ci starts bisection 2025-03-17 12:50:21.483064209 +0000 UTC m=+12488.568513768
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: 5f35d4a661c0b2c03655547b9c30bee1f5968af2f047e8cccb0218722a6df99c
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 [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: 9f4f5d16fd0175de232a390c14060a04b3caca19a59493aee09c94c1da95f442
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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
kconfig minimization: base=4064 full=8191 leaves diff=2118
split chunks (needed=false): <2118>
split chunk #0 of len 2118 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: 343ba73cd14652e31d0ed1708e0bc70046db5eb05bf585b74858289f162d1dd4
all runs: OK
false negative chance: 0.000
testing without sub-chunk 2/5
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: c3b0efb0295334ce5567e27fe67dbda8a14b7e361c6b691b475f0cc7fda51bc2
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 [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], 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: b398686ce4c02a6f88a178f55427592e39be6f2823615b321ef7a477429670a4
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: 48b86fbe51beeb4f3adda1bfd77951879509f1b26a2c032e485d98a9726e8209
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 5/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], 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: 742a30b216f2fd022c49a23b92bc25ba5e1b4d18dcaef154f8d82f919e85e5b1
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 424 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 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 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 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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing current HEAD 4701f33a10702d5fc577c32434eb62adde0a1ae1
testing commit 4701f33a10702d5fc577c32434eb62adde0a1ae1 gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b848bed344a829e7ec5c158edc5e0f461561f79cb2c2be8264a17af286a2ca84
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: 2h1m36.726611387s (build: 1h0m38.29856777s, test: 53m20.3035599s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.14-rc7
crash: INFO: task hung in hci_cmd_sync_clear
INFO: task syz-executor:2910 blocked for more than 143 seconds.
Not tainted 6.14.0-rc7-syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:12128 pid:2910 tgid:2910 ppid:1 task_flags:0x40054c flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x525/0xb40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x25/0x110 kernel/sched/core.c:6857
schedule_timeout+0x100/0x110 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x90/0x1c0 kernel/sched/completion.c:116
__flush_work+0x27a/0x420 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+0x20/0x70 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:664
__fput+0xea/0x2b0 fs/file_table.c:464
task_work_run+0x54/0x80 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x2f2/0xbb0 kernel/exit.c:938
do_group_exit+0x31/0x90 kernel/exit.c:1087
get_signal+0x9d4/0x9e0 kernel/signal.c:3036
arch_do_signal_or_restart+0x39/0x260 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/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa89277d15c
RSP: 002b:00007fff7c459d80 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007fa89277d15c
RDX: 0000000000000028 RSI: 00007fff7c459e30 RDI: 00000000000000f9
RBP: 00007fff7c459ddc R08: 0000000000000000 R09: 00007fff7c459af7
R10: 00007fff7c459740 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000000f312 R14: 000000000000f312 R15: 00007fff7c459e30
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff83b86d40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff83b86d40 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff83b86d40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x36/0x120 kernel/locking/lockdep.c:6746
3 locks held by kworker/u9:0/50:
#0: ffff88810e7c9d48 ((wq_completion)hci0){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc900001a7e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88810ebfcd80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:1/1380:
#0: ffff888105b9d548 ((wq_completion)hci2){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc900029e3e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88810e7c4d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
2 locks held by getty/1481:
#0: ffff888101fbd0a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x60 drivers/tty/tty_ldisc.c:243
#1: ffffc90002a472f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x54b/0x6a0 drivers/tty/n_tty.c:2211
3 locks held by kworker/u9:2/1563:
#0: ffff888103333148 ((wq_completion)hci3){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc9000116fe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff8881093c0d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:3/1565:
#0: ffff8881073fd948 ((wq_completion)hci1){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc9000118fe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88810e7c2d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:4/6113:
#0: ffff888105b9dd48 ((wq_completion)hci6){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc90004c43e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88810dfaad80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:5/7716:
#0: ffff88810e72a948 ((wq_completion)hci4){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc90002e2fe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88810e70ed80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:6/9319:
#0: ffff888100ed2d48 ((wq_completion)hci8){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc900052dbe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88811032cd80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:7/10921:
#0: ffff88810e779d48
((wq_completion)hci5){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc90003157e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88810f300d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:8/12523:
#0: ffff888173861d48 ((wq_completion)hci7){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc900050f7e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff8881086a4d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:9/14126:
#0: ffff8881073fd148 ((wq_completion)hci11){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc9000308fe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88810f3e0d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:10/14579:
#0: ffff88810f3f9148 ((wq_completion)hci9){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc9000250fe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88810e3e6d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:11/17330:
#0: ffff888109b60148 ((wq_completion)hci13){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc90002f2fe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff888174a4ad80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:12/18933:
#0: ffff888174894548 ((wq_completion)hci10){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc9000537fe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff88811032ad80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:13/20536:
#0: ffff888173861948 ((wq_completion)hci12){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc900034d7e40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff888109f34d80 (&hdev->req_lock){....}-{3:3}, at: hci_cmd_sync_work+0x93/0x160 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u9:14/22139:
#0: ffff8881073ff948 ((wq_completion)hci14){....}-{0:0}, at: process_one_work+0x43e/0x6b0 kernel/workqueue.c:3213
#1: ffffc9000162fe40 ((work_completion)(&hdev->cmd_sync_work)){....}-{0:0}, at: process_one_work+0x1ec/0x6b0 kernel/workqueue.c:3214
#2: ffff8881086a2d80 (&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 6.14.0-rc7-syzkaller #0
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x645/0x680 kernel/hung_task.c:399
kthread+0xf7/0x200 kernel/kthread.c:464
ret_from_fork+0x2c/0x50 arch/x86/kernel/process.c:148
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: 2428 Comm: syz-execprog Not tainted 6.14.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:x64_sys_call+0x139e/0x1720 arch/x86/include/generated/asm/syscalls_64.h:282
Code: 47 00 e9 75 c9 41 00 e9 10 cd 48 00 e9 0b c9 48 00 e9 16 b0 42 00 e9 21 01 4c 00 e9 ec fa 4b 00 e9 e7 85 21 00 e9 e2 d0 4d 00 7d b8 4d 00 e9 48 5f 4a 00 e9 13 56 1f 00 e9 5e e6 4d 00 e9 49
RSP: 0018:ffffc900023b7f20 EFLAGS: 00000246
RAX: ffffffffffffffff RBX: ffffc900023b7f58 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000119 RDI: ffffc900023b7f58
RBP: ffffc900023b7f48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000119
R13: 0000000000000119 R14: 0000000000000000 R15: 0000000000000000
FS: 000000c000efc098(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f24d5d062d8 CR3: 0000000105b04000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x6d/0x1a0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x40708e
Code: 48 83 ec 38 e8 13 00 00 00 48 83 c4 38 5d c3 cc cc cc cc cc cc cc cc cc cc cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48
RSP: 002b:000000c0014936d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000040708e
RDX: 0000000000000080 RSI: 000000c001493774 RDI: 0000000000000004
RBP: 000000c001493718 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000c0014937a8
R13: 00000000bc020cb9 R14: 000000c000efe1c0 R15: 00000000014d2160