ci2 starts bisection 2026-01-14 07:49:43.097375394 +0000 UTC m=+4213195.274498471 bisecting fixing commit since 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba building syzkaller on d6526ea3e6ad9081c902859bbb80f9f840377cb4 ensuring issue is reproducible on original commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0c1d3fb1537a39b6883abdebeb4d9474077f15ca9ecb141ddf86a01f32a144b0 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: crashed: INFO: task hung in flush_old_commits run #7: crashed: INFO: task hung in reiserfs_readdir_inode run #8: crashed: INFO: task hung in reiserfs_readdir_inode run #9: crashed: INFO: task hung in flush_old_commits run #10: crashed: INFO: task hung in reiserfs_readdir_inode run #11: crashed: INFO: task hung in flush_old_commits run #12: crashed: INFO: task hung in flush_old_commits run #13: crashed: INFO: task hung in reiserfs_readdir_inode run #14: crashed: INFO: task hung in flush_old_commits run #15: crashed: INFO: task hung in flush_old_commits run #16: crashed: INFO: task hung in flush_old_commits run #17: crashed: INFO: task hung in flush_old_commits run #18: crashed: INFO: task hung in flush_old_commits run #19: crashed: INFO: task hung in flush_old_commits representative crash: INFO: task hung in flush_old_commits, 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 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ef5276159fb663db5a91d723acd58cf8ea83ac6c3e0f2ba9d5c59f7280204d2c run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: INFO: task hung in reiserfs_readdir_inode run #2: crashed: INFO: task hung in reiserfs_readdir_inode run #3: crashed: INFO: task hung in flush_old_commits run #4: crashed: INFO: task hung in flush_old_commits run #5: crashed: INFO: task hung in flush_old_commits run #6: crashed: INFO: task hung in flush_old_commits run #7: crashed: INFO: task hung in flush_old_commits run #8: crashed: INFO: task hung in flush_old_commits run #9: crashed: INFO: task hung in flush_old_commits representative crash: INFO: task hung in reiserfs_readdir_inode, types: [HANG] the bug reproduces without the instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed kconfig minimization: base=3829 full=7618 leaves diff=2128 split chunks (needed=false): <2128> split chunk #0 of len 2128 into 5 parts testing without sub-chunk 1/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ec31e02a2c2be3b95fe8a9cf3c3c9aee1c98e548ff95dd2d6c4345e5b6abef36 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: INFO: task hung in flush_old_commits run #2: crashed: INFO: task hung in reiserfs_readdir_inode run #3: crashed: INFO: task hung in reiserfs_readdir_inode run #4: crashed: INFO: task hung in reiserfs_readdir_inode run #5: crashed: INFO: task hung in flush_old_commits run #6: crashed: INFO: task hung in flush_old_commits run #7: crashed: INFO: task hung in flush_old_commits run #8: crashed: INFO: task hung in flush_old_commits run #9: crashed: INFO: task hung in flush_old_commits representative crash: INFO: task hung in flush_old_commits, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bd052011a638aa4ae5248a63823b8688c0b22de9598672ee2cb121caff4f2acc run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: INFO: task hung in flush_old_commits run #4: crashed: INFO: task hung in reiserfs_readdir_inode run #5: crashed: INFO: task hung in reiserfs_readdir_inode run #6: crashed: INFO: task hung in flush_old_commits run #7: crashed: INFO: task hung in reiserfs_readdir_inode run #8: crashed: INFO: task hung in flush_old_commits run #9: crashed: INFO: task hung in flush_old_commits representative crash: INFO: task hung in flush_old_commits, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fd3a559b615fd9e256cef9a5b107994e3cdc2788b98899b9a9370a0edab6871a all runs: crashed: INFO: task hung in flush_old_commits representative crash: INFO: task hung in flush_old_commits, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bba88bb059e9353261e2d6eb63e4dc00e89fe63e1506e81f1685e6715d6eea09 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 18aff628edc60493e9c224e0698e69a1746adf6efe6fa84ccf2ff61ed4454345 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: INFO: task hung in flush_old_commits run #2: crashed: INFO: task hung in flush_old_commits run #3: crashed: INFO: task hung in flush_old_commits run #4: crashed: INFO: task hung in flush_old_commits run #5: crashed: INFO: task hung in flush_old_commits run #6: crashed: INFO: task hung in flush_old_commits run #7: crashed: INFO: task hung in flush_old_commits run #8: crashed: INFO: task hung in flush_old_commits run #9: crashed: INFO: task hung in flush_old_commits representative crash: INFO: task hung in flush_old_commits, types: [HANG] the chunk can be dropped minimized to 426 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BXT_WC_PMIC_OPREGION CFG80211 CMA DAX DLM DRM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_THRUSTMASTER IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IP_SCTP L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MMC MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_DUP_NETDEV NF_FLOW_TABLE NF_FLOW_TABLE_INET NF_NAT_AMANDA NF_NAT_H323 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_TABLES_NETDEV 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 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 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_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 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PRISM2_USB PROC_CHILDREN PROC_MEM_ALWAYS_FORCE PSI PSTORE PSTORE_842_COMPRESS PSTORE_COMPRESS PSTORE_DEFLATE_COMPRESS PSTORE_DEFLATE_COMPRESS_DEFAULT PSTORE_LZ4HC_COMPRESS PSTORE_LZ4_COMPRESS PSTORE_LZO_COMPRESS PSTORE_ZSTD_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 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 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_USB SND_USB_6FIRE SND_USB_AUDIO 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_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 STAGING_MEDIA 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 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 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_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_ANX7411 TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_FSA4480 TYPEC_MUX_INTEL_PMC 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_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_DWC2 USB_GADGET USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VXLAN WIRELESS WLAN WLAN_VENDOR_PURELIFI ZONE_DEVICE] disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed testing current HEAD bec0e10ee67efbd0ad36281745a3edea4fcd8dc2 testing commit bec0e10ee67efbd0ad36281745a3edea4fcd8dc2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2bd471d8315bec66efe924038bd67baf9d8b7daa4ab7db44f74617b5ab40ddc2 run #0: crashed: INFO: task hung in flush_old_commits run #1: crashed: INFO: task hung in flush_old_commits run #2: crashed: INFO: task hung in flush_old_commits run #3: crashed: INFO: task hung in reiserfs_readdir_inode run #4: crashed: INFO: task hung in flush_old_commits run #5: crashed: INFO: task hung in flush_old_commits run #6: crashed: INFO: task hung in flush_old_commits run #7: crashed: INFO: task hung in flush_old_commits run #8: crashed: INFO: task hung in flush_old_commits run #9: crashed: INFO: task hung in flush_old_commits representative crash: INFO: task hung in flush_old_commits, types: [HANG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 2h11m58.881605401s (build: 34m27.533676541s, test: 1h20m11.043742397s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.160 crash: INFO: task hung in flush_old_commits INFO: task kworker/0:6:1283 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:6 state:D stack:13616 pid:1283 ppid:2 flags:0x00004000 Workqueue: events_long flush_old_commits Call Trace: context_switch kernel/sched/core.c:5245 [inline] __schedule+0x589/0x10a0 kernel/sched/core.c:6562 schedule+0x50/0xb0 kernel/sched/core.c:6638 schedule_preempt_disabled+0x2e/0x40 kernel/sched/core.c:6697 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x44c/0x9b0 kernel/locking/mutex.c:747 reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 reiserfs_sync_fs fs/reiserfs/super.c:76 [inline] flush_old_commits+0xbf/0x160 fs/reiserfs/super.c:111 process_one_work+0x27d/0x4c0 kernel/workqueue.c:2292 worker_thread+0x236/0x3a0 kernel/workqueue.c:2439 kthread+0xcc/0xe0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task syz-executor:2657 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:12080 pid:2657 ppid:1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5245 [inline] __schedule+0x589/0x10a0 kernel/sched/core.c:6562 schedule+0x50/0xb0 kernel/sched/core.c:6638 schedule_preempt_disabled+0x2e/0x40 kernel/sched/core.c:6697 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x44c/0x9b0 kernel/locking/mutex.c:747 reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 reiserfs_readdir_inode+0x20b/0x6b0 fs/reiserfs/dir.c:79 iterate_dir+0xa6/0x180 fs/readdir.c:-1 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0x64/0xf0 fs/readdir.c:354 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f93253c20b3 RSP: 002b:00007fffd0c43bb8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 000055557bf014e0 RCX: 00007f93253c20b3 RDX: 0000000000008000 RSI: 000055557bf014e0 RDI: 0000000000000005 RBP: 000055557bf014b4 R08: 0000000000028b61 R09: 0000000000000000 R10: 00007f93255bacc0 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000010 R14: 000055557bf014b0 R15: 00007fffd0c45e70 Showing all locks held in the system: 4 locks held by kworker/0:0/7: #0: ffff888100062938 ( (wq_completion)events_long ){....}-{0:0} , at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 #1: ffffc9000008be68 ((work_completion)(&(&sbi->old_work)->work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 #2: ffff888142e6f0e0 (&type->s_umount_key#44){....}-{3:3}, at: flush_old_commits+0x37/0x160 fs/reiserfs/super.c:97 #3: ffff888105fe1890 (&sbi->lock){....}-{3:3}, at: reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 1 lock held by rcu_tasks_kthre/12: #0: ffffffff83572068 (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_one_gp kernel/rcu/tasks.h:517 [inline] (rcu_tasks.tasks_gp_mutex){....}-{3:3}, at: rcu_tasks_kthread+0x97/0x4c0 kernel/rcu/tasks.h:562 1 lock held by khungtaskd/27: #0: ffffffff83571e28 ( rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2a/0xf0 kernel/locking/lockdep.c:6513 2 locks held by getty/1146: #0: ffff888101fa5098 ( &tty->ldisc_sem ){....}-{0:0} , at: tty_ldisc_ref_wait+0x1c/0x40 drivers/tty/tty_ldisc.c:244 #1: ffffc90000bfb2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x19e/0x6d0 drivers/tty/n_tty.c:2198 4 locks held by kworker/0:3/1219: #0: ffff888100062938 ((wq_completion)events_long){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 #1: ffffc90001ed3e68 ((work_completion)(&(&sbi->old_work)->work)){....}-{0:0} , at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 #2: ffff888100d770e0 (&type->s_umount_key #44 ){....}-{3:3} , at: flush_old_commits+0x37/0x160 fs/reiserfs/super.c:97 #3: ffff88811c729090 (&sbi->lock){....}-{3:3}, at: reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 4 locks held by kworker/0:6/1283: #0: ffff888100062938 ((wq_completion)events_long){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 #1: ffffc90001ff3e68 ((work_completion)(&(&sbi->old_work)->work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 #2: ffff888100d720e0 (&type->s_umount_key#44){....}-{3:3}, at: flush_old_commits+0x37/0x160 fs/reiserfs/super.c:97 #3: ffff888112288890 (&sbi->lock){....}-{3:3}, at: reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 4 locks held by kworker/1:8/2649: #0: ffff888100062938 ((wq_completion)events_long){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 #1: ffffc90001f13e68 ( (work_completion)(&(&sbi->old_work)->work) ){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 #2: ffff8881452520e0 (&type->s_umount_key#44){....}-{3:3}, at: flush_old_commits+0x37/0x160 fs/reiserfs/super.c:97 #3: ffff88811228a090 (&sbi->lock){....}-{3:3}, at: reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 2 locks held by kworker/1:10/2652: #0: ffff888100063138 ( (wq_completion)rcu_gp ){....}-{0:0} , at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 #1: ffffc90001f2be68 ((work_completion)(&rew->rew_work)){....}-{0:0}, at: process_one_work+0x223/0x4c0 kernel/workqueue.c:2267 3 locks held by syz-executor/2657: #0: ffff888103e6aae8 ( &f->f_pos_lock){....}-{3:3}, at: __fdget_pos+0xa8/0xc0 fs/file.c:1038 #1: ffff88810f5302e0 (&type->i_mutex_dir_key #8 ){....}-{3:3} , at: iterate_dir+0x40/0x180 fs/readdir.c:55 #2: ffff888112288890 (&sbi->lock){....}-{3:3}, at: reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 3 locks held by syz.3.17/3071: 3 locks held by syz-executor/3073: #0: ffff888100ed42e8 (&f->f_pos_lock){....}-{3:3}, at: __fdget_pos+0xa8/0xc0 fs/file.c:1038 #1: ffff88810f530f10 ( &type->i_mutex_dir_key #8 ){....}-{3:3}, at: iterate_dir+0x40/0x180 fs/readdir.c:55 #2: ffff88811228a090 (&sbi->lock){....}-{3:3}, at: reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 3 locks held by syz.4.19/3488: 3 locks held by syz-executor/3907: #0: ffff888101f272e8 ( &f->f_pos_lock){....}-{3:3}, at: __fdget_pos+0xa8/0xc0 fs/file.c:1038 #1: ffff88810f531b40 (&type->i_mutex_dir_key#8){....}-{3:3}, at: iterate_dir+0x40/0x180 fs/readdir.c:55 #2: ffff888105fe1890 (&sbi->lock){....}-{3:3}, at: reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 3 locks held by syz.6.25/4322: 3 locks held by syz-executor/4324: #0: ffff88810834fce8 (&f->f_pos_lock){....}-{3:3}, at: __fdget_pos+0xa8/0xc0 fs/file.c:1038 #1: ffff88810f5b9b40 (&type->i_mutex_dir_key#8){....}-{3:3}, at: iterate_dir+0x40/0x180 fs/readdir.c:55 #2: ffff88811c729090 (&sbi->lock){....}-{3:3}, at: reiserfs_write_lock+0x26/0x40 fs/reiserfs/lock.c:27 5 locks held by syz.7.26/4739: 1 lock held by syz-executor/4741: #0: ffffffff83572e78 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #0: ffffffff83572e78 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x298/0x750 kernel/rcu/tree_exp.h:962 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x74/0xbb lib/dump_stack.c:106 nmi_cpu_backtrace+0x102/0x160 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0xa5/0x160 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0x533/0x560 kernel/hung_task.c:377 kthread+0xcc/0xe0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4739 Comm: syz.7.26 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:io_serial_in+0xf/0x20 drivers/tty/serial/8250/8250_port.c:461 Code: 00 00 d3 e6 48 63 f6 48 03 77 48 89 d7 e9 f9 7a e8 ff 66 0f 1f 84 00 00 00 00 00 89 f2 0f b6 8f f1 00 00 00 d3 e2 03 57 40 ec <0f> b6 c0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f b6 8f f1 00 RSP: 0018:ffffc90004c27148 EFLAGS: 00000006 RAX: 0000000000000005 RBX: ffffffff8814f440 RCX: 0000000000000000 RDX: 00000000000003f9 RSI: 0000000000000001 RDI: ffffffff8814f440 RBP: ffffffff87f74b80 R08: 0000000000000000 R09: 0000000000000005 R10: 0000000052455349 R11: 0000000053494552 R12: 000000000000009e R13: ffffc90004c27317 R14: ffffffff8364ae30 R15: 0000000000000000 FS: 00007f0831d046c0(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f855dafb000 CR3: 000000011dccf000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_port_in include/linux/serial_core.h:668 [inline] serial8250_console_write+0xb6/0x630 drivers/tty/serial/8250/8250_port.c:3437 call_console_driver kernel/printk/printk.c:1977 [inline] console_emit_next_record+0x43b/0x550 kernel/printk/printk.c:2777 console_flush_all kernel/printk/printk.c:-1 [inline] console_unlock+0x14e/0x280 kernel/printk/printk.c:2906 vprintk_emit+0xe0/0x3a0 kernel/printk/printk.c:2303 _printk+0x54/0x70 kernel/printk/printk.c:2328 __reiserfs_warning+0xd4/0x100 fs/reiserfs/prints.c:290 reiserfs_read_bitmap_block+0x159/0x180 fs/reiserfs/bitmap.c:1434 scan_bitmap_block+0x74/0x380 fs/reiserfs/bitmap.c:164 scan_bitmap fs/reiserfs/bitmap.c:402 [inline] allocate_without_wrapping_disk fs/reiserfs/bitmap.c:1161 [inline] blocknrs_and_prealloc_arrays_from_search_start fs/reiserfs/bitmap.c:1274 [inline] reiserfs_allocate_blocknrs+0x66b/0xea0 fs/reiserfs/bitmap.c:1375 _allocate_block fs/reiserfs/inode.c:-1 [inline] reiserfs_get_block+0xad2/0x12a0 fs/reiserfs/inode.c:756 __block_write_begin_int+0x186/0x6a0 fs/buffer.c:1991 reiserfs_write_begin+0x109/0x220 fs/reiserfs/inode.c:2775 generic_perform_write+0xa0/0x220 mm/filemap.c:3862 __generic_file_write_iter+0x6f/0xb0 mm/filemap.c:3960 generic_file_write_iter+0x43/0xb0 mm/filemap.c:3989 __kernel_write_iter+0xc2/0x1b0 fs/read_write.c:517 __kernel_write+0x8c/0xb0 fs/read_write.c:537 __dump_emit fs/coredump.c:873 [inline] dump_emit+0x91/0xf0 fs/coredump.c:910 elf_core_dump+0xd74/0x1130 fs/binfmt_elf.c:2306 do_coredump+0xa02/0xde0 fs/coredump.c:824 get_signal+0x603/0x750 kernel/signal.c:2857 arch_do_signal_or_restart+0x92/0x630 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x6b/0xd0 kernel/entry/common.c:174 exit_to_user_mode_prepare+0x91/0xd0 kernel/entry/common.c:210 irqentry_exit_to_user_mode+0x5/0x20 kernel/entry/common.c:316 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608 RIP: 0033:0x7f0830d8f751 Code: 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:fffffffffffffe80 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f0830fe5fa0 RCX: 00007f0830d8f749 RDX: 0000000000000000 RSI: fffffffffffffe80 RDI: 0000000000008000 RBP: 00007f0830e13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f0830fe6038 R14: 00007f0830fe5fa0 R15: 00007fff7771fad8