ci starts bisection 2024-12-04 22:36:19.283383887 +0000 UTC m=+79599.998533387 bisecting fixing commit since ee3f96b164688dae21e2466a57f2e806b64e8a37 building syzkaller on f8902b5747fbe3d5b860bd782eec63fc9c7da6e7 ensuring issue is reproducible on original commit ee3f96b164688dae21e2466a57f2e806b64e8a37 testing commit ee3f96b164688dae21e2466a57f2e806b64e8a37 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a4c57bf26a5ceb5f34b73b0e5f87055fa6c9bc09aba365de981d149d42e43569 run #0: crashed: INFO: task hung in blkdev_put run #1: crashed: INFO: task hung in blkdev_put run #2: crashed: INFO: task hung in blkdev_put run #3: crashed: INFO: task hung in blkdev_put run #4: crashed: INFO: task hung in blkdev_put run #5: crashed: INFO: task hung in blkdev_put run #6: crashed: INFO: task hung in blkdev_put run #7: crashed: INFO: task hung in blkdev_put run #8: crashed: INFO: task hung in blkdev_put run #9: crashed: INFO: task hung in blkdev_put run #10: crashed: INFO: task hung in blkdev_put run #11: crashed: INFO: task hung in blkdev_get_by_dev run #12: crashed: INFO: task hung in blkdev_put run #13: crashed: INFO: task hung in blkdev_put run #14: crashed: INFO: task hung in blkdev_put run #15: crashed: INFO: task hung in blkdev_put run #16: crashed: INFO: task hung in blkdev_put run #17: crashed: INFO: task hung in blkdev_put run #18: crashed: INFO: task hung in blkdev_put run #19: crashed: INFO: task hung in blkdev_put representative crash: INFO: task hung in blkdev_put, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit ee3f96b164688dae21e2466a57f2e806b64e8a37 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1b205e4320065efbb474a47e8e25ba6e34192f44005ab48768817ecb9d6b9f01 run #0: crashed: INFO: task hung in blkdev_put run #1: crashed: INFO: task hung in blkdev_put run #2: crashed: INFO: task hung in blkdev_put run #3: crashed: INFO: task hung in blkdev_put run #4: crashed: INFO: task hung in blkdev_put run #5: crashed: INFO: task hung in blkdev_get_by_dev run #6: crashed: INFO: task hung in blkdev_put run #7: crashed: INFO: task hung in blkdev_get_by_dev run #8: crashed: INFO: task hung in blkdev_put run #9: crashed: INFO: task hung in blkdev_put representative crash: INFO: task hung in blkdev_put, types: [HANG] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=4045 full=7580 leaves diff=2002 split chunks (needed=false): <2002> split chunk #0 of len 2002 into 5 parts testing without sub-chunk 1/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit ee3f96b164688dae21e2466a57f2e806b64e8a37 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c2ac08dfbdc12b544d4be7ee617ed0234e5b86ad11526e8c30337305ff4ca0a1 all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit ee3f96b164688dae21e2466a57f2e806b64e8a37 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 66759278e125541514b48d78f985107217bda40842c94a3a4071607352bf1686 run #0: crashed: INFO: task hung in blkdev_get_by_dev run #1: crashed: INFO: task hung in blkdev_put run #2: crashed: INFO: task hung in blkdev_put run #3: crashed: INFO: task hung in blkdev_put run #4: crashed: INFO: task hung in blkdev_put run #5: crashed: INFO: task hung in blkdev_put run #6: crashed: INFO: task hung in blkdev_put run #7: crashed: INFO: task hung in blkdev_put run #8: crashed: INFO: task hung in blkdev_put run #9: crashed: INFO: task hung in blkdev_put representative crash: INFO: task hung in blkdev_get_by_dev, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit ee3f96b164688dae21e2466a57f2e806b64e8a37 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7eac0f33b720f1ef1472fff8f5fe78128a9fa484fb1ce8f0ee69f87fa144171e run #0: crashed: INFO: task hung in blkdev_put run #1: crashed: INFO: task hung in blkdev_get_by_dev run #2: crashed: INFO: task hung in blkdev_get_by_dev run #3: crashed: INFO: task hung in blkdev_put run #4: crashed: INFO: task hung in blkdev_get_by_dev run #5: crashed: INFO: task hung in blkdev_put run #6: crashed: INFO: task hung in blkdev_put run #7: crashed: INFO: task hung in blkdev_put run #8: crashed: INFO: task hung in blkdev_put run #9: crashed: INFO: task hung in blkdev_put representative crash: INFO: task hung in blkdev_put, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit ee3f96b164688dae21e2466a57f2e806b64e8a37 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1553a2dc4b4ec0b49beeb1b4c03903b7b53c0ad25ddcb1e16963b4250f0dc220 run #0: crashed: INFO: task hung in blkdev_put run #1: crashed: INFO: task hung in blkdev_get_by_dev run #2: crashed: INFO: task hung in blkdev_get_by_dev run #3: crashed: INFO: task hung in blkdev_get_by_dev run #4: crashed: INFO: task hung in blkdev_put run #5: crashed: INFO: task hung in blkdev_put run #6: crashed: INFO: task hung in blkdev_put run #7: crashed: INFO: task hung in blkdev_put run #8: crashed: INFO: task hung in blkdev_put run #9: crashed: INFO: task hung in blkdev_put representative crash: INFO: task hung in blkdev_put, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed testing commit ee3f96b164688dae21e2466a57f2e806b64e8a37 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6072cd48a5fcb5a97f1da72157b5863de427c17531aa2adc273b3639fb1ac3d2 run #0: crashed: INFO: task hung in blkdev_get_by_dev run #1: crashed: INFO: task hung in blkdev_get_by_dev run #2: crashed: INFO: task hung in blkdev_put run #3: crashed: INFO: task hung in blkdev_put run #4: crashed: INFO: task hung in blkdev_put run #5: crashed: INFO: task hung in blkdev_get_by_dev run #6: crashed: INFO: task hung in blkdev_put run #7: crashed: INFO: task hung in blkdev_get_by_dev run #8: crashed: INFO: task hung in blkdev_put run #9: crashed: INFO: task hung in blkdev_put representative crash: INFO: task hung in blkdev_get_by_dev, types: [HANG] the chunk can be dropped minimized to 401 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 AMIGA_PARTITION ANDROID_BINDERFS ANDROID_BINDER_IPC ANON_VMA_NAME APERTURE_HELPERS AR5523 ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_ENABLE_THP_MIGRATION ARCH_USES_PG_UNCACHED ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP ASM_MODVERSIONS ASYNC_CORE ASYNC_MEMCPY ASYNC_PQ ASYNC_RAID6_RECOV ASYNC_TX_DMA ASYNC_XOR AS_HAS_NON_CONST_LEB128 AS_IS_GNU 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_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 AUTOFS4_FS AUXILIARY_BUS AX25 AX25_DAMA_SLAVE AX88796B_PHY BAREUDP BASE_FULL 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_FD 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_DEV_ZONED BLK_ICQ BLK_INLINE_ENCRYPTION BLK_INLINE_ENCRYPTION_FALLBACK BLK_MQ_RDMA BLK_WBT BLK_WBT_MQ BLOCK_COMPAT BONDING BOOT_VESA_SUPPORT BPF_EVENTS BPF_JIT BPF_JIT_ALWAYS_ON BPF_JIT_DEFAULT_ON BPF_LSM BPF_PRELOAD BPF_PRELOAD_UMD BPF_STREAM_PARSER 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_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_HS BT_INTEL BT_LE BT_LEDS BT_LE_L2CAP_ECRED 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_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_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 CGROUP_BPF CHARGER_BQ24190 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_DT9812 COMEDI_NI_USB6501 COMEDI_USBDUX COMEDI_USBDUXFAST COMEDI_USBDUXSIGMA COMEDI_USB_DRIVERS COMEDI_VMK80XX COMPAT_NETLINK_MESSAGES COUNTER CPU_IBPB_ENTRY CPU_IBRS_ENTRY CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRASH_CORE 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_CFB 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_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_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_CURVE25519 CRYPTO_LIB_CURVE25519_GENERIC CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LRW CRYPTO_NHPOLY1305 CRYPTO_NHPOLY1305_AVX2 CRYPTO_NHPOLY1305_SSE2 CRYPTO_OFB 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_SHA512_SSSE3 CRYPTO_SIMD CRYPTO_SM2 CRYPTO_SM3_AVX_X86_64 CRYPTO_SM4_AESNI_AVX2_X86_64 CRYPTO_SM4_AESNI_AVX_X86_64 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_XCTR CRYPTO_XXHASH CUSE CYPRESS_FIRMWARE DAMON DAMON_DBGFS DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCB DEBUG_CREDENTIALS DEFAULT_PFIFO_FAST DEVICE_MIGRATION DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_OPS 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_BOCHS DRM_BUDDY DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_DP_AUX_BUS ENCRYPTED_KEYS EXTCON FSCACHE FUSE_FS GPIOLIB HAMRADIO HID_DRAGONRISE IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ ISDN ISDN_CAPI LIBNVDIMM MAC80211 MAC80211_LEDS MEDIA_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MTD NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED RFKILL SERIAL_DEV_BUS SPECULATION_MITIGATIONS TLS TLS_DEVICE TRANSPARENT_HUGEPAGE TRUSTED_KEYS USB_GADGET USB_PHY VLAN_8021Q WANT_COMPAT_NETLINK_MESSAGES WEXT_CORE WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ATH X86_X32_ABI ZONE_DEVICE] disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed testing current HEAD feffde684ac29a3b7aec82d2df850fbdbdee55e4 testing commit feffde684ac29a3b7aec82d2df850fbdbdee55e4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fececc71898f1c16558983c5c1ad3d3785df1af6ec9071cb4c37f308010fd353 run #0: crashed: INFO: task hung in bdev_release run #1: crashed: INFO: task hung in bdev_open run #2: crashed: INFO: task hung in bdev_release run #3: crashed: INFO: task hung in bdev_release run #4: crashed: INFO: task hung in bdev_release run #5: crashed: INFO: task hung in bdev_release run #6: crashed: INFO: task hung in bdev_release run #7: crashed: INFO: task hung in bdev_release run #8: crashed: INFO: task hung in bdev_open run #9: crashed: INFO: task hung in bdev_release representative crash: INFO: task hung in bdev_release, types: [HANG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 1h56m58.911915976s (build: 1h0m58.35971954s, test: 51m42.752643506s) crash still not fixed or there were kernel test errors commit msg: Merge tag 'for-6.13-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux crash: INFO: task hung in bdev_release INFO: task syz-executor.0:2291 blocked for more than 143 seconds. Not tainted 6.13.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:14064 pid:2291 tgid:2290 ppid:1886 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x6b2/0xa40 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xac/0x140 kernel/sched/core.c:6848 schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:6905 __mutex_lock_common kernel/locking/mutex.c:665 [inline] __mutex_lock+0x451/0x980 kernel/locking/mutex.c:735 bdev_release+0x70/0x170 block/bdev.c:1087 blkdev_release+0xc/0x20 block/fops.c:635 __fput+0x88/0x2a0 fs/file_table.c:450 task_work_run+0x84/0xb0 kernel/task_work.c:239 get_signal+0x65/0x7a0 kernel/signal.c:2790 arch_do_signal_or_restart+0x89/0x2b0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x64/0x1b0 kernel/entry/common.c:218 do_syscall_64+0x9a/0x190 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9c3ae7c8d9 RSP: 002b:00007f9c3bb5c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007f9c3af9bf80 RCX: 00007f9c3ae7c8d9 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006 RBP: 00007f9c3aed8ad0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f9c3af9bf80 R15: 00007ffc6b5b81e8 INFO: task syz-executor.0:2293 blocked for more than 143 seconds. Not tainted 6.13.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:12888 pid:2293 tgid:2290 ppid:1886 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x6b2/0xa40 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xac/0x140 kernel/sched/core.c:6848 io_schedule+0x3f/0x60 kernel/sched/core.c:7681 folio_wait_bit_common+0x1e6/0x4a0 mm/filemap.c:1308 folio_put_wait_locked mm/filemap.c:1472 [inline] do_read_cache_folio+0x41/0x2d0 mm/filemap.c:3808 read_mapping_folio include/linux/pagemap.h:1011 [inline] read_part_sector+0x2e/0xe0 block/partitions/core.c:722 adfspart_check_POWERTEC+0x3f/0x210 block/partitions/acorn.c:454 check_partition block/partitions/core.c:141 [inline] blk_add_partitions block/partitions/core.c:589 [inline] bdev_disk_changed+0x2ba/0x780 block/partitions/core.c:693 blkdev_get_whole+0xd2/0x120 block/bdev.c:707 bdev_open+0x189/0x360 block/bdev.c:916 bdev_file_open_by_dev+0x11c/0x140 block/bdev.c:1018 disk_scan_partitions+0x84/0xc0 block/genhd.c:367 blkdev_common_ioctl+0xa90/0xde0 block/ioctl.c:617 blkdev_ioctl+0x216/0x290 block/ioctl.c:687 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0x6a/0xb0 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9c3ae7c8d9 RSP: 002b:00007f9c3bb3b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9c3af9c050 RCX: 00007f9c3ae7c8d9 RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000003 RBP: 00007f9c3aed8ad0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f9c3af9c050 R15: 00007ffc6b5b81e8 INFO: task udevd:2292 blocked for more than 143 seconds. Not tainted 6.13.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:13936 pid:2292 tgid:2292 ppid:1351 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x6b2/0xa40 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xac/0x140 kernel/sched/core.c:6848 schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:6905 __mutex_lock_common kernel/locking/mutex.c:665 [inline] __mutex_lock+0x451/0x980 kernel/locking/mutex.c:735 bdev_open+0x73/0x360 block/bdev.c:904 blkdev_open+0xd1/0xf0 block/fops.c:627 do_dentry_open+0x272/0x3d0 fs/open.c:945 vfs_open+0x28/0xd0 fs/open.c:1075 do_open fs/namei.c:3828 [inline] path_openat+0xbd3/0xdf0 fs/namei.c:3987 do_filp_open+0xc5/0x180 fs/namei.c:4014 do_sys_openat2+0x7e/0xe0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x7c/0xa0 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f682b36a9a4 RSP: 002b:00007ffedd1a3c50 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000055c2963372c0 RCX: 00007f682b36a9a4 RDX: 00000000000a0800 RSI: 000055c29633fc60 RDI: 00000000ffffff9c RBP: 000055c29633fc60 R08: 0000000000000001 R09: 7fffffffffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800 R13: 000055c29633faf0 R14: 0000000000000001 R15: 000055c296336910 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff839822d8 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff839822d8 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff839822d8 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x30/0x100 kernel/locking/lockdep.c:6744 2 locks held by getty/1412: #0: ffff8881027388a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243 #1: ffffc90002bef2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x23d/0x910 drivers/tty/n_tty.c:2211 1 lock held by syz-executor.0/2291: #0: ffff888109aef4c8 (&disk->open_mutex){....}-{3:3}, at: bdev_release+0x70/0x170 block/bdev.c:1087 1 lock held by syz-executor.0/2293: #0: ffff888109aef4c8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904 1 lock held by udevd/2292: #0: ffff888109aef4c8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904 1 lock held by syz-executor.0/2696: #0: ffff888109aef4c8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904 1 lock held by syz-executor.0/2697: #0: ffff888109aef4c8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904 1 lock held by syz-executor.0/3100: #0: ffff888109aef4c8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904 1 lock held by syz-executor.0/3101: #0: ffff888109aef4c8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x3e/0xe0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x146/0x160 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline] watchdog+0x5eb/0x610 kernel/hung_task.c:397 kthread+0xec/0x100 kernel/kthread.c:389 ret_from_fork+0x34/0x40 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111