ci starts bisection 2025-04-16 14:54:46.713057906 +0000 UTC m=+105716.225874098
bisecting fixing commit since 0a9b9d17f3a781dea03baca01c835deaa07f7cc3
building syzkaller on 77f3eeb755d0c3e79023775a7e72e05dded0f8a1
ensuring issue is reproducible on original commit 0a9b9d17f3a781dea03baca01c835deaa07f7cc3
testing commit 0a9b9d17f3a781dea03baca01c835deaa07f7cc3 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 840d04f2f88df3da412691c5d9c4bb66b1b8ad8bcd313c2855830f6b3e0fb740
all runs: crashed: INFO: task hung in hci_cmd_sync_clear
representative crash: INFO: task hung in hci_cmd_sync_clear, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit 0a9b9d17f3a781dea03baca01c835deaa07f7cc3 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4da072f2f553afb01a23e09dc2cfcb01981869c20a2b0b5f222f19a704417428
all runs: crashed: INFO: task hung in hci_cmd_sync_clear
representative crash: INFO: task hung in hci_cmd_sync_clear, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
kconfig minimization: base=4083 full=8191 leaves diff=2129
split chunks (needed=false): <2129>
split chunk #0 of len 2129 into 5 parts
testing without sub-chunk 1/5
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit 0a9b9d17f3a781dea03baca01c835deaa07f7cc3 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 24f0480d8541eb3f0cdfc69d72e843070fff4f65c3c107a26bb8f993f68b73cd
all runs: OK
false negative chance: 0.000
testing without sub-chunk 2/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit 0a9b9d17f3a781dea03baca01c835deaa07f7cc3 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: a00ff87c8ba27e9d6efb52cc74605350f1e376ffc2c87c33b6d894bfadd48fe7
all runs: crashed: INFO: task hung in hci_cmd_sync_clear
representative crash: INFO: task hung in hci_cmd_sync_clear, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
testing commit 0a9b9d17f3a781dea03baca01c835deaa07f7cc3 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 93fe632321e6de032519b1e93491c7deeb9029ca53905d96290ee284532fe6db
all runs: crashed: INFO: task hung in hci_cmd_sync_clear
representative crash: INFO: task hung in hci_cmd_sync_clear, 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 0a9b9d17f3a781dea03baca01c835deaa07f7cc3 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 6d80cf66a0fb6a3d2c0c22c684ffd1f7d574c27832ffcb4529ee6ba04a583069
run #0: ignore: lost connection to test machine
run #1: crashed: INFO: task hung in hci_cmd_sync_clear
run #2: crashed: INFO: task hung in hci_cmd_sync_clear
run #3: crashed: INFO: task hung in hci_cmd_sync_clear
run #4: crashed: INFO: task hung in hci_cmd_sync_clear
run #5: crashed: INFO: task hung in hci_cmd_sync_clear
run #6: crashed: INFO: task hung in hci_cmd_sync_clear
run #7: crashed: INFO: task hung in hci_cmd_sync_clear
run #8: crashed: INFO: task hung in hci_cmd_sync_clear
run #9: crashed: INFO: task hung in hci_cmd_sync_clear
representative crash: INFO: task hung in hci_cmd_sync_clear, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit 0a9b9d17f3a781dea03baca01c835deaa07f7cc3 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 908cd768c488b77b4a9b6af8f415e18eabd287463d7e5d45d9f972d212f63404
all runs: crashed: INFO: task hung in hci_cmd_sync_clear
representative crash: INFO: task hung in hci_cmd_sync_clear, 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_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_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 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 BATMAN_ADV_NC BCACHE BCACHEFS_DEBUG BCACHEFS_ERASURE_CODING BCACHEFS_FS BCACHEFS_POSIX_ACL BCACHEFS_QUOTA BCACHEFS_SIX_OPTIMISTIC_SPIN 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_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_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_NF_EBTABLES_LEGACY 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_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_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 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 CARL9170 CARL9170_HWRNG CARL9170_LEDS CARL9170_WPC CC_HAS_SANE_STACKPROTECTOR 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_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 CLOCKSOURCE_VALIDATE_LAST_CYCLE CLOSURES CLS_U32_MARK CLS_U32_PERF CMA CMA_SIZE_SEL_MAX CMDLINE_PARTITION COMEDI COMEDI_DT9812 COMEDI_NI_USB6501 COMEDI_USBDUX COMEDI_USBDUXFAST COMEDI_USBDUXSIGMA COMEDI_USB_DRIVERS COMEDI_VMK80XX COMPAT_NETLINK_MESSAGES COUNTER CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRC32_SLICEBY8 CRC4 CRC64 CRC64_ROCKSOFT CRC7 CRC8 CRC_ITU_T CRC_T10DIF 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_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 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_CHACHA_GENERIC CRYPTO_LIB_CURVE25519 CRYPTO_LIB_CURVE25519_GENERIC CRYPTO_LIB_DES CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LRW CRYPTO_LZ4 CRYPTO_LZ4HC 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_SHA512_SSSE3 CRYPTO_SIMD 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 CRYPTO_ZSTD CUSE CYPRESS_FIRMWARE DAMON DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCA DCB DEBUG_TIMEKEEPING DEFAULT_CODEL DEVICE_MIGRATION DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_ENGINE_RAID 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_AUX_BRIDGE DRM_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DISPLAY_DP_AUX_BUS DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR ENCRYPTED_KEYS FSCACHE FUSE_FS GPIOLIB HAMRADIO HID_DRAGONRISE IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ LIBNVDIMM MAC80211 MAC80211_DEBUGFS MAC80211_LEDS MCORE2 MEDIA_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MMC MTD NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED RFKILL SERIAL_DEV_BUS 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 [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing current HEAD 1a1d569a75f3ab2923cb62daf356d102e4df2b86
testing commit 1a1d569a75f3ab2923cb62daf356d102e4df2b86 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 9506cdb56f92b08b3c6116b2c4473546f5585441d0b342ff9e828a123e33b212
all runs: crashed: INFO: task hung in hci_cmd_sync_clear
representative crash: INFO: task hung in hci_cmd_sync_clear, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 4h29m51.675727583s (build: 3h22m52.384476147s, test: 58m58.31632118s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'edac_urgent_for_v6.15_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras
crash: INFO: task hung in hci_cmd_sync_clear
INFO: task syz-executor:2958 blocked for more than 143 seconds.
Not tainted 6.15.0-rc2-syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:12008 pid:2958 tgid:2958 ppid:1 task_flags:0x40054c flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x593/0xd20 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x25/0x110 kernel/sched/core.c:6860
schedule_timeout+0x109/0x120 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x96/0x1b0 kernel/sched/completion.c:116
__flush_work+0x280/0x430 kernel/workqueue.c:4244
__cancel_work_sync kernel/workqueue.c:4364 [inline]
cancel_work_sync+0x4f/0x60 kernel/workqueue.c:4401
hci_cmd_sync_clear+0x27/0x70 net/bluetooth/hci_sync.c:655
hci_unregister_dev+0xba/0x1f0 net/bluetooth/hci_core.c:2674
vhci_release+0x37/0x70 drivers/bluetooth/hci_vhci.c:665
__fput+0xea/0x2b0 fs/file_table.c:465
task_work_run+0x54/0x80 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x2ea/0xba0 kernel/exit.c:953
do_group_exit+0x31/0x90 kernel/exit.c:1102
get_signal+0x9f2/0xa00 kernel/signal.c:3034
arch_do_signal_or_restart+0x38/0x260 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+0xdb/0x170 kernel/entry/common.c:218
do_syscall_64+0x7a/0x1a0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2fe8b7d15c
RSP: 002b:00007fffd5643510 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007f2fe8b7d15c
RDX: 0000000000000028 RSI: 00007fffd56435c0 RDI: 00000000000000f9
RBP: 00007fffd564356c R08: 0000000000000000 R09: 00007fffd5643287
R10: 00007fffd5642ed0 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000000f645 R14: 000000000000f645 R15: 00007fffd56435c0
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff83f8bd40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff83f8bd40 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff83f8bd40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x36/0x120 kernel/locking/lockdep.c:6764
2 locks held by kworker/u8:2/43:
#0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc9000016fe40 (connector_reaper_work){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
3 locks held by kworker/u9:0/50:
#0: ffff88810c75b148 ((wq_completion)hci6){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc900001a7e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810e768d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
2 locks held by kworker/u8:5/1251:
#0: ffff888100078948 ((wq_completion)events_unbound){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc900022e3e40 ((reaper_work).work){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
3 locks held by kworker/u9:1/1430:
#0: ffff888102710d48 ((wq_completion)hci2){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc90001863e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810b370d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
2 locks held by getty/1530:
#0: ffff8881077a00a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x60 drivers/tty/tty_ldisc.c:243
#1: ffffc90002bd32f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x17a/0x660 drivers/tty/n_tty.c:2222
3 locks held by kworker/u9:2/2037:
#0: ffff88817a1a9148 ((wq_completion)hci0){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc90001c33e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88817afe0d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:3/2059:
#0: ffff888106f11548 ((wq_completion)hci1){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc90001cebe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810bf50d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:4/6159:
#0: ffff88817a159148 ((wq_completion)hci3){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc900051dbe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88817b588d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:5/7761:
#0: ffff88817a01ed48 ((wq_completion)hci4){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc90003a93e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810e750d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:6/9362:
#0: ffff88810f3e2148 ((wq_completion)hci7){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc90005183e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810df02d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:7/10962:
#0: ffff88810f3e1148 ((wq_completion)hci5){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc9000354be40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810e78cd80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:8/12564:
#0: ffff88810c745148 ((wq_completion)hci11){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc90005263e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810e782d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:9/14164:
#0: ffff88810c754d48 ((wq_completion)hci10){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc900033f3e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810eb5cd80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:10/15765:
#0: ffff8881073dd548 ((wq_completion)hci8){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc9000529be40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88817afdad80 (&hdev->req_lock){....}-{3:3}
, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:11/17366:
#0: ffff88810c75a148 ((wq_completion)hci9){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc90004abbe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810cf62d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:12/18968:
#0: ffff88810c75b948 ((wq_completion)hci14){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc9000524be40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88817afd8d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:13/20569:
#0: ffff88810c752148 ((wq_completion)hci12){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc900036cbe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810e756d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:15/22596:
#0: ffff8881073de148 ((wq_completion)hci13){....}-{0:0}, at: process_one_work+0x42f/0x660 kernel/workqueue.c:3213
#1: ffffc900039bbe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ed/0x660 kernel/workqueue.c:3214
#2: ffff88810e788d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x5a/0x90 lib/dump_stack.c:120
nmi_cpu_backtrace+0xd4/0x110 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0xd5/0x140 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x652/0x690 kernel/hung_task.c:437
kthread+0x104/0x200 kernel/kthread.c:464
ret_from_fork+0x2c/0x50 arch/x86/kernel/process.c:153
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: 0 Comm: swapper/1 Not tainted 6.15.0-rc2-syzkaller #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:81
Code: 14 cb 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d c5 d3 18 00 fb f4 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc900000abed0 EFLAGS: 000002c2
RAX: 000000000011ba3c RBX: ffff8881012ea200 RCX: 00000031a6b0c480
RDX: ffff888237d26968 RSI: ffffffff83afc916 RDI: ffffffff83a65cff
RBP: 0000000000000001 R08: 00000000000a0071 R09: 0000000000000000
R10: 0000000000080000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8882b2d5f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f290af062d8 CR3: 0000000103398000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:748
default_idle_call+0x48/0x140 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x1d4/0x230 kernel/sched/idle.c:325
cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:423
start_secondary+0x112/0x130 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x148