ci starts bisection 2025-11-24 12:22:07.729863674 +0000 UTC m=+47.980318339
bisecting fixing commit since 971199ad2a0f1b2fbe14af13369704aff2999988
building syzkaller on 7e2882b32698b70f3149aee00c41e3d2d941dca3
ensuring issue is reproducible on original commit 971199ad2a0f1b2fbe14af13369704aff2999988
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: e7a90c455538141621e2cfa784e13941156a2648f337383faa0e44560a5f6197
run #0: crashed: INFO: task hung in find_inode_fast
run #1: crashed: INFO: task hung in find_inode_fast
run #2: crashed: INFO: task hung in find_inode_fast
run #3: crashed: INFO: task hung in find_inode_fast
run #4: crashed: INFO: task hung in find_inode_fast
run #5: crashed: INFO: task hung in find_inode_fast
run #6: crashed: INFO: task hung in find_inode_fast
run #7: crashed: INFO: task hung in find_inode_fast
run #8: crashed: INFO: task hung in find_inode_fast
run #9: crashed: INFO: task hung in find_inode_fast
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: crashed: INFO: task hung in find_inode_fast
run #15: OK
run #16: OK
run #17: crashed: INFO: task hung in find_inode_fast
run #18: OK
run #19: OK
representative crash: INFO: task hung in find_inode_fast, 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 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 913ee7d09bad16ee357ace4249a087f6d954e899d2244948d0780f308e97ea6d
all runs: OK
false negative chance: 0.000
kconfig minimization: base=4116 full=8563 leaves diff=2159
split chunks (needed=false): <2159>
split chunk #0 of len 2159 into 5 parts
testing without sub-chunk 1/5
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 557007ae652b509aa443a0676f92969b510747fe7726adf024b9a6bf848aa058
run #0: crashed: INFO: task hung in find_inode_fast
run #1: crashed: INFO: task hung in find_inode_fast
run #2: crashed: INFO: task hung in find_inode_fast
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 find_inode_fast, types: [HANG]
testing without sub-chunk 2/5
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 7d64ceb283259ae603477f70e8162a77bf8c9f2da73579ba2239caf312e6c1ca
run #0: crashed: INFO: task hung in find_inode_fast
run #1: crashed: INFO: task hung in find_inode_fast
run #2: crashed: INFO: task hung in find_inode_fast
run #3: crashed: INFO: task hung in find_inode_fast
run #4: crashed: INFO: task hung in find_inode_fast
run #5: crashed: INFO: task hung in find_inode_fast
run #6: crashed: INFO: task hung in find_inode_fast
run #7: crashed: INFO: task hung in find_inode_fast
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 find_inode_fast, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: f3de73247c35302f314799dfa0f8f18472d367b538edc27805b50356e4d66df8
run #0: crashed: INFO: task hung in find_inode_fast
run #1: crashed: INFO: task hung in find_inode_fast
run #2: crashed: INFO: task hung in find_inode_fast
run #3: crashed: INFO: task hung in find_inode_fast
run #4: crashed: INFO: task hung in find_inode_fast
run #5: crashed: INFO: task hung in find_inode_fast
run #6: crashed: INFO: task hung in find_inode_fast
run #7: crashed: INFO: task hung in find_inode_fast
run #8: crashed: INFO: task hung in find_inode_fast
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 find_inode_fast, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: cb51671f26b863712f929a46088ebb96b40db933f3c82d6e27bd6228e226e4af
run #0: crashed: INFO: task hung in find_inode_fast
run #1: crashed: INFO: task hung in find_inode_fast
run #2: crashed: INFO: task hung in find_inode_fast
run #3: crashed: INFO: task hung in find_inode_fast
run #4: crashed: INFO: task hung in find_inode_fast
run #5: crashed: INFO: task hung in find_inode_fast
run #6: OK
run #7: OK
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 find_inode_fast, types: [HANG]
testing without sub-chunk 5/5
testing commit 971199ad2a0f1b2fbe14af13369704aff2999988 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 2e7a636f265b2f1889cc02e617c95cda0a4482d5935bc444c88b766a96c29dc2
run #0: crashed: INFO: task hung in find_inode_fast
run #1: crashed: INFO: task hung in find_inode_fast
run #2: crashed: INFO: task hung in find_inode_fast
run #3: crashed: INFO: task hung in find_inode_fast
run #4: OK
run #5: OK
run #6: OK
run #7: OK
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 find_inode_fast, types: [HANG]
minimized to 1295 configs; suspects: [6LOWPAN 6LOWPAN_GHC_EXT_HDR_DEST 6LOWPAN_GHC_EXT_HDR_FRAG 6LOWPAN_GHC_EXT_HDR_HOP 6LOWPAN_GHC_EXT_HDR_ROUTE 6LOWPAN_GHC_ICMPV6 6LOWPAN_GHC_UDP 6LOWPAN_NHC 6LOWPAN_NHC_DEST 6LOWPAN_NHC_FRAGMENT 6LOWPAN_NHC_HOP 6LOWPAN_NHC_IPV6 6LOWPAN_NHC_MOBILITY 6LOWPAN_NHC_ROUTING 6LOWPAN_NHC_UDP 6PACK 842_COMPRESS 842_DECOMPRESS 9P_FSCACHE 9P_FS_POSIX_ACL 9P_FS_SECURITY ACORN_PARTITION ACORN_PARTITION_ADFS ACORN_PARTITION_CUMANA ACORN_PARTITION_EESOX ACORN_PARTITION_ICS ACORN_PARTITION_POWERTEC ACORN_PARTITION_RISCIX ACPI_NFIT ACPI_NHLT ACPI_PLATFORM_PROFILE ADFS_FS AFFS_FS AFS_FS AFS_FSCACHE AF_KCM AF_RXRPC AF_RXRPC_IPV6 AIX_PARTITION AMD_SFH_HID AMIGA_PARTITION ANDROID_BINDERFS ANDROID_BINDER_IPC ANON_VMA_NAME APERTURE_HELPERS APPLE_MFI_FASTCHARGE AR5523 ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_ENABLE_THP_MIGRATION ARCH_HAS_USER_SHADOW_STACK ARCH_SUPPORTS_HUGE_PFNMAP ARCH_SUPPORTS_PMD_PFNMAP ARCH_SUPPORTS_PUD_PFNMAP ARCH_WANT_PMD_MKWRITE ASM_MODVERSIONS ASUS_TF103C_DOCK ASYNC_CORE ASYNC_MEMCPY ASYNC_PQ ASYNC_RAID6_RECOV ASYNC_TX_DMA ASYNC_XOR AS_AVX512 AS_GFNI AS_VAES AS_VPCLMULQDQ ATARI_PARTITION ATA_GENERIC ATA_OVER_ETH ATH10K ATH10K_CE ATH10K_LEDS ATH10K_PCI ATH10K_USB ATH11K ATH6KL ATH6KL_USB ATH9K ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_CHANNEL_CONTEXT ATH9K_COMMON ATH9K_COMMON_DEBUG ATH9K_COMMON_SPECTRAL ATH9K_DEBUGFS ATH9K_DYNACK ATH9K_HTC ATH9K_HTC_DEBUGFS ATH9K_HW ATH9K_PCI ATH9K_PCOEM ATH9K_RFKILL ATH_COMMON ATM ATM_BR2684 ATM_CLIP ATM_DRIVERS ATM_LANE ATM_MPOA ATM_TCP AUXILIARY_BUS AX25 AX25_DAMA_SLAVE AX88796B_PHY BAREUDP BATMAN_ADV BATMAN_ADV_BATMAN_V BATMAN_ADV_BLA BATMAN_ADV_DAT BATMAN_ADV_MCAST BCACHE BCMA BCMA_HOST_PCI_POSSIBLE BEFS_FS BFQ_CGROUP_DEBUG BFQ_GROUP_IOSCHED BFS_FS BIG_KEYS BLK_CGROUP_PUNT_BIO BLK_CGROUP_RWSTAT BLK_DEV_BSGLIB BLK_DEV_INITRD BLK_DEV_INTEGRITY BLK_DEV_NBD BLK_DEV_NULL_BLK BLK_DEV_NULL_BLK_FAULT_INJECTION BLK_DEV_NVME BLK_DEV_PMEM BLK_DEV_RAM BLK_DEV_RNBD BLK_DEV_RNBD_CLIENT BLK_DEV_THROTTLING BLK_DEV_ZONED BLK_ICQ BLK_INLINE_ENCRYPTION BLK_INLINE_ENCRYPTION_FALLBACK BLK_WBT BLK_WBT_MQ BONDING BOOT_VESA_SUPPORT BPF_EVENTS BPF_JIT BPF_JIT_ALWAYS_ON BPF_JIT_DEFAULT_ON BPF_LSM BPF_PRELOAD BPF_PRELOAD_UMD BPF_SYSCALL BPQETHER BRIDGE BRIDGE_CFM BRIDGE_EBT_802_3 BRIDGE_EBT_AMONG BRIDGE_EBT_ARP BRIDGE_EBT_ARPREPLY BRIDGE_EBT_BROUTE BRIDGE_EBT_DNAT BRIDGE_EBT_IP BRIDGE_EBT_IP6 BRIDGE_EBT_LIMIT BRIDGE_EBT_LOG BRIDGE_EBT_MARK BRIDGE_EBT_MARK_T BRIDGE_EBT_NFLOG BRIDGE_EBT_PKTTYPE BRIDGE_EBT_REDIRECT BRIDGE_EBT_SNAT BRIDGE_EBT_STP BRIDGE_EBT_T_FILTER BRIDGE_EBT_T_NAT BRIDGE_EBT_VLAN BRIDGE_IGMP_SNOOPING BRIDGE_MRP BRIDGE_NF_EBTABLES BRIDGE_NF_EBTABLES_LEGACY BRIDGE_VLAN_FILTERING BSD_DISKLABEL BSD_PROCESS_ACCT_V3 BT BTRFS_ASSERT BTRFS_FS BTRFS_FS_POSIX_ACL BTT BT_6LOWPAN BT_ATH3K BT_BCM BT_BNEP BT_BNEP_MC_FILTER BT_BNEP_PROTO_FILTER BT_BREDR BT_HCIBCM203X BT_HCIBFUSB BT_HCIBPA10X BT_HCIBTUSB BT_HCIBTUSB_AUTOSUSPEND BT_HCIBTUSB_BCM BT_HCIBTUSB_MTK BT_HCIBTUSB_POLL_SYNC BT_HCIBTUSB_RTL BT_HCIUART BT_HCIUART_3WIRE BT_HCIUART_AG6XX BT_HCIUART_BCSP BT_HCIUART_H4 BT_HCIUART_LL BT_HCIUART_MRVL BT_HCIUART_QCA BT_HCIUART_SERDEV BT_HCIVHCI BT_HIDP BT_INTEL BT_LE BT_LEDS BT_LE_L2CAP_ECRED BT_MRVL BT_MRVL_SDIO BT_MSFTEXT BT_MTK BT_MTKSDIO BT_MTKUART BT_QCA BT_RFCOMM BT_RFCOMM_TTY BT_RTL BXT_WC_PMIC_OPREGION CACHEFILES CAIF CAIF_DEBUG CAIF_DRIVERS CAIF_NETDEV CAIF_TTY CAIF_USB CAIF_VIRTIO CAN CAN_8DEV_USB CAN_BCM CAN_CALC_BITTIMING CAN_DEV CAN_EMS_USB CAN_ESD_USB CAN_ETAS_ES58X CAN_F81604 CAN_GS_USB CAN_GW CAN_IFI_CANFD CAN_ISOTP CAN_J1939 CAN_KVASER_USB CAN_MCBA_USB CAN_NETLINK CAN_PEAK_USB CAN_RAW CAN_RX_OFFLOAD CAN_SLCAN CAN_UCAN CAN_VCAN CAN_VXCAN CARDBUS CARL9170 CARL9170_HWRNG CARL9170_LEDS CARL9170_WPC CEC_CORE CEPH_FS CEPH_FSCACHE CEPH_FS_POSIX_ACL CEPH_LIB CEPH_LIB_USE_DNS_RESOLVER CFG80211 CFG80211_CRDA_SUPPORT CFG80211_DEBUGFS CFG80211_DEFAULT_PS CFG80211_REQUIRE_SIGNED_REGDB CFG80211_USE_KERNEL_REGDB_KEYS CFG80211_WEXT CFS_BANDWIDTH CHARGER_ISP1704 CHR_DEV_ST CIFS CIFS_ALLOW_INSECURE_LEGACY CIFS_DEBUG CIFS_DFS_UPCALL CIFS_FSCACHE CIFS_POSIX CIFS_SMB_DIRECT CIFS_SWN_UPCALL CIFS_UPCALL CIFS_XATTR CLOSURES CLS_U32_MARK CLS_U32_PERF CMA CMA_SIZE_SEL_MAX CMDLINE_PARTITION COMEDI COMEDI_8254 COMEDI_8255 COMEDI_8255_PCI COMEDI_8255_SA COMEDI_ADL_PCI9118 COMEDI_ADQ12B COMEDI_AIO_AIO12_8 COMEDI_AIO_IIRO_16 COMEDI_AMPLC_DIO200 COMEDI_AMPLC_DIO200_ISA COMEDI_AMPLC_PC236 COMEDI_AMPLC_PC236_ISA COMEDI_AMPLC_PC263_ISA COMEDI_BOND COMEDI_C6XDIGIO COMEDI_DAC02 COMEDI_DAS08 COMEDI_DAS08_ISA COMEDI_DAS16M1 COMEDI_DAS1800 COMEDI_DAS6402 COMEDI_DAS800 COMEDI_DMM32AT COMEDI_DT2801 COMEDI_DT2811 COMEDI_DT2814 COMEDI_DT2815 COMEDI_DT2817 COMEDI_DT282X COMEDI_DT9812 COMEDI_FL512 COMEDI_ISADMA COMEDI_ISA_DRIVERS COMEDI_KCOMEDILIB COMEDI_MISC_DRIVERS COMEDI_MPC624 COMEDI_MULTIQ3 COMEDI_NI_ATMIO16D COMEDI_NI_AT_A2150 COMEDI_NI_AT_AO COMEDI_NI_DAQ_700_CS COMEDI_NI_LABPC COMEDI_NI_LABPC_CS COMEDI_NI_LABPC_ISA COMEDI_NI_LABPC_ISADMA COMEDI_NI_LABPC_PCI COMEDI_NI_USB6501 COMEDI_PARPORT COMEDI_PCI_DRIVERS COMEDI_PCL711 COMEDI_PCL724 COMEDI_PCL726 COMEDI_PCL730 COMEDI_PCL812 COMEDI_PCL816 COMEDI_PCL818 COMEDI_PCM3724 COMEDI_PCMAD COMEDI_PCMCIA_DRIVERS COMEDI_PCMDA12 COMEDI_PCMMIO COMEDI_PCMUIO COMEDI_RTI800 COMEDI_RTI802 COMEDI_S526 COMEDI_TEST COMEDI_USBDUX COMEDI_USBDUXFAST COMEDI_USBDUXSIGMA COMEDI_USB_DRIVERS COMEDI_VMK80XX COMMON_CLK COMPAT_NETLINK_MESSAGES CONTIG_ALLOC COUNTER CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRC64 CRC64_ARCH CRC8 CRC_CCITT CRC_ITU_T CRC_T10DIF CRC_T10DIF_ARCH CRYPTO_842 CRYPTO_ADIANTUM CRYPTO_AEGIS128 CRYPTO_AEGIS128_AESNI_SSE2 CRYPTO_AES_NI_INTEL CRYPTO_AES_TI CRYPTO_ANSI_CPRNG CRYPTO_ANUBIS CRYPTO_ARC4 CRYPTO_ARIA CRYPTO_ARIA_AESNI_AVX_X86_64 CRYPTO_BLAKE2B CRYPTO_BLOWFISH CRYPTO_BLOWFISH_COMMON CRYPTO_BLOWFISH_X86_64 CRYPTO_CAMELLIA CRYPTO_CAMELLIA_AESNI_AVX2_X86_64 CRYPTO_CAMELLIA_AESNI_AVX_X86_64 CRYPTO_CAMELLIA_X86_64 CRYPTO_CAST5 CRYPTO_CAST5_AVX_X86_64 CRYPTO_CAST6 CRYPTO_CAST6_AVX_X86_64 CRYPTO_CAST_COMMON CRYPTO_CHACHA20 CRYPTO_CHACHA20POLY1305 CRYPTO_CRC32C CRYPTO_CRYPTD CRYPTO_CTS CRYPTO_DEFLATE CRYPTO_DES CRYPTO_DES3_EDE_X86_64 CRYPTO_DEV_CCP CRYPTO_DEV_CCP_DD CRYPTO_DEV_PADLOCK CRYPTO_DEV_PADLOCK_AES CRYPTO_DEV_PADLOCK_SHA CRYPTO_DEV_QAT CRYPTO_DEV_QAT_C3XXX CRYPTO_DEV_QAT_C3XXXVF CRYPTO_DEV_QAT_C62X CRYPTO_DEV_QAT_C62XVF CRYPTO_DEV_QAT_DH895xCC CRYPTO_DEV_QAT_DH895xCCVF CRYPTO_DEV_VIRTIO CRYPTO_DH CRYPTO_DRBG_CTR CRYPTO_DRBG_HASH CRYPTO_ECDH CRYPTO_ECRDSA CRYPTO_ENGINE CRYPTO_ESSIV CRYPTO_FCRYPT CRYPTO_GHASH_CLMUL_NI_INTEL CRYPTO_HCTR2 CRYPTO_KDF800108_CTR CRYPTO_KHAZAD CRYPTO_KPP CRYPTO_KRB5 CRYPTO_KRB5ENC CRYPTO_LIB_ARC4 CRYPTO_LIB_CHACHA CRYPTO_LIB_CHACHA20POLY1305 CRYPTO_LIB_CHACHA_ARCH CRYPTO_LIB_CURVE25519 CRYPTO_LIB_CURVE25519_ARCH CRYPTO_LIB_CURVE25519_GENERIC CRYPTO_LIB_DES CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_ARCH CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LIB_SM3 CRYPTO_LRW CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_MICHAEL_MIC CRYPTO_NHPOLY1305 CRYPTO_NHPOLY1305_AVX2 CRYPTO_NHPOLY1305_SSE2 CRYPTO_PCBC CRYPTO_PCRYPT CRYPTO_POLYVAL CRYPTO_POLYVAL_CLMUL_NI CRYPTO_RMD160 CRYPTO_SEED CRYPTO_SERPENT CRYPTO_SERPENT_AVX2_X86_64 CRYPTO_SERPENT_AVX_X86_64 CRYPTO_SERPENT_SSE2_X86_64 CRYPTO_SM3_AVX_X86_64 CRYPTO_SM4 CRYPTO_SM4_AESNI_AVX2_X86_64 CRYPTO_SM4_AESNI_AVX_X86_64 CRYPTO_SM4_GENERIC CRYPTO_STREEBOG CRYPTO_TEA CRYPTO_TWOFISH CRYPTO_TWOFISH_AVX_X86_64 CRYPTO_TWOFISH_COMMON CRYPTO_TWOFISH_X86_64 CRYPTO_TWOFISH_X86_64_3WAY CRYPTO_USER CRYPTO_USER_API CRYPTO_USER_API_AEAD CRYPTO_USER_API_ENABLE_OBSOLETE CRYPTO_USER_API_HASH CRYPTO_USER_API_RNG CRYPTO_USER_API_SKCIPHER CRYPTO_WP512 CRYPTO_XCBC CRYPTO_XCTR CRYPTO_XTS CRYPTO_XXHASH CRYPTO_ZSTD CUSE CYPRESS_FIRMWARE DAMON DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCA DCB DEBUG_VFS DEFAULT_CODEL DEVICE_MIGRATION DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DIBS DIBS_LO DLM DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_ENGINE_RAID DRM DVB_CORE ENCRYPTED_KEYS EXTCON FSCACHE FUSE_FS GENDWARFKSYMS GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO HID_NVIDIA_SHIELD HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_STEAM HID_THRUSTMASTER HID_ZEROPLUS I2C_MUX IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_RTRS_CLIENT INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IOMMUFD IOSCHED_BFQ IP_SCTP IRQ_REMAP ISA_BUS KVM KVM_INTEL L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MAC80211_DEBUGFS MAC80211_LEDS MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_COMMON_OPTIONS MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MFD_VIPERBOARD MMC MODVERSIONS MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NETFILTER_XTABLES_LEGACY NET_CLS_U32 NET_IPGRE NET_IPGRE_DEMUX NET_SCH_DEFAULT NFS_V4_1 NF_CONNTRACK_SNMP NF_CT_PROTO_SCTP NF_CT_PROTO_UDPLITE NF_DUP_IPV4 NF_DUP_IPV6 NF_DUP_NETDEV NF_FLOW_TABLE NF_FLOW_TABLE_INET NF_NAT_AMANDA NF_NAT_H323 NF_NAT_OVS NF_NAT_PPTP NF_NAT_REDIRECT NF_NAT_SNMP_BASIC NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_NETDEV NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NINTENDO_FF NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NLS_UCS2_UTILS NOP_USB_XCEIV 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 OPTEE_STATIC_PROTMEM_POOL 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 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testing current HEAD ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d
testing commit ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: e59198fb08087945b8182d13a06c18942213afce5645d53b34826e0d9e6987c3
run #0: crashed: INFO: task hung in find_inode_fast
run #1: crashed: INFO: task hung in find_inode_fast
run #2: crashed: INFO: task hung in corrupted
run #3: crashed: INFO: task hung in find_inode_fast
run #4: crashed: INFO: task hung in find_inode_fast
run #5: crashed: INFO: task hung in find_inode_fast
run #6: crashed: INFO: task hung in find_inode_fast
run #7: OK
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 find_inode_fast, types: [HANG]
crash still not fixed/happens on the oldest tested release
reproducer is flaky (0.45 repro chance estimate)
revisions tested: 8, total time: 4h29m50.00455631s (build: 2h19m1.742802188s, test: 1h41m31.650704635s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.18-rc7
crash: INFO: task hung in find_inode_fast
INFO: task syz.2.62:5739 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.62 state:D stack:24552 pid:5739 tgid:5738 ppid:4738 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1764/0x4c70 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
__wait_on_freeing_inode+0x17a/0x260 fs/inode.c:2506
find_inode_fast+0x260/0x310 fs/inode.c:1070
iget_locked+0x98/0x500 fs/inode.c:1433
__ext4_iget+0x150/0x3dc0 fs/ext4/inode.c:5210
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1545 [inline]
ext4_xattr_inode_lookup_create+0x3f1/0x1770 fs/ext4/xattr.c:1584
ext4_xattr_ibody_set+0x1b4/0x660 fs/ext4/xattr.c:2263
ext4_xattr_set_handle+0x956/0xf70 fs/ext4/xattr.c:2440
ext4_xattr_set+0x207/0x2c0 fs/ext4/xattr.c:2554
__vfs_setxattr+0x353/0x390 fs/xattr.c:200
__vfs_setxattr_noperm+0x109/0x520 fs/xattr.c:234
vfs_setxattr+0x16e/0x290 fs/xattr.c:321
do_setxattr fs/xattr.c:636 [inline]
filename_setxattr+0x24b/0x510 fs/xattr.c:665
path_setxattrat+0x22d/0x2a0 fs/xattr.c:713
__do_sys_setxattr fs/xattr.c:747 [inline]
__se_sys_setxattr fs/xattr.c:743 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:743
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbddfb8eec9
RSP: 002b:00007fbddf1fe038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007fbddfde5fa0 RCX: 00007fbddfb8eec9
RDX: 0000200000001400 RSI: 00002000000001c0 RDI: 0000200000000380
RBP: 00007fbddfc11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000835 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbddfde6038 R14: 00007fbddfde5fa0 R15: 00007fffe5a33248
INFO: task syz.2.62:5752 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.62 state:D stack:26088 pid:5752 tgid:5738 ppid:4738 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1764/0x4c70 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
mb_cache_entry_wait_unused+0x16d/0x200 fs/mbcache.c:148
ext4_evict_ea_inode+0x15e/0x2a0 fs/ext4/xattr.c:481
ext4_evict_inode+0xf1/0xc10 fs/ext4/inode.c:183
evict+0x449/0x850 fs/inode.c:810
ext4_xattr_ibody_set+0x370/0x660 fs/ext4/xattr.c:2281
ext4_xattr_set_handle+0x956/0xf70 fs/ext4/xattr.c:2440
ext4_xattr_set+0x207/0x2c0 fs/ext4/xattr.c:2554
__vfs_setxattr+0x353/0x390 fs/xattr.c:200
__vfs_setxattr_noperm+0x109/0x520 fs/xattr.c:234
vfs_setxattr+0x16e/0x290 fs/xattr.c:321
do_setxattr fs/xattr.c:636 [inline]
filename_setxattr+0x24b/0x510 fs/xattr.c:665
path_setxattrat+0x22d/0x2a0 fs/xattr.c:713
__do_sys_setxattr fs/xattr.c:747 [inline]
__se_sys_setxattr fs/xattr.c:743 [inline]
__x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:743
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbddfb8eec9
RSP: 002b:00007fbddf1dd038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007fbddfde6090 RCX: 00007fbddfb8eec9
RDX: 0000200000001400 RSI: 00002000000001c0 RDI: 0000200000000200
RBP: 00007fbddfc11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000835 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbddfde6128 R14: 00007fbddfde6090 R15: 00007fffe5a33248
Showing all locks held in the system:
1 lock held by ksoftirqd/0/15:
1 lock held by khungtaskd/31:
#0: ffffffff8aac23e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8aac23e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8aac23e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/4113:
#0: ffff8880283880a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x60 drivers/tty/tty_ldisc.c:243
#1: ffffc900027fb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3a9/0xf80 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/4734:
1 lock held by syz-executor/4735:
#0: ffffffff8aac7e78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#0: ffffffff8aac7e78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:957
1 lock held by syz-executor/4737:
#0: ffff88806940e0e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88806940e0e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88806940e0e0 (&type->s_umount_key#31){++++}-{4:4}, at: deactivate_super+0x5b/0x80 fs/super.c:505
1 lock held by udevd/5553:
#0: ffff8880b9039898 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:638
3 locks held by syz.2.62/5739:
#0: ffff888062262408 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3c/0x80 fs/namespace.c:499
#1: ffff88806c8162e0 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
#1: ffff88806c8162e0 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: vfs_setxattr+0x146/0x290 fs/xattr.c:320
#2: ffff88806c815fc8 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
#2: ffff88806c815fc8 (&ei->xattr_sem){++++}-{4:4}, at: ext4_xattr_set_handle+0x120/0xf70 fs/ext4/xattr.c:2367
3 locks held by syz.2.62/5752:
#0: ffff888062262408 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3c/0x80 fs/namespace.c:499
#1: ffff88806ca1e2e0 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
#1: ffff88806ca1e2e0 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: vfs_setxattr+0x146/0x290 fs/xattr.c:320
#2: ffff88806ca1dfc8 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
#2: ffff88806ca1dfc8 (&ei->xattr_sem){++++}-{4:4}, at: ext4_xattr_set_handle+0x120/0xf70 fs/ext4/xattr.c:2367
1 lock held by udevd/9608:
3 locks held by syz.7.1968/13108:
=============================================
NMI backtrace for cpu 0
CPU: 0 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+0xfc/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace+0x22f/0x2e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x102/0x210 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0xaea/0xb30 kernel/hung_task.c:495
kthread+0x600/0x770 kernel/kthread.c:463
ret_from_fork+0x351/0x600 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:__netif_receive_skb_core+0x784/0x3710 net/core/dev.c:5918
Code: e8 61 c6 f3 fa 4d 8b 75 00 b8 98 01 00 00 49 01 c6 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 3f c6 f3 fa 4d 8b 3e <4d> 39 f7 0f 85 bf 00 00 00 0f 1f 44 00 00 4c 8b b4 24 00 02 00 00
RSP: 0018:ffffc90000a08820 EFLAGS: 00000246
RAX: 1ffff1100d21bc33 RBX: ffff888067752500 RCX: 08d6841176c36600
RDX: 0000000000000000 RSI: ffffffff8a5c6f7b RDI: ffffffff88d7fc60
RBP: ffffc90000a08a88 R08: ffffffff8be53a77 R09: 1ffffffff17ca74e
R10: dffffc0000000000 R11: fffffbfff17ca74f R12: dffffc0000000000
R13: ffff888067752510 R14: ffff8880690de198 R15: ffff8880690de198
FS: 0000000000000000(0000) GS:ffff88812b4f1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64ab972000 CR3: 0000000077cdd000 CR4: 0000000000350ef0
Call Trace:
__netif_receive_skb_one_core net/core/dev.c:6077 [inline]
__netif_receive_skb+0x68/0x300 net/core/dev.c:6192
process_backlog+0x8e8/0x1080 net/core/dev.c:6544
__napi_poll+0x93/0x2c0 net/core/dev.c:7594
napi_poll net/core/dev.c:7657 [inline]
net_rx_action+0x586/0xbd0 net/core/dev.c:7784
handle_softirqs+0x277/0x860 kernel/softirq.c:622
do_softirq+0xec/0x180 kernel/softirq.c:523
__local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:450
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:936 [inline]
__dev_queue_xmit+0xf58/0x3080 net/core/dev.c:4790
dev_queue_xmit include/linux/netdevice.h:3365 [inline]
batadv_send_skb_packet+0x3b2/0x620 net/batman-adv/send.c:100
batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:391 [inline]
batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:419 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x2bb/0x6b0 net/batman-adv/bat_iv_ogm.c:1697
process_one_work kernel/workqueue.c:3263 [inline]
process_scheduled_works+0x9f8/0x13f0 kernel/workqueue.c:3346
worker_thread+0x772/0xba0 kernel/workqueue.c:3427
kthread+0x600/0x770 kernel/kthread.c:463
ret_from_fork+0x351/0x600 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245