ci2 starts bisection 2024-07-09 23:59:59.17536891 +0000 UTC m=+40518.938776713 bisecting fixing commit since f2295faba5e8249ae4082791bfc1664c88fff83a building syzkaller on 07b455f928ae5c2cd07f4d61c1b499f56ea3dd08 ensuring issue is reproducible on original commit f2295faba5e8249ae4082791bfc1664c88fff83a testing commit f2295faba5e8249ae4082791bfc1664c88fff83a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4ba61378e7118ac290ff8d660019b7b533b344626656c95bd238aff482cf21e8 run #0: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc0035cc230] Location: Message:Quota 'T2A_CPUS' exceeded. Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}. run #1: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc0036a0320] Location: Message:Quota 'T2A_CPUS' exceeded. Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}. run #2: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc008488140] Location: Message:Quota 'T2A_CPUS' exceeded. Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}. run #3: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc0035cc6e0] Location: Message:Quota 'T2A_CPUS' exceeded. Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}. run #4: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc0035ccaa0] Location: Message:Quota 'T2A_CPUS' exceeded. Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}. run #5: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc005f300a0] Location: Message:Quota 'T2A_CPUS' exceeded. Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}. run #6: crashed: INFO: task hung in gfs2_glock_nq run #7: crashed: INFO: task hung in gfs2_glock_nq run #8: crashed: INFO: task hung in gfs2_glock_nq run #9: crashed: INFO: task hung in gfs2_glock_nq run #10: crashed: INFO: task hung in gfs2_glock_nq run #11: crashed: INFO: task hung in gfs2_glock_nq run #12: crashed: INFO: task hung in gfs2_glock_nq run #13: crashed: INFO: task hung in gfs2_glock_nq run #14: crashed: INFO: task hung in gfs2_glock_nq run #15: crashed: INFO: task hung in gfs2_glock_nq run #16: crashed: INFO: task hung in gfs2_glock_nq run #17: crashed: INFO: task hung in gfs2_glock_nq run #18: crashed: INFO: task hung in gfs2_glock_nq run #19: crashed: INFO: task hung in gfs2_glock_nq representative crash: INFO: task hung in gfs2_glock_nq, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit f2295faba5e8249ae4082791bfc1664c88fff83a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 804977c428b7a3baf73513f011a25030a2d322c2c215349bf111eab434dab15d all runs: crashed: INFO: task hung in gfs2_glock_nq representative crash: INFO: task hung in gfs2_glock_nq, types: [HANG] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed kconfig minimization: base=7493 full=9693 leaves diff=1930 split chunks (needed=false): <1930> split chunk #0 of len 1930 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit f2295faba5e8249ae4082791bfc1664c88fff83a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eafd7fdd34e33027aac2ac3a575d4864322c92ac21e5ee8cbbe18ba4cdf8078f all runs: crashed: INFO: task hung in gfs2_glock_nq representative crash: INFO: task hung in gfs2_glock_nq, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit f2295faba5e8249ae4082791bfc1664c88fff83a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8eb28aa90714d79204972a5abdcb9cf970d8609dfefd09ff01cf0f52b9771f98 all runs: boot failed: can't ssh into the instance unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0 testing without sub-chunk 3/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed testing commit f2295faba5e8249ae4082791bfc1664c88fff83a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 132ce13384a321d3f0f27e656b13fc3ab5964179f2ccdc14e48d6c3a34c38e01 all runs: crashed: INFO: task hung in gfs2_glock_nq representative crash: INFO: task hung in gfs2_glock_nq, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit f2295faba5e8249ae4082791bfc1664c88fff83a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c611aa0697356a6b6ca08c2ca88c69387dc2ff040b0867a93a0666704d9000ce all runs: crashed: INFO: task hung in gfs2_glock_nq representative crash: INFO: task hung in gfs2_glock_nq, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit f2295faba5e8249ae4082791bfc1664c88fff83a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e6ee0bd976d9daf4645943d2a29a56a6d3a35c82852540bb62294c2177247910 all runs: crashed: INFO: task hung in gfs2_glock_nq representative crash: INFO: task hung in gfs2_glock_nq, types: [HANG] the chunk can be dropped minimized to 386 configs; suspects: [6LOWPAN ACPI_VIDEO DLM DRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_V3D DRM_VC4 DRM_VGEM DRM_VIRTIO_GPU DRM_VKMS DRM_VRAM_HELPER DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB 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_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 E100 ECRYPT_FS ECRYPT_FS_MESSAGING 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_POSIX_ACL EXT3_FS_SECURITY EXT4_FS_SECURITY 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 FB_DEFERRED_IO FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VIRTUAL FDDI FIB_RULES FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FRAMEBUFFER_CONSOLE_ROTATION FRONTSWAP FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FW_LOADER_COMPRESS FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GCC10_NO_ARRAY_BOUNDS GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIO_DLN2 GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GVE HAVE_ARCH_USERFAULTFD_MINOR HAVE_IMA_KEXEC HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS HIDRAW HID_ACCUTOUCH HID_ACRUX HID_ACRUX_FF HID_ALPS HID_APPLEIR HID_ASUS HID_AUREAL HID_BATTERY_STRENGTH HID_BETOP_FF HID_CMEDIA HID_CORSAIR HID_CP2112 HID_ELECOM HID_ELO HID_EMS_FF HID_GEMBIRD HID_GFRM HID_GREENASIA HID_GT683R HID_GYRATION HID_HOLTEK HID_ICADE HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MAGICMOUSE HID_MAYFLASH HID_NTI HID_NTRIG HID_ORTEK HID_PENMOUNT HID_PETALYNX HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PID HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SAMSUNG HID_SENSOR_ACCEL_3D HID_SENSOR_ALS 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_STEELSERIES HID_SUNPLUS HID_THINGM HID_TIVO HID_TOPSEED HID_TWINHAN HID_UCLOGIC HID_UDRAW_PS3 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPFS_FS I2C_DIOLAN_U2C I2C_DLN2 I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB 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_AH INET6_ESP INET6_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DCCP_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_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_JOYSTICK 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 IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_IPV6HEADER IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL 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_ADVANCED_ROUTER IP_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS IP_MROUTE IP_MROUTE_COMMON 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_PIMSM_V1 IP_PIMSM_V2 IP_PNP_RARP IP_ROUTE_CLASSID IP_ROUTE_MULTIPATH IP_ROUTE_VERBOSE 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_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 IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TTUSBIR ISDN ISDN_CAPI_MIDDLEWARE ISO9660_FS JFFS2_CMODE_PRIORITY JFFS2_COMPRESSION_OPTIONS JFFS2_FS JFFS2_FS_POSIX_ACL JFFS2_FS_SECURITY JFFS2_FS_WRITEBUFFER JFFS2_FS_XATTR JFFS2_LZO JFFS2_RTIME JFFS2_RUBIN JFFS2_SUMMARY JFFS2_ZLIB JFS_DEBUG JFS_FS JFS_POSIX_ACL JFS_SECURITY JOLIET JOYSTICK_IFORCE JOYSTICK_IFORCE_USB JOYSTICK_XPAD JOYSTICK_XPAD_FF JOYSTICK_XPAD_LEDS KARMA_PARTITION KCOV KCOV_ENABLE_COMPARISONS LAPB LCD_CLASS_DEVICE MAC802154 MEDIA_RADIO_SUPPORT MEDIA_TEST_SUPPORT MFD_DLN2 MFD_VIPERBOARD MPTCP NET_IPGRE_DEMUX NFT_FWD_NETDEV NF_CONNTRACK_FTP NF_CONNTRACK_SIP NF_TABLES NF_TABLES_NETDEV PARTITION_ADVANCED RADIO_ADAPTERS RADIO_SI4713 RFKILL SND SND_SOC SOUND WAN XFRM ZONE_DEVICE] disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD 7753af06eebfb56b44673bbfcb0b78d73a54ede9 testing commit 7753af06eebfb56b44673bbfcb0b78d73a54ede9 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 753f11ed64b4e87ae729e97aa0a09c2abfe9c186b9665e63c40f727e6accccca all runs: crashed: INFO: task hung in gfs2_glock_nq representative crash: INFO: task hung in gfs2_glock_nq, types: [HANG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 1h50m9.004483973s (build: 44m37.075869048s, test: 1h2m47.783074172s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.97 crash: INFO: task hung in gfs2_glock_nq INFO: task syz-executor.0:2983 blocked for more than 143 seconds. Not tainted 6.1.97-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:2983 ppid:1 flags:0x00000005 Call trace: __switch_to+0x210/0x424 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5245 [inline] __schedule+0x4f8/0x7e4 kernel/sched/core.c:6558 schedule+0x58/0xe0 kernel/sched/core.c:6634 bit_wait+0x18/0x60 kernel/sched/wait_bit.c:199 __wait_on_bit+0xe0/0x190 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0x80/0xa8 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] gfs2_glock_wait+0x64/0x138 fs/gfs2/glock.c:1348 gfs2_glock_nq+0x620/0x960 fs/gfs2/glock.c:1600 gfs2_glock_nq_init fs/gfs2/glock.h:264 [inline] __gfs2_lookup+0xd4/0x1dc fs/gfs2/inode.c:879 gfs2_lookup+0x2c/0x3c fs/gfs2/inode.c:904 __lookup_slow+0x14c/0x204 fs/namei.c:1690 lookup_slow+0x44/0x68 fs/namei.c:1707 walk_component+0x178/0x1b0 fs/namei.c:1998 lookup_last fs/namei.c:2455 [inline] path_lookupat+0xc4/0x208 fs/namei.c:2479 filename_lookup+0xf0/0x25c fs/namei.c:2508 user_path_at_empty+0x5c/0x148 fs/namei.c:2907 user_path_at include/linux/namei.h:57 [inline] ksys_umount fs/namespace.c:1822 [inline] __do_sys_umount fs/namespace.c:1830 [inline] __se_sys_umount fs/namespace.c:1828 [inline] __arm64_sys_umount+0x78/0xe8 fs/namespace.c:1828 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x64/0x178 arch/arm64/kernel/syscall.c:52 el0_svc_common+0xb8/0x174 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x48/0x174 arch/arm64/kernel/syscall.c:204 el0_svc+0x34/0x100 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff80000c137ba8 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_one_gp kernel/rcu/tasks.h:516 [inline] #0: ffff80000c137ba8 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_kthread+0xb4/0x368 kernel/rcu/tasks.h:561 1 lock held by rcu_tasks_trace/13: #0: ffff80000c1381f8 (rcu_tasks_trace.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_one_gp kernel/rcu/tasks.h:516 [inline] #0: ffff80000c1381f8 (rcu_tasks_trace.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_kthread+0xb4/0x368 kernel/rcu/tasks.h:561 1 lock held by khungtaskd/28: #0: ffff80000c137a80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:349 2 locks held by getty/2683: #0: ffff0000c5a70898 (&tty->ldisc_sem){....}-{0:0}, at: ldsem_down_read+0x2c/0x3c drivers/tty/tty_ldsem.c:340 #1: ffff80000dd462f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x290/0xcc4 drivers/tty/n_tty.c:2198 1 lock held by syz-executor.0/2983: #0: ffff0000ca5e3310 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000ca5e3310 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow+0x34/0x68 fs/namei.c:1706 =============================================