ci starts bisection 2025-09-27 22:29:47.434349441 +0000 UTC m=+87253.488577281
bisecting fixing commit since 052d534373b7ed33712a63d5e17b2b6cdbce84fd
building syzkaller on 2a7bcc7f9f751f2ec13586584e8e25b8f6817e8c
ensuring issue is reproducible on original commit 052d534373b7ed33712a63d5e17b2b6cdbce84fd
testing commit 052d534373b7ed33712a63d5e17b2b6cdbce84fd gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 5210fa824207dce2d6e89c8abe9cab2a6215b9cfbbdd93629d09e97a9e70fa7a
all runs: crashed: INFO: task hung in hfs_find_init
representative crash: INFO: task hung in hfs_find_init, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed
testing commit 052d534373b7ed33712a63d5e17b2b6cdbce84fd gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 9c1bbe5a735ebf4f616ec9c0ea0291955a8a1bc2ef825696f9b64310bf0206e2
all runs: crashed: INFO: task hung in hfs_find_init
representative crash: INFO: task hung in hfs_find_init, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
kconfig minimization: base=4093 full=7663 leaves diff=2036
split chunks (needed=false): <2036>
split chunk #0 of len 2036 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 052d534373b7ed33712a63d5e17b2b6cdbce84fd gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: e149df341b54ad413017101c286585566232eac43474dd7a4c3be04b802456c9
all runs: crashed: INFO: task hung in hfs_find_init
representative crash: INFO: task hung in hfs_find_init, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit 052d534373b7ed33712a63d5e17b2b6cdbce84fd gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 68c5b010a9b5b93d50e5af2b0d4dd51c3eb826a88ae070ba2eccad5f75891b66
all runs: OK
false negative chance: 0.000
testing without sub-chunk 3/5
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit 052d534373b7ed33712a63d5e17b2b6cdbce84fd gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 32fdf213cb8d6d1d37802e50d6d4ca04bb351aac0f8018960b5733c759fd5233
all runs: crashed: INFO: task hung in hfs_find_init
representative crash: INFO: task hung in hfs_find_init, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed
testing commit 052d534373b7ed33712a63d5e17b2b6cdbce84fd gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 57890024102e9d98df4820ee870e1492a47c59df799baf6df06a1a40126a8f7a
all runs: crashed: INFO: task hung in hfs_find_init
representative crash: INFO: task hung in hfs_find_init, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed
testing commit 052d534373b7ed33712a63d5e17b2b6cdbce84fd gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 6f209e6a4e9e51ab98210793eb6e304a28a48bec89532dd0c31139c11f82809a
all runs: crashed: INFO: task hung in hfs_find_init
representative crash: INFO: task hung in hfs_find_init, types: [HANG]
the chunk can be dropped
minimized to 408 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI BLK_DEV_ZONED CMA COMMON_CLK DAX DLM DM_PERSISTENT_DATA DM_RAID DM_SNAPSHOT DM_THIN_PROVISIONING DM_UEVENT DM_VERITY DM_VERITY_FEC DM_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_BOCHS DRM_BRIDGE DRM_BUDDY 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_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 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_CORE FB_DEFERRED_IO FB_IOMEM_FOPS FB_IOMEM_HELPERS FB_NOTIFY FB_SYSMEM_FOPS FB_SYSMEM_HELPERS FB_SYSMEM_HELPERS_DEFERRED FB_SYS_COPYAREA FB_SYS_FILLRECT 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_STACK 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 GCC11_NO_ARRAY_BOUNDS GENERIC_PHY GENERIC_PTDUMP 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 HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_EISA HAVE_FAST_GUP 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_DRAGONRISE 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 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_COMPAT 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_SPAN_ITER IOMMUFD IOMMUFD_DRIVER 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_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_PROTO_TCP IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE MAC802154 MCORE2 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 [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing current HEAD 51a24b7deaae5c3561965f5b4b27bb9d686add1c
testing commit 51a24b7deaae5c3561965f5b4b27bb9d686add1c gcc
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 08eb1835b4d799b50b2541dff8c91799bf340da82db922c00d3391ee8b4ebb74
all runs: crashed: INFO: task hung in hfs_find_init
representative crash: INFO: task hung in hfs_find_init, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h43m19.573694424s (build: 45m41.621050961s, test: 50m41.577014208s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'trace-tools-v6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
crash: INFO: task hung in hfs_find_init
INFO: task syz-executor.0:2549 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:13344 pid:2549 tgid:2548 ppid:2132 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x5a2/0xd10 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x25/0x110 kernel/sched/core.c:7058
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x670/0xd10 kernel/locking/mutex.c:760
hfs_find_init+0x8c/0xc0 fs/hfs/bfind.c:36
hfs_ext_read_extent+0x5c/0x1a0 fs/hfs/extent.c:200
hfs_extend_file+0x17f/0x280 fs/hfs/extent.c:401
hfs_bmap_reserve+0x74/0x90 fs/hfs/btree.c:269
__hfs_ext_write_extent+0x8d/0xb0 fs/hfs/extent.c:121
__hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
hfs_ext_read_extent+0x160/0x1a0 fs/hfs/extent.c:202
hfs_extend_file+0x17f/0x280 fs/hfs/extent.c:401
hfs_get_block+0x65/0x1d0 fs/hfs/extent.c:353
__block_write_begin_int+0x173/0x520 fs/buffer.c:2145
block_write_begin+0x4d/0xb0 fs/buffer.c:2256
hfs_write_begin+0x28/0x70 fs/hfs/inode.c:52
generic_perform_write+0x158/0x2f0 mm/filemap.c:4175
generic_file_write_iter+0x5d/0xe0 mm/filemap.c:4318
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x2aa/0x4b0 fs/read_write.c:686
ksys_write+0x6e/0xf0 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x6d/0x2f0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd40b87cda9
RSP: 002b:00007fd40c6b50c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd40b9abf80 RCX: 00007fd40b87cda9
RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00007fd40b8c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007fd40b9abf80 R15: 00007ffe08fbfa58
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff837e5c60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff837e5c60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff837e5c60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x36/0x120 kernel/locking/lockdep.c:6775
4 locks held by kworker/u8:4/128:
#0: ffff888101ebc548 ((wq_completion)writeback){....}-{0:0}, at: process_one_work+0x42d/0x660 kernel/workqueue.c:3211
#1: ffffc900001e3e38 ((work_completion)(&(&wb->dwork)->work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3212
#2: ffff88810a2ff0e0 (&type->s_umount_key#62){....}-{3:3}, at: super_trylock_shared+0x15/0x50 fs/super.c:563
#3: ffff88810a2fe0b0 (&tree->tree_lock/1){....}-{3:3}, at: hfs_find_init+0x8c/0xc0 fs/hfs/bfind.c:36
2 locks held by getty/1586:
#0: ffff888100abc8a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x60 drivers/tty/tty_ldisc.c:243
#1: ffffc9000304b2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x17a/0x660 drivers/tty/n_tty.c:2222
7 locks held by syz-executor.0/2549:
#0: ffff888106735178 (&f->f_pos_lock){....}-{3:3}, at: fdget_pos+0x89/0x180 fs/file.c:1232
#1: ffff88810a2ff418 (sb_writers#13){....}-{0:0}, at: ksys_write+0x6e/0xf0 fs/read_write.c:738
#2: ffff88810db514a0 (&sb->s_type->i_mutex_key#19){....}-{3:3}, at: inode_lock include/linux/fs.h:870 [inline]
#2: ffff88810db514a0 (&sb->s_type->i_mutex_key#19){....}-{3:3}, at: generic_file_write_iter+0x29/0xe0 mm/filemap.c:4315
#3: ffff88810db512f8 (&HFS_I(inode)->extents_lock){....}-{3:3}, at: hfs_extend_file+0x3f/0x280 fs/hfs/extent.c:397
#4: ffff88810a2fe0b0 (&tree->tree_lock/1){....}-{3:3}, at: hfs_find_init+0x8c/0xc0 fs/hfs/bfind.c:36
#5: ffff88810db500f8 (&HFS_I(tree->inode)->extents_lock){....}-{3:3}, at: hfs_extend_file+0x3f/0x280 fs/hfs/extent.c:397
#6: ffff88810a2fe0b0 (&tree->tree_lock/1){....}-{3:3}, at: hfs_find_init+0x8c/0xc0 fs/hfs/bfind.c:36
4 locks held by syz-executor.0/7789:
=============================================
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 08/18/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x5a/0x90 lib/dump_stack.c:120
nmi_cpu_backtrace+0xd4/0x110 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0xd5/0x140 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
watchdog+0x5f3/0x630 kernel/hung_task.c:491
kthread+0x107/0x200 kernel/kthread.c:463
ret_from_fork+0x192/0x1b0 arch/x86/kernel/process.c:148
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: 7791 Comm: syz-executor.0 Not tainted syzkaller #0 PREEMPT(none)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5599 [inline]
RIP: 0010:lock_is_held_type+0x9f/0x140 kernel/locking/lockdep.c:5940
Code: 01 41 8b 84 24 40 0a 00 00 85 c0 7f 17 e9 92 00 00 00 41 83 c7 01 45 3b bc 24 40 0a 00 00 0f 8d 80 00 00 00 49 63 c7 48 89 ee <48> 8d 04 80 49 8d 5c c5 00 48 89 df e8 b0 fe ff ff 85 c0 74 d3 41
RSP: 0018:ffffc900025ffb68 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff88817c794490 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff888165a0df78 RDI: ffffffff8329dc55
RBP: ffff888165a0df78 R08: 000000000000001a R09: 0000000000000000
R10: 0000000000000001 R11: fefefefefefefeff R12: ffff888102b28000
R13: ffff888102b28a48 R14: 00000000ffffffff R15: 0000000000000000
FS: 00007f945240b6c0(0000) GS:ffff8882b3739000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020c00000 CR3: 0000000179193000 CR4: 00000000003506f0
Call Trace:
lock_is_held include/linux/lockdep.h:249 [inline]
workingset_update_node+0x81/0xb0 mm/workingset.c:625
xas_update lib/xarray.c:357 [inline]
update_node lib/xarray.c:765 [inline]
xas_store+0x2e8/0x630 lib/xarray.c:852
__filemap_add_folio+0x29f/0x550 mm/filemap.c:924
filemap_add_folio+0x8e/0xf0 mm/filemap.c:969
__filemap_get_folio+0x1ea/0x420 mm/filemap.c:1991
write_begin_get_folio include/linux/pagemap.h:776 [inline]
ext4_da_write_begin+0x159/0x380 fs/ext4/inode.c:3145
generic_perform_write+0x158/0x2f0 mm/filemap.c:4175
ext4_buffered_write_iter+0x63/0x110 fs/ext4/file.c:299
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x2aa/0x4b0 fs/read_write.c:686
ksys_write+0x6e/0xf0 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x6d/0x2f0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f945167cda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f945240b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f94517abf80 RCX: 00007f945167cda9
RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007f94516c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000010 R14: 00007f94517abf80 R15: 00007fffa5eb8d78