Hi, While doing some cpuset operatios, I see segmentation fault. This is with 6.2-rc5. My sequence of commands may not be correct. The last commands I was doing were: root@my-desktop:/sys/fs/cgroup/lpm_cpus# echo 18-19 > cpuset.cpus root@my-desktop:/sys/fs/cgroup/lpm_cpus# cat cpuset.cpus.partition member root@my-desktop:/sys/fs/cgroup/lpm_cpus# echo root > cpuset.cpus.partition root@my-desktop:/sys/fs/cgroup/lpm_cpus# cat cpuset.cpus.partition root root@my-desktop:/sys/fs/cgroup/lpm_cpus# echo 0-19 > cpuset.cpus root@my-desktop:/sys/fs/cgroup/lpm_cpus# cat cpuset.cpus.partition root invalid (Parent unable to distribute cpu downstream) root@my-desktop:/sys/fs/cgroup/lpm_cpus# cat cpuset.cpus 0-19 root@my-desktop:/sys/fs/cgroup/lpm_cpus# echo root > cpuset.cpus.partition root@my-desktop:/sys/fs/cgroup/lpm_cpus# echo member > cpuset.cpus.partition root@my-desktop:/sys/fs/cgroup/lpm_cpus# echo root > cpuset.cpus.partition Segmentation fault (core dumped) [149384.278880] ------------[ cut here ]------------ [149384.278884] WARNING: CPU: 8 PID: 8628 at kernel/sched/topology.c:2257 build_sched_domains+0xf5e/0x1620 [149384.278892] Modules linked in: r8153_ecm cdc_ether usbnet r8152 mii rfcomm snd_seq_dummy snd_hrtimer cmac algif_hash algif_skcipher af_alg bnep btusb btrtl btbcm btintel btmtk snd_ctl_led uvcvideo bluetooth videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videodev snd_soc_sof_sdw hid_sensor_custom_intel_hinge hid_sensor_als videobuf2_common hid_sensor_trigger ecdh_generic snd_soc_intel_hda_dsp_common industrialio_triggered_buffer snd_sof_probes mc snd_soc_intel_sof_maxim_common ecc kfifo_buf hid_sensor_iio_common binfmt_misc snd_soc_rt715_sdca industrialio snd_soc_rt711_sdca dell_rbtn snd_soc_rt1316_sdw regmap_sdw_mbq hid_sensor_custom regmap_sdw hid_sensor_hub snd_soc_dmic snd_sof_pci_intel_tgl intel_ishtp_hid nls_iso8859_1 snd_sof_intel_hda_common joydev soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof iwlmvm snd_sof_utils dell_laptop snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match x86_pkg_temp_thermal [149384.278944] intel_powerclamp snd_soc_acpi soundwire_bus coretemp mac80211 snd_soc_core kvm_intel snd_compress ac97_bus snd_hda_codec_hdmi libarc4 snd_pcm_dmaengine kvm snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec iwlwifi snd_hda_core snd_hwdep snd_pcm cmdlinepart snd_seq_midi spi_nor snd_seq_midi_event crct10dif_pclmul mei_hdcp snd_rawmidi crc32_pclmul hid_multitouch mei_pxp ghash_clmulni_intel dell_wmi sha512_ssse3 ledtrig_audio mtd rtsx_pci_sdmmc aesni_intel snd_seq processor_thermal_device_pci crypto_simd processor_thermal_device processor_thermal_rfim cryptd dell_smbios hid_generic dell_wmi_sysman dcdbas rapl snd_seq_device intel_rapl_msr ucsi_acpi intel_cstate snd_timer intel_ish_ipc mei_me processor_thermal_mbox spi_intel_pci cfg80211 dell_wmi_ddv typec_ucsi dell_wmi_descriptor firmware_attributes_class wmi_bmof rtsx_pci snd mei i2c_i801 intel_lpss_pci spi_intel processor_thermal_rapl intel_lpss xhci_pci i2c_smbus typec i2c_hid_acpi intel_ishtp soundcore [149384.278997] xhci_pci_renesas idma64 intel_rapl_common igen6_edac i2c_hid hid int3403_thermal int340x_thermal_zone int3400_thermal intel_hid acpi_tad acpi_pad acpi_thermal_rel sparse_keymap msr parport_pc ppdev lp ramoops parport pstore_blk reed_solomon pstore_zone efi_pstore ip_tables x_tables autofs4 nvme nvme_core ahci libahci i915 i2c_algo_bit drm_buddy drm_display_helper drm_kms_helper syscopyarea sysfillrect sysimgblt cec rc_core ttm drm psmouse input_leds video serio_raw vmd mac_hid wmi pinctrl_tigerlake [149384.279034] CPU: 8 PID: 8628 Comm: bash Not tainted 6.2.0-rc5+ #6 [149384.279037] Hardware name: Dell Inc. Precision 5770/0PU01A, BIOS 1.12.0 10/05/2022 [149384.279039] RIP: 0010:build_sched_domains+0xf5e/0x1620 [149384.279043] Code: e9 85 fd ff ff 0f 0b e9 83 fe ff ff 4c 8b ad 78 ff ff ff 44 8b bd 70 ff ff ff 44 8b 35 7b fb e8 01 41 83 c5 01 e9 4a fc ff ff <0f> 0b 41 bf f4 ff ff ff e9 cf fa ff ff 48 89 df e8 8d ab 20 00 31 [149384.279045] RSP: 0000:ffffa7190f46fb30 EFLAGS: 00010246 [149384.279047] RAX: 0000000000000014 RBX: 0000000000000014 RCX: 0000000000000000 [149384.279049] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [149384.279050] RBP: ffffa7190f46fbe0 R08: 0000000000000000 R09: 0000000000000000 [149384.279051] R10: 0000000000000000 R11: 0000000000000001 R12: ffff9610b5eff858 [149384.279052] R13: 0000000000000001 R14: ffff9610b5b61da0 R15: 0000000000000000 [149384.279054] FS: 00007fc229694740(0000) GS:ffff9617ef400000(0000) knlGS:0000000000000000 [149384.279056] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [149384.279057] CR2: 00007ffde4357968 CR3: 0000000106c3c002 CR4: 0000000000770ee0 [149384.279059] PKRU: 55555554 [149384.279060] Call Trace: [149384.279062] <TASK> [149384.279065] ? __set_cpus_allowed_ptr_locked+0xef/0x1b0 [149384.279069] partition_sched_domains_locked+0x2b7/0x910 [149384.279072] ? __kmem_cache_alloc_node+0x196/0x330 [149384.279076] ? rebuild_sched_domains_locked+0x37b/0x830 [149384.279080] rebuild_sched_domains_locked+0x51b/0x830 [149384.279083] update_prstate+0x121/0x340 [149384.279085] sched_partition_write+0x97/0x1d0 [149384.279088] cgroup_file_write+0x8a/0x1b0 [149384.279091] ? __check_object_size+0x23a/0x260 [149384.279096] kernfs_fop_write_iter+0x130/0x210 [149384.279099] vfs_write+0x24e/0x410 [149384.279103] ksys_write+0x73/0x100 [149384.279105] __x64_sys_write+0x19/0x30 [149384.279108] do_syscall_64+0x58/0x90 [149384.279112] ? do_syscall_64+0x67/0x90 [149384.279114] ? do_syscall_64+0x67/0x90 [149384.279117] entry_SYSCALL_64_after_hwframe+0x72/0xdc [149384.279120] RIP: 0033:0x7fc22950cd94 [149384.279122] Code: 15 71 90 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 80 3d 4d 18 0f 00 00 74 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 48 83 ec 28 48 89 54 24 18 48 [149384.279124] RSP: 002b:00007ffde435c5b8 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [149384.279126] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fc22950cd94 [149384.279128] RDX: 0000000000000005 RSI: 000055f9c84b9760 RDI: 0000000000000001 [149384.279129] RBP: 000055f9c84b9760 R08: 000055f9c7ba1a20 R09: 0000000000000073 [149384.279130] R10: 00000000ffffffff R11: 0000000000000202 R12: 0000000000000005 [149384.279132] R13: 00007fc2295f7760 R14: 00007fc2295f35e0 R15: 00007fc2295f29e0 [149384.279134] </TASK> [149384.279135] ---[ end trace 0000000000000000 ]--- [149384.279137] rd : Disabling EAS, SMT is not supported [149384.279145] general protection fault, probably for non-canonical address 0x657361625f767681: 0000 [#1] PREEMPT SMP NOPTI [149384.279149] CPU: 8 PID: 8628 Comm: bash Tainted: G W 6.2.0-rc5+ #6 [149384.279152] Hardware name: Dell Inc. Precision 5770/0PU01A, BIOS 1.12.0 10/05/2022 [149384.279153] RIP: 0010:partition_sched_domains_locked+0x477/0x910 [149384.279157] Code: 41 80 fc 01 0f 87 65 17 e2 00 41 83 e4 01 74 11 e9 3f 17 e2 00 4c 89 ff 4d 8b 7f 08 e8 72 90 20 00 4d 85 ff 75 ef 48 8b 4d b8 <48> 8b 81 18 07 00 00 48 c7 81 18 07 00 00 00 00 00 00 48 85 c0 74 [149384.279159] RSP: 0000:ffffa7190f46fbf0 EFLAGS: 00010246 [149384.279161] RAX: 0000000000000028 RBX: ffff9610b5eff850 RCX: 657361625f766f69 [149384.279163] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [149384.279164] RBP: ffffa7190f46fc80 R08: 0000000000000000 R09: 0000000000000000 [149384.279166] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9610b5b61d10 [149384.279167] R13: 0000000000000014 R14: 0000000000000008 R15: ffffffffbda1f000 [149384.279169] FS: 00007fc229694740(0000) GS:ffff9617ef400000(0000) knlGS:0000000000000000 [149384.279171] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [149384.279172] CR2: 00007ffde4357968 CR3: 0000000106c3c002 CR4: 0000000000770ee0 [149384.279174] PKRU: 55555554 [149384.279175] Call Trace: [149384.279177] <TASK> [149384.279179] rebuild_sched_domains_locked+0x51b/0x830 [149384.279182] update_prstate+0x121/0x340 [149384.279185] sched_partition_write+0x97/0x1d0 [149384.279188] cgroup_file_write+0x8a/0x1b0 [149384.279191] ? __check_object_size+0x23a/0x260 [149384.279195] kernfs_fop_write_iter+0x130/0x210 [149384.279198] vfs_write+0x24e/0x410 [149384.279201] ksys_write+0x73/0x100 [149384.279204] __x64_sys_write+0x19/0x30 [149384.279206] do_syscall_64+0x58/0x90 [149384.279209] ? do_syscall_64+0x67/0x90 [149384.279212] ? do_syscall_64+0x67/0x90 [149384.279215] entry_SYSCALL_64_after_hwframe+0x72/0xdc [149384.279217] RIP: 0033:0x7fc22950cd94 [149384.279219] Code: 15 71 90 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 80 3d 4d 18 0f 00 00 74 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 48 83 ec 28 48 89 54 24 18 48 [149384.279221] RSP: 002b:00007ffde435c5b8 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [149384.279223] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fc22950cd94 [149384.279225] RDX: 0000000000000005 RSI: 000055f9c84b9760 RDI: 0000000000000001 [149384.279226] RBP: 000055f9c84b9760 R08: 000055f9c7ba1a20 R09: 0000000000000073 [149384.279228] R10: 00000000ffffffff R11: 0000000000000202 R12: 0000000000000005 [149384.279229] R13: 00007fc2295f7760 R14: 00007fc2295f35e0 R15: 00007fc2295f29e0 [149384.279232] </TASK> [149384.279233] Modules linked in: r8153_ecm cdc_ether usbnet r8152 mii rfcomm snd_seq_dummy snd_hrtimer cmac algif_hash algif_skcipher af_alg bnep btusb btrtl btbcm btintel btmtk snd_ctl_led uvcvideo bluetooth videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videodev snd_soc_sof_sdw hid_sensor_custom_intel_hinge hid_sensor_als videobuf2_common hid_sensor_trigger ecdh_generic snd_soc_intel_hda_dsp_common industrialio_triggered_buffer snd_sof_probes mc snd_soc_intel_sof_maxim_common ecc kfifo_buf hid_sensor_iio_common binfmt_misc snd_soc_rt715_sdca industrialio snd_soc_rt711_sdca dell_rbtn snd_soc_rt1316_sdw regmap_sdw_mbq hid_sensor_custom regmap_sdw hid_sensor_hub snd_soc_dmic snd_sof_pci_intel_tgl intel_ishtp_hid nls_iso8859_1 snd_sof_intel_hda_common joydev soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof iwlmvm snd_sof_utils dell_laptop snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match x86_pkg_temp_thermal [149384.279274] intel_powerclamp snd_soc_acpi soundwire_bus coretemp mac80211 snd_soc_core kvm_intel snd_compress ac97_bus snd_hda_codec_hdmi libarc4 snd_pcm_dmaengine kvm snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec iwlwifi snd_hda_core snd_hwdep snd_pcm cmdlinepart snd_seq_midi spi_nor snd_seq_midi_event crct10dif_pclmul mei_hdcp snd_rawmidi crc32_pclmul hid_multitouch mei_pxp ghash_clmulni_intel dell_wmi sha512_ssse3 ledtrig_audio mtd rtsx_pci_sdmmc aesni_intel snd_seq processor_thermal_device_pci crypto_simd processor_thermal_device processor_thermal_rfim cryptd dell_smbios hid_generic dell_wmi_sysman dcdbas rapl snd_seq_device intel_rapl_msr ucsi_acpi intel_cstate snd_timer intel_ish_ipc mei_me processor_thermal_mbox spi_intel_pci cfg80211 dell_wmi_ddv typec_ucsi dell_wmi_descriptor firmware_attributes_class wmi_bmof rtsx_pci snd mei i2c_i801 intel_lpss_pci spi_intel processor_thermal_rapl intel_lpss xhci_pci i2c_smbus typec i2c_hid_acpi intel_ishtp soundcore [149384.279318] xhci_pci_renesas idma64 intel_rapl_common igen6_edac i2c_hid hid int3403_thermal int340x_thermal_zone int3400_thermal intel_hid acpi_tad acpi_pad acpi_thermal_rel sparse_keymap msr parport_pc ppdev lp ramoops parport pstore_blk reed_solomon pstore_zone efi_pstore ip_tables x_tables autofs4 nvme nvme_core ahci libahci i915 i2c_algo_bit drm_buddy drm_display_helper drm_kms_helper syscopyarea sysfillrect sysimgblt cec rc_core ttm drm psmouse input_leds video serio_raw vmd mac_hid wmi pinctrl_tigerlake [149384.279350] ---[ end trace 0000000000000000 ]--- [149384.693895] RIP: 0010:partition_sched_domains_locked+0x477/0x910 [149384.693902] Code: 41 80 fc 01 0f 87 65 17 e2 00 41 83 e4 01 74 11 e9 3f 17 e2 00 4c 89 ff 4d 8b 7f 08 e8 72 90 20 00 4d 85 ff 75 ef 48 8b 4d b8 <48> 8b 81 18 07 00 00 48 c7 81 18 07 00 00 00 00 00 00 48 85 c0 74 [149384.693904] RSP: 0000:ffffa7190f46fbf0 EFLAGS: 00010246 [149384.693907] RAX: 0000000000000028 RBX: ffff9610b5eff850 RCX: 657361625f766f69 [149384.693909] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [149384.693910] RBP: ffffa7190f46fc80 R08: 0000000000000000 R09: 0000000000000000 [149384.693911] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9610b5b61d10 [149384.693912] R13: 0000000000000014 R14: 0000000000000008 R15: ffffffffbda1f000 [149384.693914] FS: 00007fc229694740(0000) GS:ffff9617ef400000(0000) knlGS:0000000000000000 [149384.693915] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [149384.693917] CR2: 00007ffde4357968 CR3: 0000000106c3c002 CR4: 0000000000770ee0 [149384.693918] PKRU: 55555554 Thanks, Srinivas
