ci starts bisection 2025-06-11 23:44:32.495644508 +0000 UTC m=+19097.893822245
bisecting fixing commit since 100ceb4817a2ac650e29f107cf97161ce3e2289a
building syzkaller on 6e87cfa299c98d36e79e8b8718a4126899a3ba2f
ensuring issue is reproducible on original commit 100ceb4817a2ac650e29f107cf97161ce3e2289a

testing commit 100ceb4817a2ac650e29f107cf97161ce3e2289a gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 991e9d7626daaa66f2aa7e9279fbb9e62be64b010f0512f182eb90eace0b5986
run #0: crashed: INFO: rcu detected stall in do_idle
run #1: crashed: INFO: rcu detected stall in smp_call_function
run #2: crashed: INFO: rcu detected stall in syscall_exit_to_user_mode
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in worker_thread
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in vm_area_alloc
run #8: crashed: INFO: task hung in corrupted
run #9: crashed: INFO: rcu detected stall in corrupted
run #10: crashed: INFO: rcu detected stall in worker_thread
run #11: crashed: INFO: rcu detected stall in corrupted
run #12: crashed: INFO: rcu detected stall in worker_thread
run #13: crashed: BUG: workqueue lockup
run #14: crashed: INFO: rcu detected stall in corrupted
run #15: crashed: BUG: soft lockup in addrconf_rs_timer
run #16: crashed: INFO: rcu detected stall in worker_thread
run #17: crashed: INFO: rcu detected stall in worker_thread
run #18: crashed: no output from test machine
run #19: OK
representative crash: INFO: rcu detected stall in do_idle, 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 100ceb4817a2ac650e29f107cf97161ce3e2289a gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: a18799b51d11e2958a7f75a885173a7500a67f29cde9f4db211789c8864f6e90
run #0: crashed: INFO: rcu detected stall in smp_call_function
run #1: crashed: INFO: rcu detected stall in sys_rename
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: task hung in linkwatch_event
run #4: crashed: INFO: task hung in corrupted
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: task hung in corrupted
run #7: crashed: unregister_netdevice: waiting for DEV to become free
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: OK
representative crash: INFO: rcu detected stall in smp_call_function, 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=4091 full=8242 leaves diff=2142
split chunks (needed=false): <2142>
split chunk #0 of len 2142 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 100ceb4817a2ac650e29f107cf97161ce3e2289a gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 73240e13668b57bce1e6ed8874ae6e30355bf4f2cc6928466c6f10c3f5c87aba
run #0: crashed: INFO: rcu detected stall in worker_thread
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in vms_gather_munmap_vmas
run #3: crashed: INFO: rcu detected stall in do_idle
run #4: crashed: INFO: rcu detected stall in worker_thread
run #5: crashed: INFO: rcu detected stall in worker_thread
run #6: crashed: INFO: task hung in del_device_store
run #7: crashed: INFO: rcu detected stall in smp_call_function
run #8: crashed: INFO: rcu detected stall in worker_thread
run #9: crashed: INFO: rcu detected stall in corrupted
representative crash: INFO: rcu detected stall in worker_thread, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit 100ceb4817a2ac650e29f107cf97161ce3e2289a gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
failed building 100ceb4817a2ac650e29f107cf97161ce3e2289a: ld.lld: error: undefined symbol: devm_drm_of_get_bridge
testing without sub-chunk 3/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 100ceb4817a2ac650e29f107cf97161ce3e2289a gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 1546b18a49909c00320c5ea653d3ad33b14e2148331a3d6f21b5a387fc0ae2fe
all runs: OK
false negative chance: 0.000
testing without sub-chunk 4/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit 100ceb4817a2ac650e29f107cf97161ce3e2289a gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: c276a8e90b6bc08671bcdd9fddb66b2efa5950cb0d2442aac2b3ee79e99e9431
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in smp_call_function
run #2: crashed: INFO: rcu detected stall in smp_call_function
run #3: crashed: INFO: rcu detected stall in do_idle
run #4: crashed: INFO: rcu detected stall in worker_thread
run #5: crashed: INFO: rcu detected stall in smp_call_function
run #6: crashed: INFO: rcu detected stall in worker_thread
run #7: crashed: INFO: rcu detected stall in smp_call_function
run #8: crashed: INFO: rcu detected stall in do_idle
run #9: crashed: INFO: task hung in netdev_run_todo
representative crash: INFO: rcu detected stall in corrupted, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 100ceb4817a2ac650e29f107cf97161ce3e2289a gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 5c32c5c0a5cbe992ad6eb78736fdace35e502c55cf414e617081428a6343f37c
all runs: OK
false negative chance: 0.000
minimized to 1284 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL BRIDGE BRIDGE_NETFILTER CAN CARDBUS CFG80211 CFG80211_WEXT CHARGER_BQ24190 CHECKPOINT_RESTORE CMA COMMON_CLK CONTIG_ALLOC DAX DLM DRM DRM_BRIDGE DRM_CLIENT_SELECTION DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD 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 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_CXUSB_ANALOG 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_BACKED_BY_FILE 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 EXTCON_PTN5150 EXTCON_USBC_TUSB320 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_DEVICE 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_PHY GENERIC_PTDUMP GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GNSS GNSS_USB GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_LJCA GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GUEST_PERF_EVENTS GVE HAMRADIO 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_BIGBEN_FF HID_CMEDIA HID_CORSAIR HID_COUGAR HID_CP2112 HID_CREATIVE_SB0540 HID_ELAN HID_ELECOM HID_ELO HID_EMS_FF HID_EVISION HID_FT260 HID_GEMBIRD HID_GFRM HID_GLORIOUS HID_GOOGLE_STADIA_FF HID_GREENASIA HID_GT683R HID_HOLTEK HID_ICADE HID_JABRA HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LETSKETCH HID_LOGITECH HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2200 HID_MCP2221 HID_MEGAWORLD_FF HID_MULTITOUCH HID_NINTENDO 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_PXRC HID_RAZER HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SEMITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_INTEL_HINGE 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_SIGMAMICRO HID_SPEEDLINK HID_STEELSERIES HID_THINGM HID_TIVO HID_TOPRE HID_TWINHAN HID_U2FZERO HID_UCLOGIC HID_UDRAW_PS3 HID_VIEWSONIC HID_VIVALDI HID_VIVALDI_COMMON HID_VRC2 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XIAOMI HID_XINMO HID_ZEROPLUS HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS HSR I2C_ALGOBIT I2C_CHARDEV I2C_CP2615 I2C_DESIGNWARE_CORE I2C_DESIGNWARE_PLATFORM I2C_DIOLAN_U2C I2C_DLN2 I2C_HID_ACPI I2C_HID_CORE I2C_HID_OF I2C_LJCA 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_APPRAISE IMA_APPRAISE_MODSIG 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_JOYSTICK INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSE INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_UINPUT INPUT_YEALINK INTEGRITY INTEGRITY_ASYMMETRIC_KEYS INTEGRITY_AUDIT INTEGRITY_SIGNATURE INTEGRITY_TRUSTED_KEYRING INTEL_CHTWC_INT33FE INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_ISHTP_ECLITE INTEL_ISH_FIRMWARE_DOWNLOADER INTEL_ISH_HID INTEL_SOC_PMIC_CHTWC INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_DRIVER IOMMUFD_DRIVER_CORE 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_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_REMAP IRQ_TIME_ACCOUNTING IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_IMON_RAW IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TOY IR_TTUSBIR ISDN ISDN_CAPI JFFS2_CMODE_PRIORITY JFFS2_COMPRESSION_OPTIONS JFFS2_FS JFFS2_FS_POSIX_ACL JFFS2_FS_SECURITY JFFS2_FS_WRITEBUFFER JFFS2_FS_XATTR JFFS2_LZO JFFS2_RTIME JFFS2_RUBIN JFFS2_SUMMARY JFFS2_ZLIB JFS_DEBUG JFS_FS JFS_POSIX_ACL JFS_SECURITY JOYSTICK_IFORCE JOYSTICK_IFORCE_USB JOYSTICK_PXRC JOYSTICK_XPAD JOYSTICK_XPAD_FF JOYSTICK_XPAD_LEDS KALLSYMS_ABSOLUTE_PERCPU KARMA_PARTITION KCOV KCOV_ENABLE_COMPARISONS KCOV_INSTRUMENT_ALL KEYS_REQUEST_CACHE KEY_DH_OPERATIONS KEY_NOTIFICATIONS KSM KVM KVM_AMD KVM_ASYNC_PF KVM_COMMON KVM_COMPAT KVM_ELIDE_TLB_FLUSH_IF_YOUNG KVM_GENERIC_DIRTYLOG_READ_PROTECT KVM_GENERIC_HARDWARE_ENABLING KVM_GENERIC_MEMORY_ATTRIBUTES KVM_GENERIC_MMU_NOTIFIER KVM_GENERIC_PRE_FAULT_MEMORY KVM_GENERIC_PRIVATE_MEM KVM_HYPERV KVM_INTEL KVM_MMIO KVM_PRIVATE_MEM KVM_PROVE_MMU KVM_SW_PROTECTED_VM KVM_VFIO KVM_X86 KVM_XEN KVM_XFER_TO_GUEST_WORK L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LCD_CLASS_DEVICE LDM_PARTITION LD_IS_BFD LEGACY_PTYS LIBCRC32C LIBNVDIMM LINEAR_RANGES LLC LLC2 LOGIG940_FF LOGIRUMBLEPAD2_FF LOGITECH_FF LOGIWHEELS_FF LOGO LOGO_LINUX_MONO LOGO_LINUX_VGA16 LPC_ICH LWTUNNEL LWTUNNEL_BPF LZ4HC_COMPRESS LZ4_COMPRESS MAC80211 MAC80211_HAS_RC MAC80211_HWSIM MAC80211_MESH MAC80211_RC_DEFAULT_MINSTREL MAC80211_RC_MINSTREL MAC802154 MACSEC MACVLAN MACVTAP MAC_PARTITION MAPPING_DIRTY_HELPERS MCORE2 MDIO_MVUSB MD_RAID0 MD_RAID1 MD_RAID10 MD_RAID456 MEDIA_ANALOG_TV_SUPPORT MEDIA_ATTACH MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_CONTROLLER_DVB MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_SUPPORT_FILTER MEDIA_TEST_SUPPORT MEDIA_TUNER MEDIA_TUNER_MSI001 MEDIA_USB_SUPPORT MEMORY_BALLOON MEMORY_HOTPLUG MEMORY_HOTPLUG_DEFAULT_ONLINE MEMORY_HOTREMOVE MEMORY_ISOLATION MEMREGION MEMSTICK MEMSTICK_REALTEK_USB MEM_SOFT_DIRTY MFD_CORE MFD_DLN2 MFD_SYSCON MFD_VIPERBOARD MHI_BUS MHI_WWAN_CTRL MHP_MEMMAP_ON_MEMORY MICROCHIP_PHY MINIX_FS MINIX_SUBPARTITION MIN_HEAP MISC_RTSX MISC_RTSX_USB MISDN MISDN_DSP MISDN_HFCUSB MISDN_L1OIP MKISS MLX4_CORE MLX4_INFINIBAND MMC MMC_REALTEK_USB MMC_USHC MMC_VUB300 MODULE_SRCVERSION_ALL MODVERSIONS MOST MOST_USB_HDM MOUSE_APPLETOUCH MOUSE_BCM5974 MOUSE_PS2 MOUSE_PS2_ALPS MOUSE_PS2_BYD MOUSE_PS2_CYPRESS MOUSE_PS2_FOCALTECH MOUSE_PS2_LIFEBOOK MOUSE_PS2_LOGIPS2PP MOUSE_PS2_SMBUS MOUSE_PS2_SYNAPTICS 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ZPOOL ZRAM ZRAM_BACKEND_FORCE_LZO ZRAM_BACKEND_LZO ZRAM_DEF_COMP_LZO ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_842 ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_Z3FOLD_DEPRECATED]
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing current HEAD 403d1338a4a59cfebb4ded53fa35fbd5119f36b1
testing commit 403d1338a4a59cfebb4ded53fa35fbd5119f36b1 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: ef8f00c1466d45dd3f2f392d76fd8ae5632743d2f615c9f088e167462b4acb90
run #0: crashed: INFO: rcu detected stall in exit_to_user_mode_loop
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: BUG: soft lockup in smp_call_function
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in smp_call_function
run #5: crashed: INFO: task hung in new_device_store
run #6: crashed: INFO: rcu detected stall in worker_thread
run #7: crashed: INFO: task hung in addrconf_dad_work
run #8: crashed: INFO: task hung in corrupted
run #9: crashed: INFO: task hung in corrupted
representative crash: INFO: rcu detected stall in exit_to_user_mode_loop, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 3h6m46.207126393s (build: 2h0m23.485690571s, test: 57m36.291894571s)
crash still not fixed or there were kernel test errors
commit msg: mm: pgtable: fix pte_swp_exclusive
crash: INFO: rcu detected stall in exit_to_user_mode_loop
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=cc7c/1/0x4000000000000000 softirq=11718/11762 fqs=0
rcu: 	(detected by 1, t=10004 jiffies, g=6485, q=2789 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5479 Comm: syz-executor Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:468 [inline]
RIP: 0010:lock_is_held_type+0x6e/0x170 kernel/locking/lockdep.c:5942
Code: 25 08 30 e0 87 41 83 bc 24 4c 0a 00 00 00 0f 85 d8 00 00 00 89 f5 49 89 fe 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 3c 24 fa <48> c7 c7 3e d1 65 85 e8 06 0f 00 00 65 ff 05 8f 7c 56 03 41 83 bc
RSP: 0018:ffffc90000003eb8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff888107b05340
RDX: 0000000000010000 RSI: 00000000ffffffff RDI: ffff888237c1b798
RBP: 00000000ffffffff R08: 0000000000080000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff83edc9a0 R12: ffff888107b05340
R13: 0000002938f4c0e7 R14: ffff888237c1b798 R15: 0000000000000046
FS:  0000000000000000(0000) GS:ffff8882afe11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fabfcd47ab8 CR3: 0000000005ccc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_is_held include/linux/lockdep.h:249 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1727 [inline]
 __hrtimer_run_queues+0xea/0x510 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x13e/0x2c0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x84/0x200 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline]
RIP: 0010:rcu_is_watching+0x20/0x40 kernel/rcu/tree.c:746
Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 ff 05 75 57 8b 06 e8 70 27 35 03 89 c0 48 8b 04 c5 60 3c 8b 85 8b 80 18 5c e1 87 <65> ff 0d 59 57 8b 06 74 0c 83 e0 04 c1 e8 02 e9 3c 54 36 03 cc 0f
RSP: 0018:ffffc900021478a0 EFLAGS: 00000286
RAX: 000000000002cc7c RBX: ffffc90002147a01 RCX: edec800185a8e000
RDX: 6779c5afb0b0578b RSI: ffffffff8565d100 RDI: ffffffff85879802
RBP: ffffea0005bcb9c0 R08: 0000000000080000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff81574e50 R12: 0000000005bcb9c0
R13: 0000000000000000 R14: 0000000000000002 R15: ffffea0005bcb9c0
 trace_mm_page_free include/trace/events/kmem.h:136 [inline]
 free_pages_prepare mm/page_alloc.c:1172 [inline]
 free_unref_folios+0xd1/0x8e0 mm/page_alloc.c:2763
 folios_put_refs+0x371/0x3e0 mm/swap.c:992
 free_pages_and_swap_cache+0x2b7/0x2f0 mm/swap_state.c:267
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:397 [inline]
 tlb_flush_mmu+0x243/0x370 mm/mmu_gather.c:404
 tlb_finish_mmu+0x5d/0xb0 mm/mmu_gather.c:497
 exit_mmap+0x388/0x700 mm/mmap.c:1297
 __mmput+0xa5/0x200 kernel/fork.c:1121
 exit_mm+0xbf/0x160 kernel/exit.c:581
 do_exit+0x2e4/0xf70 kernel/exit.c:943
 do_group_exit+0xb2/0xf0 kernel/exit.c:1104
 get_signal+0xc5a/0xd90 kernel/signal.c:3034
 arch_do_signal_or_restart+0x96/0x480 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x70/0xf0 kernel/entry/common.c:111
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x181/0x250 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe8ad3b85a3
Code: Unable to access opcode bytes at 0x7fe8ad3b8579.
RSP: 002b:00007fe8ad69fd78 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00000000000000c2 RCX: 00007fe8ad3b85a3
RDX: 00007fe8ad69fd90 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fe8ad69fdec R08: 0000000022628781 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000032
R13: 000000000001a820 R14: 00007fe8ad69fe40 R15: 0000000000000060
 </TASK>
rcu: rcu_preempt kthread starved for 10004 jiffies! g6485 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:14216 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x77b/0xc70 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0xac/0x140 kernel/sched/core.c:6878
 schedule_timeout+0x106/0x190 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x19e/0x670 kernel/rcu/tree.c:2054
 rcu_gp_kthread+0x1c/0x150 kernel/rcu/tree.c:2256
 kthread+0x2bd/0x300 kernel/kthread.c:464
 ret_from_fork+0x138/0x240 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x7b5/0xb50 kernel/smp.c:885
Code: 34 c5 60 3c 8b 85 4d 03 34 24 66 90 41 8b 6e 08 89 ee 83 e6 01 31 ff e8 b9 65 05 00 83 e5 01 75 07 e8 6f 61 05 00 eb 18 f3 90 <41> f7 46 08 01 00 00 00 74 07 e8 5c 61 05 00 eb ed e8 55 61 05 00
RSP: 0018:ffffc9000006b200 EFLAGS: 00000293
RAX: ffffffff815b6ec4 RBX: 0000000000000000 RCX: ffff88810168d340
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff81440400 R09: 0000000000000007
R10: 0000000000000000 R11: ffffffff81440400 R12: ffff888237d2e9c0
R13: ffff888237d2ea40 R14: ffff888237c34ac0 R15: 00000000fffffff8
FS:  0000000000000000(0000) GS:ffff8882aff11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5248ba6368 CR3: 0000000116aa0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
 flush_tlb_mm_range+0x265/0x610 arch/x86/mm/tlb.c:1451
 flush_tlb_page arch/x86/include/asm/tlbflush.h:324 [inline]
 ptep_clear_flush+0xa6/0xe0 mm/pgtable-generic.c:101
 page_vma_mkclean_one+0x197/0x330 mm/rmap.c:1059
 page_mkclean_one+0xcd/0x110 mm/rmap.c:1100
 __rmap_walk_file+0x236/0x380 mm/rmap.c:2897
 folio_mkclean+0x109/0x170 mm/rmap.c:1132
 folio_clear_dirty_for_io+0xe2/0x4c0 mm/page-writeback.c:2964
 mpage_submit_folio+0x39/0x1a0 fs/ext4/inode.c:2038
 mpage_map_and_submit_buffers fs/ext4/inode.c:2303 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2439 [inline]
 ext4_do_writepages+0xcea/0x19c0 fs/ext4/inode.c:2863
 ext4_writepages+0x199/0x310 fs/ext4/inode.c:2953
 do_writepages+0x122/0x280 mm/page-writeback.c:2636
 __writeback_single_inode+0x79/0x770 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x487/0x980 fs/fs-writeback.c:1976
 __writeback_inodes_wb+0x5e/0x140 fs/fs-writeback.c:2047
 wb_writeback+0x240/0x6a0 fs/fs-writeback.c:2158
 wb_check_old_data_flush fs/fs-writeback.c:2262 [inline]
 wb_do_writeback fs/fs-writeback.c:2315 [inline]
 wb_workfn+0x535/0x820 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x3e4/0x8c0 kernel/workqueue.c:3321
 worker_thread+0x36d/0x4e0 kernel/workqueue.c:3402
 kthread+0x2bd/0x300 kernel/kthread.c:464
 ret_from_fork+0x138/0x240 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
sched: DL replenish lagged too much