ci starts bisection 2026-01-15 04:28:25.514013401 +0000 UTC m=+4292895.039499544 bisecting fixing commit since f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e building syzkaller on f93b2b552ce5fe589b450ff74ca1b459cdbc71a8 ensuring issue is reproducible on original commit f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e testing commit f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 22c153521ee6b4f8291840b9948704b7094574ae5d0dd9b29f7ed33c61a429b1 run #0: crashed: INFO: task hung in rmap_walk_file run #1: crashed: INFO: task hung in rmap_walk_file run #2: crashed: INFO: task hung in rmap_walk_file run #3: crashed: INFO: task hung in rmap_walk_file run #4: crashed: INFO: task hung in rmap_walk_file run #5: crashed: INFO: task hung in rmap_walk_file run #6: crashed: INFO: task hung in rmap_walk_file run #7: crashed: INFO: task hung in rmap_walk_file run #8: crashed: INFO: task hung in rmap_walk_file run #9: crashed: INFO: task hung in rmap_walk_file run #10: crashed: INFO: task hung in rmap_walk_file run #11: crashed: INFO: task hung in rmap_walk_file run #12: crashed: INFO: task hung in rmap_walk_file run #13: crashed: INFO: task hung in rmap_walk_file run #14: crashed: INFO: task hung in rmap_walk_file run #15: crashed: INFO: task hung in rmap_walk_file run #16: crashed: INFO: task hung in rmap_walk_file run #17: crashed: INFO: task hung in rmap_walk_file run #18: crashed: INFO: task hung in rmap_walk_file run #19: OK representative crash: INFO: task hung in rmap_walk_file, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed testing commit f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 27001a6e9694c1ea32d74df6f16d46565502c215c5e075ba92b412688eedc141 all runs: crashed: INFO: task hung in rmap_walk_file representative crash: INFO: task hung in rmap_walk_file, types: [HANG] the bug reproduces without the instrumentation disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed kconfig minimization: base=4116 full=8243 leaves diff=2163 split chunks (needed=false): <2163> split chunk #0 of len 2163 into 5 parts testing without sub-chunk 1/5 disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed testing commit f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 508e26ae278023cef924821445fc200d41cf07f67e3225b57392f8294588c370 all runs: crashed: INFO: task hung in rmap_walk_file representative crash: INFO: task hung in rmap_walk_file, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed testing commit f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7daba53b2c262d83f6ea6d07228942e6deb8975c3eae63a062241e81345afb96 run #0: crashed: INFO: task hung in rmap_walk_file run #1: crashed: INFO: task hung in rmap_walk_file run #2: crashed: INFO: task hung in rmap_walk_file run #3: crashed: INFO: task hung in rmap_walk_file run #4: crashed: INFO: task hung in rmap_walk_file run #5: crashed: INFO: task hung in rmap_walk_file run #6: crashed: INFO: task hung in rmap_walk_file run #7: crashed: INFO: task hung in rmap_walk_file run #8: crashed: INFO: task hung in rmap_walk_file run #9: OK representative crash: INFO: task hung in rmap_walk_file, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed testing commit f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2f963dc93b88375f44bdc9208838c25374a41b609205f351dd8c45f71b0f5417 run #0: ignore: lost connection to test machine run #1: crashed: INFO: task hung in rmap_walk_file run #2: crashed: INFO: task hung in rmap_walk_file run #3: crashed: INFO: task hung in rmap_walk_file run #4: crashed: INFO: task hung in rmap_walk_file run #5: crashed: INFO: task hung in rmap_walk_file run #6: OK run #7: OK run #8: OK run #9: OK representative crash: INFO: task hung in rmap_walk_file, 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 f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7ce575ae1214c45d825c58a38012c8d473964c00291a1d3eb02254e4e621d5c6 run #0: crashed: INFO: task hung in rmap_walk_file run #1: crashed: INFO: task hung in rmap_walk_file run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: INFO: task hung in rmap_walk_file, types: [HANG] testing without sub-chunk 5/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed testing commit f44d154d6e3d633d4c49a5d6aed8a0e4684ae25e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3d22b1adbff2204f7ae191c91300c21751cb5ce0517c49b90885b389e8cafada run #0: crashed: INFO: task hung in rmap_walk_file run #1: crashed: INFO: task hung in rmap_walk_file run #2: crashed: INFO: task hung in rmap_walk_file run #3: crashed: INFO: task hung in rmap_walk_file run #4: crashed: INFO: task hung in rmap_walk_file run #5: crashed: INFO: task hung in rmap_walk_file run #6: crashed: INFO: task hung in rmap_walk_file run #7: crashed: INFO: task hung in rmap_walk_file run #8: crashed: INFO: task hung in rmap_walk_file run #9: crashed: INFO: task hung in rmap_walk_file run #10: crashed: INFO: task hung in rmap_walk_file run #11: crashed: INFO: task hung in rmap_walk_file run #12: ignore: lost connection to test machine run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in rmap_walk_file, types: [HANG] the chunk can be dropped minimized to 433 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_HAS_PTE_DEVMAP ATM AX25 BT BT_BREDR BT_HIDP BXT_WC_PMIC_OPREGION CFG80211 CMA CRYPTO_CTS DAX DLM DRM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO HID_NVIDIA_SHIELD HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_STEAM 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 MCORE2 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_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_SOCKET_IPV6 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 NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS 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 PAGE_IDLE_FLAG 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_1 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PROC_CHILDREN PROC_PID_CPUSET PSAMPLE PSI PSTORE PSTORE_COMPRESS PTDUMP_CORE 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 REGMAP_SPI REGULATOR REGULATOR_FIXED_VOLTAGE REGULATOR_TWL4030 RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 RMI4_F3A ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RPCSEC_GSS_KRB5_ENCTYPES_AES_SHA1 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_GIGABYTE_WATERFORCE SENSORS_NZXT_KRAKEN2 SENSORS_NZXT_SMART2 SENSORS_POWERZ SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SKB_DECRYPTED 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_HDA_SCODEC_COMPONENT 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_UMP_CLIENT SND_SEQ_VIRMIDI SND_SOC SND_SOC_I2C_AND_SPI SND_SOC_SDCA_OPTIONAL 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 SOUNDWIRE SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_LJCA SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_COMPILE_DECOMP_MULTI SQUASHFS_DECOMP_MULTI 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 STEAM_FF STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSFB SYSFS_SYSCALL 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 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 TEE TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THERMAL_GOV_USER_SPACE 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_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_MUX_PTN36502 TYPEC_MUX_WCD939X_USBSS 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_LJCA 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 [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed testing current HEAD 944aacb68baf7624ab8d277d0ebf07f025ca137c testing commit 944aacb68baf7624ab8d277d0ebf07f025ca137c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: eb0bd92bc500308be438663fcac619900937e34e8464d972d52d3fb9b7e8dbe4 run #0: crashed: INFO: task hung in __rmap_walk_file run #1: crashed: INFO: task hung in __rmap_walk_file run #2: crashed: INFO: task hung in __rmap_walk_file run #3: crashed: INFO: task hung in __rmap_walk_file run #4: crashed: INFO: task hung in __rmap_walk_file run #5: crashed: INFO: task hung in __rmap_walk_file run #6: crashed: INFO: task hung in __rmap_walk_file run #7: crashed: INFO: task hung in __rmap_walk_file 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: task hung in __rmap_walk_file, types: [HANG] crash still not fixed/happens on the oldest tested release reproducer is flaky (0.63 repro chance estimate) revisions tested: 8, total time: 4h9m41.887338173s (build: 2h38m0.80714266s, test: 1h11m59.392230136s) crash still not fixed or there were kernel test errors commit msg: Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi crash: INFO: task hung in __rmap_walk_file INFO: task syz.1.116:5419 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.116 state:D stack:12704 pid:5419 tgid:5418 ppid:2851 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x64e/0x17f0 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xac/0x140 kernel/sched/core.c:6960 schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:7017 rwsem_down_read_slowpath+0x282/0x540 kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1261 [inline] __down_read kernel/locking/rwsem.c:1274 [inline] down_read+0x86/0xf0 kernel/locking/rwsem.c:1539 i_mmap_lock_read include/linux/fs.h:532 [inline] __rmap_walk_file+0x9c/0x220 mm/rmap.c:2914 remove_migration_ptes mm/migrate.c:472 [inline] unmap_and_move_huge_page mm/migrate.c:1528 [inline] migrate_hugetlbs mm/migrate.c:1649 [inline] migrate_pages+0x440/0xd60 mm/migrate.c:2088 do_mbind mm/mempolicy.c:1609 [inline] kernel_mbind mm/mempolicy.c:1752 [inline] __do_sys_mbind mm/mempolicy.c:1826 [inline] __se_sys_mbind+0x632/0x720 mm/mempolicy.c:1822 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x85/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f94dd785d19 RSP: 002b:00007f94de52a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed RAX: ffffffffffffffda RBX: 00007f94dd975fa0 RCX: 00007f94dd785d19 RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000000020001000 RBP: 00007f94dd801a20 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f94dd975fa0 R15: 00007ffd1c35a838 INFO: task syz.1.116:5441 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.116 state:D stack:13848 pid:5441 tgid:5418 ppid:2851 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x64e/0x17f0 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xac/0x140 kernel/sched/core.c:6960 io_schedule+0x3e/0x60 kernel/sched/core.c:7789 folio_wait_bit_common+0x1fa/0x3a0 mm/filemap.c:1323 __folio_lock mm/filemap.c:1699 [inline] folio_lock include/linux/pagemap.h:1159 [inline] __filemap_get_folio_mpol+0x70/0x460 mm/filemap.c:1954 __filemap_get_folio include/linux/pagemap.h:763 [inline] filemap_lock_folio include/linux/pagemap.h:825 [inline] filemap_lock_hugetlb_folio include/linux/hugetlb.h:817 [inline] hugetlbfs_zero_partial_page+0x3a/0x130 fs/hugetlbfs/inode.c:664 hugetlbfs_punch_hole fs/hugetlbfs/inode.c:718 [inline] hugetlbfs_fallocate+0x2dc/0x5e0 fs/hugetlbfs/inode.c:751 vfs_fallocate+0x1ab/0x1d0 fs/open.c:339 madvise_remove mm/madvise.c:1046 [inline] madvise_vma_behavior+0x5cf/0x1230 mm/madvise.c:1360 madvise_walk_vmas mm/madvise.c:1721 [inline] madvise_do_behavior+0x30f/0x4c0 mm/madvise.c:1937 do_madvise+0x194/0x1f0 mm/madvise.c:2030 __do_sys_madvise mm/madvise.c:2039 [inline] __se_sys_madvise mm/madvise.c:2037 [inline] __x64_sys_madvise+0x24/0x30 mm/madvise.c:2037 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x85/0x2e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f94dd785d19 RSP: 002b:00007f94de4d6038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007f94dd976080 RCX: 00007f94dd785d19 RDX: 0000000000000009 RSI: 0000000000600002 RDI: 0000000020000000 RBP: 00007f94dd801a20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f94dd976080 R15: 00007ffd1c35a838 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8397d7a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8397d7a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline] #0: ffffffff8397d7a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6775 2 locks held by kworker/u8:2/36: #0: ffff8881036ddd48 ((wq_completion)iou_exit){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline] #0: ffff8881036ddd48 ((wq_completion)iou_exit){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340 #1: ffffc9000018fe48 ((work_completion)(&ctx->exit_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline] #1: ffffc9000018fe48 ((work_completion)(&ctx->exit_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340 2 locks held by kworker/u8:4/321: #0: ffff8881036ddd48 ((wq_completion)iou_exit){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline] #0: ffff8881036ddd48 ((wq_completion)iou_exit){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340 #1: ffffc900020c7e48 ((work_completion)(&ctx->exit_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline] #1: ffffc900020c7e48 ((work_completion)(&ctx->exit_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340 2 locks held by getty/1880: #0: ffff888141a950a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243 #1: ffffc900013fb2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c4/0x700 drivers/tty/n_tty.c:2211 1 lock held by syz.1.116/5419: #0: ffff8881412fe858 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: i_mmap_lock_read include/linux/fs.h:532 [inline] #0: ffff8881412fe858 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: __rmap_walk_file+0x9c/0x220 mm/rmap.c:2914 3 locks held by syz.1.116/5441: #0: ffff8881022fb408 (sb_writers#12){....}-{0:0}, at: vfs_fallocate+0x18f/0x1d0 fs/open.c:338 #1: ffff8881412fe588 (&sb->s_type->i_mutex_key#18){....}-{3:3}, at: inode_lock include/linux/fs.h:1027 [inline] #1: ffff8881412fe588 (&sb->s_type->i_mutex_key#18){....}-{3:3}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:693 [inline] #1: ffff8881412fe588 (&sb->s_type->i_mutex_key#18){....}-{3:3}, at: hugetlbfs_fallocate+0x1f2/0x5e0 fs/hugetlbfs/inode.c:751 #2: ffff8881412fe858 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:512 [inline] #2: ffff8881412fe858 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:701 [inline] #2: ffff8881412fe858 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: hugetlbfs_fallocate+0x24e/0x5e0 fs/hugetlbfs/inode.c:751 2 locks held by kworker/u8:11/6025: #0: ffff888100074948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline] #0: ffff888100074948 ((wq_completion)events_unbound){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3340 #1: ffffc90003a37e48 ((work_completion)(&sub_info->work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline] #1: ffffc90003a37e48 ((work_completion)(&sub_info->work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3340 1 lock held by syz.9.39851/2905: #0: ffffffff8397e778 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #0: ffffffff8397e778 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x2d2/0x610 kernel/rcu/tree_exp.h:956 1 lock held by syz.5.39855/2913: #0: ffffffff8397e778 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline] #0: ffffffff8397e778 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x179/0x610 kernel/rcu/tree_exp.h:956 2 locks held by modprobe/2956: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x52/0x80 lib/dump_stack.c:120 nmi_cpu_backtrace+0xbb/0x110 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x95/0xb0 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline] watchdog+0x590/0x5b0 kernel/hung_task.c:515 kthread+0x203/0x230 kernel/kthread.c:463 ret_from_fork+0xf2/0x230 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 13712 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:find_held_lock kernel/locking/lockdep.c:5350 [inline] RIP: 0010:__lock_release kernel/locking/lockdep.c:5535 [inline] RIP: 0010:lock_release+0xee/0x2e0 kernel/locking/lockdep.c:5889 Code: 5c 24 08 45 8d 6c 24 ff 49 63 c5 48 8d 1c 80 49 8d 2c df 48 81 c5 88 0a 00 00 48 89 ef 4c 89 f6 e8 e7 21 83 01 44 89 6c 24 04 <85> c0 0f 84 a3 00 00 00 48 85 ed 0f 84 de 00 00 00 8b 45 20 3d 00 RSP: 0000:ffffc90005bef818 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000005 RCX: 0000000000000046 RDX: ffffc90005bec000 RSI: ffffffff8397d7a0 RDI: ffff88811a3ea6f0 RBP: ffff88811a3ea6f0 R08: ffffc90005bef940 R09: ffffffff83cb1d70 R10: ffffffff812a562e R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000001 R14: ffffffff8397d7a0 R15: ffff88811a3e9c40 FS: 000055558032e500(0000) GS:ffff8881b720f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcba2842a8 CR3: 000000011a30f000 CR4: 0000000000350ef0 Call Trace: rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:897 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xb4f/0xd00 arch/x86/kernel/unwind_orc.c:695 __unwind_start+0x182/0x1e0 arch/x86/kernel/unwind_orc.c:773 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x46/0x70 kernel/stacktrace.c:122 save_stack+0xf1/0x150 mm/page_owner.c:165 __set_page_owner+0x24/0x170 mm/page_owner.c:341 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook mm/page_alloc.c:1857 [inline] prep_new_page+0xe1/0x120 mm/page_alloc.c:1865 get_page_from_freelist+0x141e/0x1470 mm/page_alloc.c:3915 __alloc_frozen_pages_noprof+0xf2/0x290 mm/page_alloc.c:5210 alloc_pages_mpol+0x10e/0x200 mm/mempolicy.c:2486 folio_alloc_mpol_noprof+0xf/0xd0 mm/mempolicy.c:2505 vma_alloc_folio_noprof+0x104/0x160 mm/mempolicy.c:2540 folio_prealloc include/linux/pgtable.h:-1 [inline] wp_page_copy mm/memory.c:3719 [inline] do_wp_page+0x716/0x17f0 mm/memory.c:4180 handle_pte_fault mm/memory.c:6289 [inline] __handle_mm_fault mm/memory.c:6411 [inline] handle_mm_fault+0xa7b/0x22f0 mm/memory.c:6580 do_user_addr_fault+0x1a8/0x720 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f447e37c108 Code: 84 e4 74 66 e8 89 04 00 00 41 89 c4 85 c0 0f 84 4e 01 00 00 49 c7 c5 a8 ff ff ff 64 45 8b 75 00 48 89 da 89 ee bf 02 00 00 00 93 09 00 00 45 85 e4 79 05 64 45 89 75 00 48 8b 84 24 c8 00 00 RSP: 002b:00007ffcba2842b0 EFLAGS: 00010202 RAX: 0000000000000c7a RBX: 0000000000000000 RCX: 00007f447e37c593 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: 000055558032e7d0 R11: 0000000000000246 R12: 0000000000000c7a R13: ffffffffffffffa8 R14: 0000000000000006 R15: 000000000000063b