ci2 starts bisection 2025-05-23 19:55:34.066588974 +0000 UTC m=+17381.046899519
bisecting fixing commit since 4a4be1ad3a6efea16c56615f31117590fd881358
building syzkaller on 34889ee3b09e7b4d381828377aa6173bfcc36cc7
ensuring issue is reproducible on original commit 4a4be1ad3a6efea16c56615f31117590fd881358
testing commit 4a4be1ad3a6efea16c56615f31117590fd881358 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 5c0a20d0dde138f74e0e892d1fc7d8a9f38c1b3fd6a8df0c215f892ac32ec890
all runs: crashed: INFO: task hung in vfs_rmdir
representative crash: INFO: task hung in vfs_rmdir, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit 4a4be1ad3a6efea16c56615f31117590fd881358 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 3b9f1b5608f471f2e43471dd27305787d151171ce932ad03501cfb9081e53202
all runs: crashed: INFO: task hung in vfs_rmdir
representative crash: INFO: task hung in vfs_rmdir, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
kconfig minimization: base=4084 full=8037 leaves diff=2037
split chunks (needed=false): <2037>
split chunk #0 of len 2037 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 4a4be1ad3a6efea16c56615f31117590fd881358 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 1b76ff98e3468b561fb6184da80fdae963dbd7d4c60bb6ac18328dfbfdf6d9b1
all runs: crashed: INFO: task hung in vfs_rmdir
representative crash: INFO: task hung in vfs_rmdir, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit 4a4be1ad3a6efea16c56615f31117590fd881358 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 3ba7096f511ded8476a12284caf35742334e1b36c18d79f2324a9a5458dc14e8
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 4a4be1ad3a6efea16c56615f31117590fd881358 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: e6ff1d1af9c2f13c4f03e60922f9552bffc9d99c3b4d9f817579526b3bc676c9
all runs: crashed: INFO: task hung in vfs_rmdir
representative crash: INFO: task hung in vfs_rmdir, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit 4a4be1ad3a6efea16c56615f31117590fd881358 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: b0c3b4e461acd155fd70f56115b5afaf27131b595d62617db5ccd01cf4e59ed7
all runs: crashed: INFO: task hung in vfs_rmdir
representative crash: INFO: task hung in vfs_rmdir, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit 4a4be1ad3a6efea16c56615f31117590fd881358 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 4b9c618a09834dc60ebecda144ffc3cf54fcb3c97d615fa4acd6a937cf463d54
run #0: crashed: INFO: task hung in vfs_rmdir
run #1: crashed: INFO: task hung in vfs_rmdir
run #2: crashed: INFO: task hung in vfs_rmdir
run #3: crashed: INFO: task hung in vfs_rmdir
run #4: crashed: INFO: task hung in vfs_rmdir
run #5: crashed: INFO: task hung in vfs_rmdir
run #6: crashed: INFO: task hung in vfs_rmdir
run #7: crashed: INFO: task hung in corrupted
run #8: crashed: INFO: task hung in vfs_rmdir
run #9: crashed: INFO: task hung in vfs_rmdir
representative crash: INFO: task hung in vfs_rmdir, 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_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DISPLAY_DP_AUX_BUS DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER 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 EVM_EXTRA_SMACK_XATTRS 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 GENERIC_IRQ_STAT_SNAPSHOT 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_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_EISA HAVE_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_IRQCHIP HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_KVM_READONLY_MEM 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_IPV6 IP_VS_LBLC IP_VS_LBLCR IP_VS_LC IP_VS_MH IP_VS_NFCT IP_VS_NQ 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_COMPAT NFT_COMPAT_ARP NFT_FWD_NETDEV NF_TABLES NF_TABLES_ARP 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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing current HEAD 7586ac7c340c3672f116052c1d150f134810965b
testing commit 7586ac7c340c3672f116052c1d150f134810965b gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 07490900c2f44fa649eaa86939e239359db42fc13c4b2410ff7b8b3bc64d1443
all runs: crashed: INFO: task hung in vfs_rmdir
representative crash: INFO: task hung in vfs_rmdir, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 4h22m28.974298013s (build: 2h21m29.474115704s, test: 57m12.198960489s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'thermal-6.15-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
crash: INFO: task hung in vfs_rmdir
INFO: task syz-executor:3466 blocked for more than 143 seconds.
Not tainted 6.15.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:13544 pid:3466 tgid:3465 ppid:3051 task_flags:0x400140 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x756/0xc10 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+0x3d4/0x6e0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x61/0x90 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:867 [inline]
vfs_rmdir+0x58/0x180 fs/namei.c:4443
do_rmdir+0x124/0x320 fs/namei.c:4509
__do_sys_rmdir fs/namei.c:4528 [inline]
__se_sys_rmdir fs/namei.c:4526 [inline]
__x64_sys_rmdir+0x1c/0x30 fs/namei.c:4526
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0x170 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb04b87cee9
RSP: 002b:00007fb04c5130c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007fb04b9b3fa0 RCX: 00007fb04b87cee9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 00007fb04b8c947f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007fb04b9b3fa0 R15: 00007ffc5f8c8768
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff835ded70 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff835ded70 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff835ded70 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6764
7 locks held by kworker/u8:5/632:
#0: ffff88810007c948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88810007c948 ((wq_completion)events_unbound){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319
#1: ffffc90001783e48 ((work_completion)(&(&kfence_timer)->work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90001783e48 ((work_completion)(&(&kfence_timer)->work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319
#2: ffff888237c19158 (&base->lock){....}-{2:2}, at: lock_timer_base kernel/time/timer.c:1046 [inline]
#2: ffff888237c19158 (&base->lock){....}-{2:2}, at: __mod_timer+0x196/0x390 kernel/time/timer.c:1127
#3: ffffffff84ed6e58 (&obj_hash[i].lock){....}-{2:2}, at: debug_object_activate+0x6c/0x2d0 lib/debugobjects.c:818
#4: ffffffff834f3688 (text_mutex){....}-{3:3}, at: arch_jump_label_transform_apply+0x12/0x30 arch/x86/kernel/jump_label.c:145
#5: ffffffff835ded70 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#5: ffffffff835ded70 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#5: ffffffff835ded70 (rcu_read_lock){....}-{1:2}, at: ___pte_offset_map+0x1f/0x130 mm/pgtable-generic.c:287
#6: ffff88810006d058 (ptlock_ptr(ptdesc)#2){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#6: ffff88810006d058 (ptlock_ptr(ptdesc)#2){....}-{2:2}, at: __pte_offset_map_lock+0xad/0x140 mm/pgtable-generic.c:402
2 locks held by getty/1566:
#0: ffff8881066ff0a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc90002ec72f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c9/0x6f0 drivers/tty/n_tty.c:2222
3 locks held by syz-executor/3466:
#0: ffff88810fe98410 (sb_writers#11){....}-{0:0}, at: do_rmdir+0xae/0x320 fs/namei.c:4497
#1: ffff88817d608e80 (&sb->s_type->i_mutex_key#18/1){....}-{3:3}, at: inode_lock_nested include/linux/fs.h:902 [inline]
#1: ffff88817d608e80 (&sb->s_type->i_mutex_key#18/1){....}-{3:3}, at: do_rmdir+0xd1/0x320 fs/namei.c:4501
#2: ffff88817d608e80 (&sb->s_type->i_mutex_key#19){....}-{3:3}, at: inode_lock include/linux/fs.h:867 [inline]
#2: ffff88817d608e80 (&sb->s_type->i_mutex_key#19){....}-{3:3}, at: vfs_rmdir+0x58/0x180 fs/namei.c:4443
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0xa2/0xf0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x109/0x170 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+0x604/0x630 kernel/hung_task.c:437
kthread+0x200/0x230 kernel/kthread.c:464
ret_from_fork+0x32/0x40 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: 632 Comm: kworker/u8:5 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__phys_addr+0x3d/0x60 arch/x86/mm/physaddr.c:23
Code: 48 ba 00 00 00 00 80 77 00 00 48 01 d0 48 39 c8 77 31 0f b6 0d 55 81 5d 02 48 89 c2 48 d3 ea 48 85 d2 75 1f c3 cc cc cc cc cc <48> 81 f9 00 00 00 20 73 13 48 03 0d d3 17 23 02 48 89 c8 e9 9b f8
RSP: 0000:ffffc90001783cd0 EFLAGS: 00000006
RAX: 0000000000000000 RBX: ffff888100071bc0 RCX: 00000000034ac000
RDX: ffff8881066e0000 RSI: ffffffff83142eb3 RDI: ffffffff834ac000
RBP: 00000000034ac000 R08: ffff88810471a400 R09: 0000000000000006
R10: 00000019ade51000 R11: 0000000000b79800 R12: ffff888102710000
R13: ffff888102710700 R14: ffffffff83617d80 R15: ffff8881066e0000
FS: 0000000000000000(0000) GS:ffff8882b3907000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc8f15c578 CR3: 00000000034ac000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
build_cr3 arch/x86/mm/tlb.c:161 [inline]
switch_mm_irqs_off+0x5f/0x4c0 arch/x86/mm/tlb.c:802
context_switch kernel/sched/core.c:5366 [inline]
__schedule+0x5c6/0xc10 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6860
toggle_allocation_gate+0xa8/0x120 mm/kfence/core.c:852
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x2e4/0x5e0 kernel/workqueue.c:3319
worker_thread+0x20a/0x2f0 kernel/workqueue.c:3400
kthread+0x200/0x230 kernel/kthread.c:464
ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245