ci2 starts bisection 2025-09-03 06:01:24.65028621 +0000 UTC m=+61009.061881946 bisecting fixing commit since 3f31a806a62e44f7498e2d17719c03f816553f11 building syzkaller on 3cda49cfaa8556b73277ccd7e75952f0f2de2d74 ensuring issue is reproducible on original commit 3f31a806a62e44f7498e2d17719c03f816553f11 testing commit 3f31a806a62e44f7498e2d17719c03f816553f11 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1cd902b4a5b29d1fec94aaa6adc21a349782ad71c3b4df6190962b0b1e1b309b all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed testing commit 3f31a806a62e44f7498e2d17719c03f816553f11 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4642a7241ef5271f6660b8cfbaa066dcbba37b581f9d9e546f1e60a66fcf332a all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, 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=4092 full=8474 leaves diff=2183 split chunks (needed=false): <2183> split chunk #0 of len 2183 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 3f31a806a62e44f7498e2d17719c03f816553f11 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 70f02c327922a534c5ea6b5466f01c9e52589041bd08b79c4b8b0b34c0eba89a all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, 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 3f31a806a62e44f7498e2d17719c03f816553f11 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b7ff779ed09d733ce9fe2a9a2fd185d7429008d113c4baec727ad4e59914e7ab 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 3f31a806a62e44f7498e2d17719c03f816553f11 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 08aa4ea9ba913701a98b7f76b029583ffdd94783869b34da3891abf02c48831f all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, 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 3f31a806a62e44f7498e2d17719c03f816553f11 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 45e580474f45afe88511aae18b75f8701138a81426e18018372812548ebdb70d all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed testing commit 3f31a806a62e44f7498e2d17719c03f816553f11 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e1a0f446a1391499723303534ba02c9feefc258048bc2cb922aae8725ae47e0d all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] the chunk can be dropped minimized to 437 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI BLK_DEV_ZONED CHARGER_BQ24190 CMA COMMON_CLK CYPRESS_FIRMWARE DAMON DAMON_PADDR DAMON_RECLAIM 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_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 EVM_EXTRA_SMACK_XATTRS 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_PHY GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GNSS GNSS_USB GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_LJCA GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GUEST_PERF_EVENTS 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 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 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 [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed testing current HEAD e6b9dce0aeeb91dfc0974ab87f02454e24566182 testing commit e6b9dce0aeeb91dfc0974ab87f02454e24566182 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5ed01a75aa3df90ecbc3bbcf9df876b8680a3d04ea283fe9da45733c4809b1ed all runs: OK false negative chance: 0.000 # git bisect start e6b9dce0aeeb91dfc0974ab87f02454e24566182 3f31a806a62e44f7498e2d17719c03f816553f11 Bisecting: 6951 revisions left to test after this (roughly 13 steps) [8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf] Merge tag 'net-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next determine whether the revision contains the guilty commit revision 3f31a806a62e44f7498e2d17719c03f816553f11 crashed and is reachable testing commit 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7e070ddd564d30ec68aab953f54db99106e334fe9d9098c06d467a4d153c3734 all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] # git bisect good 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf Bisecting: 3403 revisions left to test after this (roughly 12 steps) [2d945dde7fa3f17f46349360a9f97614de9f47da] Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux determine whether the revision contains the guilty commit revision 3f31a806a62e44f7498e2d17719c03f816553f11 crashed and is reachable testing commit 2d945dde7fa3f17f46349360a9f97614de9f47da gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3c412372974bb7186c33da30697cb7e4944963c2e3c967e75ccc4ec89ae1b9b8 all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] # git bisect good 2d945dde7fa3f17f46349360a9f97614de9f47da Bisecting: 1723 revisions left to test after this (roughly 11 steps) [35a813e010b99894bb4706c56c16a580bf7959c2] Merge tag 'printk-for-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux determine whether the revision contains the guilty commit revision 3f31a806a62e44f7498e2d17719c03f816553f11 crashed and is reachable testing commit 35a813e010b99894bb4706c56c16a580bf7959c2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: cef6c948ea4b09084ef62f6021a788aa2b30216eec4578277b7746595406e1e4 all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] # git bisect good 35a813e010b99894bb4706c56c16a580bf7959c2 Bisecting: 861 revisions left to test after this (roughly 10 steps) [615b690612b7785ab8632f6a5a941550622e4e36] net/mlx5: HWS, fix simple rules rehash error flow determine whether the revision contains the guilty commit revision 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf crashed and is reachable testing commit 615b690612b7785ab8632f6a5a941550622e4e36 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 61dbfbd75712a22fef11ec7e47a30c38fae06afbfec769704d8ec5eb4239af39 all runs: OK false negative chance: 0.000 # git bisect bad 615b690612b7785ab8632f6a5a941550622e4e36 Bisecting: 432 revisions left to test after this (roughly 9 steps) [b1e06c19abd2efbdd080047b2e70195c04ac2139] Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost determine whether the revision contains the guilty commit revision 35a813e010b99894bb4706c56c16a580bf7959c2 crashed and is reachable testing commit b1e06c19abd2efbdd080047b2e70195c04ac2139 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3f020b43854fa05fc7ee613cf6b3ecb0ae55d37cd0ab7449c0d2dc1fc4def974 all runs: OK false negative chance: 0.000 # git bisect bad b1e06c19abd2efbdd080047b2e70195c04ac2139 Bisecting: 255 revisions left to test after this (roughly 8 steps) [7881cd6886a89eda848192d3f5759ce08672e084] media: venus: Fix OPP table error handling determine whether the revision contains the guilty commit revision 3f31a806a62e44f7498e2d17719c03f816553f11 crashed and is reachable testing commit 7881cd6886a89eda848192d3f5759ce08672e084 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 793d06022e8201209fd5003e887fef7bf4f562399108fcf86eff4fad83b2023d all runs: OK false negative chance: 0.000 # git bisect bad 7881cd6886a89eda848192d3f5759ce08672e084 Bisecting: 86 revisions left to test after this (roughly 7 steps) [816aa305cd499c5fd53a1960b6fa3e80b909d922] f2fs: Remove F2FS_P_SB() determine whether the revision contains the guilty commit checking the merge base 78f4e737a53e1163ded2687a922fce138aee73f5 no existing result, test the revision testing commit 78f4e737a53e1163ded2687a922fce138aee73f5 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: eddd4e5e3cb3aae634006bc69ffe7726fcb00d60aa7bf6db52d9c44c65b07304 all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] testing commit 816aa305cd499c5fd53a1960b6fa3e80b909d922 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: cac225de711969dc8dffbb7617bd7a63539b6c618ba0b6a09303be6938aabdf5 all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] # git bisect good 816aa305cd499c5fd53a1960b6fa3e80b909d922 Bisecting: 46 revisions left to test after this (roughly 6 steps) [084d2ac4030c5919e85bba1f4af26e33491469cb] selftests/perf_events: Add a mmap() correctness test determine whether the revision contains the guilty commit revision 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf crashed and is reachable testing commit 084d2ac4030c5919e85bba1f4af26e33491469cb gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 54d54b1e44849e5f2ffe03449194d989122a3bf8f92a30b505c4cf77faa54c13 all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] # git bisect good 084d2ac4030c5919e85bba1f4af26e33491469cb Bisecting: 23 revisions left to test after this (roughly 5 steps) [838955f64ae7582f009a3538889bb9244f37ab26] execmem: introduce execmem_alloc_rw() determine whether the revision contains the guilty commit revision 78f4e737a53e1163ded2687a922fce138aee73f5 crashed and is reachable testing commit 838955f64ae7582f009a3538889bb9244f37ab26 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2c3b145c7994ac3974f5592acd3a4013fb777032a6782153d79bfab2f4170838 all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] # git bisect good 838955f64ae7582f009a3538889bb9244f37ab26 Bisecting: 11 revisions left to test after this (roughly 4 steps) [93c0476e705768c7ca902cffea4efb500b9678b4] mm/shmem, swap: rework swap entry and index calculation for large swapin determine whether the revision contains the guilty commit revision 838955f64ae7582f009a3538889bb9244f37ab26 crashed and is reachable testing commit 93c0476e705768c7ca902cffea4efb500b9678b4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bb058f5e68fcc0375f72962620d8f796ab755d190537b2f2587cdc1a9d0103da all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] # git bisect good 93c0476e705768c7ca902cffea4efb500b9678b4 Bisecting: 4 revisions left to test after this (roughly 3 steps) [5998f2bca43e071e9c5a26cc7e7e00f9a78791c4] Merge tag 'exfat-for-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat determine whether the revision contains the guilty commit revision 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf crashed and is reachable testing commit 5998f2bca43e071e9c5a26cc7e7e00f9a78791c4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7028a3245cc650eab9bb3df8732949fff5659e350c5969dc3e947c5bc950ce3b all runs: OK false negative chance: 0.000 # git bisect bad 5998f2bca43e071e9c5a26cc7e7e00f9a78791c4 Bisecting: 3 revisions left to test after this (roughly 2 steps) [a2152fef29020e740ba0276930f3a24440012505] mm: mempool: fix crash in mempool_free() for zero-minimum pools determine whether the revision contains the guilty commit revision 93c0476e705768c7ca902cffea4efb500b9678b4 crashed and is reachable testing commit a2152fef29020e740ba0276930f3a24440012505 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6602376cfddda31be1381b777a38acf4dab5eefe86016d3b9756f46bb6d9e32d all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] # git bisect good a2152fef29020e740ba0276930f3a24440012505 Bisecting: 1 revision left to test after this (roughly 1 step) [99f9a97dce39ad413c39b92c90393bbd6778f3fd] exfat: add cluster chain loop check for dir determine whether the revision contains the guilty commit revision 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf crashed and is reachable testing commit 99f9a97dce39ad413c39b92c90393bbd6778f3fd gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1f8ea861e31abe447375c950a634b88ea63f58023b67993027770c7cd6e241d4 all runs: OK false negative chance: 0.000 # git bisect bad 99f9a97dce39ad413c39b92c90393bbd6778f3fd Bisecting: 0 revisions left to test after this (roughly 0 steps) [2f2d42a17b5a6711378d39df74f1f69a831c5d4e] exfat: fdatasync flag should be same like generic_write_sync() determine whether the revision contains the guilty commit revision 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf crashed and is reachable testing commit 2f2d42a17b5a6711378d39df74f1f69a831c5d4e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2c497a99e065d81202376d960d4bb1c1e09d8f1c86b3357a7f1782690f139c7c all runs: crashed: INFO: task hung in lock_two_directories representative crash: INFO: task hung in lock_two_directories, types: [HANG] # git bisect good 2f2d42a17b5a6711378d39df74f1f69a831c5d4e 99f9a97dce39ad413c39b92c90393bbd6778f3fd is the first bad commit commit 99f9a97dce39ad413c39b92c90393bbd6778f3fd Author: Yuezhang Mo Date: Tue Mar 18 17:00:49 2025 +0800 exfat: add cluster chain loop check for dir An infinite loop may occur if the following conditions occur due to file system corruption. (1) Condition for exfat_count_dir_entries() to loop infinitely. - The cluster chain includes a loop. - There is no UNUSED entry in the cluster chain. (2) Condition for exfat_create_upcase_table() to loop infinitely. - The cluster chain of the root directory includes a loop. - There are no UNUSED entry and up-case table entry in the cluster chain of the root directory. (3) Condition for exfat_load_bitmap() to loop infinitely. - The cluster chain of the root directory includes a loop. - There are no UNUSED entry and bitmap entry in the cluster chain of the root directory. (4) Condition for exfat_find_dir_entry() to loop infinitely. - The cluster chain includes a loop. - The unused directory entries were exhausted by some operation. (5) Condition for exfat_check_dir_empty() to loop infinitely. - The cluster chain includes a loop. - The unused directory entries were exhausted by some operation. - All files and sub-directories under the directory are deleted. This commit adds checks to break the above infinite loop. Signed-off-by: Yuezhang Mo Signed-off-by: Namjae Jeon fs/exfat/dir.c | 12 ++++++++++++ fs/exfat/fatent.c | 10 ++++++++++ fs/exfat/namei.c | 5 +++++ fs/exfat/super.c | 32 +++++++++++++++++++++----------- 4 files changed, 48 insertions(+), 11 deletions(-) accumulated error probability: 0.00 culprit signature: 1f8ea861e31abe447375c950a634b88ea63f58023b67993027770c7cd6e241d4 parent signature: 2c497a99e065d81202376d960d4bb1c1e09d8f1c86b3357a7f1782690f139c7c revisions tested: 23, total time: 6h47m37.700265234s (build: 2h27m8.653411395s, test: 3h55m33.210118017s) first good commit: 99f9a97dce39ad413c39b92c90393bbd6778f3fd exfat: add cluster chain loop check for dir recipients (to): ["linkinjeon@kernel.org" "yuezhang.mo@sony.com"] recipients (cc): []