ci2 starts bisection 2025-08-30 09:02:07.863280064 +0000 UTC m=+38153.499514460 bisecting fixing commit since 0c935c049b5c196b83b968c72d348ae6fff83ea2 building syzkaller on d3999433718e98ddd68ab6a2be65b8b3df71f407 ensuring issue is reproducible on original commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 80c0e9db0d3bbd4d0adf805ba809595d4176e8f7b8a46568f0ed8d6b3d46e79a run #0: crashed: INFO: task hung in gfs2_make_fs_ro run #1: crashed: INFO: task hung in gfs2_make_fs_ro run #2: crashed: INFO: task hung in gfs2_make_fs_ro run #3: crashed: INFO: task hung in gfs2_make_fs_ro run #4: crashed: INFO: task hung in gfs2_make_fs_ro run #5: crashed: INFO: task hung in gfs2_make_fs_ro run #6: crashed: INFO: task hung in gfs2_make_fs_ro run #7: crashed: INFO: task hung in gfs2_make_fs_ro run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in gfs2_make_fs_ro, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 440fcf01b344d414aced68eb913acdbd97a0c54212aae2e633379b3cd88e36ba run #0: crashed: INFO: task hung in gfs2_make_fs_ro run #1: crashed: INFO: task hung in gfs2_make_fs_ro run #2: crashed: INFO: task hung in gfs2_make_fs_ro run #3: crashed: INFO: task hung in gfs2_make_fs_ro run #4: crashed: INFO: task hung in gfs2_make_fs_ro run #5: crashed: INFO: task hung in gfs2_make_fs_ro run #6: crashed: INFO: task hung in gfs2_make_fs_ro run #7: crashed: INFO: task hung in gfs2_make_fs_ro run #8: crashed: INFO: task hung in gfs2_make_fs_ro run #9: crashed: INFO: task hung in gfs2_make_fs_ro run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in gfs2_make_fs_ro, types: [HANG] the bug reproduces without the instrumentation disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed kconfig minimization: base=3707 full=7306 leaves diff=2040 split chunks (needed=false): <2040> split chunk #0 of len 2040 into 5 parts testing without sub-chunk 1/5 disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6195fb35438aa641f5007c8eff86187fa6e19f74186de850e1b152b02aa6f36d run #0: crashed: INFO: task hung in gfs2_make_fs_ro run #1: crashed: INFO: task hung in gfs2_make_fs_ro run #2: crashed: INFO: task hung in gfs2_make_fs_ro run #3: crashed: INFO: task hung in gfs2_make_fs_ro run #4: crashed: INFO: task hung in gfs2_make_fs_ro run #5: crashed: INFO: task hung in gfs2_make_fs_ro run #6: crashed: INFO: task hung in gfs2_make_fs_ro run #7: crashed: INFO: task hung in gfs2_make_fs_ro run #8: crashed: INFO: task hung in gfs2_make_fs_ro run #9: crashed: INFO: task hung in gfs2_make_fs_ro run #10: crashed: INFO: task hung in gfs2_make_fs_ro run #11: crashed: INFO: task hung in gfs2_make_fs_ro run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in gfs2_make_fs_ro, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7e71437a1cc85578ed85ffcd41af36065efa779a7c4b0337ad7f9a015e55c129 all runs: OK false negative chance: 0.000 testing without sub-chunk 3/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 22bd8f5ef2d5f2993aae720ae7a1fb2f9b3e976925f62cb4d7d3628d49682879 run #0: crashed: INFO: task hung in gfs2_make_fs_ro run #1: crashed: INFO: task hung in gfs2_make_fs_ro run #2: crashed: INFO: task hung in gfs2_make_fs_ro run #3: crashed: INFO: task hung in gfs2_make_fs_ro run #4: crashed: INFO: task hung in gfs2_make_fs_ro run #5: crashed: INFO: task hung in gfs2_make_fs_ro run #6: crashed: INFO: task hung in gfs2_make_fs_ro run #7: crashed: INFO: task hung in gfs2_make_fs_ro run #8: crashed: INFO: task hung in gfs2_make_fs_ro run #9: crashed: INFO: task hung in gfs2_make_fs_ro run #10: crashed: INFO: task hung in gfs2_make_fs_ro run #11: crashed: INFO: task hung in gfs2_make_fs_ro run #12: crashed: INFO: task hung in gfs2_make_fs_ro run #13: crashed: INFO: task hung in gfs2_make_fs_ro run #14: crashed: INFO: task hung in gfs2_make_fs_ro run #15: crashed: INFO: task hung in gfs2_make_fs_ro run #16: crashed: INFO: task hung in gfs2_make_fs_ro run #17: crashed: INFO: task hung in gfs2_make_fs_ro run #18: OK run #19: OK representative crash: INFO: task hung in gfs2_make_fs_ro, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e773bcf0b7280fed16864545ac51eb9e12063acbfb4cb18005b3fbc0f8f2d92d all runs: crashed: INFO: task hung in gfs2_make_fs_ro representative crash: INFO: task hung in gfs2_make_fs_ro, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed testing commit 0c935c049b5c196b83b968c72d348ae6fff83ea2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 561d9b9602f9353092609ffcab2dbeb3c2102941db23615ee1025faef77ee67f all runs: crashed: INFO: task hung in gfs2_make_fs_ro representative crash: INFO: task hung in gfs2_make_fs_ro, types: [HANG] the chunk can be dropped minimized to 408 configs; suspects: [6LOWPAN ACPI_WMI ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CHARGER_BQ24190 CMA DAX_DRIVER DLM DRM DRM_FBDEV_EMULATION DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VKMS DRM_VMWGFX DRM_VMWGFX_FBCON DRM_VRAM_HELPER DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB DVB_CORE DVB_DIB3000MB DVB_DIB3000MC DVB_EC100 DVB_GP8PSK_FE DVB_RTL2830 DVB_RTL2832 DVB_RTL2832_SDR DVB_TEST_DRIVERS DVB_TTUSB_BUDGET DVB_TTUSB_DEC DVB_USB DVB_USB_A800 DVB_USB_AF9005 DVB_USB_AF9005_REMOTE DVB_USB_AF9015 DVB_USB_AF9035 DVB_USB_ANYSEE DVB_USB_AU6610 DVB_USB_AZ6007 DVB_USB_AZ6027 DVB_USB_CE6230 DVB_USB_CINERGY_T2 DVB_USB_CXUSB DVB_USB_CXUSB_ANALOG DVB_USB_DIB0700 DVB_USB_DIB3000MC DVB_USB_DIBUSB_MB DVB_USB_DIBUSB_MC DVB_USB_DIGITV DVB_USB_DTT200U DVB_USB_DTV5100 DVB_USB_DVBSKY DVB_USB_DW2102 DVB_USB_EC168 DVB_USB_GL861 DVB_USB_GP8PSK DVB_USB_LME2510 DVB_USB_M920X DVB_USB_MXL111SF DVB_USB_NOVA_T_USB2 DVB_USB_OPERA1 DVB_USB_PCTV452E DVB_USB_RTL28XXU DVB_USB_TECHNISAT_USB2 DVB_USB_TTUSB2 DVB_USB_UMT_010 DVB_USB_V2 DVB_USB_VP702X DVB_USB_VP7045 DVB_USB_ZD1301 DVB_VIDTV DVB_ZL10353 ECRYPT_FS ECRYPT_FS_MESSAGING EDAC EEPROM_93CX6 EFS_FS ENCRYPTED_KEYS EQUALIZER EROFS_FS EROFS_FS_POSIX_ACL EROFS_FS_SECURITY EROFS_FS_XATTR EROFS_FS_ZIP EVM EVM_ADD_XATTRS EVM_ATTR_FSUUID EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXTCON EXTCON_USBC_TUSB320 F2FS_CHECK_FS F2FS_FAULT_INJECTION F2FS_FS F2FS_FS_COMPRESSION F2FS_FS_LZ4 F2FS_FS_LZ4HC F2FS_FS_LZO F2FS_FS_LZORLE F2FS_FS_POSIX_ACL F2FS_FS_SECURITY F2FS_FS_XATTR F2FS_FS_ZSTD F2FS_STAT_FS FANOTIFY FANOTIFY_ACCESS_PERMISSIONS FB FB_BOOT_VESA_SUPPORT FB_CFB_COPYAREA FB_CFB_FILLRECT FB_CFB_IMAGEBLIT FB_CMDLINE FB_DEFERRED_IO FB_NOTIFY FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VESA FB_VGA16 FB_VIRTUAL FDDI FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FONT_8x16 FONT_8x8 FONT_SUPPORT FRAMEBUFFER_CONSOLE FRAMEBUFFER_CONSOLE_DETECT_PRIMARY FRAMEBUFFER_CONSOLE_ROTATION FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FUSE_DAX FUSE_FS FW_LOADER_COMPRESS FW_LOADER_PAGED_BUF FW_LOADER_USER_HELPER FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GARP GENERIC_PHY GFS2_FS GFS2_FS_LOCKING_DLM GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_EVENTFD HAVE_KVM_IRQCHIP HAVE_KVM_IRQFD HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PM_NOTIFIER HAVE_SCHED_AVG_IRQ HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS HID_ACCUTOUCH HID_ACRUX HID_ACRUX_FF HID_ALPS HID_APPLEIR HID_ASUS HID_AUREAL HID_BATTERY_STRENGTH HID_BETOP_FF HID_BIGBEN_FF HID_CMEDIA HID_CORSAIR HID_COUGAR HID_CP2112 HID_CREATIVE_SB0540 HID_ELAN HID_ELECOM HID_ELO HID_EMS_FF HID_FT260 HID_GEMBIRD HID_GFRM HID_GLORIOUS HID_GREENASIA HID_GT683R HID_HOLTEK HID_ICADE HID_JABRA HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2221 HID_MULTITOUCH HID_NTI HID_ORTEK HID_PENMOUNT HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SEMITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_INTEL_HINGE HID_SENSOR_CUSTOM_SENSOR HID_SENSOR_DEVICE_ROTATION HID_SENSOR_GYRO_3D HID_SENSOR_HUB HID_SENSOR_HUMIDITY HID_SENSOR_IIO_COMMON HID_SENSOR_IIO_TRIGGER HID_SENSOR_INCLINOMETER_3D HID_SENSOR_MAGNETOMETER_3D HID_SENSOR_PRESS HID_SENSOR_PROX HID_SENSOR_TEMP HID_SPEEDLINK HID_STEAM HID_STEELSERIES HID_THINGM HID_TIVO HID_TWINHAN HID_U2FZERO HID_UCLOGIC HID_UDRAW_PS3 HID_VIEWSONIC HID_VIVALDI HID_WACOM HID_WALTOP HID_WIIMOTE HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_CP2615 I2C_DIOLAN_U2C I2C_DLN2 I2C_MUX I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB IIO IIO_BUFFER IIO_KFIFO_BUF IIO_TRIGGER IIO_TRIGGERED_BUFFER IKCONFIG IKCONFIG_PROC IMA IMA_APPRAISE IMA_APPRAISE_MODSIG IMA_DEFAULT_HASH_SHA256 IMA_LSM_RULES IMA_MEASURE_ASYMMETRIC_KEYS IMA_NG_TEMPLATE IMA_QUEUE_EARLY_BOOT_KEYS IMA_READ_POLICY IMA_WRITE_POLICY INET6_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DCCP_DIAG INET_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_DIAG INET_TCP_DIAG INET_UDP_DIAG INET_XFRM_TUNNEL INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_ADDR_TRANS_CONFIGFS INFINIBAND_IPOIB INFINIBAND_IPOIB_CM INFINIBAND_IPOIB_DEBUG INFINIBAND_ISER INFINIBAND_ON_DEMAND_PAGING INFINIBAND_RTRS INFINIBAND_SRP INFINIBAND_USER_ACCESS INFINIBAND_USER_MAD INFINIBAND_USER_MEM INPUT_ATI_REMOTE2 INPUT_CM109 INPUT_IMS_PCU INPUT_JOYDEV INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_UINPUT INPUT_YEALINK INTEGRITY INTEGRITY_ASYMMETRIC_KEYS INTEGRITY_AUDIT INTEGRITY_SIGNATURE INTEGRITY_TRUSTED_KEYRING INTEL_CHT_INT33FE INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTERVAL_TREE IOMMU_SVA_LIB IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_NAT IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL IP6_NF_TARGET_MASQUERADE IP6_NF_TARGET_NPT IP6_NF_TARGET_SYNPROXY IPV6_FOU IPV6_FOU_TUNNEL IPV6_GRE IPV6_ILA IPV6_MIP6 IPV6_MROUTE IPV6_MROUTE_MULTIPLE_TABLES IPV6_MULTIPLE_TABLES IPV6_OPTIMISTIC_DAD IPV6_PIMSM_V2 IPV6_ROUTER_PREF IPV6_ROUTE_INFO IPV6_RPL_LWTUNNEL IPV6_SEG6_BPF IPV6_SEG6_HMAC IPV6_SEG6_LWTUNNEL IPV6_SIT_6RD IPV6_SUBTREES IPV6_TUNNEL IPV6_VTI IPVLAN IPVLAN_L3S IPVTAP IP_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS IP_MROUTE_MULTIPLE_TABLES IP_NF_ARPFILTER IP_NF_ARPTABLES IP_NF_ARP_MANGLE IP_NF_MATCH_AH IP_NF_MATCH_ECN IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_RAW IP_NF_SECURITY IP_NF_TARGET_CLUSTERIP IP_NF_TARGET_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID IP_SCTP IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC IP_SET_BITMAP_PORT IP_SET_HASH_IP IP_SET_HASH_IPMAC IP_SET_HASH_IPMARK IP_SET_HASH_IPPORT IP_SET_HASH_IPPORTIP IP_SET_HASH_IPPORTNET IP_SET_HASH_MAC IP_SET_HASH_NET IP_SET_HASH_NETIFACE IP_SET_HASH_NETNET IP_SET_HASH_NETPORT IP_SET_HASH_NETPORTNET IP_SET_LIST_SET IP_VS IP_VS_DH IP_VS_FO IP_VS_FTP IP_VS_IPV6 IP_VS_LBLC IP_VS_LBLCR IP_VS_LC IP_VS_MH IP_VS_NFCT IP_VS_NQ IP_VS_OVF IP_VS_PE_SIP IP_VS_PROTO_AH IP_VS_PROTO_AH_ESP IP_VS_PROTO_ESP IP_VS_PROTO_SCTP IP_VS_PROTO_TCP IP_VS_PROTO_UDP IP_VS_RR IP_VS_SED IP_VS_SH IP_VS_TWOS IP_VS_WLC IP_VS_WRR IRQ_BYPASS_MANAGER IRQ_POLL IRQ_TIME_ACCOUNTING IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_IMON_RAW IR_MCEUSB IR_REDRAT3 LAPB LCD_CLASS_DEVICE MAC802154 MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_VIPERBOARD MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NFT_FWD_NETDEV NF_TABLES NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE RC_DEVICES REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TYPEC TYPEC_MUX_PI3USB30532 USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIDEO_V4L2 VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD 01879f56bddeda429ecc7cd67bafdb291fbd7775 testing commit 01879f56bddeda429ecc7cd67bafdb291fbd7775 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0b3c8adc738c90b37eeef625880175dee8b070af34fee8ad32ffc7a0dbb8e7ff all runs: crashed: INFO: task hung in gfs2_make_fs_ro representative crash: INFO: task hung in gfs2_make_fs_ro, types: [HANG] crash still not fixed/happens on the oldest tested release reproducer is flaky (1.00 repro chance estimate) revisions tested: 8, total time: 2h0m5.45007775s (build: 25m59.772127548s, test: 1h31m58.072365088s) crash still not fixed or there were kernel test errors commit msg: Linux 5.15.190 crash: INFO: task hung in gfs2_make_fs_ro INFO: task syz.7.48:4142 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.7.48 state:D stack:13224 pid: 4142 ppid: 2378 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x2b8/0x790 kernel/sched/core.c:6395 schedule+0x53/0x90 kernel/sched/core.c:6478 schedule_timeout+0x100/0x140 kernel/time/timer.c:1890 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x7f/0xe0 kernel/sched/completion.c:138 kthread_stop+0x6e/0x170 kernel/kthread.c:666 gfs2_make_fs_ro+0x57/0x2b0 fs/gfs2/super.c:533 signal_our_withdraw fs/gfs2/util.c:166 [inline] gfs2_withdraw.cold+0x161/0x4c0 fs/gfs2/util.c:343 gfs2_metatype_check_ii+0x30/0x40 fs/gfs2/util.c:520 gfs2_metatype_check_i fs/gfs2/util.h:129 [inline] gfs2_quota_init+0x483/0x4c0 fs/gfs2/quota.c:1406 gfs2_make_fs_rw+0xd4/0x160 fs/gfs2/super.c:155 gfs2_fill_super+0xb84/0xbe0 fs/gfs2/ops_fstype.c:1276 get_tree_bdev+0x178/0x280 fs/super.c:1325 gfs2_get_tree+0x1c/0x90 fs/gfs2/ops_fstype.c:1332 vfs_get_tree+0x18/0x70 fs/super.c:1530 do_new_mount fs/namespace.c:3025 [inline] path_mount+0x2c2/0xc60 fs/namespace.c:3355 do_mount fs/namespace.c:3368 [inline] __do_sys_mount fs/namespace.c:3576 [inline] __se_sys_mount fs/namespace.c:3553 [inline] __x64_sys_mount+0xfe/0x140 fs/namespace.c:3553 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f19dfb0c90a RSP: 002b:00007f19df57ce68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f19df57cef0 RCX: 00007f19dfb0c90a RDX: 0000200000000400 RSI: 0000200000012500 RDI: 00007f19df57ceb0 RBP: 0000200000000400 R08: 00007f19df57cef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500 R13: 00007f19df57ceb0 R14: 00000000000125bb R15: 00002000000004c0 INFO: task gfs2_quotad:4153 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:gfs2_quotad state:D stack:13464 pid: 4153 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x2b8/0x790 kernel/sched/core.c:6395 schedule+0x53/0x90 kernel/sched/core.c:6478 bit_wait+0x8/0x50 kernel/sched/wait_bit.c:199 __wait_on_bit+0x23/0x80 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0x90/0xb0 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] wait_on_bit include/linux/wait_bit.h:71 [inline] __gfs2_glock_dq+0x1c8/0x280 fs/gfs2/glock.c:1588 gfs2_glock_dq fs/gfs2/glock.c:1652 [inline] gfs2_glock_dq_uninit+0x1d/0x60 fs/gfs2/glock.c:1672 gfs2_statfs_sync+0x7c/0x190 fs/gfs2/super.c:310 gfs2_quotad+0x21d/0x2d0 fs/gfs2/quota.c:1576 kthread+0x10b/0x130 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Showing all locks held in the system: 1 lock held by khungtaskd/25: #0: ffffffff82fda400 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x15/0xf2 kernel/locking/lockdep.c:6472 1 lock held by udevd/765: #0: ffff888107fc7f18 (&disk->open_mutex){....}-{3:3}, at: blkdev_get_by_dev+0x51/0x2e0 block/bdev.c:820 2 locks held by getty/881: #0: ffff8881049f2098 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x50 drivers/tty/tty_ldisc.c:252 #1: ffffc9000182f2e8 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x4eb/0x610 drivers/tty/n_tty.c:2158 1 lock held by syz-executor/2376: #0: ffff888107fc6f18 (&disk->open_mutex){....}-{3:3}, at: blkdev_get_by_dev+0x51/0x2e0 block/bdev.c:820 2 locks held by udevd/2453: #0: ffff888107fc6f18 (&disk->open_mutex){....}-{3:3}, at: blkdev_put+0x35/0x1e0 block/bdev.c:915 #1: ffff8881045f5c68 (&lo->lo_mutex){....}-{3:3}, at: __loop_clr_fd+0x5b/0x5b0 drivers/block/loop.c:1366 2 locks held by kworker/0:3/2613: #0: ffff888100063138 ((wq_completion)rcu_gp){....}-{0:0}, at: wake_up_worker kernel/workqueue.c:859 [inline] #0: ffff888100063138 ((wq_completion)rcu_gp){....}-{0:0}, at: process_one_work+0x1c1/0x440 kernel/workqueue.c:2273 #1: ffffc9000188fe70 ((work_completion)(&rew.rew_work)){....}-{0:0}, at: wake_up_worker kernel/workqueue.c:859 [inline] #1: ffffc9000188fe70 ((work_completion)(&rew.rew_work)){....}-{0:0}, at: process_one_work+0x1c1/0x440 kernel/workqueue.c:2273 1 lock held by syz.7.48/4142: #0: ffff888178a530e0 (&type->s_umount_key#45/1){....}-{3:3}, at: alloc_super+0xde/0x3d0 fs/super.c:229 3 locks held by kworker/0:5/5491: #0: ffff888100062538 ((wq_completion)events){....}-{0:0}, at: wake_up_worker kernel/workqueue.c:859 [inline] #0: ffff888100062538 ((wq_completion)events){....}-{0:0}, at: process_one_work+0x1c1/0x440 kernel/workqueue.c:2273 #1: ffffc90004e83e70 ((work_completion)(&pwq->unbound_release_work)){....}-{0:0}, at: wake_up_worker kernel/workqueue.c:859 [inline] #1: ffffc90004e83e70 ((work_completion)(&pwq->unbound_release_work)){....}-{0:0}, at: process_one_work+0x1c1/0x440 kernel/workqueue.c:2273 #2: ffffffff82fdae68 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #2: ffffffff82fdae68 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0xe6/0x390 kernel/rcu/tree_exp.h:845 1 lock held by syz.5.610/5719: #0: ffff8881045f4468 (&lo->lo_mutex){....}-{3:3}, at: __loop_clr_fd+0x5b/0x5b0 drivers/block/loop.c:1366 2 locks held by syz.8.613/5725: #0: ffff888107fc7f18 (&disk->open_mutex){....}-{3:3}, at: blkdev_put+0x35/0x1e0 block/bdev.c:915 #1: ffff8881045f8c68 (&lo->lo_mutex){....}-{3:3}, at: lo_release+0x1b/0x90 drivers/block/loop.c:2071 2 locks held by syz.1.615/5727: #0: ffff888107fc4718 (&disk->open_mutex){....}-{3:3}, at: blkdev_put+0x35/0x1e0 block/bdev.c:915 #1: ffff8881045de468 (&lo->lo_mutex){....}-{3:3}, at: lo_release+0x1b/0x90 drivers/block/loop.c:2071 2 locks held by syz.3.616/5730: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 25 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x41/0x5e lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x32/0x80 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x81/0x90 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0x47f/0x4b0 kernel/hung_task.c:369 kthread+0x10b/0x130 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:729