ci2 starts bisection 2025-11-25 10:36:00.248480994 +0000 UTC m=+34296.897586297
bisecting fixing commit since 971199ad2a0f1b2fbe14af13369704aff2999988
building syzkaller on 7e2882b32698b70f3149aee00c41e3d2d941dca3
ensuring issue is reproducible on original commit 971199ad2a0f1b2fbe14af13369704aff2999988
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 05e3c1ebdf7ca5abd2087b4effe812dc727472b2e0235228871853770550ba26
run #0: crashed: INFO: task hung in xlog_force_lsn
run #1: crashed: INFO: task hung in xlog_force_lsn
run #2: crashed: INFO: task hung in xfs_buf_item_unpin
run #3: crashed: INFO: task hung in xlog_force_lsn
run #4: crashed: INFO: task hung in xlog_force_lsn
run #5: crashed: INFO: task hung in xlog_force_lsn
run #6: crashed: INFO: task hung in xlog_force_lsn
run #7: crashed: INFO: task hung in xlog_force_lsn
run #8: crashed: INFO: task hung in xlog_force_lsn
run #9: crashed: INFO: task hung in xlog_force_lsn
run #10: crashed: INFO: task hung in xlog_force_lsn
run #11: crashed: INFO: task hung in xlog_force_lsn
run #12: crashed: INFO: task hung in xfs_buf_item_unpin
run #13: crashed: INFO: task hung in xlog_force_lsn
run #14: crashed: INFO: task hung in xlog_force_lsn
run #15: crashed: INFO: task hung in xlog_force_lsn
run #16: crashed: INFO: task hung in xfs_buf_item_unpin
run #17: crashed: INFO: task hung in xlog_force_lsn
run #18: crashed: INFO: task hung in xlog_force_lsn
run #19: crashed: INFO: task hung in xlog_force_lsn
representative crash: INFO: task hung in xlog_force_lsn, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 5f5d85bf9a23999148629bb7be356186525c0adbcc4a9a286fe7ac0f37e1a8b4
run #0: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #1: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #2: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #3: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #4: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #5: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #6: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #7: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #8: crashed: INFO: task hung in xfs_log_force_seq
run #9: crashed: BUG: MAX_LOCKDEP_KEYS too low!
representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN]
the bug reproduces without the instrumentation
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
kconfig minimization: base=4109 full=8373 leaves diff=2119
split chunks (needed=false): <2119>
split chunk #0 of len 2119 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 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: c38bca4afa1633b953e5981d4245b30a2bd7797903cbd3e5e8f40b70370b22d4
all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low!
representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 8f73f9a11f1228231f371436805eda9d464e1089303ea9ad9128f5d1116eab01
run #0: crashed: INFO: task hung in xfs_log_force_seq
run #1: crashed: INFO: task hung in xfs_log_force_seq
run #2: crashed: INFO: task hung in xfs_log_force_seq
run #3: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #4: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #5: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #6: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #7: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #8: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #9: crashed: BUG: MAX_LOCKDEP_KEYS too low!
representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: a6c2ba89b686c685b07cfda4c2d9d00e3c73e6df741c78858aa5bf1fb1c307dd
run #0: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #1: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #2: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #3: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #4: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #5: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #6: crashed: INFO: task hung in xfs_log_force_seq
run #7: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #8: crashed: BUG: MAX_LOCKDEP_KEYS too low!
run #9: crashed: BUG: MAX_LOCKDEP_KEYS too low!
representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN]
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 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 4a5a214344aa4165c9e591567e6a6621545346797036049dc7af40760c17e125
run #0: crashed: INFO: task hung in xfs_log_force_seq
run #1: crashed: INFO: task hung in xfs_log_force_seq
run #2: crashed: INFO: task hung in xfs_log_force_seq
run #3: crashed: INFO: task hung in xfs_buf_item_unpin
run #4: crashed: INFO: task hung in xfs_log_force_seq
run #5: crashed: INFO: task hung in xfs_log_force_seq
run #6: crashed: INFO: task hung in xfs_log_force_seq
run #7: OK
run #8: OK
run #9: crashed: INFO: task hung in xfs_log_force_seq
representative crash: INFO: task hung in xfs_log_force_seq, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 9ce453664e700bbaf16ee82bd5add86a29a05295fbc8fdef57fb47a5e1578f5a
all runs: OK
false negative chance: 0.000
minimized to 423 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC DVB_CORE EXTCON GPIOLIB HID_ZEROPLUS I2C_MUX IIO IOMMUFD IRQ_REMAP KVM KVM_INTEL LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_VIPERBOARD NOP_USB_XCEIV PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RFKILL SND SOUND SPI SSB TAP TARGET_CORE TUN USB_AMD5536UDC USB_ATM USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_CDNS2_UDC USB_CDNS3 USB_CDNS3_GADGET USB_CDNS3_HOST USB_CDNS3_PCI_WRAP USB_CDNSP_GADGET USB_CDNSP_HOST USB_CDNSP_PCI USB_CDNS_HOST USB_CDNS_SUPPORT USB_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_GENERIC USB_CHIPIDEA_HOST USB_CHIPIDEA_MSM USB_CHIPIDEA_NPCM USB_CHIPIDEA_PCI USB_CHIPIDEA_UDC USB_CONFIGFS USB_CONFIGFS_ACM USB_CONFIGFS_ECM USB_CONFIGFS_ECM_SUBSET USB_CONFIGFS_EEM USB_CONFIGFS_F_FS USB_CONFIGFS_F_HID USB_CONFIGFS_F_LB_SS USB_CONFIGFS_F_MIDI USB_CONFIGFS_F_MIDI2 USB_CONFIGFS_F_PRINTER USB_CONFIGFS_F_TCM USB_CONFIGFS_F_UAC1 USB_CONFIGFS_F_UAC1_LEGACY USB_CONFIGFS_F_UAC2 USB_CONFIGFS_F_UVC USB_CONFIGFS_MASS_STORAGE USB_CONFIGFS_NCM USB_CONFIGFS_OBEX USB_CONFIGFS_PHONET USB_CONFIGFS_RNDIS USB_CONFIGFS_SERIAL USB_CONN_GPIO USB_CXACRU USB_CYPRESS_CY7C63 USB_CYTHERM USB_DSBR USB_DUMMY_HCD USB_DWC2 USB_DWC2_HOST USB_DWC2_PCI USB_DWC3 USB_DWC3_GADGET USB_DWC3_HAPS USB_DWC3_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T USB_EHCI_FSL USB_EHCI_HCD_PLATFORM USB_EHCI_ROOT_HUB_TT USB_EHSET_TEST_FIXTURE USB_EMI26 USB_EMI62 USB_EPSON2888 USB_EZUSB_FX2 USB_FEW_INIT_RETRIES USB_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI USB_F_MIDI2 USB_F_NCM USB_F_OBEX USB_F_PHONET USB_F_PRINTER USB_F_RNDIS USB_F_SERIAL USB_F_SS_LB USB_F_SUBSET USB_F_TCM USB_F_UAC1 USB_F_UAC1_LEGACY USB_F_UAC2 USB_F_UVC USB_GADGET USB_GADGETFS USB_GADGET_DEBUG_FILES USB_GADGET_DEBUG_FS USB_GL860 USB_GOKU USB_GR_UDC USB_GSPCA USB_GSPCA_BENQ USB_GSPCA_CONEX USB_GSPCA_CPIA1 USB_GSPCA_DTCS033 USB_GSPCA_ETOMS USB_GSPCA_FINEPIX USB_GSPCA_JEILINJ USB_GSPCA_JL2005BCD USB_GSPCA_KINECT USB_GSPCA_KONICA USB_GSPCA_MARS USB_GSPCA_MR97310A USB_GSPCA_NW80X USB_GSPCA_OV519 USB_GSPCA_OV534 USB_GSPCA_OV534_9 USB_GSPCA_PAC207 USB_GSPCA_PAC7302 USB_GSPCA_PAC7311 USB_GSPCA_SE401 USB_GSPCA_SN9C2028 USB_GSPCA_SN9C20X USB_GSPCA_SONIXB USB_GSPCA_SONIXJ USB_GSPCA_SPCA1528 USB_GSPCA_SPCA500 USB_GSPCA_SPCA501 USB_GSPCA_SPCA505 USB_GSPCA_SPCA506 USB_GSPCA_SPCA508 USB_GSPCA_SPCA561 USB_GSPCA_SQ905 USB_GSPCA_SQ905C USB_GSPCA_SQ930X USB_GSPCA_STK014 USB_GSPCA_STK1135 USB_GSPCA_STV0680 USB_GSPCA_SUNPLUS USB_GSPCA_T613 USB_GSPCA_TOPRO USB_GSPCA_TOUPTEK USB_GSPCA_TV8532 USB_GSPCA_VC032X USB_GSPCA_VICAM USB_GSPCA_XIRLINK_CIT USB_GSPCA_ZC3XX USB_HACKRF USB_HCD_BCMA USB_HCD_SSB USB_HSIC_USB3503 USB_HSIC_USB4604 USB_HSO USB_HUB_USB251XB USB_IDMOUSE USB_IOWARRIOR USB_IPHETH USB_ISIGHTFW USB_ISP116X_HCD USB_ISP1301 USB_ISP1760 USB_ISP1760_DUAL_ROLE USB_ISP1760_HCD USB_ISP1761_UDC USB_KAWETH USB_KC2190 USB_KEENE USB_LAN78XX USB_LCD USB_LD USB_LEDS_TRIGGER_USBPORT USB_LED_TRIG USB_LEGOTOWER USB_LGM_PHY USB_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 USB_MAX3420_UDC USB_MAX3421_HCD USB_MDC800 USB_MICROTEK USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC USB_NET2280 USB_NET_AQC111 USB_NET_AX88179_178A USB_NET_AX8817X USB_NET_CDCETHER USB_NET_CDC_EEM USB_NET_CDC_MBIM USB_NET_CDC_NCM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_CH9200 USB_NET_CX82310_ETH USB_NET_DM9601 USB_NET_GL620A USB_NET_HUAWEI_CDC_NCM USB_NET_INT51X1 USB_NET_KALMIA USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_QMI_WWAN USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_OXU210HP_HCD USB_PEGASUS USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PCI_RENESAS USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USER_RETURN_NOTIFIER UVC_COMMON U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VETH VFIO VFIO_DEVICE_CDEV VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_TASK VHOST_VDPA VHOST_VSOCK VIDEO VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VIRT_XFER_TO_GUEST_WORK VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PROC WIREGUARD WIRELESS WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS X86_64_SMP X86_FRED X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZRAM ZRAM_BACKEND_FORCE_LZO ZRAM_BACKEND_LZO ZRAM_DEF_COMP_LZO ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_842 ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON]
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing current HEAD ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d
testing commit ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 180ed141f25ad603a1ab5e54d52d9974c47f427d0762452c339219d20c91786a
run #0: crashed: INFO: task hung in xfs_log_force_seq
run #1: crashed: INFO: task hung in xfs_log_force_seq
run #2: crashed: INFO: task hung in xfs_log_force_seq
run #3: crashed: INFO: task hung in xfs_log_force_seq
run #4: crashed: INFO: task hung in xfs_log_force_seq
run #5: crashed: INFO: task hung in xfs_log_force_seq
run #6: crashed: INFO: task hung in xfs_log_force_seq
run #7: OK
run #8: OK
run #9: OK
representative crash: INFO: task hung in xfs_log_force_seq, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h48m58.099722851s (build: 1h16m51.816136718s, test: 1h18m25.951971601s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.18-rc7
crash: INFO: task hung in xfs_log_force_seq
INFO: task syz.6.66:5246 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.66 state:D stack:13352 pid:5246 tgid:5245 ppid:3624 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x73d/0xc40 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xac/0x140 kernel/sched/core.c:7026
xlog_wait fs/xfs/xfs_log_priv.h:588 [inline]
xlog_wait_on_iclog+0x14a/0x1d0 fs/xfs/xfs_log.c:841
xfs_log_force_seq+0xa7/0x180 fs/xfs/xfs_log.c:3082
__xfs_trans_commit+0x276/0x310 fs/xfs/xfs_trans.c:879
xfs_trans_commit+0x49/0x70 fs/xfs/xfs_trans.c:928
xfs_sync_sb_buf+0x99/0x110 fs/xfs/libxfs/xfs_sb.c:1472
xfs_ioc_setlabel+0xe9/0x190 fs/xfs/xfs_ioctl.c:1039
xfs_file_ioctl+0x82f/0xd00 fs/xfs/xfs_ioctl.c:1196
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0x6c/0xc0 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0e01c0eec9
RSP: 002b:00007f0e01a77038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0e01e65fa0 RCX: 00007f0e01c0eec9
RDX: 00002000000001c0 RSI: 0000000041009432 RDI: 0000000000000004
RBP: 00007f0e01c91f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0e01e66038 R14: 00007f0e01e65fa0 R15: 00007fff8a733848
INFO: task syz.6.66:5288 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.66 state:D stack:14224 pid:5288 tgid:5245 ppid:3624 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x73d/0xc40 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xac/0x140 kernel/sched/core.c:7026
schedule_timeout+0x2c/0x160 kernel/time/sleep_timeout.c:75
___down_common kernel/locking/semaphore.c:268 [inline]
__down_common+0xf3/0x240 kernel/locking/semaphore.c:293
down+0x3c/0x50 kernel/locking/semaphore.c:100
xfs_buf_lock+0x51/0x120 fs/xfs/xfs_buf.c:993
xfs_buf_item_unpin+0x85/0x1d0 fs/xfs/xfs_buf_item.c:556
xlog_cil_ail_insert fs/xfs/xfs_log_cil.c:816 [inline]
xlog_cil_committed+0x277/0x520 fs/xfs/xfs_log_cil.c:897
xlog_cil_process_committed+0x62/0x90 fs/xfs/xfs_log_cil.c:927
xlog_state_shutdown_callbacks+0x4a/0x120 fs/xfs/xfs_log.c:488
xlog_force_shutdown+0x142/0x180 fs/xfs/xfs_log.c:3520
xfs_do_force_shutdown+0x11c/0x290 fs/xfs/xfs_fsops.c:517
xfs_fs_goingdown+0x66/0xa0 fs/xfs/xfs_fsops.c:-1
xfs_file_ioctl+0xaa7/0xd00 fs/xfs/xfs_ioctl.c:1371
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0x6c/0xc0 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0e01c0eec9
RSP: 002b:00007f0e01a56038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0e01e66090 RCX: 00007f0e01c0eec9
RDX: 0000200000000080 RSI: 000000008004587d RDI: 0000000000000005
RBP: 00007f0e01c91f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0e01e66128 R14: 00007f0e01e66090 R15: 00007fff8a733848
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8378ed30 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8378ed30 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8378ed30 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:3/43:
#0: ffff88810007cd48 ((wq_completion)events_unbound#2){....}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline]
#0: ffff88810007cd48 ((wq_completion)events_unbound#2){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3346
#1: ffffc9000016fe38 ((reaper_work).work){....}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline]
#1: ffffc9000016fe38 ((reaper_work).work){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3346
2 locks held by kworker/u8:5/1760:
#0: ffff88810007cd48 ((wq_completion)events_unbound#2){....}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline]
#0: ffff88810007cd48 ((wq_completion)events_unbound#2){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3346
#1: ffffc90007ae3e38 (connector_reaper_work){....}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline]
#1: ffffc90007ae3e38 (connector_reaper_work){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3346
2 locks held by getty/2728:
#0: ffff888100aed8a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc90008f372f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c3/0x6e0 drivers/tty/n_tty.c:2222
1 lock held by syz.6.66/5246:
#0: ffff88811b8d73f8 (sb_writers#12){....}-{0:0}, at: xfs_ioc_setlabel+0x9e/0x190 fs/xfs/xfs_ioctl.c:1021
1 lock held by udevd/7574:
2 locks held by syz.1.1156/16395:
#0: ffff88811b8d60e0 (&type->s_umount_key#47/1){....}-{3:3}, at: alloc_super+0xbe/0x3a0 fs/super.c:344
#1: ffffffff836a3110 (wq_pool_mutex){....}-{3:3}, at: apply_wqattrs_lock kernel/workqueue.c:5211 [inline]
#1: ffffffff836a3110 (wq_pool_mutex){....}-{3:3}, at: __alloc_workqueue+0x312/0x8e0 kernel/workqueue.c:5766
2 locks held by syz.4.1157/16397:
#0: ffff88811b8d00e0 (&type->s_umount_key#47/1){....}-{3:3}, at: alloc_super+0xbe/0x3a0 fs/super.c:344
#1: ffff888237d2c358 (&rq->__lock){....}-{2:2}, at: raw_spin_rq_lock_nested+0x20/0x70 kernel/sched/core.c:638
2 locks held by syz.7.1160/16400:
#0: ffff888100fbe0e0 (&type->s_umount_key#47/1){....}-{3:3}, at: alloc_super+0xbe/0x3a0 fs/super.c:344
#1: ffffffff836a3110 (wq_pool_mutex){....}-{3:3}, at: apply_wqattrs_lock kernel/workqueue.c:5211 [inline]
#1: ffffffff836a3110 (wq_pool_mutex){....}-{3:3}, at: __alloc_workqueue+0x312/0x8e0 kernel/workqueue.c:5766
3 locks held by syz.5.1158/16401:
2 locks held by syz.0.1159/16403:
#0: ffff888106a850e0 (&type->s_umount_key#47/1){....}-{3:3}, at: alloc_super+0xbe/0x3a0 fs/super.c:344
#1: ffffffff836a3110 (wq_pool_mutex){....}-{3:3}, at: apply_wqattrs_lock kernel/workqueue.c:5211 [inline]
#1: ffffffff836a3110 (wq_pool_mutex){....}-{3:3}, at: __alloc_workqueue+0x312/0x8e0 kernel/workqueue.c:5766
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(none)
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]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0x573/0x5a0 kernel/hung_task.c:495
kthread+0x203/0x230 kernel/kthread.c:463
ret_from_fork+0x126/0x200 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16400 Comm: syz.7.1160 Not tainted syzkaller #0 PREEMPT(none)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:io_serial_in+0x13/0x20 drivers/tty/serial/8250/8250_port.c:400
Code: 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 89 f2 0f b6 8f f9 00 00 00 d3 e2 03 57 40 ec <0f> b6 c0 e9 c5 58 be 00 cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000a807a50 EFLAGS: 00000006
RAX: 0000000000000005 RBX: ffffffff884f4810 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: 0000000000000001 RDI: ffffffff884f4810
RBP: 0000000000000202 R08: 0000000000080000 R09: 000000000000005f
R10: 0000000000000000 R11: ffffffff81d16b40 R12: 0000000000000000
R13: 000000000000005d R14: 0000000000000001 R15: ffffffff8839d849
FS: 00007fdc506376c0(0000) GS:ffff8882b3801000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4e9dfd5000 CR3: 000000011b814000 CR4: 00000000003526f0
Call Trace:
serial_port_in include/linux/serial_core.h:806 [inline]
serial8250_console_write+0x12a/0x700 drivers/tty/serial/8250/8250_port.c:3306
console_emit_next_record kernel/printk/printk.c:3111 [inline]
console_flush_all+0x2eb/0x440 kernel/printk/printk.c:3199
__console_flush_and_unlock kernel/printk/printk.c:3258 [inline]
console_unlock+0x61/0xe0 kernel/printk/printk.c:3298
vprintk_emit+0x25f/0x3d0 kernel/printk/printk.c:2423
_printk+0x57/0x80 kernel/printk/printk.c:2448
__xfs_printk fs/xfs/xfs_message.c:24 [inline]
xfs_printk_level+0xc7/0x120 fs/xfs/xfs_message.c:44
xfs_log_mount+0x4c/0x1d0 fs/xfs/xfs_mount.h:-1
xfs_mountfs+0x3fe/0x960 fs/xfs/xfs_mount.c:1031
xfs_fs_fill_super+0x6d3/0x7d0 fs/xfs/xfs_super.c:1960
get_tree_bdev_flags+0x13c/0x1c0 fs/super.c:1698
vfs_get_tree+0x29/0xb0 fs/super.c:1758
fc_mount fs/namespace.c:1199 [inline]
do_new_mount_fc fs/namespace.c:3642 [inline]
do_new_mount+0x168/0x3b0 fs/namespace.c:3718
do_mount fs/namespace.c:4041 [inline]
__do_sys_mount fs/namespace.c:4229 [inline]
__se_sys_mount+0x144/0x1b0 fs/namespace.c:4206
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc507d066a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdc50636e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fdc50636ef0 RCX: 00007fdc507d066a
RDX: 0000200000000000 RSI: 0000200000009780 RDI: 00007fdc50636eb0
RBP: 0000200000000000 R08: 00007fdc50636ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000009780
R13: 00007fdc50636eb0 R14: 00000000000098ab R15: 0000200000005980