ci2 starts bisection 2025-09-25 11:36:43.783311152 +0000 UTC m=+111569.438174809
bisecting fixing commit since 0bc96de781b4da716c8dbd248af4b26d8d8341f5
building syzkaller on bf27483f963359281b2d9b6d6efd36289f82e282
ensuring issue is reproducible on original commit 0bc96de781b4da716c8dbd248af4b26d8d8341f5
testing commit 0bc96de781b4da716c8dbd248af4b26d8d8341f5 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 7ac793075176116d4bd4086c995399fdf97f0b5cb3fb1c13075d3cc8760f488e
all runs: crashed: INFO: task hung in xfs_buf_item_unpin
representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit 0bc96de781b4da716c8dbd248af4b26d8d8341f5 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 64de55d3177e5c21388a829d0ac25094acd16dbf652711c158477a64ad3ca26a
all runs: crashed: INFO: task hung in xfs_buf_item_unpin
representative crash: INFO: task hung in xfs_buf_item_unpin, 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=3829 full=7618 leaves diff=2128
split chunks (needed=false): <2128>
split chunk #0 of len 2128 into 5 parts
testing without sub-chunk 1/5
disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed
testing commit 0bc96de781b4da716c8dbd248af4b26d8d8341f5 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 3a4f62034ed184bae8f7e6951e8b969c1639a6444df143054ad201d3b3ce64af
all runs: crashed: INFO: task hung in xfs_buf_item_unpin
representative crash: INFO: task hung in xfs_buf_item_unpin, 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 0bc96de781b4da716c8dbd248af4b26d8d8341f5 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 4896ea8675c30cb75d980a03e7c274ebba983994ded1cd78c8396991e08944d1
all runs: crashed: INFO: task hung in xfs_buf_item_unpin
representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 0bc96de781b4da716c8dbd248af4b26d8d8341f5 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 1fa7396a28585e7118aaa6e98f67d8a889ab985f6ee3b905e097ed205ae397df
all runs: crashed: INFO: task hung in xfs_buf_item_unpin
representative crash: INFO: task hung in xfs_buf_item_unpin, 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 0bc96de781b4da716c8dbd248af4b26d8d8341f5 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 3cd4bb47aab976d5bea15aedc9a5ec1d64f227e0fa4749e6f5cade2fcad199af
all runs: crashed: INFO: task hung in xfs_buf_item_unpin
representative crash: INFO: task hung in xfs_buf_item_unpin, 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 0bc96de781b4da716c8dbd248af4b26d8d8341f5 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: b67722431a94c60d01229103607c9dfbee3b47880ad9c9ed8d91eb3314ac8782
all runs: OK
false negative chance: 0.000
minimized to 424 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB GPIOLIB HID_ZEROPLUS I2C_MUX IIO 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_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_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_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_FOTG210_HCD USB_FOTG210_UDC USB_FTDI_ELAN USB_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI 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_GPIO_VBUS 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_MV_U3D USB_MV_UDC USB_NET2272 USB_NET2272_DMA 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_RNDIS_WLAN 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_U132_HCD 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 U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_IOMMU_TYPE1 VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_VDPA VHOST_VSOCK 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_STK1160_COMMON 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 VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_X2APIC XARRAY_MULTI 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 ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD]
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing current HEAD 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4
testing commit 7b34dc04e4ff0f37ba4ad8414f42abae9f8f68e4 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: ba347ae9ba9fe53455a9ee7a05a2f48adc8643de13f8f5c8dc0fb30556888a45
all runs: crashed: INFO: task hung in xfs_buf_item_unpin
representative crash: INFO: task hung in xfs_buf_item_unpin, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h53m41.187314227s (build: 33m48.794267646s, test: 1h17m17.688093364s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.1.154
crash: INFO: task hung in xfs_buf_item_unpin
INFO: task kworker/u4:7:2643 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:7 state:D stack:12568 pid:2643 ppid:2 flags:0x00004000
Workqueue: xfs-cil/loop3 xlog_cil_push_work
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x56d/0x870 kernel/sched/core.c:6561
schedule+0x50/0xb0 kernel/sched/core.c:6637
schedule_timeout+0x29/0x180 kernel/time/timer.c:1941
___down_common kernel/locking/semaphore.c:229 [inline]
__down_common+0xf1/0x220 kernel/locking/semaphore.c:250
down+0x38/0x40 kernel/locking/semaphore.c:64
xfs_buf_lock+0x4d/0x110 fs/xfs/xfs_buf.c:1120
xfs_buf_item_unpin+0x81/0x1c0 fs/xfs/xfs_buf_item.c:582
xfs_trans_committed_bulk+0x12b/0x2e0 fs/xfs/xfs_trans.c:808
xlog_cil_committed+0xa3/0x340 fs/xfs/xfs_log_cil.c:795
xlog_cil_push_work+0x991/0xa80 fs/xfs/xfs_log_cil.c:1405
process_one_work+0x27d/0x4c0 kernel/workqueue.c:2292
worker_thread+0x236/0x3a0 kernel/workqueue.c:2439
kthread+0xcc/0xe0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz.3.48:4479 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.48 state:D stack:14640 pid:4479 ppid:2935 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x56d/0x870 kernel/sched/core.c:6561
schedule+0x50/0xb0 kernel/sched/core.c:6637
schedule_timeout+0x29/0x180 kernel/time/timer.c:1941
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common+0xf8/0x1b0 kernel/sched/completion.c:117
__flush_workqueue+0x2fd/0x590 kernel/workqueue.c:2864
xlog_cil_push_now fs/xfs/xfs_log_cil.c:1521 [inline]
xlog_cil_force_seq+0x94/0x2a0 fs/xfs/xfs_log_cil.c:1723
xfs_log_force_seq+0x87/0x170 fs/xfs/xfs_log.c:3370
__xfs_trans_commit+0x2c7/0x360 fs/xfs/xfs_trans.c:1013
xfs_sync_sb_buf+0x64/0xa0 fs/xfs/libxfs/xfs_sb.c:1162
xfs_ioc_setlabel fs/xfs/xfs_ioctl.c:1827 [inline]
xfs_file_ioctl+0x47a/0xc90 fs/xfs/xfs_ioctl.c:1925
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0x65/0xb0 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fad7318ebe9
RSP: 002b:00007fad72fde038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fad733b6090 RCX: 00007fad7318ebe9
RDX: 0000200000000100 RSI: 0000000041009432 RDI: 0000000000000004
RBP: 00007fad73211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fad733b6128 R14: 00007fad733b6090 R15: 00007ffd84c2e308
Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
#0: ffff8881297f7d38 ((wq_completion)xfs-cil/loop5){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
#1: ffffc90000053e68 ((work_completion)(&ctx->push_work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff831859e8 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_one_gp kernel/rcu/tasks.h:517 [inline]
#0: ffffffff831859e8 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_kthread+0x97/0x4c0 kernel/rcu/tasks.h:562
1 lock held by rcu_tasks_trace/13:
#0: ffffffff83186010 (rcu_tasks_trace.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_one_gp kernel/rcu/tasks.h:517 [inline]
#0: ffffffff83186010 (rcu_tasks_trace.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_kthread+0x97/0x4c0 kernel/rcu/tasks.h:562
2 locks held by kworker/0:1/17:
#0: ffff888100062538 ((wq_completion)events){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
#1: ffffc90000093e68 ((work_completion)(&pwq->unbound_release_work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
3 locks held by kworker/1:1/27:
#0: ffff888100062538 ((wq_completion)events){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
#1: ffffc900000efe68 ((work_completion)(&pwq->unbound_release_work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
#2: ffffffff83186a78 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#2: ffffffff83186a78 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x220/0x750 kernel/rcu/tree_exp.h:962
1 lock held by khungtaskd/28:
#0: ffffffff831857a8 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff831857a8 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff831857a8 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2a/0xf0 kernel/locking/lockdep.c:6513
2 locks held by kworker/0:2/999:
#0: ffff888129753f38 ((wq_completion)xfs-sync/loop5){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
#1: ffffc90001a1be68 ((work_completion)(&(&log->l_work)->work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
2 locks held by kworker/0:3/1599:
#0: ffff888124b84938 ((wq_completion)xfs-sync/loop3){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
#1: ffffc900080a3e68 ((work_completion)(&(&log->l_work)->work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
2 locks held by getty/1953:
#0: ffff8881001a6898 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x1c/0x40 drivers/tty/tty_ldisc.c:244
#1: ffffc900080af2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x19e/0x6d0 drivers/tty/n_tty.c:2198
2 locks held by kworker/u4:7/2643:
#0: ffff888124c68938 ((wq_completion)xfs-cil/loop3){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
#1: ffffc90000ecbe68 ((work_completion)(&ctx->push_work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
1 lock held by syz-executor/2927:
#0: ffff88812c0bb0e0 (&type->s_umount_key#46){....}-{3:3}, at: deactivate_super+0x2a/0x40 fs/super.c:362
1 lock held by syz.3.48/4479:
#0: ffff888123a6e438 (sb_writers#13){....}-{0:0}, at: xfs_ioc_setlabel fs/xfs/xfs_ioctl.c:1809 [inline]
#0: ffff888123a6e438 (sb_writers#13){....}-{0:0}, at: xfs_file_ioctl+0x432/0xc90 fs/xfs/xfs_ioctl.c:1925
2 locks held by kworker/1:4/4737:
#0: ffff888100063138 ((wq_completion)rcu_gp){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
#1: ffffc900080f7e68 ((work_completion)(&rew->rew_work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
1 lock held by syz.5.227/6567:
#0: ffff888123a6b438 (sb_writers#13){....}-{0:0}, at: xfs_ioc_setlabel fs/xfs/xfs_ioctl.c:1809 [inline]
#0: ffff888123a6b438 (sb_writers#13){....}-{0:0}, at: xfs_file_ioctl+0x432/0xc90 fs/xfs/xfs_ioctl.c:1925
1 lock held by syz.4.356/8019:
#0: ffff888123a6f438 (sb_writers#13){....}-{0:0}, at: xfs_ioc_setlabel fs/xfs/xfs_ioctl.c:1809 [inline]
#0: ffff888123a6f438 (sb_writers#13){....}-{0:0}, at: xfs_file_ioctl+0x432/0xc90 fs/xfs/xfs_ioctl.c:1925
1 lock held by syz-executor/9212:
#0: ffff88812c2e60e0 (&type->s_umount_key#46){....}-{3:3}, at: deactivate_super+0x2a/0x40 fs/super.c:362
2 locks held by kworker/0:7/10408:
#0: ffff888100062538 ((wq_completion)events){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
#1: ffffc9000a753e68 ((work_completion)(&pwq->unbound_release_work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267
1 lock held by syz.7.770/12755:
#0: ffff88812c0be438 (sb_writers#13){....}-{0:0}, at: xfs_ioc_setlabel fs/xfs/xfs_ioctl.c:1809 [inline]
#0: ffff88812c0be438 (sb_writers#13){....}-{0:0}, at: xfs_file_ioctl+0x432/0xc90 fs/xfs/xfs_ioctl.c:1925
1 lock held by syz-executor/13873:
#0: ffff88812e1a80e0 (&type->s_umount_key#46){....}-{3:3}, at: deactivate_super+0x2a/0x40 fs/super.c:362
1 lock held by syz.1.912/14483:
#0: ffff88811cb06438 (sb_writers#13){....}-{0:0}, at: xfs_ioc_setlabel fs/xfs/xfs_ioctl.c:1809 [inline]
#0: ffff88811cb06438 (sb_writers#13){....}-{0:0}, at: xfs_file_ioctl+0x432/0xc90 fs/xfs/xfs_ioctl.c:1925
1 lock held by syz-executor/15581:
#0: ffff88812d7160e0 (&type->s_umount_key#46){....}-{3:3}, at: deactivate_super+0x2a/0x40 fs/super.c:362
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x74/0xbb lib/dump_stack.c:106
nmi_cpu_backtrace+0x102/0x160 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0xa5/0x160 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0x533/0x560 kernel/hung_task.c:377
kthread+0xcc/0xe0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:741