ci2 starts bisection 2025-10-03 06:15:36.526599553 +0000 UTC m=+65818.167655551 bisecting fixing commit since bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 building syzkaller on e12e5ba469cd05aa76330394486b1f2a24dd4ef6 ensuring issue is reproducible on original commit bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 testing commit bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8680ffbf7c2b49b85009fd2d6d4e2231525e2430e61b6883af0b56144d0e85fc run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in perf_event_open run #2: crashed: INFO: rcu detected stall in sys_bpf run #3: crashed: INFO: rcu detected stall in perf_event_open run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in perf_event_open run #7: crashed: INFO: rcu detected stall in sys_bpf run #8: crashed: INFO: rcu detected stall in irqentry_exit run #9: crashed: INFO: rcu detected stall in futex run #10: crashed: INFO: rcu detected stall in corrupted run #11: crashed: INFO: rcu detected stall in futex run #12: crashed: INFO: rcu detected stall in sys_bpf run #13: crashed: INFO: rcu detected stall in futex run #14: crashed: INFO: rcu detected stall in perf_event_open run #15: crashed: INFO: rcu detected stall in perf_event_open run #16: crashed: INFO: rcu detected stall in futex run #17: crashed: INFO: rcu detected stall in corrupted run #18: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #19: crashed: INFO: rcu detected stall in futex representative crash: INFO: rcu detected stall in corrupted, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 68b3f40b169c438b493858d4554cf4f3a77bcfd5445a7bcb462e571a9dbe392f all runs: OK false negative chance: 0.000 kconfig minimization: base=3913 full=7799 leaves diff=2161 split chunks (needed=false): <2161> split chunk #0 of len 2161 into 5 parts testing without sub-chunk 1/5 testing commit bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 41d580ce70928d1d0f5d8631845a158392ce6c9430b770ea5862343b6b9fe6b3 run #0: crashed: INFO: rcu detected stall in perf_event_open run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in smp_call_function run #3: crashed: INFO: rcu detected stall in smp_call_function run #4: crashed: INFO: rcu detected stall in perf_event_open run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in irqentry_exit run #7: crashed: INFO: rcu detected stall in smp_call_function run #8: crashed: INFO: rcu detected stall in futex run #9: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2993057451" "root@10.128.1.201:./syz-executor2993057451"]: exit status 255 representative crash: INFO: rcu detected stall in perf_event_open, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 testing commit bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1f3601307d728f2c9a97f85438fdd5e0a1880c0abb0f12ea3ce29dd34177298a run #0: crashed: INFO: rcu detected stall in perf_event_open run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in perf_event_open run #4: crashed: INFO: rcu detected stall in irqentry_exit run #5: crashed: INFO: rcu detected stall in task_numa_work run #6: crashed: INFO: rcu detected stall in sys_bpf run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in smp_call_function run #9: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2696238156" "root@10.128.10.20:./syz-executor2696238156"]: exit status 255 representative crash: INFO: rcu detected stall in perf_event_open, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 testing commit bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a94829317a4fe9db4126e59e472672617e2c91c9f04c28979664f4ce31a41857 run #0: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #4: crashed: INFO: rcu detected stall in futex run #5: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #6: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor818385944" "root@10.128.0.177:./syz-executor818385944"]: exit status 255 run #7: crashed: INFO: rcu detected stall in irqentry_exit run #8: OK run #9: OK representative crash: INFO: rcu detected stall in syscall_enter_from_user_mode, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 testing commit bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fdfefc98660aa2cfbc59cb8c08d485b0489fde5f0d7c9ebca9c33bc4fa98f342 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 testing commit bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 failed building bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06: ld.lld: error: undefined symbol: devm_drm_of_get_bridge minimized to 862 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL BT BT_BREDR BT_HIDP BXT_WC_PMIC_OPREGION CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DAX DLM DRM DVB_CORE ENCRYPTED_KEYS EXTCON FB GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO HID_NVIDIA_SHIELD HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_STEAM HID_THRUSTMASTER HID_ZEROPLUS I2C_MUX IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IOMMUFD IP_SCTP IRQ_REMAP KVM KVM_INTEL L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_COMMON_OPTIONS MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MFD_VIPERBOARD MMC MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_FLOW_TABLE NF_FLOW_TABLE_INET NF_NAT_AMANDA NF_NAT_H323 NF_NAT_OVS NF_NAT_PPTP NF_NAT_REDIRECT NF_NAT_SNMP_BASIC NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_ARP NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NINTENDO_FF NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NLS_UCS2_UTILS NOP_USB_XCEIV NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NTFS_FS NTFS_RW NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN NVIDIA_SHIELD_FF NVME_CORE NVME_FABRICS NVME_FC NVME_MULTIPATH NVME_RDMA NVME_TARGET NVME_TARGET_FC NVME_TARGET_FCLOOP NVME_TARGET_LOOP NVME_TARGET_RDMA NVME_TARGET_TCP NVME_TCP N_GSM N_HDLC OCFS2_DEBUG_FS OCFS2_FS OCFS2_FS_O2CB OCFS2_FS_STATS OCFS2_FS_USERSPACE_CLUSTER OF_GPIO OF_PMEM OMFS_FS OPENVSWITCH OPENVSWITCH_GENEVE OPENVSWITCH_GRE OPENVSWITCH_VXLAN ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_DEBUG OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PADATA PAGE_IDLE_FLAG PAGE_POOL PAGE_REPORTING PAHOLE_HAS_BTF_TAG PAHOLE_HAS_LANG_EXCLUDE PAHOLE_HAS_SPLIT_BTF PARPORT PARPORT_NOT_PC PARTITION_ADVANCED PCCARD PCCARD_NONSTATIC PCIEAER PCI_ENDPOINT PCI_IOV PCMCIA PCMCIA_LOAD_CIS PERCPU_STATS PERSISTENT_KEYRINGS PHONET PHYLINK PHY_CPCAP_USB PHY_QCOM_USB_HS PHY_QCOM_USB_HSIC PHY_SAMSUNG_USB2 PHY_TUSB1210 PKCS7_TEST_KEY PKCS8_PRIVATE_KEY_PARSER PLAYSTATION_FF PLFXLC PMIC_OPREGION PM_CLK PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOE_HASH_BITS_4 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PRISM2_USB PROC_CHILDREN PSI PSTORE PSTORE_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN R8712U RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_SI470X RADIO_SI4713 RADIO_TEA575X RAID6_PQ RAID_ATTRS RC_ATI_REMOTE RC_CORE RC_DEVICES RC_XBOX_DVD RDMA_RXE RDMA_SIW RDS RDS_RDMA RDS_TCP READ_ONLY_THP_FOR_FS REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGULATOR REGULATOR_FIXED_VOLTAGE REGULATOR_TWL4030 REISERFS_FS REISERFS_FS_POSIX_ACL REISERFS_FS_SECURITY REISERFS_FS_XATTR REISERFS_PROC_INFO RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE SCREEN_INFO SCSI_FC_ATTRS SCSI_HPSA SCSI_ISCSI_ATTRS SCSI_LOGGING SCSI_NETLINK SCSI_SAS_ATA SCSI_SAS_ATTRS SCSI_SAS_LIBSAS SCSI_SCAN_ASYNC SCSI_SRP_ATTRS SCTP_COOKIE_HMAC_MD5 SCTP_COOKIE_HMAC_SHA1 SCTP_DEFAULT_COOKIE_HMAC_MD5 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SENSORS_AQUACOMPUTER_D5NEXT SENSORS_CORSAIR_CPRO SENSORS_CORSAIR_PSU SENSORS_NZXT_KRAKEN2 SENSORS_NZXT_SMART2 SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS SMB_SERVER SMC SMC_DIAG SMSC_PHY SMS_SDIO_DRV SMS_SIANO_DEBUGFS SMS_SIANO_MDTV SMS_SIANO_RC SMS_USB_DRV SND SND_ALOOP SND_BCD2000 SND_CTL_FAST_LOOKUP SND_CTL_LED SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_DYNAMIC_MINORS SND_HDA SND_HDA_CODEC_ANALOG SND_HDA_CODEC_CA0110 SND_HDA_CODEC_CA0132 SND_HDA_CODEC_CIRRUS SND_HDA_CODEC_CMEDIA SND_HDA_CODEC_CONEXANT SND_HDA_CODEC_HDMI SND_HDA_CODEC_REALTEK SND_HDA_CODEC_SI3054 SND_HDA_CODEC_SIGMATEL SND_HDA_CODEC_VIA SND_HDA_COMPONENT SND_HDA_CORE SND_HDA_GENERIC SND_HDA_GENERIC_LEDS SND_HDA_HWDEP SND_HDA_I915 SND_HDA_INPUT_BEEP SND_HDA_INTEL SND_HDA_PATCH_LOADER SND_HDA_RECONFIG SND_HRTIMER SND_HWDEP SND_INTEL_DSP_CONFIG SND_INTEL_NHLT SND_INTEL_SOUNDWIRE_ACPI SND_JACK SND_JACK_INPUT_DEV SND_MIXER_OSS SND_OSSEMUL SND_PCI SND_PCM SND_PCMCIA SND_PCM_OSS SND_PCM_OSS_PLUGINS SND_PCM_TIMER SND_PCM_XRUN_DEBUG SND_PROC_FS SND_RAWMIDI SND_SEQUENCER SND_SEQUENCER_OSS SND_SEQ_DEVICE SND_SEQ_DUMMY SND_SEQ_HRTIMER_DEFAULT SND_SEQ_MIDI SND_SEQ_MIDI_EVENT SND_SEQ_VIRMIDI SND_SUPPORT_OLD_API SND_TIMER SND_UMP SND_UMP_LEGACY_RAWMIDI SND_USB SND_USB_6FIRE SND_USB_AUDIO SND_USB_AUDIO_MIDI_V2 SND_USB_AUDIO_USE_MEDIA_CONTROLLER SND_USB_CAIAQ SND_USB_CAIAQ_INPUT SND_USB_HIFACE SND_USB_LINE6 SND_USB_POD SND_USB_PODHD SND_USB_TONEPORT SND_USB_UA101 SND_USB_US122L SND_USB_USX2Y SND_USB_VARIAX SND_VERBOSE_PROCFS SND_VIRMIDI SND_VIRTIO SND_VMASTER SND_X86 SOCK_VALIDATE_XMIT SOLARIS_X86_PARTITION SONY_FF SOUND SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_COMPILE_DECOMP_SINGLE SQUASHFS_DECOMP_SINGLE SQUASHFS_FILE_DIRECT SQUASHFS_LZ4 SQUASHFS_LZO SQUASHFS_XATTR SQUASHFS_XZ SQUASHFS_ZLIB SQUASHFS_ZSTD SSB SSB_PCIHOST_POSSIBLE SSB_PCMCIAHOST_POSSIBLE SSB_SDIOHOST_POSSIBLE STAGING STEAM_FF STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSFB SYSV68_PARTITION SYSV_FS TABLET_USB_ACECAD TABLET_USB_AIPTEK TABLET_USB_HANWANG TABLET_USB_KBTAB TABLET_USB_PEGASUS TAHVO_USB TAHVO_USB_HOST_BY_DEFAULT TAP TARGET_CORE TASKS_TRACE_RCU TCG_CRB TCG_TIS TCG_TIS_CORE TCG_TPM TCP_CONG_BBR TCP_CONG_BIC TCP_CONG_CDG TCP_CONG_DCTCP TCP_CONG_HSTCP TCP_CONG_HTCP TCP_CONG_HYBLA TCP_CONG_ILLINOIS TCP_CONG_LP TCP_CONG_NV TCP_CONG_SCALABLE TCP_CONG_VEGAS TCP_CONG_VENO TCP_CONG_WESTWOOD TCP_CONG_YEAH TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THERMAL_NETLINK THP_SWAP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE TMPFS_QUOTA TOOLS_SUPPORT_RELR TOUCHSCREEN_SUR40 TOUCHSCREEN_USB_3M TOUCHSCREEN_USB_COMPOSITE TOUCHSCREEN_USB_DMC_TSC10 TOUCHSCREEN_USB_E2I TOUCHSCREEN_USB_EASYTOUCH TOUCHSCREEN_USB_EGALAX TOUCHSCREEN_USB_ELO TOUCHSCREEN_USB_ETT_TC45USB TOUCHSCREEN_USB_ETURBO TOUCHSCREEN_USB_GENERAL_TOUCH TOUCHSCREEN_USB_GOTOP TOUCHSCREEN_USB_GUNZE TOUCHSCREEN_USB_IDEALTEK TOUCHSCREEN_USB_IRTOUCH TOUCHSCREEN_USB_ITM TOUCHSCREEN_USB_JASTEC TOUCHSCREEN_USB_NEXIO TOUCHSCREEN_USB_PANJIT TOUCHSCREEN_USB_ZYTRONIC TRANSPARENT_HUGEPAGE TRANSPARENT_HUGEPAGE_MADVISE TTPCI_EEPROM TTY_PRINTK TUN TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_ANX7411 TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_FSA4480 TYPEC_MUX_GPIO_SBU TYPEC_MUX_INTEL_PMC TYPEC_MUX_NB7VPQ904M TYPEC_NVIDIA_ALTMODE TYPEC_RT1711H TYPEC_RT1719 TYPEC_STUSB160X TYPEC_TCPCI TYPEC_TCPCI_MAXIM TYPEC_TCPCI_MT6370 TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI TYPEC_WCOVE TYPEC_WUSB3801 UBIFS_ATIME_SUPPORT UBIFS_FS UBIFS_FS_ADVANCED_COMPR UBIFS_FS_LZO UBIFS_FS_SECURITY UBIFS_FS_XATTR UBIFS_FS_ZLIB UBIFS_FS_ZSTD UCSI_ACPI UCSI_CCG UCSI_STM32G0 UDF_FS UDMABUF UFS_FS UFS_FS_WRITE UHID ULTRIX_PARTITION UNICODE UNIXWARE_DISKLABEL UNIX_DIAG USB4 USB4_NET USBIP_CORE USBIP_HOST USBIP_VHCI_HCD USBIP_VUDC USBPCWATCHDOG USB_ACM USB_ADUTUX USB_AIRSPY USB_ALI_M5632 USB_AMD5536UDC USB_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_ATM USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_CDNS2_UDC USB_CDNS3 USB_CDNS3_GADGET USB_CDNS3_HOST USB_CDNS3_PCI_WRAP 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_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_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_RNDIS_WLAN 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_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_REALTEK 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 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 VDPA_USER 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 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_CMDLINE 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_NOMODESET 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_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 VXLAN WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK X86_X2APIC XARRAY_MULTI 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 ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZONE_DEVICE ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZBUD] testing current HEAD f34f16e5c63232cfd9bfeb722e0878e209caa9ce testing commit f34f16e5c63232cfd9bfeb722e0878e209caa9ce gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e9b881aaad232d9f5f9b601f3a6f9f74af583b6ac8a895d305f181bec60eed29 all runs: OK false negative chance: 0.000 # git bisect start f34f16e5c63232cfd9bfeb722e0878e209caa9ce bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 Bisecting: 527 revisions left to test after this (roughly 9 steps) [dbfaa79103b4063a8f00ebe60701ed6fa9d46399] USB: storage: Ignore driver CD mode for Realtek multi-mode Wi-Fi dongles determine whether the revision contains the guilty commit revision bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 crashed and is reachable testing commit dbfaa79103b4063a8f00ebe60701ed6fa9d46399 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b2fd99135949cb9394629a3060f1b937dae1985c5ec67b83f9730e2629f39ec2 all runs: OK false negative chance: 0.000 # git bisect bad dbfaa79103b4063a8f00ebe60701ed6fa9d46399 Bisecting: 263 revisions left to test after this (roughly 8 steps) [6e3733fe88a0507648804894983ad64286238689] i3c: add missing include to internal header determine whether the revision contains the guilty commit revision bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 crashed and is reachable testing commit 6e3733fe88a0507648804894983ad64286238689 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 424862bc0bf40a48e08141c577439c118185f55828e5d44bcb757ed0594fb841 all runs: OK false negative chance: 0.000 # git bisect bad 6e3733fe88a0507648804894983ad64286238689 Bisecting: 131 revisions left to test after this (roughly 7 steps) [8c046583a2344defe0b6956bf7e535b270a1e03f] platform/x86: thinkpad_acpi: Handle KCOV __init vs inline mismatches determine whether the revision contains the guilty commit revision bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 crashed and is reachable testing commit 8c046583a2344defe0b6956bf7e535b270a1e03f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 47445c216f5c6543e5bd9332ce97419f0f8cd04be5ce8b110486b6242557bc7a run #0: crashed: INFO: rcu detected stall in futex run #1: crashed: INFO: rcu detected stall in irqentry_exit run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in corrupted run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: INFO: rcu detected stall in futex, types: [HANG] # git bisect good 8c046583a2344defe0b6956bf7e535b270a1e03f Bisecting: 65 revisions left to test after this (roughly 6 steps) [668280aa65fc85246a5cea83f59bcc3a5ed568bc] net: dsa: b53: fix b53_imp_vlan_setup for BCM5325 determine whether the revision contains the guilty commit revision bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 crashed and is reachable testing commit 668280aa65fc85246a5cea83f59bcc3a5ed568bc gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 193007a907f22d8cda2771fedc4c0f901e900eefe14a8675851d0b4f2c064b8d run #0: crashed: INFO: rcu detected stall in futex run #1: crashed: INFO: rcu detected stall in futex run #2: crashed: INFO: rcu detected stall in sys_bpf run #3: crashed: INFO: rcu detected stall in perf_event_open run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in futex run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in futex run #9: crashed: INFO: rcu detected stall in corrupted run #10: crashed: INFO: rcu detected stall in futex run #11: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #12: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor3949516842" "root@10.128.0.145:./syz-executor3949516842"]: exit status 255 run #13: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2540733913" "root@10.128.1.77:./syz-executor2540733913"]: exit status 255 run #14: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2450523941" "root@10.128.10.55:./syz-executor2450523941"]: exit status 255 run #15: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor3759963370" "root@10.128.1.96:./syz-executor3759963370"]: exit status 255 run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in futex, types: [HANG] # git bisect good 668280aa65fc85246a5cea83f59bcc3a5ed568bc Bisecting: 32 revisions left to test after this (roughly 5 steps) [16e245176777f160ae028df93f4ff3cb372678a1] hwmon: (emc2305) Set initial PWM minimum value during probe based on thermal state determine whether the revision contains the guilty commit revision bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 crashed and is reachable testing commit 16e245176777f160ae028df93f4ff3cb372678a1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0d26a11bc9955b19da7d6777089182f12c1dc357647193d0145a7f2a599737f9 all runs: OK false negative chance: 0.000 # git bisect bad 16e245176777f160ae028df93f4ff3cb372678a1 Bisecting: 16 revisions left to test after this (roughly 4 steps) [e7a375453cca2b8a0d2fa1b82b913f3fed7c0507] rcu: Fix rcu_read_unlock() deadloop due to IRQ work determine whether the revision contains the guilty commit revision 8c046583a2344defe0b6956bf7e535b270a1e03f crashed and is reachable testing commit e7a375453cca2b8a0d2fa1b82b913f3fed7c0507 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ffc2df7af9c21ca20af07b4da495aeb929f79237111560c6f8119f45f0886b28 all runs: OK false negative chance: 0.000 # git bisect bad e7a375453cca2b8a0d2fa1b82b913f3fed7c0507 Bisecting: 7 revisions left to test after this (roughly 3 steps) [1df5e6eb71e47b12d74d5a9105bce467b31ec29e] net: ncsi: Fix buffer overflow in fetching version id determine whether the revision contains the guilty commit revision 8c046583a2344defe0b6956bf7e535b270a1e03f crashed and is reachable testing commit 1df5e6eb71e47b12d74d5a9105bce467b31ec29e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1505d1226274231c52cfc59c50e21220e91dc80f010397dc7c0604743453cd88 run #0: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in futex run #4: crashed: INFO: rcu detected stall in smp_call_function run #5: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in futex run #8: crashed: INFO: rcu detected stall in perf_event_open run #9: crashed: INFO: rcu detected stall in smp_call_function run #10: crashed: INFO: rcu detected stall in irqentry_exit run #11: crashed: INFO: rcu detected stall in futex run #12: crashed: INFO: rcu detected stall in futex run #13: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor1875510212" "root@10.128.0.13:./syz-executor1875510212"]: exit status 255 run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in syscall_enter_from_user_mode, types: [HANG] # git bisect good 1df5e6eb71e47b12d74d5a9105bce467b31ec29e Bisecting: 3 revisions left to test after this (roughly 2 steps) [c03a532fe1d3b5b1ae2f49025382fd4c5d15fd01] bpf: Make reg_not_null() true for CONST_PTR_TO_MAP determine whether the revision contains the guilty commit revision 668280aa65fc85246a5cea83f59bcc3a5ed568bc crashed and is reachable testing commit c03a532fe1d3b5b1ae2f49025382fd4c5d15fd01 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 00ee41898bb75fbc92dbeef926388233da0e00e1abaaa764bb863eedc033dfa9 run #0: crashed: INFO: rcu detected stall in perf_event_open run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted 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 futex run #6: crashed: INFO: rcu detected stall in futex run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in futex run #9: crashed: INFO: rcu detected stall in smp_call_function 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: INFO: rcu detected stall in perf_event_open, types: [HANG] # git bisect good c03a532fe1d3b5b1ae2f49025382fd4c5d15fd01 Bisecting: 1 revision left to test after this (roughly 1 step) [39de3ce65635531d2c3ae5d542630840c55dfb22] drm/amd/display: Avoid trying AUX transactions on disconnected ports determine whether the revision contains the guilty commit revision bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 crashed and is reachable testing commit 39de3ce65635531d2c3ae5d542630840c55dfb22 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9f4e07a04d48ac703cb562132e9fe92c83cab01bf78a2abc3f9d7233d7953dca run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in sys_bpf run #4: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor4079170229" "root@10.128.0.180:./syz-executor4079170229"]: exit status 255 run #5: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor3868700910" "root@10.128.0.53:./syz-executor3868700910"]: exit status 255 run #6: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor930224463" "root@10.128.10.5:./syz-executor930224463"]: exit status 255 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: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 39de3ce65635531d2c3ae5d542630840c55dfb22 Bisecting: 0 revisions left to test after this (roughly 0 steps) [58ed3ac8538c2504aae8f98e43fbcd54900c0874] drm/ttm: Respect the shrinker core free target determine whether the revision contains the guilty commit revision 668280aa65fc85246a5cea83f59bcc3a5ed568bc crashed and is reachable testing commit 58ed3ac8538c2504aae8f98e43fbcd54900c0874 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8cf0c2a07cfc3273debcce015d25c71fe991ad0c3d6aabc9b1988b47fec2ea46 run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in syscall_enter_from_user_mode run #2: crashed: INFO: rcu detected stall in futex run #3: crashed: INFO: rcu detected stall in smp_call_function run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in futex run #6: crashed: INFO: rcu detected stall in futex run #7: crashed: INFO: rcu detected stall in smp_call_function run #8: crashed: INFO: rcu detected stall in corrupted run #9: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor1012371691" "root@10.128.10.24:./syz-executor1012371691"]: exit status 255 run #10: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2520668429" "root@10.128.10.15:./syz-executor2520668429"]: exit status 255 run #11: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor238350634" "root@10.128.0.191:./syz-executor238350634"]: exit status 255 run #12: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2214292344" "root@10.128.10.16:./syz-executor2214292344"]: exit status 255 run #13: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor664953029" "root@10.128.10.22:./syz-executor664953029"]: exit status 255 run #14: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor4221504277" "root@10.128.10.37:./syz-executor4221504277"]: exit status 255 run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: rcu detected stall in corrupted, types: [HANG] # git bisect good 58ed3ac8538c2504aae8f98e43fbcd54900c0874 e7a375453cca2b8a0d2fa1b82b913f3fed7c0507 is the first bad commit commit e7a375453cca2b8a0d2fa1b82b913f3fed7c0507 Author: Joel Fernandes Date: Tue Jul 8 10:22:19 2025 -0400 rcu: Fix rcu_read_unlock() deadloop due to IRQ work [ Upstream commit b41642c87716bbd09797b1e4ea7d904f06c39b7b ] During rcu_read_unlock_special(), if this happens during irq_exit(), we can lockup if an IPI is issued. This is because the IPI itself triggers the irq_exit() path causing a recursive lock up. This is precisely what Xiongfeng found when invoking a BPF program on the trace_tick_stop() tracepoint As shown in the trace below. Fix by managing the irq_work state correctly. irq_exit() __irq_exit_rcu() /* in_hardirq() returns false after this */ preempt_count_sub(HARDIRQ_OFFSET) tick_irq_exit() tick_nohz_irq_exit() tick_nohz_stop_sched_tick() trace_tick_stop() /* a bpf prog is hooked on this trace point */ __bpf_trace_tick_stop() bpf_trace_run2() rcu_read_unlock_special() /* will send a IPI to itself */ irq_work_queue_on(&rdp->defer_qs_iw, rdp->cpu); A simple reproducer can also be obtained by doing the following in tick_irq_exit(). It will hang on boot without the patch: static inline void tick_irq_exit(void) { + rcu_read_lock(); + WRITE_ONCE(current->rcu_read_unlock_special.b.need_qs, true); + rcu_read_unlock(); + Reported-by: Xiongfeng Wang Closes: https://lore.kernel.org/all/9acd5f9f-6732-7701-6880-4b51190aa070@huawei.com/ Tested-by: Qi Xi Signed-off-by: Joel Fernandes Reviewed-by: "Paul E. McKenney" Reported-by: Linux Kernel Functional Testing [neeraj: Apply Frederic's suggested fix for PREEMPT_RT] Signed-off-by: Neeraj Upadhyay (AMD) Signed-off-by: Sasha Levin kernel/rcu/tree.h | 13 ++++++++++++- kernel/rcu/tree_plugin.h | 37 ++++++++++++++++++++++++++----------- 2 files changed, 38 insertions(+), 12 deletions(-) accumulated error probability: 0.00 culprit signature: ffc2df7af9c21ca20af07b4da495aeb929f79237111560c6f8119f45f0886b28 parent signature: 8cf0c2a07cfc3273debcce015d25c71fe991ad0c3d6aabc9b1988b47fec2ea46 reproducer is flaky (0.39 repro chance estimate) revisions tested: 17, total time: 5h10m17.450672479s (build: 1h24m22.459565638s, test: 3h38m27.737079421s) first good commit: e7a375453cca2b8a0d2fa1b82b913f3fed7c0507 rcu: Fix rcu_read_unlock() deadloop due to IRQ work recipients (to): ["joelagnelf@nvidia.com" "neeraj.upadhyay@kernel.org" "paulmck@kernel.org" "sashal@kernel.org" "xiqi2@huawei.com"] recipients (cc): []