ci starts bisection 2025-04-18 17:41:11.121062582 +0000 UTC m=+73839.714141289
bisecting fixing commit since e01d50cbd6eece456843717a566a34e8b926cf0c
building syzkaller on 97de9cfcb0b25b95878e2eaaf3652a2faa8dd8f4
ensuring issue is reproducible on original commit e01d50cbd6eece456843717a566a34e8b926cf0c
testing commit e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: d4e2a03e2b96a4226627860498a95c3fdfc84e7ac24a326b3114fdf47ae83da8
run #0: infra problem: &{Code:ZONE_RESOURCE_POOL_EXHAUSTED_WITH_DETAILS ErrorDetails:[0xc007636190 0xc007636280 0xc007636320] Location: Message:The zone 'projects/syzkaller/zones/us-central1-c' does not have enough resources available to fulfill the request. '(resource type:compute)'. ForceSendFields:[] NullFields:[]}
run #1: crashed: INFO: task hung in lookup_slow
run #2: crashed: INFO: task hung in lookup_slow
run #3: crashed: INFO: task hung in lookup_slow
run #4: crashed: INFO: task hung in lookup_slow
run #5: crashed: INFO: task hung in lookup_slow
run #6: crashed: INFO: task hung in lookup_slow
run #7: crashed: INFO: task hung in lookup_slow
run #8: crashed: INFO: task hung in lookup_slow
run #9: crashed: INFO: task hung in lookup_slow
run #10: crashed: INFO: task hung in lookup_slow
run #11: crashed: INFO: task hung in lookup_slow
run #12: crashed: INFO: task hung in lookup_slow
run #13: crashed: INFO: task hung in lookup_slow
run #14: crashed: INFO: task hung in lookup_slow
run #15: crashed: INFO: task hung in lookup_slow
run #16: crashed: INFO: task hung in lookup_slow
run #17: crashed: INFO: task hung in lookup_slow
run #18: crashed: INFO: task hung in lookup_slow
run #19: crashed: INFO: task hung in lookup_slow
representative crash: INFO: task hung in lookup_slow, 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 e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: 5ffb058f433a1d6471fe5ca1b57c1bf706275504d796b228bb47e39a623530ab
run #0: crashed: INFO: task hung in fuse_simple_request
run #1: crashed: INFO: task hung in fuse_reverse_inval_entry
run #2: crashed: INFO: task hung in lookup_slow
run #3: crashed: INFO: task hung in fuse_simple_request
run #4: crashed: INFO: task hung in lookup_slow
run #5: crashed: INFO: task hung in fuse_simple_request
run #6: crashed: INFO: task hung in fuse_reverse_inval_entry
run #7: crashed: INFO: task hung in fuse_simple_request
run #8: crashed: INFO: task hung in fuse_simple_request
run #9: crashed: INFO: task hung in fuse_reverse_inval_entry
representative crash: INFO: task hung in fuse_simple_request, 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=4076 full=7378 leaves diff=2018
split chunks (needed=false): <2018>
split chunk #0 of len 2018 into 5 parts
testing without sub-chunk 1/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: fc949a2a8a3c9e25906966b35ffa6bd113ad12cedac207069597907be2540f25
run #0: crashed: INFO: task hung in fuse_simple_request
run #1: crashed: INFO: task hung in fuse_simple_request
run #2: crashed: INFO: task hung in fuse_reverse_inval_entry
run #3: crashed: INFO: task hung in fuse_simple_request
run #4: crashed: INFO: task hung in fuse_simple_request
run #5: crashed: INFO: task hung in fuse_reverse_inval_entry
run #6: crashed: INFO: task hung in fuse_reverse_inval_entry
run #7: crashed: INFO: task hung in fuse_reverse_inval_entry
run #8: crashed: INFO: task hung in fuse_simple_request
run #9: crashed: INFO: task hung in fuse_reverse_inval_entry
representative crash: INFO: task hung in fuse_simple_request, 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 e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: ab3dd64ebd5ed659725cd61efb46e54b18ce58058a6490f071a3143b8a4570fa
all runs: OK
false negative chance: 0.000
testing without sub-chunk 3/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: 92261a856ecb55ddd25059f32276df2144d99ebf440a4f0ed17180c2b0bc7b7c
all runs: crashed: INFO: task hung in fuse_simple_request
representative crash: INFO: task hung in fuse_simple_request, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: cde6a5463f869bb4d147371cf4b8fd0420dc95eee2c9d41c8989ae2ae9a517ce
all runs: crashed: INFO: task hung in fuse_simple_request
representative crash: INFO: task hung in fuse_simple_request, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: ced5668195a5ab8bb78bed3c2bb221daab8d6c45a78ba1016f8e9e83699d4e8e
all runs: crashed: INFO: task hung in fuse_simple_request
representative crash: INFO: task hung in fuse_simple_request, types: [HANG]
the chunk can be dropped
minimized to 404 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_FBDEV_EMULATION DRM_KMS_HELPER DRM_NOMODESET DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_USE_DYNAMIC_DEBUG DRM_VGEM DRM_VIRTIO_GPU DRM_VKMS DRM_VMWGFX DRM_VMWGFX_FBCON 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_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 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 GVE HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_EISA HAVE_FAST_GUP 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 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 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 INTEL_SOC_PMIC_CHTWC 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 IP_VS_SED IP_VS_SH IP_VS_TWOS IP_VS_WLC IP_VS_WRR IRQ_BYPASS_MANAGER IRQ_MSI_IOMMU IRQ_POLL IRQ_TIME_ACCOUNTING IR_IGORPLUGUSB 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 RC_DEVICES 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 7e74f756f5f643148ca5537bf2fee6767e4b0ed9
testing commit 7e74f756f5f643148ca5537bf2fee6767e4b0ed9 gcc
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6
kernel signature: e9e6ebd4c1fe2fba8c501a8660ad747b809b5b96b90adf6b0ea1a6290948d761
all runs: crashed: INFO: task hung in lookup_slow
representative crash: INFO: task hung in lookup_slow, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 3h43m44.819131349s (build: 2h34m29.655818741s, test: 53m40.066434249s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'v6.15-rc2-ksmbd-server-fixes' of git://git.samba.org/ksmbd
crash: INFO: task hung in lookup_slow
INFO: task syz-executor.0:2040 blocked for more than 143 seconds.
Not tainted 6.15.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:11376 pid:2040 tgid:2040 ppid:1 task_flags:0x400140 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x7a1/0xcb0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6860
schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:6917
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x2f1/0x470 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:877 [inline]
lookup_slow+0x20/0x50 fs/namei.c:1823
walk_component fs/namei.c:2128 [inline]
link_path_walk+0x352/0x3e0 fs/namei.c:2493
path_openat+0xc1/0xe00 fs/namei.c:4000
do_filp_open+0xc8/0x190 fs/namei.c:4031
do_sys_openat2+0x84/0xe0 fs/open.c:1429
do_sys_open fs/open.c:1444 [inline]
__do_sys_openat fs/open.c:1460 [inline]
__se_sys_openat fs/open.c:1455 [inline]
__x64_sys_openat+0x7f/0xa0 fs/open.c:1455
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8d/0x170 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feabf27b841
RSP: 002b:00007fffcedb37a0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007feabf27b841
RDX: 0000000000090800 RSI: 00007feabf2d7b46 RDI: 00000000ffffff9c
RBP: 00007fffcedb386c R08: 000000001e07e007 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 000000000000c88b R14: 000000000000c547 R15: 0000000000000009
INFO: task syz-executor.0:2456 blocked for more than 143 seconds.
Not tainted 6.15.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:12984 pid:2456 tgid:2455 ppid:2040 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x7a1/0xcb0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6860
request_wait_answer fs/fuse/dev.c:564 [inline]
__fuse_request_send fs/fuse/dev.c:578 [inline]
__fuse_simple_request+0x487/0x510 fs/fuse/dev.c:672
fuse_simple_request fs/fuse/fuse_i.h:1237 [inline]
fuse_lookup_name+0x236/0x3d0 fs/fuse/dir.c:386
fuse_lookup+0x101/0x220 fs/fuse/dir.c:429
__lookup_slow+0x12b/0x1a0 fs/namei.c:1807
lookup_slow+0x2e/0x50 fs/namei.c:1824
walk_component fs/namei.c:2128 [inline]
link_path_walk+0x352/0x3e0 fs/namei.c:2493
path_openat+0xc1/0xe00 fs/namei.c:4000
do_filp_open+0xc8/0x190 fs/namei.c:4031
do_sys_openat2+0x84/0xe0 fs/open.c:1429
do_sys_open fs/open.c:1444 [inline]
__do_sys_openat fs/open.c:1460 [inline]
__se_sys_openat fs/open.c:1455 [inline]
__x64_sys_openat+0x7f/0xa0 fs/open.c:1455
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8d/0x170 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feabf27aa90
RSP: 002b:00007feabffd7c00 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007feabf27aa90
RDX: 0000000000004000 RSI: 00007feabffd7ca0 RDI: 00000000ffffff9c
RBP: 00007feabffd7ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000006 R14: 00007feabf39bf80 R15: 00007fffcedb34f8
INFO: task syz-executor.0:2457 blocked for more than 143 seconds.
Not tainted 6.15.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:14400 pid:2457 tgid:2455 ppid:2040 task_flags:0x400040 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x7a1/0xcb0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6860
schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:6917
rwsem_down_write_slowpath+0x3db/0x6f0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write_nested+0x64/0x90 kernel/locking/rwsem.c:1694
inode_lock_nested include/linux/fs.h:902 [inline]
fuse_reverse_inval_entry+0x46/0x260 fs/fuse/dir.c:1399
fuse_notify fs/fuse/dev.c:-1 [inline]
fuse_dev_do_write+0xdd5/0x1050 fs/fuse/dev.c:2132
fuse_dev_write+0x92/0xc0 fs/fuse/dev.c:2216
new_sync_write fs/read_write.c:591 [inline]
vfs_write+0x2f1/0x430 fs/read_write.c:684
ksys_write+0x75/0xe0 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8d/0x170 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feabf27bdb9
RSP: 002b:00007feabffb70c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007feabf39c050 RCX: 00007feabf27bdb9
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007feabf2d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007feabf39c050 R15: 00007fffcedb34f8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff833dee28 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff833dee28 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff833dee28 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x30/0x100 kernel/locking/lockdep.c:6764
2 locks held by getty/1508:
#0: ffff8881023080a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc90002ccf2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1d3/0x710 drivers/tty/n_tty.c:2222
1 lock held by syz-executor.0/2040:
#0: ffff88817da70148 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:877 [inline]
#0: ffff88817da70148 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow+0x20/0x50 fs/namei.c:1823
2 locks held by syz-executor.0/2456:
#0: ffff88817da70148 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:877 [inline]
#0: ffff88817da70148 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow+0x20/0x50 fs/namei.c:1823
#1: ffff88817da70608 (&fi->mutex){....}-{3:3}, at: fuse_lock_inode+0x2d/0x40 fs/fuse/inode.c:590
2 locks held by syz-executor.0/2457:
#0: ffff8881093e8b50 (&fc->killsb){....}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1729 [inline]
#0: ffff8881093e8b50 (&fc->killsb){....}-{3:3}, at: fuse_notify fs/fuse/dev.c:2047 [inline]
#0: ffff8881093e8b50 (&fc->killsb){....}-{3:3}, at: fuse_dev_do_write+0x9dd/0x1050 fs/fuse/dev.c:2132
#1: ffff88817da70148 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:902 [inline]
#1: ffff88817da70148 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: fuse_reverse_inval_entry+0x46/0x260 fs/fuse/dir.c:1399
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x42/0xe0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x147/0x160 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x602/0x630 kernel/hung_task.c:437
kthread+0x1fd/0x230 kernel/kthread.c:464
ret_from_fork+0x34/0x40 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.15.0-rc2-syzkaller #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:81
Code: 7e 23 a1 fe cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d f1 aa 11 00 f3 0f 1e fa fb f4 53 23 a1 fe cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff83203e90 EFLAGS: 00000286
RAX: 40e289cf40bb5500 RBX: 0000000000000000 RCX: 7fffffffffffffff
RDX: ffffffff83203e67 RSI: ffffffff82ecf760 RDI: ffffffff82ed3811
RBP: ffffffff83289740 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff84056020
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8882b3bbe000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f424160e662 CR3: 000000010fbf4000 CR4: 0000000000350ef0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:748
default_idle_call+0x3d/0x60 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0xd8/0x240 kernel/sched/idle.c:325
cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:423
rest_init+0x10c/0x110 init/main.c:743
start_kernel+0x2e9/0x300 init/main.c:1099
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:513
x86_64_start_kernel+0x61/0x70 arch/x86/kernel/head64.c:494
common_startup_64+0x13e/0x147