linux-kernel - Re: [linux-next:master] [perf test subcmd help] ef92c4351e: kmsg.sanitizer.indirect_leak/malloc/___interceptor_backtrace/child_test_sig

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Message-ID: <CAP-5=fVPGoh7cf167rSU-5hfC+aQBkHa2=_Pq-1BE9KFMsOasQ@mail.gmail.com>
Date: Fri, 23 Jan 2026 08:05:55 -0800
From: Ian Rogers <irogers@...gle.com>
To: Oliver Sang <oliver.sang@...el.com>
Cc: Thomas Richter <tmricht@...ux.ibm.com>, oe-lkp@...ts.linux.dev, lkp@...el.com, 
	Arnaldo Carvalho de Melo <acme@...hat.com>, Sri Jayaramappa <sjayaram@...mai.com>, 
	Adrian Hunter <adrian.hunter@...el.com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Guilherme Amadio <amadio@...too.org>, 
	Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Peter Zijlstra <peterz@...radead.org>, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [linux-next:master] [perf test subcmd help] ef92c4351e: kmsg.sanitizer.indirect_leak/malloc/___interceptor_backtrace/child_test_sig_handler/raise/abort

On Thu, Jan 22, 2026 at 10:18 PM Oliver Sang <oliver.sang@...el.com> wrote:
>
>
> hi, Ian Rogers,
>
>
> On Wed, Jan 21, 2026 at 07:52:15AM -0800, Ian Rogers wrote:
>
> [...]
>
> > >     #20 0x55f34aa28241 in _start perf[102f241]
> >
> > I believe this is resolved by:
> > https://lore.kernel.org/lkml/20260121082402.2311962-1-tmricht@linux.ibm.com/
> >
> > > =================================================================
> > > ==11710==ERROR: LeakSanitizer: detected memory leaks
> > >
> > > Direct leak of 30952 byte(s) in 3 object(s) allocated from:
> > >     #0 0x7f7688ced610 in calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
> > >     #1 0x7f7688ace808  (/lib/x86_64-linux-gnu/libelf.so.1+0x3808) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
> > >
> > > Indirect leak of 9280 byte(s) in 3 object(s) allocated from:
> > >     #0 0x7f7688cedc57 in malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
> > >     #1 0x7f7688ad6550  (/lib/x86_64-linux-gnu/libelf.so.1+0xb550) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
> > >
> > > Indirect leak of 1873 byte(s) in 3 object(s) allocated from:
> > >     #0 0x7f7688cedc57 in malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
> > >     #1 0x7f7688ad73fa  (/lib/x86_64-linux-gnu/libelf.so.1+0xc3fa) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
> > >
> > > SUMMARY: AddressSanitizer: 42105 byte(s) leaked in 9 allocation(s).
> > >  68.4: Exclude disjoint subcmd names                                 : FAILED!
> >
> > To better diagnose these leaks could you disable the fast asan stack unwinder:
> > ASAN_OPTIONS=fast_unwind_on_malloc=0
>
> thanks a lot for guidance!
>
> we've made the change according, now see results like below [1]
>
> we will supply these information in future reports. thanks again!

That's for the update, and that's great news! The reports are really
useful so a great win-win.

>
> [1]
>
> =================================================================
> ==11725==ERROR: LeakSanitizer: detected memory leaks
>
> Direct leak of 30952 byte(s) in 3 object(s) allocated from:
>     #0 0x7fed49fb4610 in calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
>     #1 0x7fed49d95808  (/lib/x86_64-linux-gnu/libelf.so.1+0x3808) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
>     #2 0x7fed49d965f9  (/lib/x86_64-linux-gnu/libelf.so.1+0x45f9) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
>     #3 0x55dc6825e4f7 in symsrc__init util/symbol-elf.c:1164

As the only direct leak this is key here. There's limited detail due
to the inlining but I believe this is the leak fixed here:
https://lore.kernel.org/lkml/20260117052849.2205545-2-irogers@google.com/
and is being carried in the perf-tools-next tree:
https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/commit/?h=perf-tools-next&id=92d65d9c31621befe0a5f7c0bd43bd217613c6b6
It has a fixes tag and so hopefully this means it will flow out nicely
but perhaps it is a candidate for v6.19 rc fixes PR.

Thanks,
Ian

>     #4 0x55dc67ddba50 in dso__load util/symbol.c:1795
>     #5 0x55dc67e6fa86 in map__load util/map.c:351
>     #6 0x55dc67e6fe6d in map__find_symbol util/map.c:385
>     #7 0x55dc67e4480a in __dump_stack util/debug.c:343
>     #8 0x55dc67ad0c84 in child_test_sig_handler tests/builtin-test.c:313
>     #9 0x7fed3fcf2def  (/lib/x86_64-linux-gnu/libc.so.6+0x3fdef) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #10 0x7fed3fd4795b  (/lib/x86_64-linux-gnu/libc.so.6+0x9495b) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #11 0x7fed3fcf2cc1 in gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x3fcc1) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #12 0x7fed3fcdb4ab in abort (/lib/x86_64-linux-gnu/libc.so.6+0x284ab) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #13 0x7fed3fcdb41f  (/lib/x86_64-linux-gnu/libc.so.6+0x2841f) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #14 0x55dc67a0ee6f in exclude_cmds /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/lib/subcmd/help.c:107
>     #15 0x55dc67bb4645 in test__exclude_cmdnames_no_overlap tests/subcmd-help.c:110
>     #16 0x55dc67ad14c4 in run_test_child tests/builtin-test.c:340
>     #17 0x55dc67a22db2 in start_command /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/lib/subcmd/run-command.c:128
>     #18 0x55dc67ad39a0 in start_test tests/builtin-test.c:545
>     #19 0x55dc67ad490c in __cmd_test tests/builtin-test.c:648
>     #20 0x55dc67ad72bf in cmd_test tests/builtin-test.c:850
>     #21 0x55dc679dca44 in run_builtin /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:349
>     #22 0x55dc679dd335 in handle_internal_command /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:401
>     #23 0x55dc679dd88b in run_argv /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:445
>     #24 0x55dc679de032 in main /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:553
>     #25 0x7fed3fcdcca7  (/lib/x86_64-linux-gnu/libc.so.6+0x29ca7) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #26 0x7fed3fcdcd64 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29d64) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #27 0x55dc67742240 in _start (/usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf+0x102f240) (BuildId: b8c98ab0747f9f1fe41a64089a7488f7aedbc9d8)
>
> Indirect leak of 9280 byte(s) in 3 object(s) allocated from:
>     #0 0x7fed49fb4c57 in malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
>     #1 0x7fed49d9d550  (/lib/x86_64-linux-gnu/libelf.so.1+0xb550) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
>     #2 0x7fed49d9e517  (/lib/x86_64-linux-gnu/libelf.so.1+0xc517) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
>     #3 0x7fed49d9e0b1 in elf_rawdata (/lib/x86_64-linux-gnu/libelf.so.1+0xc0b1) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
>     #4 0x55dc68254770 in elf_section_by_name util/symbol-elf.c:193
>     #5 0x55dc6825d641 in read_gnu_debugdata util/symbol-elf.c:1086
>     #6 0x55dc6825e625 in symsrc__init util/symbol-elf.c:1173
>     #7 0x55dc67ddba50 in dso__load util/symbol.c:1795
>     #8 0x55dc67e6fa86 in map__load util/map.c:351
>     #9 0x55dc67e6fe6d in map__find_symbol util/map.c:385
>     #10 0x55dc67e4480a in __dump_stack util/debug.c:343
>     #11 0x55dc67ad0c84 in child_test_sig_handler tests/builtin-test.c:313
>     #12 0x7fed3fcf2def  (/lib/x86_64-linux-gnu/libc.so.6+0x3fdef) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #13 0x7fed3fd4795b  (/lib/x86_64-linux-gnu/libc.so.6+0x9495b) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #14 0x7fed3fcf2cc1 in gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x3fcc1) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #15 0x7fed3fcdb4ab in abort (/lib/x86_64-linux-gnu/libc.so.6+0x284ab) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #16 0x7fed3fcdb41f  (/lib/x86_64-linux-gnu/libc.so.6+0x2841f) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #17 0x55dc67a0ee6f in exclude_cmds /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/lib/subcmd/help.c:107
>     #18 0x55dc67bb4645 in test__exclude_cmdnames_no_overlap tests/subcmd-help.c:110
>     #19 0x55dc67ad14c4 in run_test_child tests/builtin-test.c:340
>     #20 0x55dc67a22db2 in start_command /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/lib/subcmd/run-command.c:128
>     #21 0x55dc67ad39a0 in start_test tests/builtin-test.c:545
>     #22 0x55dc67ad490c in __cmd_test tests/builtin-test.c:648
>     #23 0x55dc67ad72bf in cmd_test tests/builtin-test.c:850
>     #24 0x55dc679dca44 in run_builtin /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:349
>     #25 0x55dc679dd335 in handle_internal_command /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:401
>     #26 0x55dc679dd88b in run_argv /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:445
>     #27 0x55dc679de032 in main /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:553
>
> Indirect leak of 1873 byte(s) in 3 object(s) allocated from:
>     #0 0x7fed49fb4c57 in malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69
>     #1 0x7fed49d9e3fa  (/lib/x86_64-linux-gnu/libelf.so.1+0xc3fa) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
>     #2 0x7fed49d9e0b1 in elf_rawdata (/lib/x86_64-linux-gnu/libelf.so.1+0xc0b1) (BuildId: d6a40be9eadcbcb0562b7bb13bbe81166e82cc40)
>     #3 0x55dc68254770 in elf_section_by_name util/symbol-elf.c:193
>     #4 0x55dc6825d641 in read_gnu_debugdata util/symbol-elf.c:1086
>     #5 0x55dc6825e625 in symsrc__init util/symbol-elf.c:1173
>     #6 0x55dc67ddba50 in dso__load util/symbol.c:1795
>     #7 0x55dc67e6fa86 in map__load util/map.c:351
>     #8 0x55dc67e6fe6d in map__find_symbol util/map.c:385
>     #9 0x55dc67e4480a in __dump_stack util/debug.c:343
>     #10 0x55dc67ad0c84 in child_test_sig_handler tests/builtin-test.c:313
>     #11 0x7fed3fcf2def  (/lib/x86_64-linux-gnu/libc.so.6+0x3fdef) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #12 0x7fed3fd4795b  (/lib/x86_64-linux-gnu/libc.so.6+0x9495b) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #13 0x7fed3fcf2cc1 in gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x3fcc1) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #14 0x7fed3fcdb4ab in abort (/lib/x86_64-linux-gnu/libc.so.6+0x284ab) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #15 0x7fed3fcdb41f  (/lib/x86_64-linux-gnu/libc.so.6+0x2841f) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>     #16 0x55dc67a0ee6f in exclude_cmds /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/lib/subcmd/help.c:107
>     #17 0x55dc67bb4645 in test__exclude_cmdnames_no_overlap tests/subcmd-help.c:110
>     #18 0x55dc67ad14c4 in run_test_child tests/builtin-test.c:340
>     #19 0x55dc67a22db2 in start_command /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/lib/subcmd/run-command.c:128
>     #20 0x55dc67ad39a0 in start_test tests/builtin-test.c:545
>     #21 0x55dc67ad490c in __cmd_test tests/builtin-test.c:648
>     #22 0x55dc67ad72bf in cmd_test tests/builtin-test.c:850
>     #23 0x55dc679dca44 in run_builtin /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:349
>     #24 0x55dc679dd335 in handle_internal_command /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:401
>     #25 0x55dc679dd88b in run_argv /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:445
>     #26 0x55dc679de032 in main /usr/src/perf_selftests-x86_64-rhel-9.4-bpf-ef92c4351ec75bcfb8a1cc3a88109b5339f296ef/tools/perf/perf.c:553
>     #27 0x7fed3fcdcca7  (/lib/x86_64-linux-gnu/libc.so.6+0x29ca7) (BuildId: def5460e3cee00bfee25b429c97bcc4853e5b3a8)
>
> SUMMARY: AddressSanitizer: 42105 byte(s) leaked in 9 allocation(s).
>  68.4: Exclude disjoint subcmd names                                 : FAILED!
>
> >
> > Thanks,
> > Ian
> >
> > > The kernel config and materials to reproduce are available at:
> > > https://download.01.org/0day-ci/archive/20260120/202601201519.ce4c3ab3-lkp@intel.com
> > >
> > >
> > >
> > > --
> > > 0-DAY CI Kernel Test Service
> > > https://github.com/intel/lkp-tests/wiki
> > >