Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci3: command 0x0409 tx timeout Bluetooth: hci3: command 0x041b tx timeout Bluetooth: hci3: command 0x040f tx timeout Bluetooth: hci3: command 0x0419 tx timeout INFO: task syz-executor.3:10362 blocked for more than 140 seconds. Not tainted 4.19.163-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28288 10362 8114 0x80000006 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 unregister_netdevice_notifier+0x7b/0x330 net/core/dev.c:1708 raw_release+0x58/0x820 net/can/raw.c:358 __sock_release+0xcd/0x2a0 net/socket.c:579 sock_close+0x15/0x20 net/socket.c:1140 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbed/0x2be0 kernel/exit.c:890 do_group_exit+0x125/0x310 kernel/exit.c:993 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode+0x277/0x2d0 arch/x86/entry/common.c:198 retint_user+0x8/0x18 RIP: 0033:0x4039d7 Code: 00 00 00 48 83 ec 08 48 8b 15 dd 19 2b 01 48 8b 05 ce 19 2b 01 48 39 d0 48 8d 8a 00 00 00 01 72 17 48 39 c8 73 12 48 8d 50 04 <89> 38 48 89 15 b0 19 2b 01 48 83 c4 08 c3 48 89 c6 bf 10 2e 4d 00 RSP: 002b:00007ffd1bc6d0b0 EFLAGS: 00010287 RAX: 0000001b2ed27000 RBX: 0000000000000001 RCX: 0000001b2fd20000 RDX: 0000001b2ed27004 RSI: 0000000080000000 RDI: 0000000058e9be5b RBP: 000000000119c008 R08: 0000000000001e5c R09: 0000000058e9be5f R10: 00007ffd1bc6d260 R11: 0000000000000000 R12: 00007fb6f2984008 R13: 00000000000199d8 R14: 00007fb6f2984000 R15: ffffffff86efdcdc Showing all locks held in the system: 3 locks held by kworker/u4:2/108: #0: 00000000812bde5c ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2126 #1: 000000008e10b6b1 (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2130 #2: 000000006a5dc779 (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:520 1 lock held by khungtaskd/1566: #0: 00000000cca71277 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 1 lock held by in:imklog/7795: #0: 00000000a317d27e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by syz-executor.3/10362: #0: 00000000d38f6923 (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #0: 00000000d38f6923 (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:578 #1: 000000006a5dc779 (pernet_ops_rwsem){++++}, at: unregister_netdevice_notifier+0x7b/0x330 net/core/dev.c:1708 2 locks held by syz-executor.5/10391: 2 locks held by syz-executor.2/10394: 2 locks held by syz-executor.4/10395: #0: 000000006a5dc779 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x335 net/core/net_namespace.c:434 #1: 0000000024680eb6 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #1: 0000000024680eb6 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 1 lock held by syz-executor.0/10407: 2 locks held by syz-executor.1/10400: 1 lock held by syz-executor.3/10494: #0: 000000006a5dc779 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x335 net/core/net_namespace.c:434 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1566 Comm: khungtaskd Not tainted 4.19.163-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10391 Comm: syz-executor.5 Not tainted 4.19.163-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__pvclock_read_cycles arch/x86/include/asm/pvclock.h:85 [inline] RIP: 0010:pvclock_clocksource_read+0x155/0x520 arch/x86/kernel/pvclock.c:87 Code: 03 00 00 4c 89 c1 4c 89 c7 4c 89 de 0f be 53 1c 48 c1 e9 03 83 e7 07 48 c1 ee 03 0f b6 0c 29 0f b6 34 2e 40 38 f9 40 0f 9e c7 <84> c9 0f 95 c1 40 84 cf 0f 85 5d 02 00 00 4c 89 d9 83 e1 07 40 38 RSP: 0018:ffff8880ba007ea0 EFLAGS: 00000046 RAX: 00000079bd179dea RBX: ffffffff8c65b000 RCX: 0000000000000000 RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 0000000000000001 RBP: dffffc0000000000 R08: ffffffff8c65b018 R09: ffffffff8c65b00f R10: ffffffff8c65b017 R11: ffffffff8c65b01b R12: ffffffff8c65b003 R13: fffffbfff18cb601 R14: ffffffff8c65b01d R15: ffffffff8c65b010 FS: 00007fbae8083700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb2670c7020 CR3: 000000008f06d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kvm_clock_read arch/x86/kernel/kvmclock.c:103 [inline] kvm_sched_clock_read+0x14/0x40 arch/x86/kernel/kvmclock.c:115 paravirt_sched_clock arch/x86/include/asm/paravirt.h:175 [inline] sched_clock+0x2a/0x40 arch/x86/kernel/tsc.c:245 sched_clock_cpu+0x18/0x1b0 kernel/sched/clock.c:370 irqtime_account_irq+0x63/0x280 kernel/sched/cputime.c:59 account_irq_enter_time include/linux/vtime.h:108 [inline] irq_enter+0x62/0xd0 kernel/softirq.c:357 entering_irq arch/x86/include/asm/apic.h:525 [inline] entering_ack_irq arch/x86/include/asm/apic.h:531 [inline] smp_apic_timer_interrupt+0x1f/0x550 arch/x86/kernel/apic/apic.c:1090 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:784 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:806 [inline] RIP: 0010:lock_release+0xc2/0x8b0 kernel/locking/lockdep.c:3922 Code: 00 00 45 85 d2 0f 85 8b 03 00 00 48 c7 c0 80 81 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 c3 06 00 00 <48> 83 3d 96 ec a4 08 00 0f 84 1b 05 00 00 9c 58 0f 1f 44 00 00 48 RSP: 0018:ffff8880672a7890 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3030 RBX: ffff8880a37a8380 RCX: ffffc90010588000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8880a37a8c04 RBP: ffffffff89f85c60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1100ce54f15 R13: ffffffff86f4ac41 R14: 0000000000000002 R15: dffffc0000000000 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:681 [inline] inet_twsk_purge+0x558/0x7b4 net/ipv4/inet_timewait_sock.c:298 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156 setup_net+0x3d1/0x720 net/core/net_namespace.c:332 copy_net_ns+0x1f7/0x335 net/core/net_namespace.c:438 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165 copy_process.part.0+0x3a59/0x8200 kernel/fork.c:1919 copy_process kernel/fork.c:1713 [inline] _do_fork+0x22f/0xf30 kernel/fork.c:2228 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e299 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fbae8082c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e299 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 00000000e1004d7c RBP: 000000000119bfd0 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffce5c50b7f R14: 00007fbae80839c0 R15: 000000000119bf8c