ci starts bisection 2025-01-19 21:13:43.616628151 +0000 UTC m=+156759.948729368 bisecting cause commit starting from 595523945be0a5a2f12a1c04772383293fbc04a1 building syzkaller on f2cb035c8f931efff4a020b164e657f16f51934b ensuring issue is reproducible on original commit 595523945be0a5a2f12a1c04772383293fbc04a1 testing commit 595523945be0a5a2f12a1c04772383293fbc04a1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3cecec1177f2357c394bdb9f0efdd6848e78d94718f646f6483b6713d0fb8e9c run #0: crashed: WARNING: possible circular locking dependency detected run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in n_tty_flush_buffer run #4: crashed: possible deadlock in n_tty_receive_buf_common run #5: crashed: possible deadlock in n_tty_flush_buffer run #6: crashed: possible deadlock in n_tty_flush_buffer run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: crashed: possible deadlock in tty_buffer_flush run #14: crashed: possible deadlock in tty_buffer_flush run #15: crashed: possible deadlock in n_tty_receive_buf_common run #16: crashed: possible deadlock in tty_buffer_flush run #17: crashed: possible deadlock in tty_buffer_flush run #18: crashed: INFO: task hung in console_callback run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 595523945be0a5a2f12a1c04772383293fbc04a1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 212eeba84c1a9bed808336eea88f26885aa313486251d982aa40f1958e3ca108 run #0: crashed: possible deadlock in n_tty_flush_buffer run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: possible deadlock in n_tty_flush_buffer, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed kconfig minimization: base=4046 full=8243 leaves diff=2122 split chunks (needed=false): <2122> split chunk #0 of len 2122 into 5 parts testing without sub-chunk 1/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 595523945be0a5a2f12a1c04772383293fbc04a1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 303a4fa74ca62d7dcc9d0510e4c6a2daaaa8a0cb0643ed32fd73cddae92c66df run #0: crashed: possible deadlock in n_tty_flush_buffer run #1: crashed: possible deadlock in n_tty_flush_buffer run #2: crashed: possible deadlock in n_tty_flush_buffer run #3: crashed: possible deadlock in n_tty_flush_buffer run #4: crashed: possible deadlock in n_tty_flush_buffer run #5: crashed: possible deadlock in n_tty_flush_buffer run #6: crashed: possible deadlock in n_tty_receive_buf_common run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in n_tty_flush_buffer, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 595523945be0a5a2f12a1c04772383293fbc04a1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 failed building 595523945be0a5a2f12a1c04772383293fbc04a1: drivers/gpu/drm/bridge/aux-bridge.c:116: undefined reference to `devm_drm_of_get_bridge' testing without sub-chunk 3/5 disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 595523945be0a5a2f12a1c04772383293fbc04a1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 01c5a40f271ac4713facb038699500936d528fff372973ef2336cefb37f63b60 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in n_tty_flush_buffer run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in n_tty_receive_buf_common run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing commit 595523945be0a5a2f12a1c04772383293fbc04a1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e65f712749bdb0ef596836f9480cb6dc530b4a7f1f18e4d4284fc74be70e7e37 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in n_tty_receive_buf_common run #6: crashed: WARNING: possible circular locking dependency detected run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 595523945be0a5a2f12a1c04772383293fbc04a1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 24655290785ea7110ebf8663df9b1af8873877eadad37381faae810c500034f4 all runs: OK false negative chance: 0.000 minimized to 847 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CHARGER_BQ24190 CMA COMMON_CLK CONTIG_ALLOC DAX DLM DRM DRM_BRIDGE 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 EEPROM_93CX6 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 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 GROUP_SCHED_WEIGHT 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_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_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2200 HID_MCP2221 HID_MEGAWORLD_FF 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_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 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_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_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_PROTO_TCP IRQ_REMAP IRQ_TIME_ACCOUNTING KVM KVM_INTEL LAPB LCD_CLASS_DEVICE LIBNVDIMM MAC802154 MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER 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 NOP_USB_XCEIV PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RAS RC_CORE REGULATOR RFKILL SND SOUND SPI SSB STAGING TAP TARGET_CORE TRANSPARENT_HUGEPAGE TUN TYPEC TYPEC_MUX_PI3USB30532 USB_AMD5536UDC USB_ATM USB_CDNSP_GADGET USB_CDNSP_HOST USB_CDNSP_PCI USB_CDNS_HOST USB_CDNS_SUPPORT USB_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_GENERIC USB_CHIPIDEA_HOST USB_CHIPIDEA_MSM USB_CHIPIDEA_NPCM USB_CHIPIDEA_PCI USB_CHIPIDEA_UDC USB_CONFIGFS USB_CONFIGFS_ACM USB_CONFIGFS_ECM USB_CONFIGFS_ECM_SUBSET USB_CONFIGFS_EEM USB_CONFIGFS_F_FS USB_CONFIGFS_F_HID USB_CONFIGFS_F_LB_SS USB_CONFIGFS_F_MIDI USB_CONFIGFS_F_MIDI2 USB_CONFIGFS_F_PRINTER USB_CONFIGFS_F_TCM USB_CONFIGFS_F_UAC1 USB_CONFIGFS_F_UAC1_LEGACY USB_CONFIGFS_F_UAC2 USB_CONFIGFS_F_UVC USB_CONFIGFS_MASS_STORAGE USB_CONFIGFS_NCM USB_CONFIGFS_OBEX USB_CONFIGFS_PHONET USB_CONFIGFS_RNDIS USB_CONFIGFS_SERIAL USB_CONN_GPIO USB_CXACRU USB_CYPRESS_CY7C63 USB_CYTHERM USB_DSBR USB_DUMMY_HCD USB_DWC2 USB_DWC2_HOST USB_DWC2_PCI USB_DWC3 USB_DWC3_GADGET USB_DWC3_HAPS USB_DWC3_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T USB_EHCI_FSL USB_EHCI_HCD_PLATFORM USB_EHCI_ROOT_HUB_TT USB_EHSET_TEST_FIXTURE USB_EMI26 USB_EMI62 USB_EPSON2888 USB_EZUSB_FX2 USB_FEW_INIT_RETRIES USB_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI USB_F_MIDI2 USB_F_NCM USB_F_OBEX USB_F_PHONET USB_F_PRINTER USB_F_RNDIS USB_F_SERIAL USB_F_SS_LB USB_F_SUBSET USB_F_TCM USB_F_UAC1 USB_F_UAC1_LEGACY USB_F_UAC2 USB_F_UVC USB_GADGET USB_GADGETFS USB_GADGET_DEBUG_FILES USB_GADGET_DEBUG_FS USB_GL860 USB_GOKU USB_GR_UDC USB_GSPCA USB_GSPCA_BENQ USB_GSPCA_CONEX USB_GSPCA_CPIA1 USB_GSPCA_DTCS033 USB_GSPCA_ETOMS USB_GSPCA_FINEPIX USB_GSPCA_JEILINJ USB_GSPCA_JL2005BCD USB_GSPCA_KINECT USB_GSPCA_KONICA USB_GSPCA_MARS USB_GSPCA_MR97310A USB_GSPCA_NW80X USB_GSPCA_OV519 USB_GSPCA_OV534 USB_GSPCA_OV534_9 USB_GSPCA_PAC207 USB_GSPCA_PAC7302 USB_GSPCA_PAC7311 USB_GSPCA_SE401 USB_GSPCA_SN9C2028 USB_GSPCA_SN9C20X USB_GSPCA_SONIXB USB_GSPCA_SONIXJ USB_GSPCA_SPCA1528 USB_GSPCA_SPCA500 USB_GSPCA_SPCA501 USB_GSPCA_SPCA505 USB_GSPCA_SPCA506 USB_GSPCA_SPCA508 USB_GSPCA_SPCA561 USB_GSPCA_SQ905 USB_GSPCA_SQ905C USB_GSPCA_SQ930X USB_GSPCA_STK014 USB_GSPCA_STK1135 USB_GSPCA_STV0680 USB_GSPCA_SUNPLUS USB_GSPCA_T613 USB_GSPCA_TOPRO USB_GSPCA_TOUPTEK USB_GSPCA_TV8532 USB_GSPCA_VC032X USB_GSPCA_VICAM USB_GSPCA_XIRLINK_CIT USB_GSPCA_ZC3XX USB_HACKRF USB_HCD_BCMA USB_HCD_SSB USB_HSIC_USB3503 USB_HSIC_USB4604 USB_HSO USB_HUB_USB251XB USB_IDMOUSE USB_IOWARRIOR USB_IPHETH USB_ISIGHTFW USB_ISP116X_HCD USB_ISP1301 USB_ISP1760 USB_ISP1760_DUAL_ROLE USB_ISP1760_HCD USB_ISP1761_UDC USB_KAWETH USB_KC2190 USB_KEENE USB_LAN78XX USB_LCD USB_LD USB_LEDS_TRIGGER_USBPORT USB_LED_TRIG USB_LEGOTOWER USB_LGM_PHY USB_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_LJCA USB_M5602 USB_MA901 USB_MAX3420_UDC USB_MAX3421_HCD USB_MDC800 USB_MICROTEK USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC USB_MV_U3D USB_MV_UDC USB_NET2272 USB_NET2272_DMA USB_NET2280 USB_NET_AQC111 USB_NET_AX88179_178A USB_NET_AX8817X USB_NET_CDCETHER USB_NET_CDC_EEM USB_NET_CDC_MBIM USB_NET_CDC_NCM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_CH9200 USB_NET_CX82310_ETH USB_NET_DM9601 USB_NET_GL620A USB_NET_HUAWEI_CDC_NCM USB_NET_INT51X1 USB_NET_KALMIA USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_QMI_WWAN USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_OXU210HP_HCD USB_PEGASUS USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PCI_RENESAS USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER UVC_COMMON U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VETH VFIO VFIO_DEVICE_CDEV VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_TASK VHOST_VDPA VHOST_VSOCK VIDEO VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_FS VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WAN WANT_DEV_COREDUMP WEXT_CORE WEXT_PROC WIREGUARD WIRELESS WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK X86_X2APIC X86_X32_ABI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA Z3FOLD Z3FOLD_DEPRECATED ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZONE_DEVICE 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 [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed picked [v6.12 v6.11 v6.10 v6.8 v6.6 v6.4 v6.2 v6.0 v5.17 v5.14 v5.11 v5.8 v5.5 v5.2 v4.20 v4.19] out of 35 release tags testing release v6.12 testing commit adc218676eef25575469234709c2d87185ca223a gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: afa74575a599f0e12233a48dd209914abc44f34c49bc2f442c381c5c9b2c6c43 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in n_tty_receive_buf_common run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: WARNING: possible circular locking dependency detected run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v6.11 testing commit 98f7e32f20d28ec452afb208f9cffc08448a2652 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4b1f6cac9fd111efdaa7d03337622f3c24cfcaea79f2ce6865e7f8be1a3e23ec run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v6.10 testing commit 0c3836482481200ead7b416ca80c68a29cfdaabd gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e73b01c6106ea7fb277810fa4afb9502e6ee66ca6f00ba798d3d783ea564b46f run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in n_tty_flush_buffer run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v6.8 testing commit e8f897f4afef0031fe618a8e94127a0934896aba gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 276a4a9f367af1a27ccc7c1821a8d7e2688ccc590cd803469c5c83d3fe06c0aa run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: crashed: possible deadlock in tty_buffer_flush run #14: crashed: possible deadlock in tty_buffer_flush run #15: crashed: possible deadlock in tty_buffer_flush run #16: crashed: possible deadlock in tty_buffer_flush run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v6.6 testing commit ffc253263a1375a65fa6c9f62a893e9767fbebfa gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 934fd70be47a0f700f7dc0b71c0151fe29ef8616e72aac36a2020f2a8ae0e2a8 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: crashed: possible deadlock in tty_buffer_flush run #14: crashed: possible deadlock in tty_buffer_flush run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v6.4 testing commit 6995e2de6891c724bfeb2db33d7b87775f913ad1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9e0d3e1634fd5d47aa9aa59c6ee985d6eac241f639df4f106c14a50262570c13 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: crashed: possible deadlock in tty_buffer_flush run #14: crashed: possible deadlock in tty_buffer_flush run #15: crashed: possible deadlock in tty_buffer_flush run #16: crashed: possible deadlock in tty_buffer_flush run #17: crashed: possible deadlock in tty_buffer_flush run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v6.2 testing commit c9c3395d5e3dcc6daee66c6908354d47bf98cb0c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 03f10184cab4d0a19e4345a89ff8177f094f2458484833d1aa331e14bf30081a run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: crashed: possible deadlock in tty_buffer_flush run #14: crashed: possible deadlock in tty_buffer_flush run #15: crashed: possible deadlock in tty_buffer_flush run #16: crashed: possible deadlock in tty_buffer_flush run #17: crashed: possible deadlock in tty_buffer_flush run #18: crashed: possible deadlock in tty_buffer_flush run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v6.0 testing commit 4fe89d07dcc2804c8b562f6c7896a45643d34b2f gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8003643c6a3c6e0ecaf37525175048c44562eafc44cd0d2f38304b61e4e6f02a run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: crashed: possible deadlock in tty_buffer_flush run #14: crashed: possible deadlock in tty_buffer_flush run #15: crashed: possible deadlock in tty_buffer_flush run #16: crashed: possible deadlock in tty_buffer_flush run #17: crashed: possible deadlock in tty_buffer_flush run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v5.17 testing commit f443e374ae131c168a065ea1748feac6b2e76613 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c2017a26ae557c3ef2c64c111aec2adad00251d00377341037100d23b29ff8d0 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: crashed: possible deadlock in tty_buffer_flush run #14: crashed: possible deadlock in tty_buffer_flush run #15: crashed: possible deadlock in tty_buffer_flush run #16: crashed: possible deadlock in tty_buffer_flush run #17: crashed: possible deadlock in tty_buffer_flush run #18: crashed: possible deadlock in tty_buffer_flush run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v5.14 testing commit 7d2a07b769330c34b4deabeed939325c77a7ec2f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e74f92cb0de4c05b180b2e2f3937d231057d352dca9cb63940a35fd3ff3e4a41 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: crashed: possible deadlock in tty_buffer_flush run #14: crashed: possible deadlock in tty_buffer_flush run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] testing release v5.11 testing commit f40ddce88593482919761f74910f42f4b84c004b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2b81ced265ffa44b48922ea132ef34e99cfeffd171c9887254dcc8b1c184dccd all runs: OK false negative chance: 0.000 # git bisect start 7d2a07b769330c34b4deabeed939325c77a7ec2f f40ddce88593482919761f74910f42f4b84c004b Bisecting: 24610 revisions left to test after this (roughly 15 steps) [85f3f17b5db2dd9f8a094a0ddc665555135afd22] Merge branch 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into block-5.13 testing commit 85f3f17b5db2dd9f8a094a0ddc665555135afd22 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4e85f35fb228561749723d834ad05391b84b9542c001880cdb562cc1cf9aa049 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: crashed: possible deadlock in tty_buffer_flush run #14: crashed: possible deadlock in tty_buffer_flush run #15: crashed: possible deadlock in tty_buffer_flush run #16: crashed: possible deadlock in tty_buffer_flush run #17: crashed: possible deadlock in tty_buffer_flush run #18: crashed: possible deadlock in tty_buffer_flush run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] # git bisect bad 85f3f17b5db2dd9f8a094a0ddc665555135afd22 Bisecting: 11313 revisions left to test after this (roughly 14 steps) [e216674a5b5781694223ff3f0c4f2cc721a36ab0] Merge branch '10GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue testing commit e216674a5b5781694223ff3f0c4f2cc721a36ab0 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 875147b8dd7ee9275161e29ce6ca6aa7fc9e1922e1e83967ad6ce2851c8d2124 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] # git bisect bad e216674a5b5781694223ff3f0c4f2cc721a36ab0 Bisecting: 5786 revisions left to test after this (roughly 13 steps) [de1617578849acab8e16c9ffdce39b91fb50639d] Merge tag 'media/v5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media testing commit de1617578849acab8e16c9ffdce39b91fb50639d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3a836a142d9f25a4da09e13b64170b653db7b4e84fc1582d0cfdc671531634ad all runs: OK false negative chance: 0.000 # git bisect good de1617578849acab8e16c9ffdce39b91fb50639d Bisecting: 2921 revisions left to test after this (roughly 12 steps) [36c1b20d15703662aa0f14a32a8bd19ab3a33076] Merge tag 'i3c/for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux testing commit 36c1b20d15703662aa0f14a32a8bd19ab3a33076 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8df971e54958ffb6f7b89cc5133d2fff4c50bcde26142b0087b0ad7b0ac3897b all runs: OK false negative chance: 0.000 # git bisect good 36c1b20d15703662aa0f14a32a8bd19ab3a33076 Bisecting: 1461 revisions left to test after this (roughly 11 steps) [a56ff24efbba18f4361415597f145f4b5773be3e] Merge tag 'objtool-core-2021-02-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit a56ff24efbba18f4361415597f145f4b5773be3e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ee6eb53aec280ab4a9a50fd53c3268f775f1735bde02ec8653a021f332e49542 all runs: OK false negative chance: 0.000 # git bisect good a56ff24efbba18f4361415597f145f4b5773be3e Bisecting: 692 revisions left to test after this (roughly 10 steps) [e229b429bb4af24d9828758c0c851bb6a4169400] Merge tag 'char-misc-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc testing commit e229b429bb4af24d9828758c0c851bb6a4169400 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5b8d585ef1e65a4b5c9f63d5b953b9b7a32f27f4d16335e294fe7371fb7bf38a all runs: OK false negative chance: 0.000 # git bisect good e229b429bb4af24d9828758c0c851bb6a4169400 Bisecting: 336 revisions left to test after this (roughly 9 steps) [5b47b10e8fb92f8beca6aa8a7d97fc84e090384c] Merge tag 'pci-v5.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci testing commit 5b47b10e8fb92f8beca6aa8a7d97fc84e090384c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 60b3a65d18c7df9eac6d09fb5000111f8f62e08901e87d1a3ea5ed5e8fde8915 all runs: OK false negative chance: 0.000 # git bisect good 5b47b10e8fb92f8beca6aa8a7d97fc84e090384c Bisecting: 154 revisions left to test after this (roughly 7 steps) [fdce29602f865b016012eadeaec99800da916d3d] Merge tag 'drm-next-2021-02-26' of git://anongit.freedesktop.org/drm/drm testing commit fdce29602f865b016012eadeaec99800da916d3d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 39cfc138b4df157e65257d0c926456194b4b353cf6d8db528272940a93bfcf73 all runs: OK false negative chance: 0.000 # git bisect good fdce29602f865b016012eadeaec99800da916d3d Bisecting: 77 revisions left to test after this (roughly 6 steps) [0d1bf7a5e2252f1683ace3675ec8c4562bf1b0ac] Merge tag 'wireless-drivers-2021-02-26' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers testing commit 0d1bf7a5e2252f1683ace3675ec8c4562bf1b0ac gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 92cdb2c05fe5474d6dd1721935093628a2f642a183d13a7389d1d5d80eddb4e1 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] # git bisect bad 0d1bf7a5e2252f1683ace3675ec8c4562bf1b0ac Bisecting: 45 revisions left to test after this (roughly 5 steps) [16c10bede8b3d8594279752bf53153491f3f944f] virtio-input: add multi-touch support testing commit 16c10bede8b3d8594279752bf53153491f3f944f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7042c22bf80c64c53b58de3a62a8c1c1ea0400ab82949128dc68b981d86cce8b run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] # git bisect bad 16c10bede8b3d8594279752bf53153491f3f944f Bisecting: 15 revisions left to test after this (roughly 4 steps) [0b0177089c60236b6a785346cfaab081acd9be26] virtio-pci-modern: introduce helpers for setting and getting features testing commit 0b0177089c60236b6a785346cfaab081acd9be26 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5759f66bfc334437ddeb3c743c0f19cf62ba37cc9853864a5fe65f0ea008e852 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: crashed: possible deadlock in tty_buffer_flush run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] # git bisect bad 0b0177089c60236b6a785346cfaab081acd9be26 Bisecting: 7 revisions left to test after this (roughly 3 steps) [a3c06ae158dd6fa8336157c31d9234689d068d02] vdpa_sim_net: Add support for user supported devices testing commit a3c06ae158dd6fa8336157c31d9234689d068d02 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8fc52b4bbd2d863f8dd846a7158a6ab8714eb79647365bcb5aedc9df998a9ba1 run #0: crashed: possible deadlock in tty_buffer_flush run #1: crashed: possible deadlock in tty_buffer_flush run #2: crashed: possible deadlock in tty_buffer_flush run #3: crashed: possible deadlock in tty_buffer_flush run #4: crashed: possible deadlock in tty_buffer_flush run #5: crashed: possible deadlock in tty_buffer_flush run #6: crashed: possible deadlock in tty_buffer_flush run #7: crashed: possible deadlock in tty_buffer_flush run #8: crashed: possible deadlock in tty_buffer_flush run #9: crashed: possible deadlock in tty_buffer_flush run #10: crashed: possible deadlock in tty_buffer_flush run #11: crashed: possible deadlock in tty_buffer_flush run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: possible deadlock in tty_buffer_flush, types: [LOCKDEP] # git bisect bad a3c06ae158dd6fa8336157c31d9234689d068d02 Bisecting: 3 revisions left to test after this (roughly 2 steps) [fd70a406a344e084ac680c3f14e71d37d6023883] vdpa: Extend routine to accept vdpa device name testing commit fd70a406a344e084ac680c3f14e71d37d6023883 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5db6788e75c1d3212f6ffe61f65526f3c4b2bedbad2a70c2c203865214bc06ee all runs: OK false negative chance: 0.000 # git bisect good fd70a406a344e084ac680c3f14e71d37d6023883 Bisecting: 1 revision left to test after this (roughly 1 step) [903f7bcaedb84ca47998e609015a34ddde93742e] vdpa: Enable a user to add and delete a vdpa device testing commit 903f7bcaedb84ca47998e609015a34ddde93742e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8a6bd6109b3fc5336f3804981d754da56bf3e34928860d5a2ab0b6041b0ab4a1 all runs: OK false negative chance: 0.000 # git bisect good 903f7bcaedb84ca47998e609015a34ddde93742e Bisecting: 0 revisions left to test after this (roughly 0 steps) [bc0d90ee021f1baecd6aaa010d787eb373aa74dd] vdpa: Enable user to query vdpa device info testing commit bc0d90ee021f1baecd6aaa010d787eb373aa74dd gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1ea4967abbb2c11454b54d06b3bcba6180458448b550259174a6f2be239149ce all runs: OK false negative chance: 0.000 # git bisect good bc0d90ee021f1baecd6aaa010d787eb373aa74dd a3c06ae158dd6fa8336157c31d9234689d068d02 is the first bad commit commit a3c06ae158dd6fa8336157c31d9234689d068d02 Author: Parav Pandit Date: Tue Jan 5 12:32:03 2021 +0200 vdpa_sim_net: Add support for user supported devices Enable user to create vdpasim net simulate devices. Show vdpa management device that supports creating, deleting vdpa devices. $ vdpa mgmtdev show vdpasim_net: supported_classes net $ vdpa mgmtdev show -jp { "show": { "vdpasim_net": { "supported_classes": { "net" } } } Create a vdpa device of type networking named as "foo2" from the management device vdpasim: $ vdpa dev add mgmtdev vdpasim_net name foo2 Show the newly created vdpa device by its name: $ vdpa dev show foo2 foo2: type network mgmtdev vdpasim_net vendor_id 0 max_vqs 2 max_vq_size 256 $ vdpa dev show foo2 -jp { "dev": { "foo2": { "type": "network", "mgmtdev": "vdpasim_net", "vendor_id": 0, "max_vqs": 2, "max_vq_size": 256 } } } Delete the vdpa device after its use: $ vdpa dev del foo2 Signed-off-by: Parav Pandit Reviewed-by: Eli Cohen Acked-by: Jason Wang Link: https://lore.kernel.org/r/20210105103203.82508-7-parav@nvidia.com Signed-off-by: Michael S. Tsirkin drivers/vdpa/vdpa_sim/vdpa_sim.c | 3 +- drivers/vdpa/vdpa_sim/vdpa_sim.h | 2 + drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 96 ++++++++++++++++++++++++++---------- 3 files changed, 75 insertions(+), 26 deletions(-) accumulated error probability: 0.00 culprit signature: 8fc52b4bbd2d863f8dd846a7158a6ab8714eb79647365bcb5aedc9df998a9ba1 parent signature: 1ea4967abbb2c11454b54d06b3bcba6180458448b550259174a6f2be239149ce reproducer is flaky (0.35 repro chance estimate) revisions tested: 32, total time: 9h3m44.535041446s (build: 2h29m25.273109788s, test: 6h18m56.902382855s) first bad commit: a3c06ae158dd6fa8336157c31d9234689d068d02 vdpa_sim_net: Add support for user supported devices recipients (to): ["elic@nvidia.com" "jasowang@redhat.com" "mst@redhat.com" "parav@nvidia.com"] recipients (cc): [] crash: possible deadlock in tty_buffer_flush ====================================================== WARNING: possible circular locking dependency detected 5.11.0-syzkaller #0 Not tainted ------------------------------------------------------ kworker/1:3/2444 is trying to acquire lock: ffff8881000608b8 (&buf->lock){+.+.}-{3:3}, at: tty_buffer_flush+0x2a/0x90 drivers/tty/tty_buffer.c:227 but task is already holding lock: ffffffff837e8b60 (console_lock){+.+.}-{0:0}, at: vc_SAK+0xa/0x40 drivers/tty/vt/vt_ioctl.c:1044 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (console_lock){+.+.}-{0:0}: console_lock+0x2a/0x50 kernel/printk/printk.c:2387 con_flush_chars drivers/tty/vt/vt.c:3332 [inline] con_flush_chars+0x18/0x30 drivers/tty/vt/vt.c:3324 __receive_buf drivers/tty/n_tty.c:1651 [inline] n_tty_receive_buf_common+0x2e1/0xc60 drivers/tty/n_tty.c:1744 tty_port_default_receive_buf+0x38/0x60 drivers/tty/tty_port.c:38 receive_buf drivers/tty/tty_buffer.c:481 [inline] flush_to_ldisc+0x86/0xd0 drivers/tty/tty_buffer.c:533 process_one_work+0x289/0x540 kernel/workqueue.c:2275 worker_thread+0x4d/0x330 kernel/workqueue.c:2421 kthread+0x127/0x140 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 -> #1 (&tty->termios_rwsem){++++}-{3:3}: down_read+0x23/0xc0 kernel/locking/rwsem.c:1353 n_tty_receive_buf_common+0x43/0xc60 drivers/tty/n_tty.c:1707 tty_port_default_receive_buf+0x38/0x60 drivers/tty/tty_port.c:38 receive_buf drivers/tty/tty_buffer.c:481 [inline] flush_to_ldisc+0x86/0xd0 drivers/tty/tty_buffer.c:533 process_one_work+0x289/0x540 kernel/workqueue.c:2275 worker_thread+0x4d/0x330 kernel/workqueue.c:2421 kthread+0x127/0x140 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 -> #0 (&buf->lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:2868 [inline] check_prevs_add kernel/locking/lockdep.c:2993 [inline] validate_chain kernel/locking/lockdep.c:3608 [inline] __lock_acquire+0x10e3/0x1aa0 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0xbf/0x3b0 kernel/locking/lockdep.c:5407 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x62/0x620 kernel/locking/mutex.c:1103 tty_buffer_flush+0x2a/0x90 drivers/tty/tty_buffer.c:227 tty_ldisc_flush+0x2e/0x60 drivers/tty/tty_ldisc.c:414 __do_SAK.part.0+0x156/0x1a0 drivers/tty/tty_io.c:2928 vc_SAK+0x24/0x40 drivers/tty/vt/vt_ioctl.c:1054 process_one_work+0x289/0x540 kernel/workqueue.c:2275 worker_thread+0x4d/0x330 kernel/workqueue.c:2421 kthread+0x127/0x140 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 other info that might help us debug this: Chain exists of: &buf->lock --> &tty->termios_rwsem --> console_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(console_lock); lock(&tty->termios_rwsem); lock(console_lock); lock(&buf->lock); *** DEADLOCK *** 4 locks held by kworker/1:3/2444: #0: ffff888100056738 ((wq_completion)events){+.+.}-{0:0}, at: wake_up_worker kernel/workqueue.c:837 [inline] #0: ffff888100056738 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1f2/0x540 kernel/workqueue.c:2238 #1: ffffc900037cfe70 ((work_completion)(&vc_cons[currcons].SAK_work)){+.+.}-{0:0}, at: wake_up_worker kernel/workqueue.c:837 [inline] #1: ffffc900037cfe70 ((work_completion)(&vc_cons[currcons].SAK_work)){+.+.}-{0:0}, at: process_one_work+0x1f2/0x540 kernel/workqueue.c:2238 #2: ffffffff837e8b60 (console_lock){+.+.}-{0:0}, at: vc_SAK+0xa/0x40 drivers/tty/vt/vt_ioctl.c:1044 #3: ffff88812791c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref drivers/tty/tty_ldisc.c:287 [inline] #3: ffff88812791c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_flush+0x13/0x60 drivers/tty/tty_ldisc.c:412 stack backtrace: CPU: 1 PID: 2444 Comm: kworker/1:3 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: events vc_SAK Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x77/0x97 lib/dump_stack.c:120 check_noncircular+0xcc/0xe0 kernel/locking/lockdep.c:2117 check_prev_add kernel/locking/lockdep.c:2868 [inline] check_prevs_add kernel/locking/lockdep.c:2993 [inline] validate_chain kernel/locking/lockdep.c:3608 [inline] __lock_acquire+0x10e3/0x1aa0 kernel/locking/lockdep.c:4832 lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0xbf/0x3b0 kernel/locking/lockdep.c:5407 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x62/0x620 kernel/locking/mutex.c:1103 tty_buffer_flush+0x2a/0x90 drivers/tty/tty_buffer.c:227 tty_ldisc_flush+0x2e/0x60 drivers/tty/tty_ldisc.c:414 __do_SAK.part.0+0x156/0x1a0 drivers/tty/tty_io.c:2928 vc_SAK+0x24/0x40 drivers/tty/vt/vt_ioctl.c:1054 process_one_work+0x289/0x540 kernel/workqueue.c:2275 worker_thread+0x4d/0x330 kernel/workqueue.c:2421 kthread+0x127/0x140 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 tty tty1: SAK: killed process 5101 (syz.2.18): by fd#4 tty tty1: SAK: killed process 5102 (syz.2.18): by fd#4 tty tty1: SAK: killed process 5161 (syz.2.18): by fd#4 usb 6-1: USB disconnect, device number 2 usb 6-1: new high-speed USB device number 3 using dummy_hcd usb 6-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 6-1: New USB device found, idVendor=0926, idProduct=3333, bcdDevice= 0.40 usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 6-1: config 0 descriptor?? keytouch 0003:0926:3333.0009: fixing up Keytouch IEC report descriptor input: HID 0926:3333 as /devices/platform/dummy_hcd.5/usb6/6-1/6-1:0.0/0003:0926:3333.0009/input/input12 keytouch 0003:0926:3333.0009: input,hidraw4: USB HID v0.00 Keyboard [HID 0926:3333] on usb-dummy_hcd.5-1/input0 usb 4-1: USB disconnect, device number 3 usb 4-1: new high-speed USB device number 4 using dummy_hcd usb 4-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 4-1: New USB device found, idVendor=0926, idProduct=3333, bcdDevice= 0.40 usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 4-1: config 0 descriptor?? keytouch 0003:0926:3333.000D: fixing up Keytouch IEC report descriptor input: HID 0926:3333 as /devices/platform/dummy_hcd.3/usb4/4-1/4-1:0.0/0003:0926:3333.000D/input/input16 keytouch 0003:0926:3333.000D: input,hidraw2: USB HID v0.00 Keyboard [HID 0926:3333] on usb-dummy_hcd.3-1/input0 tty tty1: SAK: killed process 5185 (syz.2.26): by fd#4 tty tty1: SAK: killed process 5186 (syz.2.26): by fd#4 tty tty1: SAK: killed process 5195 (syz.2.26): by fd#4 usb 3-1: USB disconnect, device number 4 usb 3-1: new high-speed USB device number 5 using dummy_hcd usb 3-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 3-1: New USB device found, idVendor=0926, idProduct=3333, bcdDevice= 0.40 usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 3-1: config 0 descriptor?? keytouch 0003:0926:3333.0010: fixing up Keytouch IEC report descriptor input: HID 0926:3333 as /devices/platform/dummy_hcd.2/usb3/3-1/3-1:0.0/0003:0926:3333.0010/input/input19 keytouch 0003:0926:3333.0010: input,hidraw0: USB HID v0.00 Keyboard [HID 0926:3333] on usb-dummy_hcd.2-1/input0