ci starts bisection 2024-01-19 20:20:16.755829587 +0000 UTC m=+37719.052342797
bisecting fixing commit since a4412fdd49dc011bcc2c0d81ac4cab7457092650
building syzkaller on e080de16713b9dbf308cdd7bcb85b58293e46e33
ensuring issue is reproducible on original commit a4412fdd49dc011bcc2c0d81ac4cab7457092650
testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d986ec64c235730823a992e8b775cdf1d4617525e9209a5553a91a69e51bc0bd
all runs: crashed: INFO: task hung in walk_component
representative crash: INFO: task hung in walk_component, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d1eeb641313f55e4295fbcc76752b473db4d73d626d681a5ae726f2d58bc23bf
all runs: crashed: INFO: task hung in walk_component
representative crash: INFO: task hung in walk_component, 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=3917 full=7502 leaves diff=2004
split chunks (needed=false): <2004>
split chunk #0 of len 2004 into 5 parts
testing without sub-chunk 1/5
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 6c134dc143026b94aaefd85aff7aadcec2348104de74dcc26517306600a6c2d0
all runs: crashed: INFO: task hung in walk_component
representative crash: INFO: task hung in walk_component, 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 a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b8ffa518dd92a24294e38ce3b6ce68f57db0c84ffa0d8fe065507afbaf753427
all runs: OK
false negative chance: 0.000
testing without sub-chunk 3/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 48963924daf6082a2d501d28b0815eee495344b61445124684000bd5db157b51
run #0: crashed: INFO: task hung in corrupted
run #1: crashed: INFO: task hung in corrupted
run #2: crashed: INFO: task hung in walk_component
run #3: crashed: INFO: task hung in walk_component
run #4: crashed: INFO: task hung in walk_component
run #5: crashed: INFO: task hung in walk_component
run #6: crashed: INFO: task hung in walk_component
run #7: crashed: INFO: task hung in walk_component
run #8: crashed: INFO: task hung in walk_component
run #9: crashed: INFO: task hung in walk_component
representative crash: INFO: task hung in corrupted, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: f197907a353842678f391b9ccd923d5e0d8518af6cbeac450dd6f564d467280e
all runs: crashed: INFO: task hung in walk_component
representative crash: INFO: task hung in walk_component, 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 a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d0a2c45a10b2c28f2c467db64c4d0e5a82cdcd6845ed4983153c17e263809fdf
all runs: crashed: INFO: task hung in walk_component
representative crash: INFO: task hung in walk_component, 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_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_NOMODESET 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 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_MSI_IRQ_DOMAIN 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_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 IOASID 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_AH IP_VS_PROTO_AH_ESP IP_VS_PROTO_ESP IP_VS_PROTO_SCTP IP_VS_PROTO_TCP IP_VS_PROTO_UDP IP_VS_RR 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing current HEAD 556e2d17cae620d549c5474b1ece053430cd50bc
testing commit 556e2d17cae620d549c5474b1ece053430cd50bc gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 2cf9b00c0b25de588fc93e0b2f6566a022530c75264cef9ed90e199d6dc502a5
all runs: crashed: INFO: task hung in walk_component
representative crash: INFO: task hung in walk_component, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 6h38m28.111046559s (build: 5h36m48.190944648s, test: 53m47.308675486s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'ceph-for-6.8-rc1' of https://github.com/ceph/ceph-client
crash: INFO: task hung in walk_component
INFO: task syz-executor.0:2111 blocked for more than 143 seconds.
Not tainted 6.7.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:12136 pid:2111 tgid:2111 ppid:1 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x3ba/0xa00 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x30/0xf0 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
rwsem_down_read_slowpath+0x2df/0x580 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x66/0xf0 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:812 [inline]
lookup_slow fs/namei.c:1709 [inline]
walk_component+0xe5/0x170 fs/namei.c:2001
link_path_walk.part.0.constprop.0+0x23d/0x370 fs/namei.c:2328
link_path_walk fs/namei.c:2253 [inline]
path_openat+0xac/0xc30 fs/namei.c:3794
do_filp_open+0xae/0x150 fs/namei.c:3825
do_sys_openat2+0xa2/0xd0 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_openat fs/open.c:1435 [inline]
__se_sys_openat fs/open.c:1430 [inline]
__x64_sys_openat+0x69/0x90 fs/open.c:1430
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x71/0x170 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f378947c311
RSP: 002b:00007ffeefbaa490 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f378947c311
RDX: 0000000000090800 RSI: 00007f37894d7b46 RDI: 00000000ffffff9c
RBP: 00007ffeefbaa55c R08: 000000000000002d R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 000000000000a800 R14: 000000000000a4bc R15: 0000000000000009
INFO: task syz-executor.0:2530 blocked for more than 143 seconds.
Not tainted 6.7.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:13432 pid:2530 tgid:2529 ppid:2111 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x3ba/0xa00 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x30/0xf0 kernel/sched/core.c:6817
request_wait_answer+0x1b2/0x2a0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1be/0x2a0 fs/fuse/dev.c:513
fuse_lookup_name+0xa4/0x1a0 fs/fuse/dir.c:386
fuse_lookup+0x80/0x1a0 fs/fuse/dir.c:425
__lookup_slow+0xf4/0x1a0 fs/namei.c:1693
lookup_slow fs/namei.c:1710 [inline]
walk_component+0xf4/0x170 fs/namei.c:2001
link_path_walk.part.0.constprop.0+0x23d/0x370 fs/namei.c:2328
link_path_walk fs/namei.c:2253 [inline]
path_openat+0xac/0xc30 fs/namei.c:3794
do_filp_open+0xae/0x150 fs/namei.c:3825
do_sys_openat2+0xa2/0xd0 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_openat fs/open.c:1435 [inline]
__se_sys_openat fs/open.c:1430 [inline]
__x64_sys_openat+0x69/0x90 fs/open.c:1430
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x71/0x170 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f378947c859
RSP: 002b:00007f378a2340c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f378959bf80 RCX: 00007f378947c859
RDX: 0000000000000042 RSI: 0000000020002080 RDI: ffffffffffffff9c
RBP: 00007f37894d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007f378959bf80 R15: 00007ffeefbaa1e8
INFO: task syz-executor.0:2531 blocked for more than 143 seconds.
Not tainted 6.7.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:14536 pid:2531 tgid:2529 ppid:2111 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x3ba/0xa00 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x30/0xf0 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0x2d2/0x730 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write_nested+0x7c/0x90 kernel/locking/rwsem.c:1696
inode_lock_nested include/linux/fs.h:837 [inline]
fuse_reverse_inval_entry+0x44/0x210 fs/fuse/dir.c:1351
fuse_notify_delete fs/fuse/dev.c:1552 [inline]
fuse_notify fs/fuse/dev.c:1801 [inline]
fuse_dev_do_write+0x5d5/0xfe0 fs/fuse/dev.c:1876
fuse_dev_write+0x64/0x90 fs/fuse/dev.c:1960
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0x2b0/0x4b0 fs/read_write.c:590
ksys_write+0x70/0xf0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x71/0x170 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f378947c859
RSP: 002b:00007f378a2130c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f378959c050 RCX: 00007f378947c859
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f37894d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f378959c050 R15: 00007ffeefbaa1e8
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff82fddd80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff82fddd80 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff82fddd80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x36/0x120 kernel/locking/lockdep.c:6614
3 locks held by kworker/u4:4/111:
2 locks held by getty/1493:
#0: ffff888102bbd8a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x50 drivers/tty/tty_ldisc.c:243
#1: ffffc900035472f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x54b/0x6a0 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.0/2111:
#0: ffff88817ae18150 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88817ae18150 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1709 [inline]
#0: ffff88817ae18150 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0xe5/0x170 fs/namei.c:2001
2 locks held by syz-executor.0/2530:
#0: ffff88817ae18150 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88817ae18150 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow fs/namei.c:1709 [inline]
#0: ffff88817ae18150 (&type->i_mutex_dir_key#8){....}-{3:3}, at: walk_component+0xe5/0x170 fs/namei.c:2001
#1: ffff88817ae185c0 (&fi->mutex){....}-{3:3}, at: fuse_lock_inode+0x2c/0x40 fs/fuse/inode.c:544
2 locks held by syz-executor.0/2531:
#0: ffff888104790b38 (&fc->killsb){....}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1551 [inline]
#0: ffff888104790b38 (&fc->killsb){....}-{3:3}, at: fuse_notify fs/fuse/dev.c:1801 [inline]
#0: ffff888104790b38 (&fc->killsb){....}-{3:3}, at: fuse_dev_do_write+0x5bb/0xfe0 fs/fuse/dev.c:1876
#1: ffff88817ae18150 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff88817ae18150 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: fuse_reverse_inval_entry+0x44/0x210 fs/fuse/dir.c:1351
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.7.0-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+0x3d/0x60 lib/dump_stack.c:106
nmi_cpu_backtrace+0xcc/0x110 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0xd1/0x130 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+0x615/0x640 kernel/hung_task.c:379
kthread+0xde/0x110 kernel/kthread.c:388
ret_from_fork+0x2c/0x40 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 111 Comm: kworker/u4:4 Not tainted 6.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__default_send_IPI_dest_field+0x3a/0x80 arch/x86/kernel/apic/ipi.c:186
Code: 53 89 d3 75 04 eb 28 f3 90 8b 04 25 00 c3 5f ff f6 c4 10 75 f2 44 89 e0 89 04 25 10 c3 5f ff 89 f0 09 d8 89 04 25 00 c3 5f ff <5b> 5d 41 5c c3 bd e8 03 00 00 eb 16 65 ff 05 9f 9c fd 7e bf bc 8d
RSP: 0018:ffffc90000f13c78 EFLAGS: 00000002
RAX: 00000000000008fb RBX: 0000000000000800 RCX: 0000000000000002
RDX: 0000000000000800 RSI: 00000000000000fb RDI: 0000000002000000
RBP: 0000000000000001 R08: ffff888237d338c0 R09: 0000000000002a2d
R10: 0000000000000000 R11: 0000000000000006 R12: 0000000002000000
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe218e26180 CR3: 0000000002eac000 CR4: 00000000003506f0
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+0x15/0x30 arch/x86/kernel/apic/apic_flat_64.c:44
arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:101 [inline]
send_call_function_single_ipi kernel/smp.c:117 [inline]
smp_call_function_many_cond+0x5ff/0x670 kernel/smp.c:837
on_each_cpu_cond_mask+0x3b/0x70 kernel/smp.c:1023
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2087 [inline]
text_poke_bp_batch+0x2e8/0x310 arch/x86/kernel/alternative.c:2380
text_poke_flush arch/x86/kernel/alternative.c:2488 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2495
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_cpuslocked+0x4a/0x60 kernel/jump_label.c:223
static_key_disable+0x15/0x20 kernel/jump_label.c:243
toggle_allocation_gate mm/kfence/core.c:831 [inline]
toggle_allocation_gate+0x6d/0x120 mm/kfence/core.c:818
process_one_work+0x208/0x4c0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x1c3/0x380 kernel/workqueue.c:2787
kthread+0xde/0x110 kernel/kthread.c:388
ret_from_fork+0x2c/0x40 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242