ci starts bisection 2025-07-23 20:47:38.19910632 +0000 UTC m=+44.713345679
bisecting fixing commit since 2014c95afecee3e76ca4a56956a936e23283f05b
building syzkaller on a21a8419b67b5ef8ebc3d6dd834d065e6860c41f
ensuring issue is reproducible on original commit 2014c95afecee3e76ca4a56956a936e23283f05b
testing commit 2014c95afecee3e76ca4a56956a936e23283f05b gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 8d99bd9eef5640e1f9a891d69903952910a0914f1b1b776b3d0fa40efeefd5dd
run #0: crashed: INFO: task hung in hugetlbfs_zero_partial_page
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: crashed: INFO: task hung in rmap_walk_file
representative crash: INFO: task hung in hugetlbfs_zero_partial_page, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit 2014c95afecee3e76ca4a56956a936e23283f05b gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: fecc5f147992cd86dc8ff2dc42a53734963c559f1d861e87ffaacdd9b589d1ef
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=4095 full=8264 leaves diff=2144
split chunks (needed=false): <2144>
split chunk #0 of len 2144 into 5 parts
testing without sub-chunk 1/5
disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed
testing commit 2014c95afecee3e76ca4a56956a936e23283f05b gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 10e2a0a5d4121f21a95abf9656ca4edca3292e4d1a633db946ff055a0ae1b1ab
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 2014c95afecee3e76ca4a56956a936e23283f05b gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
failed building 2014c95afecee3e76ca4a56956a936e23283f05b: ld.lld: error: undefined symbol: devm_drm_of_get_bridge
testing without sub-chunk 3/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 2014c95afecee3e76ca4a56956a936e23283f05b gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 4c636849f85085cc4cf275682d2d6aa4f594824b41f9ad7e894823f73e76de46
run #0: crashed: INFO: task hung in rmap_walk_file
run #1: crashed: INFO: task hung in rmap_walk_file
run #2: ignore: lost connection to test machine
run #3: crashed: INFO: task hung in rmap_walk_file
run #4: crashed: INFO: task hung in rmap_walk_file
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]
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 2014c95afecee3e76ca4a56956a936e23283f05b gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 3e76506af0fef4da774d1e7a828732c5ab78a1dfeec968789e268ec6dbb48c1a
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: OK
run #13: crashed: INFO: task hung in rmap_walk_file
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
testing without sub-chunk 5/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 2014c95afecee3e76ca4a56956a936e23283f05b gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: f3d57db52f2c6a4861bc34d782bfcff819df06674b1ef3cf74b935c0ffe406a4
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: OK
run #16: OK
run #17: crashed: INFO: task hung in rmap_walk_file
run #18: OK
run #19: OK
representative crash: INFO: task hung in rmap_walk_file, types: [HANG]
the chunk can be dropped
minimized to 429 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE 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_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_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_PHY GENERIC_PTDUMP 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 GVE HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_EISA 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_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_DCCP_DIAG 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 IPV6_TUNNEL IPV6_VTI IPVLAN IPVLAN_L3S IPVTAP IP_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS IP_MROUTE_MULTIPLE_TABLES IP_NF_ARPFILTER IP_NF_ARPTABLES IP_NF_ARP_MANGLE IP_NF_MATCH_AH IP_NF_MATCH_ECN IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_RAW IP_NF_SECURITY IP_NF_TARGET_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID IP_SCTP IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC IP_SET_BITMAP_PORT IP_SET_HASH_IP IP_SET_HASH_IPMAC IP_SET_HASH_IPMARK IP_SET_HASH_IPPORT IP_SET_HASH_IPPORTIP IP_SET_HASH_IPPORTNET IP_SET_HASH_MAC IP_SET_HASH_NET IP_SET_HASH_NETIFACE IP_SET_HASH_NETNET IP_SET_HASH_NETPORT IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE MAC802154 MCORE2 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 NFT_COMPAT NFT_COMPAT_ARP NFT_FWD_NETDEV NF_TABLES NF_TABLES_ARP NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TYPEC TYPEC_MUX_PI3USB30532 USB_LJCA USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE]
disabling configs for [locking atomic_sleep memleak ubsan bug_or_warning kasan], they are not needed
testing current HEAD 01a412d06bc5786eb4e44a6c8f0f4659bd4c9864
testing commit 01a412d06bc5786eb4e44a6c8f0f4659bd4c9864 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 7a31b7baa80f6b4923bbc6fc5081f837f9b09f6611a03dcb5d82c3bb4322a787
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: 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 (0.80 repro chance estimate)
revisions tested: 7, total time: 4h27m43.698886461s (build: 1h30m48.27517634s, test: 1h30m16.576491355s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'pull-ufs-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
crash: INFO: task hung in __rmap_walk_file
INFO: task syz.5.69:4019 blocked for more than 143 seconds.
Not tainted 6.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.69 state:D stack:13560 pid:4019 tgid:4018 ppid:2686 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x76d/0xc30 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6879
schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:6936
rwsem_down_read_slowpath+0x241/0x520 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x86/0xf0 kernel/locking/rwsem.c:1526
i_mmap_lock_read include/linux/fs.h:567 [inline]
__rmap_walk_file+0x9c/0x220 mm/rmap.c:2894
remove_migration_ptes mm/migrate.c:366 [inline]
unmap_and_move_huge_page mm/migrate.c:1459 [inline]
migrate_hugetlbs mm/migrate.c:1581 [inline]
migrate_pages+0x440/0xd60 mm/migrate.c:2011
do_mbind mm/mempolicy.c:1542 [inline]
kernel_mbind mm/mempolicy.c:1685 [inline]
__do_sys_mbind mm/mempolicy.c:1759 [inline]
__se_sys_mbind+0x5f2/0x6e0 mm/mempolicy.c:1755
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9c1878cda9
RSP: 002b:00007f9c19671038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed
RAX: ffffffffffffffda RBX: 00007f9c189a5fa0 RCX: 00007f9c1878cda9
RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000000020001000
RBP: 00007f9c1880e2a0 R08: 0000000000000040 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9c189a5fa0 R15: 00007ffe5d24ed68
INFO: task syz.5.69:4038 blocked for more than 143 seconds.
Not tainted 6.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.69 state:D stack:14080 pid:4038 tgid:4018 ppid:2686 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x76d/0xc30 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6879
io_schedule+0x3f/0x60 kernel/sched/core.c:7724
folio_wait_bit_common+0x1d9/0x390 mm/filemap.c:1317
__folio_lock mm/filemap.c:1675 [inline]
folio_lock include/linux/pagemap.h:1114 [inline]
__filemap_get_folio+0x6c/0x450 mm/filemap.c:1928
filemap_lock_folio include/linux/pagemap.h:785 [inline]
filemap_lock_hugetlb_folio include/linux/hugetlb.h:817 [inline]
hugetlbfs_zero_partial_page+0x37/0x130 fs/hugetlbfs/inode.c:658
hugetlbfs_punch_hole fs/hugetlbfs/inode.c:712 [inline]
hugetlbfs_fallocate+0x2dc/0x5e0 fs/hugetlbfs/inode.c:745
vfs_fallocate+0x1dc/0x200 fs/open.c:341
madvise_remove mm/madvise.c:1043 [inline]
madvise_vma_behavior mm/madvise.c:1274 [inline]
madvise_walk_vmas mm/madvise.c:1541 [inline]
madvise_do_behavior+0x678/0x1270 mm/madvise.c:1733
do_madvise+0x13e/0x1a0 mm/madvise.c:1826
__do_sys_madvise mm/madvise.c:1835 [inline]
__se_sys_madvise mm/madvise.c:1833 [inline]
__x64_sys_madvise+0x24/0x30 mm/madvise.c:1833
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9c1878cda9
RSP: 002b:00007f9c19650038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f9c189a6080 RCX: 00007f9c1878cda9
RDX: 0000000000000009 RSI: 0000000000600002 RDI: 0000000020000000
RBP: 00007f9c1880e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9c189a6080 R15: 00007ffe5d24ed68
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff835deb30 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff835deb30 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff835deb30 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6770
2 locks held by kworker/u8:2/39:
#0: ffff88810007c948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88810007c948 ((wq_completion)events_unbound){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3321
#1: ffffc9000014fe48 ((work_completion)(&sub_info->work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000014fe48 ((work_completion)(&sub_info->work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3321
2 locks held by getty/1653:
#0: ffff888103b5c8a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc900031032f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c3/0x6e0 drivers/tty/n_tty.c:2222
1 lock held by syz.5.69/4019:
#0: ffff888103ebb640 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: i_mmap_lock_read include/linux/fs.h:567 [inline]
#0: ffff888103ebb640 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: __rmap_walk_file+0x9c/0x220 mm/rmap.c:2894
3 locks held by syz.5.69/4038:
#0: ffff888103ae4418 (sb_writers#12){....}-{0:0}, at: vfs_fallocate+0x1c2/0x200 fs/open.c:340
#1: ffff888103ebb378 (&sb->s_type->i_mutex_key#19){....}-{3:3}, at: inode_lock include/linux/fs.h:869 [inline]
#1: ffff888103ebb378 (&sb->s_type->i_mutex_key#19){....}-{3:3}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:687 [inline]
#1: ffff888103ebb378 (&sb->s_type->i_mutex_key#19){....}-{3:3}, at: hugetlbfs_fallocate+0x1f2/0x5e0 fs/hugetlbfs/inode.c:745
#2: ffff888103ebb640 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:547 [inline]
#2: ffff888103ebb640 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:695 [inline]
#2: ffff888103ebb640 (&hugetlbfs_i_mmap_rwsem_key){....}-{3:3}, at: hugetlbfs_fallocate+0x24e/0x5e0 fs/hugetlbfs/inode.c:745
1 lock held by syz.6.35534/29513:
#0: ffffffff835dfb38 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#0: ffffffff835dfb38 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x179/0x620 kernel/rcu/tree_exp.h:998
1 lock held by syz.7.35536/29523:
#0: ffffffff835dfb38 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#0: ffffffff835dfb38 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x179/0x620 kernel/rcu/tree_exp.h:998
3 locks held by modprobe/29540:
#0: ffff888237c2b698 (&rq->__lock){....}-{2:2}, at: raw_spin_rq_lock_nested+0x20/0x70 kernel/sched/core.c:606
#1: ffff8881026e0018 (&sighand->siglock){....}-{2:2}, at: do_notify_parent+0x241/0x2e0 kernel/signal.c:2231
#2: ffff8881016e3238 (&sig->wait_chldexit){....}-{2:2}, at: __wake_up_common_lock kernel/sched/wait.c:105 [inline]
#2: ffff8881016e3238 (&sig->wait_chldexit){....}-{2:2}, at: __wake_up_sync_key+0x25/0xa0 kernel/sched/wait.c:173
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(none)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0xa2/0xf0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x109/0x170 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0x604/0x630 kernel/hung_task.c:470
kthread+0x200/0x230 kernel/kthread.c:464
ret_from_fork+0x9d/0x170 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 369 Comm: kworker/u8:4 Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(none)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:memcpy_orig+0xee/0x130 arch/x86/lib/memcpy_64.S:152
Code: 1b 4c 8b 06 4c 8b 4c 16 f8 4c 89 07 4c 89 4c 17 f8 e9 d6 03 01 00 66 0f 1f 44 00 00 83 fa 04 72 1b 8b 0e 44 8b 44 16 fc 89 0f <44> 89 44 17 fc c3 cc cc cc cc 0f 1f 84 00 00 00 00 00 83 ea 01 72
RSP: 0000:ffffc90001347cd8 EFLAGS: 00000046
RAX: 00002aaaaaaabbd6 RBX: ffffffff81263b00 RCX: 000000000000441f
RDX: 0000000000000004 RSI: ffffffff8435fc4f RDI: 00002aaaaaaabbd6
RBP: 0000000000000000 R08: 000000000000441f R09: 000000000000003b
R10: 0000000000000000 R11: ffffffff81263b00 R12: ffff88810006e558
R13: ffffffff8435fc4f R14: ffffffff83617c80 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff8882b38ea000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f05f5fcb0f6 CR3: 000000010006a000 CR4: 00000000003506f0
Call Trace:
__text_poke+0x250/0x3d0 arch/x86/kernel/alternative.c:2529
text_poke arch/x86/kernel/alternative.c:2590 [inline]
smp_text_poke_batch_finish+0x23d/0x3d0 arch/x86/kernel/alternative.c:2923
arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked kernel/jump_label.c:240 [inline]
static_key_disable+0x3f/0x60 kernel/jump_label.c:248
toggle_allocation_gate+0xcc/0x120 mm/kfence/core.c:855
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x2e7/0x5e0 kernel/workqueue.c:3321
worker_thread+0x20a/0x2f0 kernel/workqueue.c:3402
kthread+0x200/0x230 kernel/kthread.c:464
ret_from_fork+0x9d/0x170 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245