ci2 starts bisection 2026-08-16 19:05:38.260873209 +0000 UTC m=+155690.259111311 bisecting fixing commit since 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba building syzkaller on d6526ea3e6ad9081c902859bbb80f9f840377cb4 ensuring issue is reproducible on original commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 0c40f0072f1c458ddbac276c39d12c9630982e9eee53568efc25405290b9b112 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: crashed: INFO: task hung in sync_bdevs run #7: crashed: INFO: task hung in sync_bdevs run #8: crashed: INFO: task hung in sync_bdevs run #9: crashed: INFO: task hung in sync_bdevs run #10: crashed: INFO: task hung in sync_bdevs run #11: crashed: INFO: task hung in sync_bdevs run #12: crashed: INFO: task hung in sync_bdevs run #13: crashed: INFO: task hung in sync_bdevs run #14: crashed: INFO: task hung in sync_bdevs run #15: crashed: INFO: task hung in sync_bdevs run #16: crashed: INFO: task hung in sync_bdevs run #17: crashed: INFO: task hung in sync_bdevs run #18: crashed: INFO: task hung in sync_bdevs run #19: crashed: INFO: task hung in sync_bdevs representative crash: INFO: task hung in sync_bdevs, 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 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: eab0783b8bcc80ffa411234c02a3b70531d1ad96127dec18373f78ebb0e240da run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: crashed: INFO: task hung in sync_bdevs run #7: crashed: INFO: task hung in sync_bdevs run #8: crashed: INFO: task hung in sync_bdevs run #9: crashed: INFO: task hung in sync_bdevs representative crash: INFO: task hung in sync_bdevs, types: [HANG] unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 4 kconfig minimization: base=3829 full=7618 leaves diff=2130 split chunks (needed=false): <2130> split chunk #0 of len 2130 into 5 parts testing without sub-chunk 1/5 testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 6e4f0299d8e17b8e54bb208806d2c5c898f469eadf2a5c3e79492dc90634e53f run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 testing without sub-chunk 2/5 testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 315beecde005994fdbcb8f8a592ec189fc1891f328ce914b153eedf7959b6f9e run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: INFO: task hung in sync_bdevs run #2: crashed: INFO: task hung in sync_bdevs run #3: crashed: INFO: task hung in sync_bdevs run #4: crashed: INFO: task hung in sync_bdevs run #5: crashed: INFO: task hung in sync_bdevs run #6: crashed: INFO: task hung in sync_bdevs run #7: crashed: INFO: task hung in sync_bdevs run #8: crashed: INFO: task hung in sync_bdevs run #9: crashed: INFO: task hung in sync_bdevs representative crash: INFO: task hung in sync_bdevs, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: bb479a1a6010c3f69119b16d32e0880f17ac0dc65f5067a02312916ebb35337d all runs: crashed: INFO: task hung in sync_bdevs representative crash: INFO: task hung in sync_bdevs, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 7f28d3115f1ca7c6fa5db748b34af4a55855eec967110dfd3b7ce9cda70824d1 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: crashed: INFO: task hung in sync_bdevs run #3: crashed: INFO: task hung in sync_bdevs run #4: crashed: INFO: task hung in sync_bdevs run #5: crashed: INFO: task hung in sync_bdevs run #6: crashed: INFO: task hung in sync_bdevs run #7: crashed: INFO: task hung in sync_bdevs run #8: crashed: INFO: task hung in sync_bdevs run #9: crashed: INFO: task hung in sync_bdevs representative crash: INFO: task hung in sync_bdevs, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 testing commit 50cbba13faa294918f0e1a9cb2b0aba19f4e6fba gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: c680f6c31f631f113066daa0988ac4c0dd6d58aa68953214b6e7097b8575e00b run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: INFO: task hung in sync_bdevs run #4: crashed: INFO: task hung in sync_bdevs run #5: crashed: INFO: task hung in sync_bdevs run #6: crashed: INFO: task hung in sync_bdevs run #7: crashed: INFO: task hung in sync_bdevs run #8: crashed: INFO: task hung in sync_bdevs run #9: crashed: INFO: task hung in sync_bdevs representative crash: INFO: task hung in sync_bdevs, types: [HANG] the chunk can be dropped minimized to 426 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_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_THP_MIGRATION ASM_MODVERSIONS ASUS_TF103C_DOCK ASYNC_CORE ASYNC_MEMCPY ASYNC_PQ ASYNC_RAID6_RECOV ASYNC_TX_DMA ASYNC_XOR ATARI_PARTITION ATA_GENERIC ATA_OVER_ETH ATH10K ATH10K_CE 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 BATMAN_ADV_NC BCACHE BCMA BCMA_HOST_PCI_POSSIBLE BEFS_FS BFQ_CGROUP_DEBUG BFQ_GROUP_IOSCHED BFS_FS BIG_KEYS BLK_CGROUP_RWSTAT BLK_DEBUG_FS_ZONED BLK_DEV_BSGLIB BLK_DEV_INITRD BLK_DEV_INTEGRITY BLK_DEV_INTEGRITY_T10 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_ICQ BLK_INLINE_ENCRYPTION BLK_INLINE_ENCRYPTION_FALLBACK BLK_MQ_RDMA 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_VLAN_FILTERING BSD_DISKLABEL BSD_PROCESS_ACCT_V3 BT BTRFS_ASSERT BTRFS_FS BTRFS_FS_POSIX_ACL BTRFS_FS_REF_VERIFY BTT BT_6LOWPAN BT_ATH3K BT_BCM BT_BNEP BT_BNEP_MC_FILTER BT_BNEP_PROTO_FILTER BT_BREDR BT_CMTP BT_HCIBCM203X BT_HCIBFUSB BT_HCIBPA10X BT_HCIBTUSB BT_HCIBTUSB_AUTOSUSPEND BT_HCIBTUSB_BCM BT_HCIBTUSB_MTK 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_HS BT_INTEL BT_LE BT_LEDS BT_MSFTEXT BT_MTK BT_QCA BT_RFCOMM BT_RFCOMM_TTY BT_RTL 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_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_SLCAN CAN_UCAN CAN_VCAN CAN_VXCAN CAPI_TRACE 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 CLS_U32_MARK CLS_U32_PERF CMA CMA_SIZE_SEL_MBYTES 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 COMPAT_NETLINK_MESSAGES COUNTER CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRC4 CRC64 CRC64_ROCKSOFT CRC7 CRC8 CRC_ITU_T CRC_T10DIF CRYPTO_ADIANTUM CRYPTO_AEGIS128 CRYPTO_AEGIS128_AESNI_SSE2 CRYPTO_AES_NI_INTEL CRYPTO_AES_TI CRYPTO_ANSI_CPRNG CRYPTO_ANUBIS CRYPTO_ARC4 CRYPTO_ARCH_HAVE_LIB_BLAKE2S CRYPTO_ARCH_HAVE_LIB_CHACHA CRYPTO_ARCH_HAVE_LIB_CURVE25519 CRYPTO_ARCH_HAVE_LIB_POLY1305 CRYPTO_ARIA CRYPTO_ARIA_AESNI_AVX_X86_64 CRYPTO_BLAKE2B CRYPTO_BLAKE2S_X86 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_CHACHA20_X86_64 CRYPTO_CRC32 CRYPTO_CRC32C_INTEL CRYPTO_CRC32_PCLMUL CRYPTO_CRC64_ROCKSOFT CRYPTO_CRCT10DIF CRYPTO_CRCT10DIF_PCLMUL CRYPTO_CRYPTD CRYPTO_CTS CRYPTO_CURVE25519 CRYPTO_CURVE25519_X86 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_ECB CRYPTO_ECC CRYPTO_ECDH CRYPTO_ECRDSA CRYPTO_ENGINE CRYPTO_ESSIV CRYPTO_FCRYPT CRYPTO_GHASH_CLMUL_NI_INTEL CRYPTO_HCTR2 CRYPTO_KDF800108_CTR CRYPTO_KEYWRAP CRYPTO_KHAZAD CRYPTO_KPP CRYPTO_LIB_ARC4 CRYPTO_LIB_CHACHA CRYPTO_LIB_CHACHA20POLY1305 CRYPTO_LIB_CHACHA_GENERIC CRYPTO_LIB_CURVE25519 CRYPTO_LIB_CURVE25519_GENERIC CRYPTO_LIB_DES CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LRW CRYPTO_MICHAEL_MIC CRYPTO_NHPOLY1305 CRYPTO_NHPOLY1305_AVX2 CRYPTO_NHPOLY1305_SSE2 CRYPTO_PCBC CRYPTO_PCRYPT CRYPTO_POLY1305 CRYPTO_POLY1305_X86_64 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_SHA1_SSSE3 CRYPTO_SHA256_SSSE3 CRYPTO_SHA3 CRYPTO_SHA512_SSSE3 CRYPTO_SIMD CRYPTO_SM2 CRYPTO_SM3 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_VMAC CRYPTO_WP512 CRYPTO_XCBC CRYPTO_XCTR CRYPTO_XTS CRYPTO_XXHASH CUSE CYPRESS_FIRMWARE DAMON DAMON_DBGFS DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DCA DCB DEFAULT_PFIFO_FAST DMA_CMA FSCACHE FUSE_FS GPIOLIB HAMRADIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ ISDN ISDN_CAPI LIBNVDIMM MAC80211 MAC80211_LEDS MEDIA_SUPPORT MTD NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED PCCARD PCMCIA RFKILL SERIAL_DEV_BUS TLS TLS_DEVICE USB_GADGET USB_PHY VLAN_8021Q WANT_COMPAT_NETLINK_MESSAGES WEXT_CORE WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ATH] testing current HEAD e4f7d8be268ecf717f94ee2e242afa79ddeacaed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: f4e5750322b0717cc61be1349eeea552ace86508341ac66ec36e78b55852b3c0 all runs: crashed: INFO: task hung in sync_bdevs representative crash: INFO: task hung in sync_bdevs, types: [HANG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 2h12m58.442153554s (build: 42m29.259844292s, test: 1h20m18.332417419s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.182 crash: INFO: task hung in sync_bdevs INFO: task syz.2.17:2842 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.17 state:D stack:24896 pid:2842 ppid:2442 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5246 [inline] __schedule+0xfbd/0x1bd0 kernel/sched/core.c:6563 schedule+0xb9/0x180 kernel/sched/core.c:6639 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6698 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x548/0xae0 kernel/locking/mutex.c:747 sync_bdevs+0x190/0x2c0 block/bdev.c:1067 ksys_sync+0xbd/0x150 fs/sync.c:105 __ia32_sys_sync+0x5/0x10 fs/sync.c:113 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff4c336aef9 RSP: 002b:00007ff4c29ce028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007ff4c35d5fa0 RCX: 00007ff4c336aef9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ff4c35d5fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff4c35d6038 R14: 00007ff4c35d5fa0 R15: 00007fffd282fe78 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8666fa70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xef0 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffffffff86670290 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xef0 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffffffff8666f0e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #0: ffffffff8666f0e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #0: ffffffff8666f0e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6527 2 locks held by getty/944: #0: ffff88810c34c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1c/0x60 drivers/tty/tty_ldisc.c:244 #1: ffffc900000762f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x39d/0xf70 drivers/tty/n_tty.c:2198 1 lock held by syz.2.17/2842: #0: ffff88810e6cc4c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x190/0x2c0 block/bdev.c:1067 1 lock held by udevd/2843: #0: ffff88810e6cc4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xb4/0x8b0 block/bdev.c:828 1 lock held by udevd/2847: #0: ffff88810e2c74c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xb4/0x8b0 block/bdev.c:828 1 lock held by udevd/2848: #0: ffff88810f2b14c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xb4/0x8b0 block/bdev.c:828 1 lock held by syz.3.18/3247: #0: ffff88810e2c74c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x190/0x2c0 block/bdev.c:1067 1 lock held by udevd/3252: #0: ffff88810eab44c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xb4/0x8b0 block/bdev.c:828 1 lock held by syz.4.19/3650: #0: ffff88810eab44c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x190/0x2c0 block/bdev.c:1067 1 lock held by syz.5.20/4052: #0: ffff88810f2b14c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x190/0x2c0 block/bdev.c:1067 1 lock held by udevd/4056: #0: ffff88810f2b64c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xb4/0x8b0 block/bdev.c:828 1 lock held by syz.6.21/4456: #0: ffff88810f2b64c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x190/0x2c0 block/bdev.c:1067 1 lock held by udevd/4461: #0: ffff88810f2cb4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xb4/0x8b0 block/bdev.c:828 1 lock held by syz.7.22/4859: #0: ffff88810f2cb4c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x190/0x2c0 block/bdev.c:1067 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x106/0x19b lib/dump_stack.c:106 nmi_cpu_backtrace+0x252/0x360 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x151/0x360 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xb02/0xb40 kernel/hung_task.c:377 kthread+0x259/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 147 Comm: kworker/u4:3 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: bat_events batadv_nc_worker RIP: 0010:kasan_check_range+0x1b7/0x290 mm/kasan/generic.c:189 Code: 49 8d 5f 07 4d 85 ff 49 0f 49 df 48 83 e3 f8 49 29 df 74 0e 41 80 3b 00 75 69 49 ff c3 49 ff cf 75 f2 5b 41 5c 41 5e 41 5f 5d 45 84 ff 0f 85 91 00 00 00 41 f7 c7 00 ff 00 00 0f 85 89 00 00 RSP: 0018:ffffc90001297858 EFLAGS: 00000056 RAX: 0000000000000001 RBX: 000000000000002c RCX: ffffffff8136903a RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff88ea70e0 RBP: ffffc90001297a90 R08: ffffffff88ea70e7 R09: 1ffffffff11d4e1c R10: dffffc0000000000 R11: fffffbfff11d4e1d R12: ffff8881096d6190 R13: ffff8881096d5700 R14: 00000000cf7d9d3c R15: 000000007c09fca1 FS: 0000000000000000(0000) GS:ffff8881f6100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff11aa3b78 CR3: 0000000006425000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:72 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class kernel/locking/lockdep.c:228 [inline] __lock_acquire+0x138a/0x7c40 kernel/locking/lockdep.c:5060 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676 rcu_lock_acquire include/linux/rcupdate.h:350 [inline] rcu_read_lock include/linux/rcupdate.h:791 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0xdd/0x4e0 net/batman-adv/network-coding.c:719 process_one_work+0x7b6/0xeb0 kernel/workqueue.c:2292 worker_thread+0x8e3/0xfd0 kernel/workqueue.c:2439 kthread+0x259/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295