ci2 starts bisection 2023-10-19 08:36:58.043078934 +0000 UTC m=+224610.016861391
bisecting fixing commit since e8f60cd7db24f94f2dbed6bec30dd16a68fc0828
building syzkaller on 96166539c4c242fccd41c7316b7080377dca428b
ensuring issue is reproducible on original commit e8f60cd7db24f94f2dbed6bec30dd16a68fc0828
testing commit e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 1477597b290c06a0846daa8b70c6efe2f48bb54b2bd28edfc7e3ecd28e1bdb63
all runs: crashed: INFO: task hung in hfs_mdb_commit
representative crash: INFO: task hung in hfs_mdb_commit, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 961ecd22590e7ed87a939b913467447266804db37a7dcc0784429bca13b793a9
all runs: crashed: INFO: task hung in hfs_mdb_commit
representative crash: INFO: task hung in hfs_mdb_commit, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
kconfig minimization: base=3876 full=7555 leaves diff=2002
split chunks (needed=false): <2002>
split chunk #0 of len 2002 into 5 parts
testing without sub-chunk 1/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: bf7fd9bf3f3412592135490b93c0eb47317b9268eb30649fd98179398afe5666
run #0: crashed: INFO: task hung in corrupted
run #1: crashed: INFO: task hung in hfs_mdb_commit
run #2: crashed: INFO: task hung in hfs_mdb_commit
run #3: crashed: INFO: task hung in hfs_mdb_commit
run #4: crashed: INFO: task hung in hfs_mdb_commit
run #5: crashed: INFO: task hung in hfs_mdb_commit
run #6: crashed: INFO: task hung in hfs_mdb_commit
run #7: crashed: INFO: task hung in hfs_mdb_commit
run #8: crashed: INFO: task hung in hfs_mdb_commit
run #9: crashed: INFO: task hung in hfs_mdb_commit
representative crash: INFO: task hung in corrupted, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: a651ba4c9673db2c7148e2aa14e193bacf84ed3d35c761a9c2f793f3ac0c258f
all runs: OK
false negative chance: 0.000
testing without sub-chunk 3/5
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 65b6785c0d51519faa3e19e1ab1b8e3eacdb53e9747471cbe2555bceb28313ea
all runs: crashed: INFO: task hung in hfs_mdb_commit
representative crash: INFO: task hung in hfs_mdb_commit, 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 e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: bdb256b6c044b11d7a09b582c17579d0f814239494528844f94e7528915cb8ac
all runs: crashed: INFO: task hung in hfs_mdb_commit
representative crash: INFO: task hung in hfs_mdb_commit, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b579f575576241a6310c41c971a51d39508fccc090263e8eb0bc525fc190ccc1
all runs: crashed: INFO: task hung in hfs_mdb_commit
representative crash: INFO: task hung in hfs_mdb_commit, types: [HANG]
the chunk can be dropped
minimized to 401 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_CIRRUS_QEMU DRM_DEBUG_MM 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_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 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_CMDLINE FB_DEFERRED_IO FB_NOTIFY 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 FORTIFY_SOURCE FRAMEBUFFER_CONSOLE FRAMEBUFFER_CONSOLE_DETECT_PRIMARY FRAMEBUFFER_CONSOLE_ROTATION FRONTSWAP 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 GCC12_NO_ARRAY_BOUNDS 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_HARDENED_USERCOPY_ALLOCATOR 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_APPRAISE IMA_APPRAISE_MODSIG IMA_DEFAULT_HASH_SHA256 IMA_LSM_RULES IMA_MEASURE_ASYMMETRIC_KEYS IMA_NG_TEMPLATE IMA_QUEUE_EARLY_BOOT_KEYS IMA_READ_POLICY IMA_WRITE_POLICY INET6_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 INIT_STACK_NONE 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_SOC_PMIC_CHTWC INTERVAL_TREE INTERVAL_TREE_SPAN_ITER IOASID IOMMUFD IOMMUFD_TEST 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_CLUSTERIP 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 SECURITY_APPARMOR SND SOUND STAGING TRANSPARENT_HUGEPAGE VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE]
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing current HEAD dd72f9c7e512da377074d47d990564959b772643
testing commit dd72f9c7e512da377074d47d990564959b772643 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b92e559307dfdcfb5a688b37ac10ccf61a84f9ff06f8e3e4b7c6632dca95fcb3
all runs: crashed: INFO: task hung in hfs_mdb_commit
representative crash: INFO: task hung in hfs_mdb_commit, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h30m39.343628285s (build: 36m59.731452719s, test: 50m9.849237743s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'spi-fix-v6-6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
crash: INFO: task hung in hfs_mdb_commit
INFO: task kworker/0:1:10 blocked for more than 143 seconds.
Not tainted 6.6.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1 state:D stack:12856 pid:10 ppid:2 flags:0x00004000
Workqueue: events_long flush_mdb
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x6ad/0x980 kernel/sched/core.c:6695
schedule+0x54/0xc0 kernel/sched/core.c:6771
io_schedule+0x3e/0x60 kernel/sched/core.c:9026
bit_wait_io+0xc/0x50 kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0xba/0x1c0 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0x99/0xc0 kernel/sched/wait_bit.c:117
lock_buffer include/linux/buffer_head.h:385 [inline]
hfs_mdb_commit+0x49/0x2e0 fs/hfs/mdb.c:271
process_one_work kernel/workqueue.c:2630 [inline]
process_scheduled_works+0x277/0x510 kernel/workqueue.c:2703
worker_thread+0x23d/0x300 kernel/workqueue.c:2784
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:304
INFO: task syz-executor.0:2120 blocked for more than 143 seconds.
Not tainted 6.6.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:11704 pid:2120 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x6ad/0x980 kernel/sched/core.c:6695
schedule+0x54/0xc0 kernel/sched/core.c:6771
io_schedule+0x3e/0x60 kernel/sched/core.c:9026
bit_wait_io+0xc/0x50 kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0xba/0x1c0 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0x99/0xc0 kernel/sched/wait_bit.c:117
lock_buffer include/linux/buffer_head.h:385 [inline]
hfs_mdb_commit+0x29c/0x2e0 fs/hfs/mdb.c:325
hfs_sync_fs+0x9/0x10 fs/hfs/super.c:35
sync_filesystem+0x32/0x80 fs/sync.c:56
generic_shutdown_super+0x25/0x110 fs/super.c:666
kill_block_super+0x16/0x40 fs/super.c:1646
deactivate_locked_super+0x30/0x110 fs/super.c:481
cleanup_mnt+0xe2/0x120 fs/namespace.c:1254
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+0x2b/0x1d0 kernel/entry/common.c:296
do_syscall_64+0x4d/0x90 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f082807dbc7
RSP: 002b:00007ffeb8b1eea8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f082807dbc7
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffeb8b1ef60
RBP: 00007ffeb8b1ef60 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffeb8b20020
R13: 00007f08280d7aa2 R14: 000000000000a9ad R15: 0000000000000007
Showing all locks held in the system:
2 locks held by kworker/0:1/10:
#0: ffff88810006ab38 ((wq_completion)events_long){....}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#0: ffff88810006ab38 ((wq_completion)events_long){....}-{0:0}, at: process_scheduled_works+0x21d/0x510 kernel/workqueue.c:2703
#1: ffffc9000005be58 ((work_completion)(&(&sbi->mdb_work)->work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#1: ffffc9000005be58 ((work_completion)(&(&sbi->mdb_work)->work)){....}-{0:0}, at: process_scheduled_works+0x21d/0x510 kernel/workqueue.c:2703
1 lock held by khungtaskd/28:
#0: ffffffff831d85c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff831d85c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff831d85c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x30/0x100 kernel/locking/lockdep.c:6613
2 locks held by kworker/u4:5/924:
2 locks held by getty/1501:
#0: ffff888109eed0a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc900033db2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1ac/0x6e0 drivers/tty/n_tty.c:2206
1 lock held by syz-executor.0/2120:
#0: ffff88810ea560e0 (&type->s_umount_key#47){....}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88810ea560e0 (&type->s_umount_key#47){....}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88810ea560e0 (&type->s_umount_key#47){....}-{3:3}, at: deactivate_super+0x2b/0x40 fs/super.c:513
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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:304
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 924 Comm: kworker/u4:5 Not tainted 6.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__default_send_IPI_dest_field+0x3e/0x50 arch/x86/kernel/apic/ipi.c:178
Code: 5f ff 00 10 00 00 74 0f f3 90 f7 04 25 00 c3 5f ff 00 10 00 00 75 f1 c1 e5 18 89 2c 25 10 c3 5f ff 09 de 89 34 25 00 c3 5f ff <5b> 5d c3 e8 4a ff ff ff be 00 04 00 00 eb de 0f 1f 00 f3 0f 1e fa
RSP: 0018:ffffc90001f67c08 EFLAGS: 00000002
RAX: 2e37b015b6b6f900 RBX: 0000000000000800 RCX: ffffffff83087780
RDX: 0000000000000800 RSI: 00000000000008fb RDI: 0000000000000001
RBP: 0000000001000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff81033e20
R13: ffff888237c346a0 R14: 0000000000000000 R15: ffff888237d2e880
FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb7151474c0 CR3: 00000000030a8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
_flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:36 [inline]
flat_send_IPI_mask+0x34/0x80 arch/x86/kernel/apic/apic_flat_64.c:44
arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:103 [inline]
send_call_function_single_ipi kernel/smp.c:117 [inline]
smp_call_function_many_cond+0x543/0xa50 kernel/smp.c:826
on_each_cpu_cond_mask+0x3a/0x60 kernel/smp.c:1012
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2006 [inline]
text_poke_bp_batch+0x21c/0x300 arch/x86/kernel/alternative.c:2278
text_poke_flush arch/x86/kernel/alternative.c:2407 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2414
arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked kernel/jump_label.c:235 [inline]
static_key_disable+0x3f/0x60 kernel/jump_label.c:243
toggle_allocation_gate+0xe2/0x130 mm/kfence/core.c:835
process_one_work kernel/workqueue.c:2630 [inline]
process_scheduled_works+0x277/0x510 kernel/workqueue.c:2703
worker_thread+0x23d/0x300 kernel/workqueue.c:2784
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:304