ci starts bisection 2025-07-15 10:15:36.659564735 +0000 UTC m=+74923.000291980
bisecting cause commit starting from 0be23810e32e6d0a17df7c0ebad895ba2c210fc4
building syzkaller on 03fcfc4b7385b545a89a3fc62bef4e1ec7532e0d
ensuring issue is reproducible on original commit 0be23810e32e6d0a17df7c0ebad895ba2c210fc4

testing commit 0be23810e32e6d0a17df7c0ebad895ba2c210fc4 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: aeca6e272e3f062a37d26efbb8eb9afd993d986de4cf0a338aab0f5dfc912899
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, 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 0be23810e32e6d0a17df7c0ebad895ba2c210fc4 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: e2b928410e4b6c22b7c3d9f975d92e5b73898a1bbc9dff3482cdc95138c8cdcb
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
kconfig minimization: base=4095 full=8524 leaves diff=2188
split chunks (needed=false): <2188>
split chunk #0 of len 2188 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 0be23810e32e6d0a17df7c0ebad895ba2c210fc4 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: eff67ff01189850837ea9ffe25835acaa33a2d81651c7675d45f83ecff098ead
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed
testing commit 0be23810e32e6d0a17df7c0ebad895ba2c210fc4 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: a9b5624bdab4eaa7e04aa983b969af6df858402e67b2621701007363fdb72029
all runs: OK
false negative chance: 0.000
testing without sub-chunk 3/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 0be23810e32e6d0a17df7c0ebad895ba2c210fc4 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: b14c5b588d494007234714683404d93b2e67c8ef06544301f9d06e3f65fa5802
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit 0be23810e32e6d0a17df7c0ebad895ba2c210fc4 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: f17e1635ea1b3d3d4f7eda5f8b3288abe2ab38b7653295aa8bf84d97da89403b
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit 0be23810e32e6d0a17df7c0ebad895ba2c210fc4 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 6c8331c33c65494e5ac2da32d2a1c6a97c91063cc26f3cf87f51b25d7d72c7a8
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
the chunk can be dropped
minimized to 438 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI BLK_DEV_ZONED CHARGER_BQ24190 CMA COMMON_CLK DAMON DAMON_VADDR DAX DCA DCB DEBUG_VFS DEFAULT_CODEL DEVICE_MIGRATION DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DLM DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_CMA_LEGACY DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_ENGINE_RAID DM_AUDIT DM_BIO_PRISON DM_BUFIO DM_CACHE DM_CACHE_SMQ DM_CLONE DM_CRYPT DM_FLAKEY DM_INTEGRITY DM_MULTIPATH DM_MULTIPATH_QL DM_MULTIPATH_ST DM_PERSISTENT_DATA DM_RAID DM_SNAPSHOT DM_THIN_PROVISIONING DM_UEVENT DM_VERITY DM_VERITY_FEC DM_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_AUX_BRIDGE DRM_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_CLIENT DRM_CLIENT_DEFAULT_FBDEV DRM_CLIENT_LIB DRM_CLIENT_SELECTION DRM_CLIENT_SETUP DRM_DEBUG_MM DRM_DISPLAY_DP_AUX_BUS DRM_DISPLAY_DP_HELPER DRM_DISPLAY_DSC_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_SYSFB_HELPER DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VIRTIO_GPU_KMS DRM_VKMS DRM_VMWGFX DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB DVB_CORE DVB_DIB3000MB DVB_DIB3000MC DVB_EC100 DVB_GP8PSK_FE DVB_RTL2830 DVB_RTL2832 DVB_RTL2832_SDR DVB_TEST_DRIVERS DVB_TTUSB_BUDGET DVB_TTUSB_DEC DVB_USB DVB_USB_A800 DVB_USB_AF9005 DVB_USB_AF9005_REMOTE DVB_USB_AF9015 DVB_USB_AF9035 DVB_USB_ANYSEE DVB_USB_AU6610 DVB_USB_AZ6007 DVB_USB_AZ6027 DVB_USB_CE6230 DVB_USB_CINERGY_T2 DVB_USB_CXUSB DVB_USB_CXUSB_ANALOG DVB_USB_DIB0700 DVB_USB_DIB3000MC DVB_USB_DIBUSB_MB DVB_USB_DIBUSB_MC DVB_USB_DIGITV DVB_USB_DTT200U DVB_USB_DTV5100 DVB_USB_DVBSKY DVB_USB_DW2102 DVB_USB_EC168 DVB_USB_GL861 DVB_USB_GP8PSK DVB_USB_LME2510 DVB_USB_M920X DVB_USB_MXL111SF DVB_USB_NOVA_T_USB2 DVB_USB_OPERA1 DVB_USB_PCTV452E DVB_USB_RTL28XXU DVB_USB_TECHNISAT_USB2 DVB_USB_TTUSB2 DVB_USB_UMT_010 DVB_USB_V2 DVB_USB_VP702X DVB_USB_VP7045 DVB_USB_ZD1301 DVB_VIDTV DVB_ZL10353 ECRYPT_FS ECRYPT_FS_MESSAGING EDAC EFS_FS ENCRYPTED_KEYS EQUALIZER EROFS_FS EROFS_FS_POSIX_ACL EROFS_FS_SECURITY EROFS_FS_XATTR EROFS_FS_ZIP EVM EVM_ADD_XATTRS EVM_ATTR_FSUUID EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXTCON EXTCON_INTEL_CHT_WC EXTCON_PTN5150 EXTCON_USBC_TUSB320 F2FS_CHECK_FS F2FS_FAULT_INJECTION F2FS_FS F2FS_FS_COMPRESSION F2FS_FS_LZ4 F2FS_FS_LZ4HC F2FS_FS_LZO F2FS_FS_LZORLE F2FS_FS_POSIX_ACL F2FS_FS_SECURITY F2FS_FS_XATTR F2FS_FS_ZSTD F2FS_STAT_FS FANOTIFY FANOTIFY_ACCESS_PERMISSIONS FB FB_CFB_COPYAREA FB_CFB_FILLRECT FB_CFB_IMAGEBLIT FB_CORE FB_DEFERRED_IO FB_DEVICE FB_IOMEM_FOPS FB_IOMEM_HELPERS FB_NOTIFY FB_SYSMEM_FOPS FB_SYSMEM_HELPERS FB_SYSMEM_HELPERS_DEFERRED FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VESA FB_VGA16 FB_VIRTUAL FDDI FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FONT_8x16 FONT_8x8 FONT_SUPPORT FRAMEBUFFER_CONSOLE FRAMEBUFFER_CONSOLE_DETECT_PRIMARY FRAMEBUFFER_CONSOLE_ROTATION FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_STACK FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FUSE_DAX FUSE_FS FW_LOADER_COMPRESS FW_LOADER_PAGED_BUF FW_LOADER_SYSFS FW_LOADER_USER_HELPER FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GARP GENDWARFKSYMS GENERIC_IRQ_ENTRY GENERIC_PHY GENERIC_SYSCALL GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GNSS GNSS_USB GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_LJCA GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GROUP_SCHED_BANDWIDTH GTP GUEST_PERF_EVENTS GVE HAS_LTO_CLANG HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_IRQCHIP HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_KVM_READONLY_MEM HAVE_SCHED_AVG_IRQ HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS HID_ACCUTOUCH HID_ACRUX HID_ACRUX_FF HID_ALPS HID_APPLEIR HID_ASUS HID_AUREAL HID_BATTERY_STRENGTH HID_BETOP_FF HID_BIGBEN_FF HID_CMEDIA HID_CORSAIR HID_COUGAR HID_CP2112 HID_CREATIVE_SB0540 HID_DRAGONRISE HID_ELAN HID_ELECOM HID_ELO HID_EMS_FF HID_EVISION HID_FT260 HID_GEMBIRD HID_GFRM HID_GLORIOUS HID_GOOGLE_STADIA_FF HID_GREENASIA HID_GT683R HID_HOLTEK HID_ICADE HID_JABRA HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LETSKETCH HID_LOGITECH HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2200 HID_MCP2221 HID_MEGAWORLD_FF HID_MULTITOUCH HID_NTI HID_ORTEK HID_PENMOUNT HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_PXRC HID_RAZER HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SEMITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_INTEL_HINGE HID_SENSOR_CUSTOM_SENSOR HID_SENSOR_DEVICE_ROTATION HID_SENSOR_GYRO_3D HID_SENSOR_HUB HID_SENSOR_HUMIDITY HID_SENSOR_IIO_COMMON HID_SENSOR_IIO_TRIGGER HID_SENSOR_INCLINOMETER_3D HID_SENSOR_MAGNETOMETER_3D HID_SENSOR_PRESS HID_SENSOR_PROX HID_SENSOR_TEMP HID_SIGMAMICRO HID_SPEEDLINK HID_STEELSERIES HID_THINGM HID_TIVO HID_TOPRE HID_TWINHAN HID_U2FZERO HID_UCLOGIC HID_UDRAW_PS3 HID_VIEWSONIC HID_VIVALDI HID_VIVALDI_COMMON HID_VRC2 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XIAOMI HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_CP2615 I2C_DESIGNWARE_CORE I2C_DESIGNWARE_PLATFORM I2C_DIOLAN_U2C I2C_DLN2 I2C_HID_ACPI I2C_HID_CORE I2C_HID_OF I2C_LJCA I2C_MUX I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB IIO IIO_BUFFER IIO_KFIFO_BUF IIO_TRIGGER IIO_TRIGGERED_BUFFER IKCONFIG IKCONFIG_PROC IMA IMA_APPRAISE IMA_APPRAISE_MODSIG IMA_DEFAULT_HASH_SHA256 IMA_LSM_RULES IMA_MEASURE_ASYMMETRIC_KEYS IMA_NG_TEMPLATE IMA_QUEUE_EARLY_BOOT_KEYS IMA_READ_POLICY IMA_WRITE_POLICY INET6_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_DIAG INET_TCP_DIAG INET_UDP_DIAG INET_XFRM_TUNNEL INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_ADDR_TRANS_CONFIGFS INFINIBAND_IPOIB INFINIBAND_IPOIB_CM INFINIBAND_IPOIB_DEBUG INFINIBAND_ISER INFINIBAND_ON_DEMAND_PAGING INFINIBAND_RTRS INFINIBAND_SRP INFINIBAND_USER_ACCESS INFINIBAND_USER_MAD INFINIBAND_USER_MEM INPUT_ATI_REMOTE2 INPUT_CM109 INPUT_IMS_PCU INPUT_JOYDEV INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_UINPUT INPUT_YEALINK INTEGRITY INTEGRITY_ASYMMETRIC_KEYS INTEGRITY_AUDIT INTEGRITY_SIGNATURE INTEGRITY_TRUSTED_KEYRING INTEL_CHTWC_INT33FE INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_ISHTP_ECLITE INTEL_ISH_FIRMWARE_DOWNLOADER INTEL_ISH_HID INTEL_SOC_PMIC_CHTWC INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_DRIVER IOMMUFD_DRIVER_CORE IOMMUFD_TEST IO_URING_ZCRX IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_NAT IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL IP6_NF_TARGET_MASQUERADE IP6_NF_TARGET_NPT IP6_NF_TARGET_SYNPROXY IPV6_FOU IPV6_FOU_TUNNEL IPV6_GRE IPV6_ILA IPV6_MIP6 IPV6_MROUTE IPV6_MROUTE_MULTIPLE_TABLES IPV6_MULTIPLE_TABLES IPV6_OPTIMISTIC_DAD IPV6_PIMSM_V2 IPV6_ROUTER_PREF IPV6_ROUTE_INFO IPV6_RPL_LWTUNNEL IPV6_SEG6_BPF IPV6_SEG6_HMAC IPV6_SEG6_LWTUNNEL IPV6_SIT_6RD IPV6_SUBTREES IP_SCTP IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE LEDS_CLASS_MULTICOLOR MAC802154 MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_VIPERBOARD MODVERSIONS MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NET_SCH_DEFAULT NFT_COMPAT NFT_FWD_NETDEV NF_TABLES NF_TABLES_NETDEV PAGE_POOL RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TRUSTED_KEYS TYPEC TYPEC_MUX_PI3USB30532 USB_LJCA USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE]
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
picked [v6.15 v6.14 v6.13 v6.11 v6.9 v6.7 v6.5 v6.3 v6.0 v5.17 v5.14 v5.11 v5.8 v5.5 v5.2 v4.20 v4.19] out of 38 release tags
testing release v6.15
testing commit 0ff41df1cb268fc69e703a08a57ee14ae967d0ca gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 0e3a0ee6b6bed6c06e240671139d252c724391e6c6eec39e144b6d1e7995ef9f
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
testing release v6.14
testing commit 38fec10eb60d687e30c8c6b5420d86e8149f7557 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: b47e59bb4bd8b0e8e00371ee46f8d2573a6bf978d00f58ef3d70c48e64261869
all runs: OK
false negative chance: 0.000
# git bisect start 0ff41df1cb268fc69e703a08a57ee14ae967d0ca 38fec10eb60d687e30c8c6b5420d86e8149f7557
Bisecting: 8357 revisions left to test after this (roughly 13 steps)
[390513642ee6763c7ada07f0a1470474986e6c1c] io_uring: always do atomic put from iowq

testing commit 390513642ee6763c7ada07f0a1470474986e6c1c gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: d9f7d33995c69c83e7deecfbbcbf39a7cc0342dc24959c4798d6fa282ce39ebb
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
# git bisect bad 390513642ee6763c7ada07f0a1470474986e6c1c
Bisecting: 3789 revisions left to test after this (roughly 12 steps)
[9b960d8cd6f712cb2c03e2bdd4d5ca058238037f] Merge tag 'for-6.15/block-20250322' of git://git.kernel.dk/linux

testing commit 9b960d8cd6f712cb2c03e2bdd4d5ca058238037f gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 87ed72f385b426a87614b776e7f8bfb0a8f298e1aa0881365614c358882896b1
all runs: OK
false negative chance: 0.000
# git bisect good 9b960d8cd6f712cb2c03e2bdd4d5ca058238037f
Bisecting: 1916 revisions left to test after this (roughly 11 steps)
[023b1e9d265ca0662111a9df23d22b4632717a8a] Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

testing commit 023b1e9d265ca0662111a9df23d22b4632717a8a gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: d106d54e5bb96a6db149f0a210214e79c05276e6c6d427c1a3ec6617935c5a58
all runs: OK
false negative chance: 0.000
# git bisect good 023b1e9d265ca0662111a9df23d22b4632717a8a
Bisecting: 966 revisions left to test after this (roughly 10 steps)
[3a90a72aca0a98125f0c7350ffb7cc63665f8047] Merge tag 'asm-generic-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

testing commit 3a90a72aca0a98125f0c7350ffb7cc63665f8047 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: f3df27361abb87b85dd177f1945606c573691da55f1c20901e46590138ac37b8
all runs: OK
false negative chance: 0.000
# git bisect good 3a90a72aca0a98125f0c7350ffb7cc63665f8047
Bisecting: 410 revisions left to test after this (roughly 9 steps)
[4a4b30ea80d8cb5e8c4c62bb86201f4ea0d9b030] Merge tag 'bcachefs-2025-03-24' of git://evilpiepirate.org/bcachefs

testing commit 4a4b30ea80d8cb5e8c4c62bb86201f4ea0d9b030 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 54e0b332d03975ee8a93243fb15725573fdf947584311fcd09d9d8b4f3c84227
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
# git bisect bad 4a4b30ea80d8cb5e8c4c62bb86201f4ea0d9b030
Bisecting: 275 revisions left to test after this (roughly 8 steps)
[0de1e84263a2cc47fc642bcccee589a1e5220792] Merge tag 'dlm-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm

testing commit 0de1e84263a2cc47fc642bcccee589a1e5220792 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 0c71b64bbb3c8cfaf43f9eb1f5c14aecfa65f1692b86f4a86075fd3884ae391e
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
# git bisect bad 0de1e84263a2cc47fc642bcccee589a1e5220792
Bisecting: 139 revisions left to test after this (roughly 7 steps)
[7511e29cf1355b2c47d0effb39e463119913e2f6] btrfs: harden block_group::bg_list against list_del() races

testing commit 7511e29cf1355b2c47d0effb39e463119913e2f6 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 5f6ccb9500e4bb5936409df670b4d13b4664a323818c5a0227abfc3ed0a5de59
all runs: OK
false negative chance: 0.000
# git bisect good 7511e29cf1355b2c47d0effb39e463119913e2f6
Bisecting: 71 revisions left to test after this (roughly 6 steps)
[21263d035ff21fa0ccf79adba20bab9cd8cca0f2] f2fs: fix missing discard for active segments

testing commit 21263d035ff21fa0ccf79adba20bab9cd8cca0f2 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 54b901d33c6957a51effad0f373e573d75553da6d6ce2d2be709f17744b8acf9
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
# git bisect bad 21263d035ff21fa0ccf79adba20bab9cd8cca0f2
Bisecting: 33 revisions left to test after this (roughly 5 steps)
[520b17e093f42e5d71fdc36e5203cec69188ea56] f2fs: Use a folio throughout f2fs_truncate_inode_blocks()

testing commit 520b17e093f42e5d71fdc36e5203cec69188ea56 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 21d6f9a401c37cec3a439bc974051c4fab54e916de4e2af3e348a4a7f338cbd3
all runs: OK
false negative chance: 0.000
# git bisect good 520b17e093f42e5d71fdc36e5203cec69188ea56
Bisecting: 16 revisions left to test after this (roughly 4 steps)
[448a834f89add24191f73661e6133062cc580317] f2fs: Remove check for ->writepage

testing commit 448a834f89add24191f73661e6133062cc580317 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: ff1a99f7e99714e9bf03d4d6309b17e00dab8d2d669d13fb4a8a4105df743754
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
# git bisect bad 448a834f89add24191f73661e6133062cc580317
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[0cd402baa03b0cd790ddbfbce5aadb2ab6373263] f2fs: Add f2fs_find_data_folio()

testing commit 0cd402baa03b0cd790ddbfbce5aadb2ab6373263 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: f76df8988cea20614d782e75a3659f2c710770cbbe83b75160fc9746fe6dbbc6
all runs: OK
false negative chance: 0.000
# git bisect good 0cd402baa03b0cd790ddbfbce5aadb2ab6373263
Bisecting: 4 revisions left to test after this (roughly 2 steps)
[1cf6b5670af1f4e9d5bf2f7201e368733c59cbdd] f2fs: do sanity check on inode footer in f2fs_get_inode_page()

testing commit 1cf6b5670af1f4e9d5bf2f7201e368733c59cbdd gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
failed building 1cf6b5670af1f4e9d5bf2f7201e368733c59cbdd: fs/f2fs/node.c:3331:3: error: call to undeclared function 'disable_nat_bits'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
# git bisect skip 1cf6b5670af1f4e9d5bf2f7201e368733c59cbdd
Bisecting: 4 revisions left to test after this (roughly 2 steps)
[2aac2538a97d35b0a1beb60dce6001f5625b82e6] f2fs: do sanity check on xattr node footer in f2fs_get_xnode_page()

testing commit 2aac2538a97d35b0a1beb60dce6001f5625b82e6 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
failed building 2aac2538a97d35b0a1beb60dce6001f5625b82e6: fs/f2fs/node.c:3341:3: error: call to undeclared function 'disable_nat_bits'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
# git bisect skip 2aac2538a97d35b0a1beb60dce6001f5625b82e6
Bisecting: 4 revisions left to test after this (roughly 2 steps)
[986c50f6bca109c6cf362b4e2babcb85aba958f6] f2fs: fix to avoid accessing uninitialized curseg

testing commit 986c50f6bca109c6cf362b4e2babcb85aba958f6 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
failed building 986c50f6bca109c6cf362b4e2babcb85aba958f6: fs/f2fs/node.c:3342:3: error: call to undeclared function 'disable_nat_bits'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
# git bisect skip 986c50f6bca109c6cf362b4e2babcb85aba958f6
Bisecting: 4 revisions left to test after this (roughly 2 steps)
[1788971e0bfae0911e356ba7f8a517d659d6709d] f2fs: introduce FAULT_INCONSISTENT_FOOTER

testing commit 1788971e0bfae0911e356ba7f8a517d659d6709d gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
failed building 1788971e0bfae0911e356ba7f8a517d659d6709d: fs/f2fs/node.c:3342:3: error: call to undeclared function 'disable_nat_bits'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
# git bisect skip 1788971e0bfae0911e356ba7f8a517d659d6709d
Bisecting: 4 revisions left to test after this (roughly 2 steps)
[8a2d9f00d502e6ef68c6d52f0863856040ddd2db] f2fs: set highest IO priority for checkpoint thread

testing commit 8a2d9f00d502e6ef68c6d52f0863856040ddd2db gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: d07c1004e0f04776c6913856d3d0c89d9d5bc2cac112b096e6988f88b958a06c
all runs: OK
false negative chance: 0.000
# git bisect good 8a2d9f00d502e6ef68c6d52f0863856040ddd2db
Bisecting: 2 revisions left to test after this (roughly 2 steps)
[19426c4988aa85298c1b4caf2889d37ec5c80fea] Revert "f2fs: rebuild nat_bits during umount"

testing commit 19426c4988aa85298c1b4caf2889d37ec5c80fea gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 1f512b2b19e5f6861bbef1ad1ce1cb303c6add88891a1d0aca93ff34e5a64935
all runs: crashed: INFO: task hung in f2fs_issue_checkpoint
representative crash: INFO: task hung in f2fs_issue_checkpoint, types: [HANG]
# git bisect bad 19426c4988aa85298c1b4caf2889d37ec5c80fea
Bisecting: 2 revisions left to test after this (roughly 2 steps)
[c2ecba026586cda6c7dc0fe9e6e60e7e9386c3bd] f2fs: control nat_bits feature via mount option

testing commit c2ecba026586cda6c7dc0fe9e6e60e7e9386c3bd gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
failed building c2ecba026586cda6c7dc0fe9e6e60e7e9386c3bd: fs/f2fs/node.c:3310:3: error: call to undeclared function 'disable_nat_bits'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
# git bisect skip c2ecba026586cda6c7dc0fe9e6e60e7e9386c3bd
There are only 'skip'ped commits left to test.
The first bad commit could be any of:
2aac2538a97d35b0a1beb60dce6001f5625b82e6
1788971e0bfae0911e356ba7f8a517d659d6709d
1cf6b5670af1f4e9d5bf2f7201e368733c59cbdd
986c50f6bca109c6cf362b4e2babcb85aba958f6
c2ecba026586cda6c7dc0fe9e6e60e7e9386c3bd
19426c4988aa85298c1b4caf2889d37ec5c80fea
We cannot bisect more!

accumulated error probability: 0.00
revisions tested: 22, total time: 8h16m58.08883603s (build: 4h32m20.886246811s, test: 3h4m3.278420478s)
bisection is inconclusive, the first bad commit could be any of:
2aac2538a97d35b0a1beb60dce6001f5625b82e6
1788971e0bfae0911e356ba7f8a517d659d6709d
1cf6b5670af1f4e9d5bf2f7201e368733c59cbdd
986c50f6bca109c6cf362b4e2babcb85aba958f6
c2ecba026586cda6c7dc0fe9e6e60e7e9386c3bd
19426c4988aa85298c1b4caf2889d37ec5c80fea