ci starts bisection 2023-12-20 15:00:17.570855475 +0000 UTC m=+14184.829997010
bisecting fixing commit since a747acc0b752f6c3911be539a2d3ca42b4424844
building syzkaller on 59da83662ae7076f1369c8a5b9dd1245223039df
ensuring issue is reproducible on original commit a747acc0b752f6c3911be539a2d3ca42b4424844
testing commit a747acc0b752f6c3911be539a2d3ca42b4424844 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 5ec56f4fde2b973512817d97b03a8baa9a08c2dae4b7193e1bfcce8f9187d53e
all runs: crashed: INFO: task hung in hfsplus_find_init
representative crash: INFO: task hung in hfsplus_find_init, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit a747acc0b752f6c3911be539a2d3ca42b4424844 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4f6eb1f75d6237c72122a931b4859918081403528e9d00c019d880e2de135e7f
all runs: crashed: INFO: task hung in hfsplus_find_init
representative crash: INFO: task hung in hfsplus_find_init, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
kconfig minimization: base=3915 full=7686 leaves diff=2008
split chunks (needed=false): <2008>
split chunk #0 of len 2008 into 5 parts
testing without sub-chunk 1/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit a747acc0b752f6c3911be539a2d3ca42b4424844 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 33d278d238ddbc0500537064a3a2d3dd3502577b44f03572a7469503c4c7cbb7
all runs: crashed: INFO: task hung in hfsplus_find_init
representative crash: INFO: task hung in hfsplus_find_init, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit a747acc0b752f6c3911be539a2d3ca42b4424844 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 3ecfce57368d8ed5c377e0ef34f0f74cacac36a9ab2b0d6f8f80397e5a56272c
all runs: OK
false negative chance: 0.000
testing without sub-chunk 3/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit a747acc0b752f6c3911be539a2d3ca42b4424844 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d7b289697fc0c75659547f7bba9bad30e97dc41c4925eaf45062354abd07a761
all runs: crashed: INFO: task hung in hfsplus_find_init
representative crash: INFO: task hung in hfsplus_find_init, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit a747acc0b752f6c3911be539a2d3ca42b4424844 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4d275fdf14e2f6dc6e26de9aa50270b5358770cc75893a5dba09d93b9ac990be
all runs: crashed: INFO: task hung in hfsplus_find_init
representative crash: INFO: task hung in hfsplus_find_init, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit a747acc0b752f6c3911be539a2d3ca42b4424844 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: e09386172398399c5ce99a8fd401111172ce07127410f87f3eb305c4f6e8916e
all runs: crashed: INFO: task hung in hfsplus_find_init
representative crash: INFO: task hung in hfsplus_find_init, types: [HANG]
the chunk can be dropped
minimized to 402 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_DP_AUX_BUS DRM_DP_AUX_CHARDEV DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VIRTIO_GPU_KMS DRM_VKMS DRM_VMWGFX DRM_VRAM_HELPER DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB DVB_CORE DVB_DIB3000MB DVB_DIB3000MC DVB_EC100 DVB_GP8PSK_FE DVB_RTL2830 DVB_RTL2832 DVB_RTL2832_SDR DVB_TEST_DRIVERS DVB_TTUSB_BUDGET DVB_TTUSB_DEC DVB_USB DVB_USB_A800 DVB_USB_AF9005 DVB_USB_AF9005_REMOTE DVB_USB_AF9015 DVB_USB_AF9035 DVB_USB_ANYSEE DVB_USB_AU6610 DVB_USB_AZ6007 DVB_USB_AZ6027 DVB_USB_CE6230 DVB_USB_CINERGY_T2 DVB_USB_CXUSB DVB_USB_DIB0700 DVB_USB_DIB3000MC DVB_USB_DIBUSB_MB DVB_USB_DIBUSB_MC DVB_USB_DIGITV DVB_USB_DTT200U DVB_USB_DTV5100 DVB_USB_DVBSKY DVB_USB_DW2102 DVB_USB_EC168 DVB_USB_GL861 DVB_USB_GP8PSK DVB_USB_LME2510 DVB_USB_M920X DVB_USB_MXL111SF DVB_USB_NOVA_T_USB2 DVB_USB_OPERA1 DVB_USB_PCTV452E DVB_USB_RTL28XXU DVB_USB_TECHNISAT_USB2 DVB_USB_TTUSB2 DVB_USB_UMT_010 DVB_USB_V2 DVB_USB_VP702X DVB_USB_VP7045 DVB_USB_ZD1301 DVB_VIDTV DVB_ZL10353 ECRYPT_FS ECRYPT_FS_MESSAGING EDAC EEPROM_93CX6 EFS_FS ENCRYPTED_KEYS EQUALIZER EROFS_FS EROFS_FS_POSIX_ACL EROFS_FS_SECURITY EROFS_FS_XATTR EROFS_FS_ZIP EVM EVM_ADD_XATTRS EVM_ATTR_FSUUID EVM_EXTRA_SMACK_XATTRS EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXTCON EXTCON_INTEL_CHT_WC F2FS_CHECK_FS F2FS_FAULT_INJECTION F2FS_FS F2FS_FS_COMPRESSION F2FS_FS_LZ4 F2FS_FS_LZ4HC F2FS_FS_LZO F2FS_FS_LZORLE F2FS_FS_POSIX_ACL F2FS_FS_SECURITY F2FS_FS_XATTR F2FS_FS_ZSTD F2FS_STAT_FS FANOTIFY FANOTIFY_ACCESS_PERMISSIONS FB FB_CFB_COPYAREA FB_CFB_FILLRECT FB_CFB_IMAGEBLIT FB_CORE FB_DEFERRED_IO FB_DEVICE FB_IOMEM_HELPERS FB_NOTIFY FB_SYSMEM_HELPERS FB_SYSMEM_HELPERS_DEFERRED FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VESA FB_VGA16 FB_VIRTUAL FDDI FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FONT_8x16 FONT_8x8 FONT_SUPPORT FRAMEBUFFER_CONSOLE FRAMEBUFFER_CONSOLE_DETECT_PRIMARY FRAMEBUFFER_CONSOLE_ROTATION FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FUSE_DAX FUSE_FS FW_LOADER_COMPRESS FW_LOADER_PAGED_BUF FW_LOADER_SYSFS FW_LOADER_USER_HELPER FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GARP GENERIC_PHY GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GUEST_PERF_EVENTS GVE HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_EVENTFD HAVE_KVM_IRQCHIP HAVE_KVM_IRQFD HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_SCHED_AVG_IRQ HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS HID_ACCUTOUCH HID_ACRUX HID_ACRUX_FF HID_ALPS HID_APPLEIR HID_ASUS HID_AUREAL HID_BATTERY_STRENGTH HID_BETOP_FF HID_CMEDIA HID_CORSAIR HID_CP2112 HID_ELECOM HID_ELO HID_EMS_FF HID_GEMBIRD HID_GFRM HID_GREENASIA HID_GT683R 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_MULTITOUCH HID_NTI HID_ORTEK HID_PENMOUNT HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_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_THINGM HID_TIVO HID_TWINHAN HID_UCLOGIC HID_UDRAW_PS3 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_DESIGNWARE_CORE I2C_DESIGNWARE_PLATFORM I2C_DIOLAN_U2C I2C_DLN2 I2C_MUX I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB IIO IIO_BUFFER IIO_KFIFO_BUF IIO_TRIGGER IIO_TRIGGERED_BUFFER IKCONFIG IKCONFIG_PROC IMA IMA_DEFAULT_HASH_SHA256 IMA_LSM_RULES IMA_MEASURE_ASYMMETRIC_KEYS IMA_NG_TEMPLATE IMA_QUEUE_EARLY_BOOT_KEYS IMA_READ_POLICY IMA_WRITE_POLICY INET6_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DCCP_DIAG INET_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_DIAG INET_TCP_DIAG INET_UDP_DIAG INET_XFRM_TUNNEL INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_ADDR_TRANS_CONFIGFS INFINIBAND_IPOIB INFINIBAND_IPOIB_CM INFINIBAND_IPOIB_DEBUG INFINIBAND_ISER INFINIBAND_ON_DEMAND_PAGING INFINIBAND_RTRS INFINIBAND_SRP INFINIBAND_USER_ACCESS INFINIBAND_USER_MAD INFINIBAND_USER_MEM INPUT_ATI_REMOTE2 INPUT_CM109 INPUT_IMS_PCU INPUT_JOYDEV INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_UINPUT INPUT_YEALINK INTEGRITY INTEGRITY_ASYMMETRIC_KEYS INTEGRITY_AUDIT INTEGRITY_SIGNATURE INTEGRITY_TRUSTED_KEYRING INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_ISH_HID INTEL_SOC_PMIC_CHTWC INTERVAL_TREE INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_TEST IOMMU_SVA IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_NAT IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL IP6_NF_TARGET_MASQUERADE IP6_NF_TARGET_NPT IP6_NF_TARGET_SYNPROXY IPV6_FOU IPV6_FOU_TUNNEL IPV6_GRE IPV6_ILA IPV6_MIP6 IPV6_MROUTE IPV6_MROUTE_MULTIPLE_TABLES IPV6_MULTIPLE_TABLES IPV6_OPTIMISTIC_DAD IPV6_PIMSM_V2 IPV6_ROUTER_PREF IPV6_ROUTE_INFO IPV6_RPL_LWTUNNEL IPV6_SEG6_BPF IPV6_SEG6_HMAC IPV6_SEG6_LWTUNNEL IPV6_SIT_6RD IPV6_SUBTREES IPV6_TUNNEL IPV6_VTI IPVLAN IPVLAN_L3S IPVTAP IP_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS IP_MROUTE_MULTIPLE_TABLES IP_NF_ARPFILTER IP_NF_ARPTABLES IP_NF_ARP_MANGLE IP_NF_MATCH_AH IP_NF_MATCH_ECN IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_RAW IP_NF_SECURITY IP_NF_TARGET_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID IP_SCTP IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC IP_SET_BITMAP_PORT IP_SET_HASH_IP IP_SET_HASH_IPMAC IP_SET_HASH_IPMARK IP_SET_HASH_IPPORT IP_SET_HASH_IPPORTIP IP_SET_HASH_IPPORTNET IP_SET_HASH_MAC IP_SET_HASH_NET IP_SET_HASH_NETIFACE IP_SET_HASH_NETNET IP_SET_HASH_NETPORT IP_SET_HASH_NETPORTNET IP_SET_LIST_SET IP_VS IP_VS_DH IP_VS_FO IP_VS_FTP IP_VS_IPV6 IP_VS_LBLC IP_VS_LBLCR IP_VS_LC IP_VS_MH IP_VS_NFCT IP_VS_NQ IP_VS_OVF IP_VS_PE_SIP IP_VS_PROTO_TCP IP_VS_PROTO_UDP IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE MAC802154 MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_VIPERBOARD MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NFT_FWD_NETDEV NF_TABLES NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE]
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing current HEAD 55cb5f43689d7a9ea5bf35ef050f12334f197347
testing commit 55cb5f43689d7a9ea5bf35ef050f12334f197347 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 9c01d28fe60ef7e0299b65bbca1205d93277a1cc2358f0c83b8883b4daaca8a4
all runs: crashed: INFO: task hung in hfsplus_find_init
representative crash: INFO: task hung in hfsplus_find_init, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h13m22.384658718s (build: 1h3m53.647878094s, test: 1h3m53.029985997s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'trace-v6.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
crash: INFO: task hung in hfsplus_find_init
INFO: task kworker/u4:7:902 blocked for more than 143 seconds.
Not tainted 6.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:7 state:D stack:12264 pid:902 tgid:902 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x676/0x950 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xab/0x100 kernel/sched/core.c:6778
schedule_preempt_disabled+0x32/0x50 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x445/0x970 kernel/locking/mutex.c:747
hfsplus_find_init+0x73/0x80
hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline]
hfsplus_file_extend+0x15a/0x590 fs/hfsplus/extents.c:461
hfsplus_bmap_reserve+0x37/0xb0 fs/hfsplus/btree.c:358
__hfsplus_ext_write_extent+0x91/0xc0 fs/hfsplus/extents.c:104
hfsplus_ext_write_extent_locked fs/hfsplus/extents.c:139 [inline]
hfsplus_ext_write_extent+0xa6/0xe0 fs/hfsplus/extents.c:150
hfsplus_write_inode+0x14/0x180 fs/hfsplus/super.c:154
write_inode fs/fs-writeback.c:1473 [inline]
__writeback_single_inode+0x18f/0x3a0 fs/fs-writeback.c:1690
writeback_sb_inodes+0x2f1/0x5e0 fs/fs-writeback.c:1916
wb_writeback+0x165/0x3e0 fs/fs-writeback.c:2092
wb_do_writeback fs/fs-writeback.c:2239 [inline]
wb_workfn+0x12a/0x510 fs/fs-writeback.c:2279
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x24c/0x4d0 kernel/workqueue.c:2700
worker_thread+0x23d/0x300 kernel/workqueue.c:2781
kthread+0xe5/0x100 kernel/kthread.c:388
ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
INFO: task syz-executor.0:2137 blocked for more than 143 seconds.
Not tainted 6.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:10656 pid:2137 tgid:2137 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x676/0x950 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xab/0x100 kernel/sched/core.c:6778
wb_wait_for_completion+0x80/0xc0 fs/fs-writeback.c:192
__writeback_inodes_sb_nr fs/fs-writeback.c:2672 [inline]
writeback_inodes_sb_nr fs/fs-writeback.c:2689 [inline]
writeback_inodes_sb+0xc2/0xe0 fs/fs-writeback.c:2704
sync_filesystem+0x1e/0x80 fs/sync.c:54
generic_shutdown_super+0x25/0x110 fs/super.c:669
kill_block_super+0x16/0x40 fs/super.c:1667
deactivate_locked_super+0x30/0x110 fs/super.c:484
cleanup_mnt+0xe2/0x120 fs/namespace.c:1256
task_work_run+0x7d/0xa0 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xa9/0xc0 kernel/entry/common.c:171
exit_to_user_mode_prepare+0x64/0xb0 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x2c/0x1e0 kernel/entry/common.c:296
do_syscall_64+0x52/0xe0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f6e8bc7de17
RSP: 002b:00007ffcfb6518a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6e8bc7de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffcfb651960
RBP: 00007ffcfb651960 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcfb652a20
R13: 00007f6e8bcc73b9 R14: 000000000000b85f R15: 0000000000000004
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff831d8580 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff831d8580 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff831d8580 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x30/0x100 kernel/locking/lockdep.c:6614
6 locks held by kworker/u4:7/902:
#0: ffff888103e72738 ((wq_completion)writeback){....}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#0: ffff888103e72738 ((wq_completion)writeback){....}-{0:0}, at: process_scheduled_works+0x1f2/0x4d0 kernel/workqueue.c:2700
#1: ffffc900023efe58 ((work_completion)(&(&wb->dwork)->work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#1: ffffc900023efe58 ((work_completion)(&(&wb->dwork)->work)){....}-{0:0}, at: process_scheduled_works+0x1f2/0x4d0 kernel/workqueue.c:2700
#2: ffff888108f6a688 (&hip->extents_lock){....}-{3:3}, at: hfsplus_ext_write_extent+0x32/0xe0 fs/hfsplus/extents.c:149
#3: ffff8881007be0b0 (&tree->tree_lock/1){....}-{3:3}, at: hfsplus_find_init+0x73/0x80
#4: ffff888108f68108 (&HFSPLUS_I(inode)->extents_lock){....}-{3:3}, at: hfsplus_file_extend+0xba/0x590 fs/hfsplus/extents.c:457
#5: ffff8881007be0b0 (&tree->tree_lock/1){....}-{3:3}, at: hfsplus_find_init+0x73/0x80
2 locks held by getty/1515:
#0: ffff888107a438a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc900034e32f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x242/0x910 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.0/2137:
#0: ffff8881082f40e0 (&type->s_umount_key#48){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8881082f40e0 (&type->s_umount_key#48){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8881082f40e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x2b/0x40 fs/super.c:516
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x83/0xd0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x142/0x160 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:222 [inline]
watchdog+0x5da/0x600 kernel/hung_task.c:379
kthread+0xe5/0x100 kernel/kthread.c:388
ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 320 Comm: kworker/u4:5 Not tainted 6.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: 0x0 (events_unbound)
RIP: 0010:dequeue_task_fair+0x0/0x860 kernel/sched/fair.c:6754
Code: 48 89 ef be 01 00 00 00 e8 dd 9e ff ff 83 fb 01 0f 86 52 ff ff ff e9 67 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 30 89 54 24 0c
RSP: 0018:ffffc90001877e20 EFLAGS: 00000046
RAX: ffffffff82e3a810 RBX: ffff88810ee421d0 RCX: 0000000000000000
RDX: 0000000000000009 RSI: ffff88810ee41b00 RDI: ffff888237d2d800
RBP: ffffc90001877e98 R08: 000003fffffffc00 R09: ffff888237d2d800
R10: 000003fffffffc00 R11: 0000000000000001 R12: 0000000000000402
R13: ffff88810ee41b00 R14: ffff888237d2d800 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1174f3c4d8 CR3: 00000000030a8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
dequeue_task kernel/sched/core.c:2115 [inline]
deactivate_task kernel/sched/core.c:2134 [inline]
__schedule+0x1cd/0x950 kernel/sched/core.c:6642
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xab/0x100 kernel/sched/core.c:6778
worker_thread+0x79/0x300 kernel/workqueue.c:2796
kthread+0xe5/0x100 kernel/kthread.c:388
ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242