 - 16:40:13 EST
On Fri, Feb 27, 2026 at 04:42:59PM +0800, kernel test robot wrote:
>
>
> Hello,
>
>
> we failed to run this new added test. not sure if we miss any dependencies?
>
>
> below is full report FYI.
>
>
> kernel test robot noticed "perf-sanity-tests.python_profiling_with_jitdump.fail" on:
>
> commit: c9cd0c7e529e80e9be79867d2ebb874f67dbc35e ("perf test: Add python JIT dump test")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
> in testcase: perf-sanity-tests
> version:
> with following parameters:
>
> perf_compiler: clang
> group: group-02
>
>
> config: x86_64-rhel-9.4-bpf
> compiler: gcc-14
> test machine: 16 threads Intel(R) Core(TM) i7-13620H (Raptor Lake) with 32G memory
>
> (please refer to attached dmesg/kmsg for entire log/backtrace)
>
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
> | Closes: https://lore.kernel.org/oe-lkp/202602270932.50ed0a9f-lkp@xxxxxxxxx
Looks like a reference leak to map during libdw unwinding.
Ian, can you please take a look?
Thanks,
Namhyung
>
>
> 2026-01-26 15:25:04 sudo ASAN_OPTIONS=fast_unwind_on_malloc=0 /usr/src/linux-perf-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/perf test 84 -v
> 84: python profiling with jitdump : Running (1 active)
> --- start ---
> test child forked, pid 12390
> Run python with -Xperf_jit
> [ perf record: Woken up 5 times to write data ]
> =================================================================
> ==12400==ERROR: AddressSanitizer: heap-use-after-free on address 0x50200002ba30 at pc 0x55c306993987 bp 0x7ffd98998720 sp 0x7ffd98998718
> READ of size 8 at 0x50200002ba30 thread T0
> #0 0x55c306993986 in map__start util/map.h:54
> #1 0x55c306993cd0 in map__dso_map_ip util/map.h:110
> #2 0x55c3069b1ecb in unwind_entry util/machine.c:2950
> #3 0x55c306e4197b in unwind__get_entries util/unwind-libdw.c:321
> #4 0x55c3069b2398 in thread__resolve_callchain_unwind util/machine.c:2976
> #5 0x55c3069b24ec in __thread__resolve_callchain util/machine.c:3003
> #6 0x55c306987e78 in sample__for_each_callchain_node util/callchain.c:1808
> #7 0x55c3067d4ece in build_id__mark_dso_hit util/build-id.c:77
> #8 0x55c3062f7004 in process_sample_event /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/builtin-record.c:1504
> #9 0x55c3069dbec3 in evlist__deliver_sample util/session.c:1259
> #10 0x55c3069dc425 in machines__deliver_event util/session.c:1299
> #11 0x55c3069de009 in perf_session__deliver_event util/session.c:1386
> #12 0x55c3069cb296 in ordered_events__deliver_event util/session.c:134
> #13 0x55c306a06aac in do_flush util/ordered-events.c:245
> #14 0x55c306a07951 in __ordered_events__flush util/ordered-events.c:324
> #15 0x55c306a07e62 in ordered_events__flush util/ordered-events.c:342
> #16 0x55c3069d6863 in perf_event__process_finished_round util/session.c:786
> #17 0x55c3069deb7e in perf_session__process_user_event util/session.c:1446
> #18 0x55c3069e190e in perf_session__process_event util/session.c:1668
> #19 0x55c3069e9198 in process_simple util/session.c:2259
> #20 0x55c3069e8158 in reader__read_event util/session.c:2188
> #21 0x55c3069e8afe in reader__process_events util/session.c:2237
> #22 0x55c3069e9987 in __perf_session__process_events util/session.c:2282
> #23 0x55c3069eca43 in perf_session__process_events util/session.c:2446
> #24 0x55c3062f7328 in process_buildids /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/builtin-record.c:1534
> #25 0x55c3062fbdf0 in record__finish_output /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/builtin-record.c:1858
> #26 0x55c306309ebf in __cmd_record /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/builtin-record.c:2930
> #27 0x55c306317a8f in cmd_record /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/builtin-record.c:4417
> #28 0x55c30652bf7b in run_builtin /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/perf.c:349
> #29 0x55c30652c86c in handle_internal_command /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/perf.c:401
> #30 0x55c30652cdc2 in run_argv /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/perf.c:445
> #31 0x55c30652d569 in main /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/perf.c:553
> #32 0x7f026b873ca7 (/lib/x86_64-linux-gnu/libc.so.6+0x29ca7) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
> #33 0x7f026b873d64 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29d64) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
> #34 0x55c306293210 in _start (/usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/perf+0x1023210) (BuildId: 47c1eede4a6cf8e0c379d2104e8b035638daa1b4)
>
> 0x50200002ba30 is located 0 bytes inside of 8-byte region [0x50200002ba30,0x50200002ba38)
> freed by thread T0 here:
> #0 0x7f0275b3d8f8 in free ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:52
> #1 0x55c3069ba258 in map__put util/map.c:312
> #2 0x55c30679b7f8 in __map__zput util/map.h:198
> #3 0x55c30679c0df in addr_location__exit util/addr_location.c:31
> #4 0x55c306e3f7fe in entry util/unwind-libdw.c:147
> #5 0x55c306e40b1b in frame_callback util/unwind-libdw.c:259
> #6 0x7f02758daae2 in dwfl_thread_getframes (/lib/x86_64-linux-gnu/libdw.so.1+0x78ae2) (BuildId: bafe9cb5bbbe6cee778d0d137730ea5c223d553e)
> #7 0x7f02758dae53 in dwfl_getthread_frames (/lib/x86_64-linux-gnu/libdw.so.1+0x78e53) (BuildId: bafe9cb5bbbe6cee778d0d137730ea5c223d553e)
> #8 0x55c306e414af in unwind__get_entries util/unwind-libdw.c:307
> #9 0x55c3069b2398 in thread__resolve_callchain_unwind util/machine.c:2976
> #10 0x55c3069b24ec in __thread__resolve_callchain util/machine.c:3003
> #11 0x55c306987e78 in sample__for_each_callchain_node util/callchain.c:1808
> #12 0x55c3067d4ece in build_id__mark_dso_hit util/build-id.c:77
> #13 0x55c3062f7004 in process_sample_event /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/builtin-record.c:1504
> #14 0x55c3069dbec3 in evlist__deliver_sample util/session.c:1259
> #15 0x55c3069dc425 in machines__deliver_event util/session.c:1299
> #16 0x55c3069de009 in perf_session__deliver_event util/session.c:1386
> #17 0x55c3069cb296 in ordered_events__deliver_event util/session.c:134
> #18 0x55c306a06aac in do_flush util/ordered-events.c:245
> #19 0x55c306a07951 in __ordered_events__flush util/ordered-events.c:324
> #20 0x55c306a07e62 in ordered_events__flush util/ordered-events.c:342
> #21 0x55c3069d6863 in perf_event__process_finished_round util/session.c:786
> #22 0x55c3069deb7e in perf_session__process_user_event util/session.c:1446
> #23 0x55c3069e190e in perf_session__process_event util/session.c:1668
> #24 0x55c3069e9198 in process_simple util/session.c:2259
> #25 0x55c3069e8158 in reader__read_event util/session.c:2188
> #26 0x55c3069e8afe in reader__process_events util/session.c:2237
> #27 0x55c3069e9987 in __perf_session__process_events util/session.c:2282
>
> previously allocated by thread T0 here:
> #0 0x7f0275b3ec57 in malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
> #1 0x55c3069bd747 in map__get util/map.h:188
> #2 0x55c3069c72c4 in maps__find util/maps.c:1112
> #3 0x55c30683b979 in thread__find_map util/event.c:687
> #4 0x55c30683be37 in thread__find_symbol util/event.c:723
> #5 0x55c306e3e7c3 in __report_module util/unwind-libdw.c:54
> #6 0x55c306e3f428 in entry util/unwind-libdw.c:133
> #7 0x55c306e40b1b in frame_callback util/unwind-libdw.c:259
> #8 0x7f02758daae2 in dwfl_thread_getframes (/lib/x86_64-linux-gnu/libdw.so.1+0x78ae2) (BuildId: bafe9cb5bbbe6cee778d0d137730ea5c223d553e)
> #9 0x7f02758dae53 in dwfl_getthread_frames (/lib/x86_64-linux-gnu/libdw.so.1+0x78e53) (BuildId: bafe9cb5bbbe6cee778d0d137730ea5c223d553e)
> #10 0x55c306e414af in unwind__get_entries util/unwind-libdw.c:307
> #11 0x55c3069b2398 in thread__resolve_callchain_unwind util/machine.c:2976
> #12 0x55c3069b24ec in __thread__resolve_callchain util/machine.c:3003
> #13 0x55c306987e78 in sample__for_each_callchain_node util/callchain.c:1808
> #14 0x55c3067d4ece in build_id__mark_dso_hit util/build-id.c:77
> #15 0x55c3062f7004 in process_sample_event /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-c9cd0c7e529e80e9be79867d2ebb874f67dbc35e/tools/perf/builtin-record.c:1504
> #16 0x55c3069dbec3 in evlist__deliver_sample util/session.c:1259
> #17 0x55c3069dc425 in machines__deliver_event util/session.c:1299
> #18 0x55c3069de009 in perf_session__deliver_event util/session.c:1386
> #19 0x55c3069cb296 in ordered_events__deliver_event util/session.c:134
> #20 0x55c306a06aac in do_flush util/ordered-events.c:245
> #21 0x55c306a07951 in __ordered_events__flush util/ordered-events.c:324
> #22 0x55c306a07e62 in ordered_events__flush util/ordered-events.c:342
> #23 0x55c3069d6863 in perf_event__process_finished_round util/session.c:786
> #24 0x55c3069deb7e in perf_session__process_user_event util/session.c:1446
> #25 0x55c3069e190e in perf_session__process_event util/session.c:1668
> #26 0x55c3069e9198 in process_simple util/session.c:2259
> #27 0x55c3069e8158 in reader__read_event util/session.c:2188
>
> SUMMARY: AddressSanitizer: heap-use-after-free util/map.h:54 in map__start
> Shadow bytes around the buggy address:
> 0x50200002b780: fa fa fd fa fa fa fd fd fa fa 00 06 fa fa 00 fa
> 0x50200002b800: fa fa 00 fa fa fa fd fa fa fa 00 fa fa fa 00 fa
> 0x50200002b880: fa fa 00 fa fa fa fd fa fa fa fd fa fa fa fd fa
> 0x50200002b900: fa fa fd fa fa fa fd fa fa fa fd fa fa fa fd fa
> 0x50200002b980: fa fa fd fa fa fa fd fa fa fa fd fa fa fa fd fa
> =>0x50200002ba00: fa fa fd fa fa fa[fd]fa fa fa fd fa fa fa fd fa
> 0x50200002ba80: fa fa fd fa fa fa fd fa fa fa fd fa fa fa fd fa
> 0x50200002bb00: fa fa fd fa fa fa fd fa fa fa fd fa fa fa fd fa
> 0x50200002bb80: fa fa fd fa fa fa fd fa fa fa fd fa fa fa fd fa
> 0x50200002bc00: fa fa fd fa fa fa fd fa fa fa fd fa fa fa fd fa
> 0x50200002bc80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
> Shadow byte legend (one shadow byte represents 8 application bytes):
> Addressable: 00
> Partially addressable: 01 02 03 04 05 06 07
> Heap left redzone: fa
> Freed heap region: fd
> Stack left redzone: f1
> Stack mid redzone: f2
> Stack right redzone: f3
> Stack after return: f5
> Stack use after scope: f8
> Global redzone: f9
> Global init order: f6
> Poisoned by user: f7
> Container overflow: fc
> Array cookie: ac
> Intra object redzone: bb
> ASan internal: fe
> Left alloca redzone: ca
> Right alloca redzone: cb
> ==12400==ABORTING
> Error:
> failed to process sample
> Generate JIT-ed DSOs using perf inject
> WARNING: The /tmp/__perf_test.perf.data.W1jHYt file's data size field is 0 which is unexpected.
> Was the 'perf record' command properly terminated?
> Add JIT-ed DSOs to the build-ID cache
> Couldn't add /tmp/jitted--*.so: No such file or directory
> Check the symbol containing the function/module name
> zero-sized data (/tmp/__perf_test.perf.data.W1jHYt.jit), nothing to do!
> Found 0 matching lines
> Remove JIT-ed DSOs from the build-ID cache
> Cleaning up files...
> ---- end(-1) ----
> 84: python profiling with jitdump : FAILED!
>
>
>
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20260227/202602270932.50ed0a9f-lkp@xxxxxxxxx
>
>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>