Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout INFO: task syz-executor.4:9764 blocked for more than 140 seconds. Not tainted 4.14.280-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D25056 9764 7977 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 raw_close+0xe/0x30 net/ipv4/raw.c:701 inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425 __sock_release+0xcd/0x2b0 net/socket.c:602 sock_close+0x15/0x20 net/socket.c:1139 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f8223ce0d2b RSP: 002b:00007ffd271a53f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f8223ce0d2b RDX: 0000000000000000 RSI: 0000001b2e02773c RDI: 0000000000000006 RBP: 00007f8223e42960 R08: 0000000000000000 R09: 0000000052e89d15 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000001dfcd R13: 00007ffd271a54f0 R14: 00007ffd271a5510 R15: 0000000000000032 Showing all locks held in the system: 3 locks held by kworker/1:1/23: #0: ("%s"("ipv6_addrconf")){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((addr_chk_work).work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (rtnl_mutex){+.+.}, at: [] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4420 1 lock held by khungtaskd/1532: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by syz-executor.1/9719: #0: (rtnl_mutex){+.+.}, at: [] netdev_run_todo+0x20e/0xad0 net/core/dev.c:7934 1 lock held by syz-executor.0/9721: #0: (rtnl_mutex){+.+.}, at: [] netdev_run_todo+0x20e/0xad0 net/core/dev.c:7934 1 lock held by syz-executor.5/9732: #0: (rtnl_mutex){+.+.}, at: [] tun_detach drivers/net/tun.c:593 [inline] #0: (rtnl_mutex){+.+.}, at: [] tun_chr_close+0x34/0x60 drivers/net/tun.c:2732 2 locks held by syz-executor.2/9762: #0: (rtnl_mutex){+.+.}, at: [] ppp_release+0xdb/0x1a0 drivers/net/ppp/ppp_generic.c:408 #1: (uevent_sock_mutex){+.+.}, at: [] kobject_uevent_env+0x755/0xf30 lib/kobject_uevent.c:460 2 locks held by syz-executor.4/9764: #0: (&sb->s_type->i_mutex_key#13){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #0: (&sb->s_type->i_mutex_key#13){+.+.}, at: [] __sock_release+0x86/0x2b0 net/socket.c:601 #1: (rtnl_mutex){+.+.}, at: [] raw_close+0xe/0x30 net/ipv4/raw.c:701 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.280-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 17 Comm: ksoftirqd/1 Not tainted 4.14.280-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880b54b4480 task.stack: ffff8880b54b8000 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:774 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:796 [inline] RIP: 0010:lock_is_held_type+0x82/0x210 kernel/locking/lockdep.c:4032 RSP: 0018:ffff8880b54bf4d0 EFLAGS: 00000282 RAX: 0000000000000282 RBX: ffff8880b54b4480 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: ffff8880b54b4d04 RBP: ffffffff89ce7de0 R08: 0000000000000000 R09: 0000000000022012 R10: ffff8880b54b4d58 R11: ffff8880b54b4480 R12: ffff8880a4918020 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880aace4b60 FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4b95de2150 CR3: 00000000a160e000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:437 [inline] lockdep_rtnl_is_held+0x16/0x20 net/core/rtnetlink.c:125 fib_table_lookup+0x2a2/0x1680 net/ipv4/fib_trie.c:1358 fib_lookup include/net/ip_fib.h:326 [inline] __fib_validate_source net/ipv4/fib_frontend.c:344 [inline] fib_validate_source+0x678/0x17d0 net/ipv4/fib_frontend.c:413 ip_route_input_slow+0x228e/0x2de0 net/ipv4/route.c:2037 ip_route_input_rcu net/ipv4/route.c:2214 [inline] ip_route_input_noref+0xec/0x200 net/ipv4/route.c:2159 ip_rcv_finish+0x2ea/0x19f0 net/ipv4/ip_input.c:347 NF_HOOK include/linux/netfilter.h:250 [inline] ip_rcv+0x8a7/0xf10 net/ipv4/ip_input.c:493 __netif_receive_skb_core+0x15ee/0x2a30 net/core/dev.c:4474 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4512 netif_receive_skb_internal+0xd7/0x580 net/core/dev.c:4585 napi_skb_finish net/core/dev.c:4947 [inline] napi_gro_receive+0x2e2/0x400 net/core/dev.c:4978 gro_cell_poll+0x119/0x1d0 net/core/gro_cells.c:60 napi_poll net/core/dev.c:5604 [inline] net_rx_action+0x466/0xfd0 net/core/dev.c:5670 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 run_ksoftirqd+0x50/0x1a0 kernel/softirq.c:670 smpboot_thread_fn+0x5c1/0x920 kernel/smpboot.c:164 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 98 f0 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 6a 01 00 00 48 83 3d c6 5f af 07 00 0f 84 1d 01 00 00 9c 58 <0f> 1f 44 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 c3 48 c7 c0 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 7: fc ff df a: 48 c1 e8 03 shr $0x3,%rax e: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 12: 0f 85 6a 01 00 00 jne 0x182 18: 48 83 3d c6 5f af 07 cmpq $0x0,0x7af5fc6(%rip) # 0x7af5fe6 1f: 00 20: 0f 84 1d 01 00 00 je 0x143 26: 9c pushfq 27: 58 pop %rax * 28: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2d: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 34: fc ff df 37: 48 89 c3 mov %rax,%rbx 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: c0 .byte 0xc0