ci starts bisection 2024-10-29 20:39:10.494727407 +0000 UTC m=+44524.601137036
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: df1a0cca2ffaab301e3d65cf85a6db4d973fb87100bc476b93fe0aecd82c297c
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_get_by_dev
run #10: crashed: INFO: task hung in blkdev_put
run #11: crashed: INFO: task hung in blkdev_put
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 [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: 9bea43176498ddb1e7b5263ed6a6f0d6f088ebe56bc76420212d78bfa12c3f70
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_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_put, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], 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: 78541845f726d16e6345affc58923541c064dbd60af9e42f8f026e08b250cf93
all runs: OK
false negative chance: 0.000
testing without sub-chunk 2/5
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: 82d868b5c58ebaa10d56528a7397d022b4359184f0b0c103dd0bb39dbfa6e6b8
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: 44696f1a1e0a229a5ec6b64ca209b3632809201df4a029ae6e6393596941acc2
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_get_by_dev
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_put, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
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: 4c0f16163177dc4ce7860aaf65309d413d440c630a64337647516809a093fbbc
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_get_by_dev
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 5/5
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: c0e3c585557c56b77ca8ffecc4f09299fcdea9ea9e8684629ffa87cfcddec166
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_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_put, 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 e42b1a9a2557aa94fee47f078633677198386a52
testing commit e42b1a9a2557aa94fee47f078633677198386a52 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b1af3344369f83f73ee7670db22374773c77ccf75f43000a4e54459f21288406
run #0: crashed: INFO: task hung in bdev_release
run #1: crashed: INFO: task hung in bdev_release
run #2: crashed: INFO: task hung in bdev_open
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_release
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: 2h38m35.653732476s (build: 1h40m53.6138445s, test: 52m51.135492947s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'spi-fix-v6.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
crash: INFO: task hung in bdev_release
INFO: task syz-executor.0:2289 blocked for more than 143 seconds.
Not tainted 6.12.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:13848 pid:2289 tgid:2288 ppid:1883 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x6c3/0xa30 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6782
schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:6839
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x44a/0x970 kernel/locking/mutex.c:752
bdev_release+0x70/0x170 block/bdev.c:1087
blkdev_release+0xc/0x20 block/fops.c:639
__fput+0x88/0x2a0 fs/file_table.c:431
task_work_run+0x84/0xb0 kernel/task_work.c:239
get_signal+0x65/0x7c0 kernel/signal.c:2690
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:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x57/0x1d0 kernel/entry/common.c:218
do_syscall_64+0x9a/0x190 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb25f07c8d9
RSP: 002b:00007fb25fdf30c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007fb25f19bf80 RCX: 00007fb25f07c8d9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006
RBP: 00007fb25f0d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007fb25f19bf80 R15: 00007ffdf1181f88
INFO: task syz-executor.0:2290 blocked for more than 143 seconds.
Not tainted 6.12.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:14520 pid:2290 tgid:2288 ppid:1883 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x6c3/0xa30 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xac/0x140 kernel/sched/core.c:6782
schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:6839
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x44a/0x970 kernel/locking/mutex.c:752
bdev_open+0x73/0x360 block/bdev.c:904
bdev_file_open_by_dev+0x11c/0x140 block/bdev.c:1018
disk_scan_partitions+0x84/0xc0 block/genhd.c:367
blkdev_common_ioctl+0xa8d/0xdc0 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:907 [inline]
__se_sys_ioctl+0x6d/0xb0 fs/ioctl.c:893
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: 0033:0x7fb25f07c8d9
RSP: 002b:00007fb25fdd20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb25f19c050 RCX: 00007fb25f07c8d9
RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000003
RBP: 00007fb25f0d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb25f19c050 R15: 00007ffdf1181f88
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff83982710 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff83982710 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff83982710 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x30/0x100 kernel/locking/lockdep.c:6720
2 locks held by getty/1408:
#0: ffff888100adf8a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc900029b32f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x23d/0x910 drivers/tty/n_tty.c:2211
1 lock held by udevd/1886:
#0: ffff888109ef0cc8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904
1 lock held by syz-executor.0/2289:
#0: ffff888109ef0cc8 (&disk->open_mutex){....}-{3:3}, at: bdev_release+0x70/0x170 block/bdev.c:1087
1 lock held by syz-executor.0/2290:
#0: ffff888109ef0cc8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904
1 lock held by syz-executor.0/2693:
#0: ffff888109ef0cc8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904
1 lock held by syz-executor.0/2694:
#0: ffff888109ef0cc8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904
1 lock held by syz-executor.0/3097:
#0: ffff888109ef0cc8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904
1 lock held by syz-executor.0/3098:
#0: ffff888109ef0cc8 (&disk->open_mutex){....}-{3:3}, at: bdev_open+0x73/0x360 block/bdev.c:904
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc5-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:223 [inline]
watchdog+0x5e4/0x610 kernel/hung_task.c:379
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 78 Comm: kworker/u8:3 Not tainted 6.12.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:perf_event_text_poke+0x8f/0xb0
Code: 44 24 24 01 00 66 44 89 54 24 26 48 89 7c 24 28 48 89 e6 48 c7 c7 30 67 35 81 31 d2 e8 4a e9 ff ff 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 30 75 09 48 83 c4 38 e9 fc d9 7a 01 e8 ec 3b 5f 01 66
RSP: 0018:ffffc900001e3cf8 EFLAGS: 00000246
RAX: c87c35f24af05700 RBX: ffffffff8478c98a RCX: ffffffff8478c98a
RDX: 0000000000000005 RSI: ffffc900001e3d6a RDI: ffffffff8143842d
RBP: 0000000000000005 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff81046010 R12: ffffc900001e3d6b
R13: ffffffff8478c98a R14: 0000000000000001 R15: 0000000000000009
FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f53c22040 CR3: 0000000003846000 CR4: 0000000000350ef0
Call Trace:
text_poke_bp_batch+0x132/0x310 arch/x86/kernel/alternative.c:2348
text_poke_flush arch/x86/kernel/alternative.c:2486 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2493
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+0x40/0x60 kernel/jump_label.c:248
toggle_allocation_gate+0xe6/0x130 mm/kfence/core.c:854
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0x2ad/0x5c0 kernel/workqueue.c:3310
worker_thread+0x23e/0x2e0 kernel/workqueue.c:3391
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