[linus:master] [selftests/proc] ca5480fb53: kselftests.proc.proc-maps-race.fail

From: kernel test robot

Date: Tue Oct 27 2026 - 08:41:19 EST

Hello,

kernel test robot noticed "kselftests.proc.proc-maps-race.fail" on:

commit: ca5480fb53fa73cb5816b696b103826daedab1ca ("selftests/proc: add /proc/pid/smaps_rollup tearing tests") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linux-next/master f1ac44c32cba88ad65dcecd4a279661d14e93651]

in testcase: kselftests
version: kselftests-x86_64-d6d3455d8751-1_20261013
with following parameters:

group: proc

config: x86_64-rhel-9.4-kselftests
compiler: gcc-14
test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-9980XE CPU @ 3.00GHz (Skylake) 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 <yi1.lai@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202610271934.fd287c3f-lkp@xxxxxxxxx

KERNEL SELFTESTS: linux_headers_dir is /usr/src/linux-headers-x86_64-rhel-9.4-kselftests-ca5480fb53fa73cb5816b696b103826daedab1ca
2026-10-26 14:37:46 sed -i s/default_timeout=45/default_timeout=300/ kselftest/runner.sh
2026-10-26 14:37:46 make -j36 TARGETS=proc run_tests
CC fd-001-lookup
CC fd-002-posix-eq
CC fd-003-kthread
CC proc-2-is-kthread
CC proc-loadavg-001
CC proc-maps-race
CC proc-net-dev-lseek
CC proc-empty-vm
CC proc-self-map-files-001
CC proc-pid-vm
CC proc-self-map-files-002
CC proc-self-isnt-kthread
CC proc-self-syscall
CC proc-self-wchan
CC proc-subset-pid
CC proc-uptime-001
CC proc-uptime-002
CC read
CC proc-tid0
CC self
CC setns-dcache
CC setns-sysvipc
CC thread-self
CC proc-multiple-procfs
CC proc-fsconfig-hidepid
CC proc-pidns
# timeout set to 300
# selftests: proc: fd-001-lookup
ok 1 selftests: proc: fd-001-lookup
# timeout set to 300
# selftests: proc: fd-002-posix-eq
ok 2 selftests: proc: fd-002-posix-eq
# timeout set to 300
# selftests: proc: fd-003-kthread
ok 3 selftests: proc: fd-003-kthread
# timeout set to 300
# selftests: proc: proc-2-is-kthread
ok 4 selftests: proc: proc-2-is-kthread
# timeout set to 300
# selftests: proc: proc-loadavg-001
ok 5 selftests: proc: proc-loadavg-001
# timeout set to 300
# selftests: proc: proc-maps-race
# TAP version 13
# 1..6
# # Starting 6 tests from 2 test cases.
# # RUN proc_maps_race.maps.test_maps_tearing_from_split ...
# # OK proc_maps_race.maps.test_maps_tearing_from_split
# ok 1 proc_maps_race.maps.test_maps_tearing_from_split
# # RUN proc_maps_race.maps.test_maps_tearing_from_resize ...
# # OK proc_maps_race.maps.test_maps_tearing_from_resize
# ok 2 proc_maps_race.maps.test_maps_tearing_from_resize
# # RUN proc_maps_race.maps.test_maps_tearing_from_remap ...
# # OK proc_maps_race.maps.test_maps_tearing_from_remap
# ok 3 proc_maps_race.maps.test_maps_tearing_from_remap
# # RUN proc_maps_race.smaps.test_maps_tearing_from_split ...
# Expected stats: Rss 892 kB
# Pss 82 kB
# Pss_Dirty 82 kB
# Pss_Anon 54 kB
# Pss_File 24 kB
# Pss_Shmem 3 kB
# Shared_Clean 0 kB
# Shared_Dirty 860 kB
# Private_Clean 0 kB
# Private_Dirty 32 kB
# Referenced 892 kB
# Anonymous 120 kB
# KSM 0 kB
# LazyFree 0 kB
# AnonHugePages 0 kB
# ShmemPmdMapped 0 kB
# FilePmdMapped 0 kB
# Shared_Hugetlb 0 kB
# Private_Hugetlb 0 kB
# Swap 0 kB
# SwapPss 0 kB
# Locked 0 kB
# Actual stats: Rss 892 kB
# Pss 81 kB
# Pss_Dirty 81 kB
# Pss_Anon 54 kB
# Pss_File 24 kB
# Pss_Shmem 3 kB
# Shared_Clean 0 kB
# Shared_Dirty 860 kB
# Private_Clean 0 kB
# Private_Dirty 32 kB
# Referenced 892 kB
# Anonymous 120 kB
# KSM 0 kB
# LazyFree 0 kB
# AnonHugePages 0 kB
# ShmemPmdMapped 0 kB
# FilePmdMapped 0 kB
# Shared_Hugetlb 0 kB
# Private_Hugetlb 0 kB
# Swap 0 kB
# SwapPss 0 kB
# Locked 0 kB
# # proc-maps-race.c:961:test_maps_tearing_from_split:Expected 0 (0) != compare_smaps_rollup(self, &orig_stats, &stats) (0) # # test_maps_tearing_from_split: Test terminated by timeout
# # FAIL proc_maps_race.smaps.test_maps_tearing_from_split
# not ok 4 proc_maps_race.smaps.test_maps_tearing_from_split
# # RUN proc_maps_race.smaps.test_maps_tearing_from_resize ...
# Expected stats: Rss 956 kB
# Pss 83 kB
# Pss_Dirty 83 kB
# Pss_Anon 54 kB
# Pss_File 26 kB
# Pss_Shmem 3 kB
# Shared_Clean 0 kB
# Shared_Dirty 924 kB
# Private_Clean 0 kB
# Private_Dirty 32 kB
# Referenced 956 kB
# Anonymous 120 kB
# KSM 0 kB
# LazyFree 0 kB
# AnonHugePages 0 kB
# ShmemPmdMapped 0 kB
# FilePmdMapped 0 kB
# Shared_Hugetlb 0 kB
# Private_Hugetlb 0 kB
# Swap 0 kB
# SwapPss 0 kB
# Locked 0 kB
# Actual stats: Rss 956 kB
# Pss 83 kB
# Pss_Dirty 83 kB
# Pss_Anon 54 kB
# Pss_File 25 kB
# Pss_Shmem 3 kB
# Shared_Clean 0 kB
# Shared_Dirty 924 kB
# Private_Clean 0 kB
# Private_Dirty 32 kB
# Referenced 956 kB
# Anonymous 120 kB
# KSM 0 kB
# LazyFree 0 kB
# AnonHugePages 0 kB
# ShmemPmdMapped 0 kB
# FilePmdMapped 0 kB
# Shared_Hugetlb 0 kB
# Private_Hugetlb 0 kB
# Swap 0 kB
# SwapPss 0 kB
# Locked 0 kB
# # proc-maps-race.c:1050:test_maps_tearing_from_resize:Expected 0 (0) != compare_smaps_rollup(self, &orig_stats, &stats) (0) # # test_maps_tearing_from_resize: Test terminated by timeout
# # FAIL proc_maps_race.smaps.test_maps_tearing_from_resize
# not ok 5 proc_maps_race.smaps.test_maps_tearing_from_resize
# # RUN proc_maps_race.smaps.test_maps_tearing_from_remap ...
# Expected stats: Rss 956 kB
# Pss 84 kB
# Pss_Dirty 84 kB
# Pss_Anon 54 kB
# Pss_File 26 kB
# Pss_Shmem 3 kB
# Shared_Clean 0 kB
# Shared_Dirty 924 kB
# Private_Clean 0 kB
# Private_Dirty 32 kB
# Referenced 956 kB
# Anonymous 120 kB
# KSM 0 kB
# LazyFree 0 kB
# AnonHugePages 0 kB
# ShmemPmdMapped 0 kB
# FilePmdMapped 0 kB
# Shared_Hugetlb 0 kB
# Private_Hugetlb 0 kB
# Swap 0 kB
# SwapPss 0 kB
# Locked 0 kB
# Actual stats: Rss 956 kB
# Pss 83 kB
# Pss_Dirty 83 kB
# Pss_Anon 54 kB
# Pss_File 26 kB
# Pss_Shmem 3 kB
# Shared_Clean 0 kB
# Shared_Dirty 924 kB
# Private_Clean 0 kB
# Private_Dirty 32 kB
# Referenced 956 kB
# Anonymous 120 kB
# KSM 0 kB
# LazyFree 0 kB
# AnonHugePages 0 kB
# ShmemPmdMapped 0 kB
# FilePmdMapped 0 kB
# Shared_Hugetlb 0 kB
# Private_Hugetlb 0 kB
# Swap 0 kB
# SwapPss 0 kB
# Locked 0 kB
# # proc-maps-race.c:1141:test_maps_tearing_from_remap:Expected 0 (0) != compare_smaps_rollup(self, &orig_stats, &stats) (0) # # test_maps_tearing_from_remap: Test terminated by timeout
# # FAIL proc_maps_race.smaps.test_maps_tearing_from_remap
# not ok 6 proc_maps_race.smaps.test_maps_tearing_from_remap
# # FAILED: 3 / 6 tests passed.
# # Totals: pass:3 fail:3 xfail:0 xpass:0 skip:0 error:0 not ok 6 selftests: proc: proc-maps-race # exit=1 # timeout set to 300 # selftests: proc: proc-net-dev-lseek ok 7 selftests: proc: proc-net-dev-lseek # timeout set to 300 # selftests: proc: proc-empty-vm # protection_key_support: error: rv -1, errno 28 not ok 8 selftests: proc: proc-empty-vm # exit=1 # timeout set to 300 # selftests: proc: proc-pid-vm ok 9 selftests: proc: proc-pid-vm # timeout set to 300 # selftests: proc: proc-self-map-files-001 ok 10 selftests: proc: proc-self-map-files-001 # timeout set to 300 # selftests: proc: proc-self-map-files-002 ok 11 selftests: proc: proc-self-map-files-002 # timeout set to 300 # selftests: proc: proc-self-isnt-kthread ok 12 selftests: proc: proc-self-isnt-kthread # timeout set to 300 # selftests: proc: proc-self-syscall ok 13 selftests: proc: proc-self-syscall # timeout set to 300 # selftests: proc: proc-self-wchan ok 14 selftests: proc: proc-self-wchan # timeout set to 300 # selftests: proc: proc-subset-pid ok 15 selftests: proc: proc-subset-pid # timeout set to 300 # selftests: proc: proc-tid0 ok 16 selftests: proc: proc-tid0 # timeout set to 300 # selftests: proc: proc-uptime-001 ok 17 selftests: proc: proc-uptime-001 # timeout set to 300 # selftests: proc: proc-uptime-002 ok 18 selftests: proc: proc-uptime-002 # timeout set to 300 # selftests: proc: read ok 19 selftests: proc: read # timeout set to 300 # selftests: proc: self ok 20 selftests: proc: self # timeout set to 300 # selftests: proc: setns-dcache ok 21 selftests: proc: setns-dcache # timeout set to 300 # selftests: proc: setns-sysvipc ok 22 selftests: proc: setns-sysvipc # timeout set to 300 # selftests: proc: thread-self ok 23 selftests: proc: thread-self # timeout set to 300 # selftests: proc: proc-multiple-procfs ok 24 selftests: proc: proc-multiple-procfs # timeout set to 300 # selftests: proc: proc-fsconfig-hidepid ok 25 selftests: proc: proc-fsconfig-hidepid # timeout set to 300 # selftests: proc: proc-pidns # TAP version 13 # 1..6 # # Starting 6 tests from 1 test cases.
# # RUN ns.pidns_mount_string_path ...
# # OK ns.pidns_mount_string_path
# ok 1 ns.pidns_mount_string_path
# # RUN ns.pidns_fsconfig_string_path ...
# # OK ns.pidns_fsconfig_string_path
# ok 2 ns.pidns_fsconfig_string_path
# # RUN ns.pidns_fsconfig_fd ...
# # OK ns.pidns_fsconfig_fd
# ok 3 ns.pidns_fsconfig_fd
# # RUN ns.pidns_reconfigure_remount ...
# # OK ns.pidns_reconfigure_remount
# ok 4 ns.pidns_reconfigure_remount
# # RUN ns.pidns_reconfigure_fsconfig_string_path ...
# # OK ns.pidns_reconfigure_fsconfig_string_path
# ok 5 ns.pidns_reconfigure_fsconfig_string_path
# # RUN ns.pidns_reconfigure_fsconfig_fd ...
# # OK ns.pidns_reconfigure_fsconfig_fd
# ok 6 ns.pidns_reconfigure_fsconfig_fd
# # PASSED: 6 / 6 tests passed.
# # Totals: pass:6 fail:0 xfail:0 xpass:0 skip:0 error:0 ok 26 selftests: proc: proc-pidns

The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20261027/202610271934.fd287c3f-lkp@xxxxxxxxx

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki