IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready INFO: task syz-executor1:4663 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #146 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D23600 4663 5393 0x00000006 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline] _synchronize_rcu_expedited+0xc68/0xfd0 kernel/rcu/tree_exp.h:667 synchronize_rcu_expedited+0x35/0xb0 kernel/rcu/tree_exp.h:795 synchronize_net+0x3b/0x60 net/core/dev.c:9036 packet_set_ring+0x286/0x1da0 net/packet/af_packet.c:4322 packet_release+0x656/0xda0 net/packet/af_packet.c:2998 __sock_release+0xd7/0x250 net/socket.c:579 sock_close+0x19/0x20 net/socket.c:1141 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 get_signal+0x155e/0x1980 kernel/signal.c:2343 do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: 83 c4 18 c3 e8 d8 64 00 00 48 8b 04 24 48 8b 4c 24 08 48 89 01 e8 d7 2d fc ff e8 22 7a fc ff b8 02 00 00 00 48 8d 0d 2a 60 09 <01> 87 01 8b 05 22 60 09 01 83 f8 01 0f 85 8a 00 00 00 b8 01 00 00 RSP: 002b:00007f6c415f5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000457569 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000009 RBP: 000000000072c220 R08: 000000000000035e R09: 0000000000000000 R10: 0000000020001000 R11: 0000000000000246 R12: 00007f6c415f66d4 R13: 00000000004c39f5 R14: 00000000004d59e8 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/983: #0: 000000005136679b (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4435 2 locks held by rsyslogd/5253: #0: 000000000346ee82 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 #1: 0000000092ea230f (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1822 [inline] #1: 0000000092ea230f (&rq->lock){-.-.}, at: __schedule+0x236/0x1ed0 kernel/sched/core.c:3411 2 locks held by getty/5342: #0: 00000000a33be45f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000002a3a9d0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5343: #0: 000000001f18a15e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000079e01a43 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5344: #0: 00000000532e988c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000008bcf03c3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5345: #0: 000000006dd03edd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000cf4f1540 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5346: #0: 000000000cd42aa2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000007a41a118 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5347: #0: 000000009996b7f9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000072e1b1f3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5348: #0: 00000000fc733b72 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000b01785ba (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by syz-executor1/4663: #0: 000000005bdbed36 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:738 [inline] #0: 000000005bdbed36 (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x8b/0x250 net/socket.c:578 #1: 000000004a3a9ede (sk_lock-AF_PACKET){+.+.}, at: lock_sock include/net/sock.h:1491 [inline] #1: 000000004a3a9ede (sk_lock-AF_PACKET){+.+.}, at: packet_release+0x5ff/0xda0 net/packet/af_packet.c:2995 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 983 Comm: khungtaskd Not tainted 4.19.0-rc7+ #146 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+0x1c4/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb3e/0x1050 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.441 msecs NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.0-rc7+ #146 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:___update_load_sum kernel/sched/pelt.c:185 [inline] RIP: 0010:__update_load_avg_cfs_rq+0x8f/0x9b0 kernel/sched/pelt.c:301 Code: 89 fa 65 48 8b 0c 25 28 00 00 00 48 89 8c 24 88 00 00 00 31 c9 48 c1 ea 03 80 3c 02 00 0f 85 f6 05 00 00 4c 8b bb 80 00 00 00 <4c> 89 ea 4c 29 fa 0f 88 19 03 00 00 48 89 d0 48 c1 e8 0a 48 85 c0 RSP: 0018:ffff8801dae072c0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8801dae2cc00 RCX: 0000000000000000 RDX: 1ffff1003b5c5990 RSI: 0000000000000000 RDI: ffff8801dae2cc80 RBP: ffff8801dae07378 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8801dae2d6d0 R12: 1ffff1003b5c0e5e R13: 0000015ab550915e R14: ffff8801dae2cca0 R15: 0000015ab51c3c00 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001be117000 CR4: 00000000001406f0 Call Trace: update_cfs_rq_load_avg kernel/sched/fair.c:3424 [inline] update_blocked_averages+0x496/0x1e00 kernel/sched/fair.c:7363 _nohz_idle_balance+0x5ba/0x7a0 kernel/sched/fair.c:9349 nohz_idle_balance kernel/sched/fair.c:9402 [inline] run_rebalance_domains+0x2ec/0x500 kernel/sched/fair.c:9585 __do_softirq+0x30b/0xad8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 scheduler_ipi+0x55a/0xad0 kernel/sched/core.c:1780 smp_reschedule_interrupt+0x109/0x650 arch/x86/kernel/smp.c:278 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:888 RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57 Code: e9 2c ff ff ff 48 89 c7 48 89 45 d8 e8 b3 da 11 fa 48 8b 45 d8 e9 ca fe ff ff 48 89 df e8 a2 da 11 fa eb 82 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90 RSP: 0018:ffffffff89207bb8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02 RAX: dffffc0000000000 RBX: 1ffffffff1240f7b RCX: 0000000000000000 RDX: 1ffffffff1263e54 RSI: 0000000000000001 RDI: ffffffff8931f2a0 RBP: ffffffff89207bb8 R08: ffffffff89276e40 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89207c78 R13: ffffffff89f3be20 R14: 0000000000000000 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xbf/0x490 arch/x86/kernel/process.c:498 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3db/0x5b0 kernel/sched/idle.c:262 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368 rest_init+0xe2/0xe5 init/main.c:442 start_kernel+0x8f4/0x92f init/main.c:739 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243