ci starts bisection 2025-01-17 20:32:08.408962556 +0000 UTC m=+28223.704205202
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, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4d796355249027e99a3b89a64463af89563a0ea9eadbc10d2d7271df6c77c495
all runs: 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, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 5985a99a0bad77a7aab46ae6f3ad53809046478b2eada0c7537b063b21232881
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 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_simple_request
run #6: crashed: INFO: task hung in fuse_simple_request
run #7: crashed: INFO: task hung in lookup_slow
run #8: crashed: INFO: task hung in fuse_simple_request
run #9: crashed: INFO: task hung in fuse_simple_request
representative crash: INFO: task hung in fuse_simple_request, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
kconfig minimization: base=4045 full=7378 leaves diff=1994
split chunks (needed=false): <1994>
split chunk #0 of len 1994 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 e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: c651bde14f7b0dc6c55990bc92adcba42bd49acbd85c85c4906b9ebe6ce7de0d
run #0: crashed: INFO: task hung in fuse_reverse_inval_entry
run #1: crashed: INFO: task hung in fuse_simple_request
run #2: crashed: INFO: task hung in lookup_slow
run #3: crashed: INFO: task hung in fuse_reverse_inval_entry
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 lookup_slow
run #7: crashed: INFO: task hung in fuse_reverse_inval_entry
run #8: crashed: INFO: task hung in fuse_reverse_inval_entry
run #9: crashed: INFO: task hung in lookup_slow
representative crash: INFO: task hung in fuse_reverse_inval_entry, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 5d9a5c62064421ad5594886686722d14da60e32faf8ff4225ba4f86a2c4a6900
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 e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: c88028dc23fd49cb01044bab96cfdbbf724292061bcdbefb78fd98d356361844
run #0: crashed: INFO: task hung in lookup_slow
run #1: crashed: INFO: task hung in fuse_simple_request
run #2: crashed: INFO: task hung in fuse_simple_request
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 lookup_slow
run #6: crashed: INFO: task hung in fuse_simple_request
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_simple_request
representative crash: INFO: task hung in lookup_slow, 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, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d11a8e40343d614e60a44d8f2011e2ca6ff921defcf520d3e5a715f409794435
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 [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 95013e62ab8edacc5f666055f2277c5e91178ebd4f55c0bba5c8141618ad53f7
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 399 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CMA COMMON_CLK DAX DLM DRM DRM_FBDEV_EMULATION DRM_KMS_HELPER 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 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_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_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE 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_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 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_POLL IRQ_TIME_ACCOUNTING IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_MCEUSB IR_REDRAT3 IR_STREAMZAP 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 [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing current HEAD ad26fc09dabfa6a33ad5baee80479f518370b316
testing commit ad26fc09dabfa6a33ad5baee80479f518370b316 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 26e9c5b89a5f4eca144196c5c67c3500a61594120d3ba897497419febdffb8c7
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: 2h13m15.838174501s (build: 1h12m42.170624237s, test: 50m51.626372733s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'mm-hotfixes-stable-2025-01-16-21-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
crash: INFO: task hung in lookup_slow
INFO: task syz-executor.0:2047 blocked for more than 143 seconds.
Not tainted 6.13.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:12024 pid:2047 tgid:2047 ppid:1 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x6b2/0xa40 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6848
schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:6905
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+0x2e5/0x440 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:828 [inline]
lookup_slow+0x20/0x50 fs/namei.c:1807
walk_component fs/namei.c:2112 [inline]
link_path_walk+0x34b/0x3e0 fs/namei.c:2477
path_openat+0xbe/0xdf0 fs/namei.c:3983
do_filp_open+0xc5/0x180 fs/namei.c:4014
do_sys_openat2+0x7e/0xe0 fs/open.c:1402
do_sys_open fs/open.c:1417 [inline]
__do_sys_openat fs/open.c:1433 [inline]
__se_sys_openat fs/open.c:1428 [inline]
__x64_sys_openat+0x7c/0xa0 fs/open.c:1428
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x8d/0x170 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa5fbc7b841
RSP: 002b:00007ffe1b157b30 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fa5fbc7b841
RDX: 0000000000090800 RSI: 00007fa5fbcd7b46 RDI: 00000000ffffff9c
RBP: 00007ffe1b157bfc R08: 0000000035843d62 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 000000000000c244 R14: 000000000000bf01 R15: 0000000000000009
INFO: task syz-executor.0:2463 blocked for more than 143 seconds.
Not tainted 6.13.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:13080 pid:2463 tgid:2462 ppid:2047 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x6b2/0xa40 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6848
request_wait_answer fs/fuse/dev.c:464 [inline]
__fuse_request_send fs/fuse/dev.c:478 [inline]
__fuse_simple_request+0x44e/0x540 fs/fuse/dev.c:572
fuse_simple_request fs/fuse/fuse_i.h:1172 [inline]
fuse_lookup_name+0x1f5/0x390 fs/fuse/dir.c:387
fuse_lookup+0xfc/0x220 fs/fuse/dir.c:430
__lookup_slow+0x13a/0x1b0 fs/namei.c:1791
lookup_slow+0x2e/0x50 fs/namei.c:1808
walk_component fs/namei.c:2112 [inline]
link_path_walk+0x34b/0x3e0 fs/namei.c:2477
path_openat+0xbe/0xdf0 fs/namei.c:3983
do_filp_open+0xc5/0x180 fs/namei.c:4014
do_sys_openat2+0x7e/0xe0 fs/open.c:1402
do_sys_open fs/open.c:1417 [inline]
__do_sys_openat fs/open.c:1433 [inline]
__se_sys_openat fs/open.c:1428 [inline]
__x64_sys_openat+0x7c/0xa0 fs/open.c:1428
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x8d/0x170 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa5fbc7aa90
RSP: 002b:00007fa5fc8fbc00 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007fa5fbc7aa90
RDX: 0000000000004000 RSI: 00007fa5fc8fbca0 RDI: 00000000ffffff9c
RBP: 00007fa5fc8fbca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000006 R14: 00007fa5fbd9bf80 R15: 00007ffe1b157888
INFO: task syz-executor.0:2464 blocked for more than 143 seconds.
Not tainted 6.13.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:14416 pid:2464 tgid:2462 ppid:2047 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x6b2/0xa40 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6848
schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:6905
rwsem_down_write_slowpath+0x2e5/0x6b0 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:853 [inline]
fuse_reverse_inval_entry+0x46/0x260 fs/fuse/dir.c:1373
fuse_dev_do_write+0xf54/0x1020 fs/fuse/dev.c:2003
fuse_dev_write+0x8f/0xc0 fs/fuse/dev.c:2087
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0x3f0/0x4d0 fs/read_write.c:679
ksys_write+0x73/0xe0 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x8d/0x170 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa5fbc7bdb9
RSP: 002b:00007fa5fb7ff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa5fbd9c050 RCX: 00007fa5fbc7bdb9
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fa5fbcd8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa5fbd9c050 R15: 00007ffe1b157888
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff833dd9d8 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff833dd9d8 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff833dd9d8 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x30/0x100 kernel/locking/lockdep.c:6744
1 lock held by kworker/u8:7/1169:
#0: ffff888237c2ff58 (&rq->__lock){....}-{2:2}, at: raw_spin_rq_lock_nested+0x1f/0x70 kernel/sched/core.c:598
2 locks held by getty/1515:
#0: ffff888103f600a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc90002ecb2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1b8/0x6f0 drivers/tty/n_tty.c:2211
1 lock held by syz-executor.0/2047:
#0: ffff888112798148 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:828 [inline]
#0: ffff888112798148 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow+0x20/0x50 fs/namei.c:1807
2 locks held by syz-executor.0/2463:
#0: ffff888112798148 (&type->i_mutex_dir_key#8){....}-{3:3}, at: inode_lock_shared include/linux/fs.h:828 [inline]
#0: ffff888112798148 (&type->i_mutex_dir_key#8){....}-{3:3}, at: lookup_slow+0x20/0x50 fs/namei.c:1807
#1: ffff888112798608 (&fi->mutex){....}-{3:3}, at: fuse_lock_inode+0x2d/0x40 fs/fuse/inode.c:586
2 locks held by syz-executor.0/2464:
#0: ffff888102b10348 (&fc->killsb){....}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1608 [inline]
#0: ffff888102b10348 (&fc->killsb){....}-{3:3}, at: fuse_notify fs/fuse/dev.c:1925 [inline]
#0: ffff888102b10348 (&fc->killsb){....}-{3:3}, at: fuse_dev_do_write+0xf04/0x1020 fs/fuse/dev.c:2003
#1: ffff888112798148 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:853 [inline]
#1: ffff888112798148 (&type->i_mutex_dir_key#8/1){....}-{3:3}, at: fuse_reverse_inval_entry+0x46/0x260 fs/fuse/dir.c:1373
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x3e/0xe0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x146/0x160 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0x5eb/0x610 kernel/hung_task.c:397
kthread+0xec/0x100 kernel/kthread.c:389
ret_from_fork+0x34/0x40 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 1169 Comm: kworker/u8:7 Not tainted 6.13.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:147 [inline]
RIP: 0010:lock_release+0x21f/0x2d0 kernel/locking/lockdep.c:5873
Code: 67 a3 f0 7e 83 f8 01 74 17 48 c7 c7 6d db f2 82 e8 c6 23 38 01 65 c7 05 4b a3 f0 7e 00 00 00 00 48 c7 44 24 18 00 00 00 00 9c <8f> 44 24 18 f7 44 24 18 00 02 00 00 75 2c f7 c3 00 02 00 00 74 01
RSP: 0018:ffffc9000281fc28 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000297 RCX: 000000000000000f
RDX: 0000000000000001 RSI: ffffffff82e4d1d9 RDI: ffffffff82eb3eb1
RBP: ffff88810231dda8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff81049ca0 R12: 0000000000000007
R13: ffff88810231d280 R14: 000000000000001e R15: ffff888100070058
FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fca9753df18 CR3: 00000000032ac000 CR4: 0000000000350ef0
Call Trace:
__raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
_raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
__text_poke+0x37c/0x440 arch/x86/kernel/alternative.c:1989
text_poke arch/x86/kernel/alternative.c:2013 [inline]
text_poke_bp_batch+0x25f/0x310 arch/x86/kernel/alternative.c:2402
text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2522
arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked kernel/jump_label.c:240 [inline]
static_key_disable+0x40/0x60 kernel/jump_label.c:248
toggle_allocation_gate+0xe6/0x130 mm/kfence/core.c:854
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0x2d8/0x610 kernel/workqueue.c:3317
worker_thread+0x23e/0x2e0 kernel/workqueue.c:3398
kthread+0xec/0x100 kernel/kthread.c:389
ret_from_fork+0x34/0x40 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244