ci2 starts bisection 2025-12-10 14:28:38.055595326 +0000 UTC m=+1213130.232718373
bisecting fixing commit since ab75170520d4964f3acf8bb1f91d34cbc650688e
building syzkaller on f3558dbf032eab2b77c1cb11b9ce2baffe7838d3
ensuring issue is reproducible on original commit ab75170520d4964f3acf8bb1f91d34cbc650688e
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 8b9c807c5024cf1dd486ee70469f6cd9ab8410a0e04b76966764ab8483ab16dc
all runs: crashed: INFO: task hung in find_inode
representative crash: INFO: task hung in find_inode, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 97bf7a7ad4ee895628e0a101deeb63a1f0ed19dbd155da8442f7f20cb8ac4648
all runs: crashed: INFO: task hung in find_inode
representative crash: INFO: task hung in find_inode, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed
kconfig minimization: base=4109 full=8236 leaves diff=2163
split chunks (needed=false): <2163>
split chunk #0 of len 2163 into 5 parts
testing without sub-chunk 1/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 5925003fff1ee2e3fa897f3963c3d0f810bed50e432a12199c70ce5aedb1d2b9
all runs: crashed: INFO: task hung in find_inode
representative crash: INFO: task hung in find_inode, 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 ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 6537523e0957645dfebd8cab4884ddce439f9994f3c9c7e55ca7feca88d7cfbe
all runs: crashed: INFO: task hung in find_inode
representative crash: INFO: task hung in find_inode, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: f9cd7379359704c7b925c6dda697dcacd1f5b1d519871690f80cc777776dd108
all runs: crashed: INFO: task hung in find_inode
representative crash: INFO: task hung in find_inode, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: f4199dcf32d515087ab11ba49b23d42d733dfb4c89d432244687a32613e07883
all runs: OK
false negative chance: 0.000
testing without sub-chunk 5/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 3b03dc46343c387a7242c0c2b0ed4305ebef7186cee91305e19fb65f25d9cacd
all runs: crashed: INFO: task hung in find_inode
representative crash: INFO: task hung in find_inode, types: [HANG]
the chunk can be dropped
minimized to 433 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_HAS_PTE_DEVMAP ATM AX25 BT BT_BREDR BT_HIDP BXT_WC_PMIC_OPREGION CFG80211 CMA CRYPTO_CTS DAX DLM DRM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO HID_NVIDIA_SHIELD HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_STEAM HID_THRUSTMASTER IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IP_SCTP L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MCORE2 MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NINTENDO_FF NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NLS_UCS2_UTILS NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN NVIDIA_SHIELD_FF NVME_CORE NVME_FABRICS NVME_FC NVME_MULTIPATH NVME_RDMA NVME_TARGET NVME_TARGET_FC NVME_TARGET_FCLOOP NVME_TARGET_LOOP NVME_TARGET_RDMA NVME_TARGET_TCP NVME_TCP N_GSM N_HDLC OCFS2_DEBUG_FS OCFS2_FS OCFS2_FS_O2CB OCFS2_FS_STATS OCFS2_FS_USERSPACE_CLUSTER OF_GPIO OF_PMEM OMFS_FS OPENVSWITCH OPENVSWITCH_GENEVE OPENVSWITCH_GRE OPENVSWITCH_VXLAN ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_DEBUG OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PAGE_IDLE_FLAG PAGE_REPORTING PAHOLE_HAS_BTF_TAG PAHOLE_HAS_LANG_EXCLUDE PAHOLE_HAS_SPLIT_BTF PARPORT PARPORT_NOT_PC PARTITION_ADVANCED PCCARD PCCARD_NONSTATIC PCIEAER PCI_ENDPOINT PCI_IOV PCMCIA PCMCIA_LOAD_CIS PERCPU_STATS PERSISTENT_KEYRINGS PHONET PHYLINK PHY_CPCAP_USB PHY_QCOM_USB_HS PHY_QCOM_USB_HSIC PHY_SAMSUNG_USB2 PHY_TUSB1210 PKCS7_TEST_KEY PKCS8_PRIVATE_KEY_PARSER PLAYSTATION_FF PLFXLC PMIC_OPREGION PM_CLK PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOE_HASH_BITS_1 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PROC_CHILDREN PROC_PID_CPUSET PSAMPLE PSI PSTORE PSTORE_COMPRESS PTDUMP_CORE QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_TEA575X RAID6_PQ RAID_ATTRS RC_ATI_REMOTE RC_CORE RC_DEVICES RC_XBOX_DVD RDMA_RXE RDMA_SIW RDS RDS_RDMA RDS_TCP READ_ONLY_THP_FOR_FS REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGMAP_SPI REGULATOR REGULATOR_FIXED_VOLTAGE REGULATOR_TWL4030 RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 RMI4_F3A ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RPCSEC_GSS_KRB5_ENCTYPES_AES_SHA1 RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE SCREEN_INFO SCSI_FC_ATTRS SCSI_HPSA SCSI_ISCSI_ATTRS SCSI_LOGGING SCSI_NETLINK SCSI_SAS_ATA SCSI_SAS_ATTRS SCSI_SAS_LIBSAS SCSI_SCAN_ASYNC SCSI_SRP_ATTRS SCTP_COOKIE_HMAC_MD5 SCTP_COOKIE_HMAC_SHA1 SCTP_DEFAULT_COOKIE_HMAC_MD5 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SECURITY_SMACK_NETFILTER SENSORS_AQUACOMPUTER_D5NEXT SENSORS_CORSAIR_CPRO SENSORS_CORSAIR_PSU SENSORS_GIGABYTE_WATERFORCE SENSORS_NZXT_KRAKEN2 SENSORS_NZXT_SMART2 SENSORS_POWERZ SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SKB_DECRYPTED SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS SMB_SERVER SMC SMC_DIAG SMSC_PHY SMS_SDIO_DRV SMS_SIANO_DEBUGFS SMS_SIANO_MDTV SMS_SIANO_RC SMS_USB_DRV SND SND_ALOOP SND_BCD2000 SND_CTL_FAST_LOOKUP SND_CTL_LED SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_DYNAMIC_MINORS SND_HDA SND_HDA_CODEC_ANALOG SND_HDA_CODEC_CA0110 SND_HDA_CODEC_CA0132 SND_HDA_CODEC_CIRRUS SND_HDA_CODEC_CMEDIA SND_HDA_CODEC_CONEXANT SND_HDA_CODEC_HDMI SND_HDA_CODEC_REALTEK SND_HDA_CODEC_SI3054 SND_HDA_CODEC_SIGMATEL SND_HDA_CODEC_VIA SND_HDA_COMPONENT SND_HDA_CORE SND_HDA_GENERIC SND_HDA_GENERIC_LEDS SND_HDA_HWDEP SND_HDA_I915 SND_HDA_INPUT_BEEP SND_HDA_INTEL SND_HDA_PATCH_LOADER SND_HDA_RECONFIG SND_HDA_SCODEC_COMPONENT SND_HRTIMER SND_HWDEP SND_INTEL_DSP_CONFIG SND_INTEL_NHLT SND_INTEL_SOUNDWIRE_ACPI SND_JACK SND_JACK_INPUT_DEV SND_MIXER_OSS SND_OSSEMUL SND_PCI SND_PCM SND_PCMCIA SND_PCM_OSS SND_PCM_OSS_PLUGINS SND_PCM_TIMER SND_PCM_XRUN_DEBUG SND_PROC_FS SND_RAWMIDI SND_SEQUENCER SND_SEQUENCER_OSS SND_SEQ_DEVICE SND_SEQ_DUMMY SND_SEQ_HRTIMER_DEFAULT SND_SEQ_MIDI SND_SEQ_MIDI_EVENT SND_SEQ_UMP_CLIENT SND_SEQ_VIRMIDI SND_SOC SND_SOC_I2C_AND_SPI SND_SOC_SDCA_OPTIONAL SND_SUPPORT_OLD_API SND_TIMER SND_UMP SND_UMP_LEGACY_RAWMIDI SND_USB SND_USB_6FIRE SND_USB_AUDIO SND_USB_AUDIO_MIDI_V2 SND_USB_AUDIO_USE_MEDIA_CONTROLLER SND_USB_CAIAQ SND_USB_CAIAQ_INPUT SND_USB_HIFACE SND_USB_LINE6 SND_USB_POD SND_USB_PODHD SND_USB_TONEPORT SND_USB_UA101 SND_USB_US122L SND_USB_USX2Y SND_USB_VARIAX SND_VERBOSE_PROCFS SND_VIRMIDI SND_VIRTIO SND_VMASTER SND_X86 SOCK_VALIDATE_XMIT SOLARIS_X86_PARTITION SONY_FF SOUND SOUNDWIRE SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_LJCA SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_COMPILE_DECOMP_MULTI SQUASHFS_DECOMP_MULTI SQUASHFS_FILE_DIRECT SQUASHFS_LZ4 SQUASHFS_LZO SQUASHFS_XATTR SQUASHFS_XZ SQUASHFS_ZLIB SQUASHFS_ZSTD SSB SSB_PCIHOST_POSSIBLE SSB_PCMCIAHOST_POSSIBLE SSB_SDIOHOST_POSSIBLE STEAM_FF STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSFB SYSFS_SYSCALL SYSV68_PARTITION SYSV_FS TABLET_USB_ACECAD TABLET_USB_AIPTEK TABLET_USB_HANWANG TABLET_USB_KBTAB TABLET_USB_PEGASUS TAHVO_USB TAHVO_USB_HOST_BY_DEFAULT TCG_CRB TCG_TIS TCG_TIS_CORE TCG_TPM TCP_CONG_BBR TCP_CONG_BIC TCP_CONG_CDG TCP_CONG_DCTCP TCP_CONG_HSTCP TCP_CONG_HTCP TCP_CONG_HYBLA TCP_CONG_ILLINOIS TCP_CONG_LP TCP_CONG_NV TCP_CONG_SCALABLE TCP_CONG_VEGAS TCP_CONG_VENO TCP_CONG_WESTWOOD TCP_CONG_YEAH TEE TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THERMAL_GOV_USER_SPACE THP_SWAP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE TMPFS_QUOTA TOOLS_SUPPORT_RELR TOUCHSCREEN_SUR40 TOUCHSCREEN_USB_3M TOUCHSCREEN_USB_COMPOSITE TOUCHSCREEN_USB_DMC_TSC10 TOUCHSCREEN_USB_E2I TOUCHSCREEN_USB_EASYTOUCH TOUCHSCREEN_USB_EGALAX TOUCHSCREEN_USB_ELO TOUCHSCREEN_USB_ETT_TC45USB TOUCHSCREEN_USB_ETURBO TOUCHSCREEN_USB_GENERAL_TOUCH TOUCHSCREEN_USB_GOTOP TOUCHSCREEN_USB_GUNZE TOUCHSCREEN_USB_IDEALTEK TOUCHSCREEN_USB_IRTOUCH TOUCHSCREEN_USB_ITM TOUCHSCREEN_USB_JASTEC TOUCHSCREEN_USB_NEXIO TOUCHSCREEN_USB_PANJIT TOUCHSCREEN_USB_ZYTRONIC TRANSPARENT_HUGEPAGE TRANSPARENT_HUGEPAGE_MADVISE TTPCI_EEPROM TTY_PRINTK TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_ANX7411 TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_FSA4480 TYPEC_MUX_GPIO_SBU TYPEC_MUX_INTEL_PMC TYPEC_MUX_NB7VPQ904M TYPEC_MUX_PTN36502 TYPEC_MUX_WCD939X_USBSS TYPEC_NVIDIA_ALTMODE TYPEC_RT1711H TYPEC_RT1719 TYPEC_STUSB160X TYPEC_TCPCI TYPEC_TCPCI_MAXIM TYPEC_TCPCI_MT6370 TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI TYPEC_WCOVE TYPEC_WUSB3801 UBIFS_ATIME_SUPPORT UBIFS_FS UBIFS_FS_ADVANCED_COMPR UBIFS_FS_LZO UBIFS_FS_SECURITY UBIFS_FS_XATTR UBIFS_FS_ZLIB UBIFS_FS_ZSTD UCSI_ACPI UCSI_CCG UCSI_STM32G0 UDF_FS UDMABUF UFS_FS UFS_FS_WRITE UHID ULTRIX_PARTITION UNICODE UNIXWARE_DISKLABEL UNIX_DIAG USB4 USB4_NET USBIP_CORE USBIP_HOST USBIP_VHCI_HCD USBIP_VUDC USBPCWATCHDOG USB_ACM USB_ADUTUX USB_AIRSPY USB_ALI_M5632 USB_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_DWC2 USB_GADGET USB_LJCA USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VXLAN WIRELESS WLAN WLAN_VENDOR_PURELIFI ZONE_DEVICE]
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing current HEAD 0048fbb4011ec55c32d3148b2cda56433f273375
testing commit 0048fbb4011ec55c32d3148b2cda56433f273375 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: d3f5f02751a8de358ce7b586a82f15d423e890d3b19d4e8aca4ab96605563421
all runs: crashed: INFO: task hung in find_inode
representative crash: INFO: task hung in find_inode, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h2m50.235431456s (build: 59m34.047621909s, test: 54m36.729163759s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'locking-futex-2025-12-10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
crash: INFO: task hung in find_inode
INFO: task syz.6.74:5103 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.74 state:D stack:12776 pid:5103 tgid:5102 ppid:3311 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x63c/0x17d0 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6960
__wait_on_freeing_inode+0xe7/0x180 fs/inode.c:2524
find_inode+0xfa/0x1e0 fs/inode.c:1057
inode_insert5+0x9c/0x250 fs/inode.c:1306
insert_inode_locked4+0x3e/0x70 fs/inode.c:1880
nilfs_insert_inode_locked fs/nilfs2/inode.c:297 [inline]
nilfs_new_inode+0x1b9/0x260 fs/nilfs2/inode.c:351
nilfs_mkdir+0x72/0x170 fs/nilfs2/namei.c:234
vfs_mkdir+0x194/0x1d0 fs/namei.c:5130
do_mkdirat+0x135/0x260 fs/namei.c:5164
__do_sys_mkdirat fs/namei.c:5186 [inline]
__se_sys_mkdirat fs/namei.c:5184 [inline]
__x64_sys_mkdirat+0x27/0x40 fs/namei.c:5184
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0x2d0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3f52185d29
RSP: 002b:00007f3f53047038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f3f52375fa0 RCX: 00007f3f52185d29
RDX: 00000000000001c0 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007f3f52201b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3f52375fa0 R15: 00007ffec5ba6ac8
Showing all locks held in the system:
3 locks held by kworker/0:0/9:
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340
#1: ffffc9000009be48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc9000009be48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340
#2: ffff8881057e15f8 (sb_internal#2){....}-{0:0}, at: nilfs_evict_inode+0x95/0x180 fs/nilfs2/inode.c:868
3 locks held by kworker/0:1/10:
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340
#1: ffffc900000a3e48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc900000a3e48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340
#2: ffff8881046f65f8 (sb_internal#2){....}-{0:0}, at: nilfs_evict_inode+0x95/0x180 fs/nilfs2/inode.c:868
3 locks held by kworker/1:0/24:
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340
#1: ffffc9000011be48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc9000011be48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340
#2: ffff888120ee05f8 (sb_internal#2){....}-{0:0}, at: nilfs_evict_inode+0x95/0x180 fs/nilfs2/inode.c:868
1 lock held by khungtaskd/31:
#0: ffffffff8397d7a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8397d7a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8397d7a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6775
3 locks held by kworker/1:1/40:
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340
#1: ffffc900001afe48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc900001afe48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340
#2: ffff8881046f25f8 (sb_internal#2){....}-{0:0}, at: nilfs_evict_inode+0x95/0x180 fs/nilfs2/inode.c:868
3 locks held by kworker/1:2/1707:
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340
#1: ffffc90002fdfe48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc90002fdfe48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340
#2: ffff8881057e65f8 (sb_internal#2){....}-{0:0}, at: nilfs_evict_inode+0x95/0x180 fs/nilfs2/inode.c:868
2 locks held by getty/1876:
#0: ffff8881416f30a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc90003f832f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c4/0x700 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:3/3309:
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340
#1: ffffc90002a67e48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc90002a67e48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340
#2: ffff8881106335f8 (sb_internal#2){....}-{0:0}, at: nilfs_evict_inode+0x95/0x180 fs/nilfs2/inode.c:868
4 locks held by syz.6.74/5103:
#0: ffff8881046f6408 (sb_writers#12){....}-{0:0}, at: filename_create+0x80/0x150 fs/namei.c:4872
#1: ffff8881116f3160 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff8881116f3160 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: __start_dirop fs/namei.c:2864 [inline]
#1: ffff8881116f3160 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: start_dirop fs/namei.c:2875 [inline]
#1: ffff8881116f3160 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: filename_create+0xbe/0x150 fs/namei.c:4879
#2: ffff8881046f65f8 (sb_internal#2){....}-{0:0}, at: nilfs_mkdir+0x4e/0x170 fs/nilfs2/namei.c:228
#3: ffff888107f022a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_begin+0x169/0x330 fs/nilfs2/segment.c:221
1 lock held by segctord/5114:
#0: ffff888107f022a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_lock+0x8d/0x220 fs/nilfs2/segment.c:357
4 locks held by syz.5.486/6490:
#0: ffff8881046f2408 (sb_writers#12){....}-{0:0}, at: filename_create+0x80/0x150 fs/namei.c:4872
#1: ffff8881116ff780 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff8881116ff780 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: __start_dirop fs/namei.c:2864 [inline]
#1: ffff8881116ff780 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: start_dirop fs/namei.c:2875 [inline]
#1: ffff8881116ff780 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: filename_create+0xbe/0x150 fs/namei.c:4879
#2: ffff8881046f25f8 (sb_internal#2){....}-{0:0}, at: nilfs_mkdir+0x4e/0x170 fs/nilfs2/namei.c:228
#3: ffff8881131e42a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_begin+0x169/0x330 fs/nilfs2/segment.c:221
1 lock held by segctord/6493:
#0: ffff8881131e42a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_lock+0x8d/0x220 fs/nilfs2/segment.c:357
4 locks held by syz.2.523/6702:
#0: ffff8881057e1408 (sb_writers#12){....}-{0:0}, at: filename_create+0x80/0x150 fs/namei.c:4872
#1: ffff88810a090e50 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff88810a090e50 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: __start_dirop fs/namei.c:2864 [inline]
#1: ffff88810a090e50 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: start_dirop fs/namei.c:2875 [inline]
#1: ffff88810a090e50 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: filename_create+0xbe/0x150 fs/namei.c:4879
#2: ffff8881057e15f8 (sb_internal#2){....}-{0:0}, at: nilfs_mkdir+0x4e/0x170 fs/nilfs2/namei.c:228
#3: ffff8881131e0aa0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_begin+0x169/0x330 fs/nilfs2/segment.c:221
1 lock held by segctord/6709:
#0: ffff8881131e0aa0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_lock+0x8d/0x220 fs/nilfs2/segment.c:357
4 locks held by syz.7.926/8646:
#0: ffff8881057e6408 (sb_writers#12){....}-{0:0}, at: filename_create+0x80/0x150 fs/namei.c:4872
#1: ffff88810b278878 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff88810b278878 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: __start_dirop fs/namei.c:2864 [inline]
#1: ffff88810b278878 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: start_dirop fs/namei.c:2875 [inline]
#1: ffff88810b278878 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: filename_create+0xbe/0x150 fs/namei.c:4879
#2: ffff8881057e65f8 (sb_internal#2){....}-{0:0}, at: nilfs_mkdir+0x4e/0x170 fs/nilfs2/namei.c:228
#3: ffff888109b64aa0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_begin+0x169/0x330 fs/nilfs2/segment.c:221
1 lock held by segctord/8656:
#0: ffff888109b64aa0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_lock+0x8d/0x220 fs/nilfs2/segment.c:357
3 locks held by kworker/0:4/9235:
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340
#1: ffffc90004f7be48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc90004f7be48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340
#2: ffff8881106305f8 (sb_internal#2){....}-{0:0}, at: nilfs_evict_inode+0x95/0x180 fs/nilfs2/inode.c:868
3 locks held by kworker/1:4/9505:
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340
#1: ffffc9000521be48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc9000521be48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340
#2: ffff88810e9e85f8 (sb_internal#2){....}-{0:0}, at: nilfs_evict_inode+0x95/0x180 fs/nilfs2/inode.c:868
4 locks held by syz.9.1340/10381:
#0: ffff888110633408 (sb_writers#12){....}-{0:0}, at: filename_create+0x80/0x150 fs/namei.c:4872
#1: ffff88811159a5b0 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff88811159a5b0 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: __start_dirop fs/namei.c:2864 [inline]
#1: ffff88811159a5b0 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: start_dirop fs/namei.c:2875 [inline]
#1: ffff88811159a5b0 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: filename_create+0xbe/0x150 fs/namei.c:4879
#2: ffff8881106335f8 (sb_internal#2){....}-{0:0}, at: nilfs_mkdir+0x4e/0x170 fs/nilfs2/namei.c:228
#3: ffff888114bfaaa0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_begin+0x169/0x330 fs/nilfs2/segment.c:221
1 lock held by segctord/10391:
#0: ffff888114bfaaa0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_lock+0x8d/0x220 fs/nilfs2/segment.c:357
4 locks held by syz.1.1403/10739:
#0: ffff888110630408 (sb_writers#12){....}-{0:0}, at: filename_create+0x80/0x150 fs/namei.c:4872
#1: ffff8881115a6bd0 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff8881115a6bd0 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: __start_dirop fs/namei.c:2864 [inline]
#1: ffff8881115a6bd0 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: start_dirop fs/namei.c:2875 [inline]
#1: ffff8881115a6bd0 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: filename_create+0xbe/0x150 fs/namei.c:4879
#2: ffff8881106305f8 (sb_internal#2){....}-{0:0}, at: nilfs_mkdir+0x4e/0x170 fs/nilfs2/namei.c:228
#3: ffff888114bf82a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_begin+0x169/0x330 fs/nilfs2/segment.c:221
1 lock held by segctord/10748:
#0: ffff888114bf82a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_lock+0x8d/0x220 fs/nilfs2/segment.c:357
4 locks held by syz.4.1782/12365:
#0: ffff88810e9e8408 (sb_writers#12){....}-{0:0}, at: filename_create+0x80/0x150 fs/namei.c:4872
#1: ffff888111700878 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff888111700878 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: __start_dirop fs/namei.c:2864 [inline]
#1: ffff888111700878 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: start_dirop fs/namei.c:2875 [inline]
#1: ffff888111700878 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: filename_create+0xbe/0x150 fs/namei.c:4879
#2: ffff88810e9e85f8 (sb_internal#2){....}-{0:0}, at: nilfs_mkdir+0x4e/0x170 fs/nilfs2/namei.c:228
#3: ffff8881132962a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_begin+0x169/0x330 fs/nilfs2/segment.c:221
1 lock held by segctord/12382:
#0: ffff8881132962a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_lock+0x8d/0x220 fs/nilfs2/segment.c:357
4 locks held by syz.0.1839/12823:
#0: ffff888120ee0408 (sb_writers#12){....}-{0:0}, at: filename_create+0x80/0x150 fs/namei.c:4872
#1: ffff888111701a00 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff888111701a00 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: __start_dirop fs/namei.c:2864 [inline]
#1: ffff888111701a00 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: start_dirop fs/namei.c:2875 [inline]
#1: ffff888111701a00 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: filename_create+0xbe/0x150 fs/namei.c:4879
#2: ffff888120ee05f8 (sb_internal#2){....}-{0:0}, at: nilfs_mkdir+0x4e/0x170 fs/nilfs2/namei.c:228
#3: ffff888120dadaa0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_begin+0x169/0x330 fs/nilfs2/segment.c:221
1 lock held by segctord/12839:
#0: ffff888120dadaa0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_lock+0x8d/0x220 fs/nilfs2/segment.c:357
1 lock held by syz-executor/13423:
#0: ffffffff8397e778 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#0: ffffffff8397e778 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x179/0x620 kernel/rcu/tree_exp.h:956
3 locks held by kworker/1:7/15771:
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
#0: ffff88810006ad48 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340
#1: ffffc900079ebe48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
#1: ffffc900079ebe48 ((work_completion)(&sci->sc_iput_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340
#2: ffff88810e1fb5f8 (sb_internal#2){....}-{0:0}, at: nilfs_evict_inode+0x95/0x180 fs/nilfs2/inode.c:868
4 locks held by syz.8.3106/17587:
#0: ffff88810e1fb408 (sb_writers#12){....}-{0:0}, at: filename_create+0x80/0x150 fs/namei.c:4872
#1: ffff8881116f71a8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff8881116f71a8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: __start_dirop fs/namei.c:2864 [inline]
#1: ffff8881116f71a8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: start_dirop fs/namei.c:2875 [inline]
#1: ffff8881116f71a8 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: filename_create+0xbe/0x150 fs/namei.c:4879
#2: ffff88810e1fb5f8 (sb_internal#2){....}-{0:0}, at: nilfs_mkdir+0x4e/0x170 fs/nilfs2/namei.c:228
#3: ffff888114ba22a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_begin+0x169/0x330 fs/nilfs2/segment.c:221
1 lock held by segctord/17595:
#0: ffff888114ba22a0 (&nilfs->ns_segctor_sem){....}-{3:3}, at: nilfs_transaction_lock+0x8d/0x220 fs/nilfs2/segment.c:357
6 locks held by syz-executor/19217:
#0: ffff888103fba408 (sb_writers#9){....}-{0:0}, at: ksys_write+0x74/0xf0 fs/read_write.c:738
#1: ffff888121afe088 (&of->mutex){....}-{3:3}, at: kernfs_fop_write_iter+0xcd/0x1c0 fs/kernfs/file.c:343
#2: ffffffff8398c2b0 (cgroup_mutex){....}-{3:3}, at: cgroup_lock include/linux/cgroup.h:394 [inline]
#2: ffffffff8398c2b0 (cgroup_mutex){....}-{3:3}, at: cgroup_kn_lock_live+0xaa/0x100 kernel/cgroup/cgroup.c:1735
#3: ffffffff8388c768 (cpu_hotplug_lock){....}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2542 [inline]
#3: ffffffff8388c768 (cpu_hotplug_lock){....}-{0:0}, at: cgroup_procs_write_start+0x1ae/0x2a0 kernel/cgroup/cgroup.c:3106
#4: ffffffff8398c4c8 (cgroup_threadgroup_rwsem){....}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2548 [inline]
#4: ffffffff8398c4c8 (cgroup_threadgroup_rwsem){....}-{0:0}, at: cgroup_procs_write_start+0x1ba/0x2a0 kernel/cgroup/cgroup.c:3106
#5: ffffffff8397e778 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#5: ffffffff8397e778 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x2df/0x620 kernel/rcu/tree_exp.h:956
2 locks held by syz.6.4136/20636:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xa2/0xf0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x109/0x170 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x95/0xb0 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0x590/0x5b0 kernel/hung_task.c:515
kthread+0x203/0x230 kernel/kthread.c:463
ret_from_fork+0xf2/0x230 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5118 Comm: udevd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0033:0x7f5f29a29b00
Code: c7 e8 64 8f ff ff 85 c0 74 10 48 8b 43 28 eb b6 66 2e 0f 1f 84 00 00 00 00 00 48 8b 04 24 48 89 43 28 eb a2 e8 f1 88 ff ff 90 <55> 53 48 89 fb 48 83 ec 08 e8 32 86 ff ff 48 85 c0 75 0d 48 83 c4
RSP: 002b:00007ffd7ba137a8 EFLAGS: 00000287
RAX: 0000000000000000 RBX: 000055fd9b049630 RCX: 00007f5f29311ad7
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000055fd9b049630
RBP: 0000000000000000 R08: 0000000000000070 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000055fd882a795f
R13: 000055fd882b8660 R14: 0000000000000000 R15: 0000000000000009
FS: 00007f5f2994d880 GS: 0000000000000000