IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready netlink: 'syz-executor2': attribute type 41 has an invalid length. netlink: 'syz-executor2': attribute type 41 has an invalid length. INFO: task syz-executor3:25504 blocked for more than 140 seconds. Not tainted 4.19.0-rc3+ #99 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D25400 25504 5348 0x00000004 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:9012 __unregister_prot_hook+0x2b8/0x340 net/packet/af_packet.c:349 packet_do_bind+0x78c/0xdb0 net/packet/af_packet.c:3082 packet_bind+0x15d/0x1b0 net/packet/af_packet.c:3165 __sys_bind+0x331/0x440 net/socket.c:1483 __do_sys_bind net/socket.c:1494 [inline] __se_sys_bind net/socket.c:1492 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1492 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4572d9 Code: 42 08 48 8b 40 08 48 89 04 24 e8 02 d3 fc ff 48 8b 6c 24 08 48 83 c4 10 c3 e8 e3 2b 00 00 eb c1 cc 64 48 8b 0c 25 f8 ff ff ff <48> 3b 61 10 76 75 48 83 ec 38 48 89 6c 24 30 48 8d 6c 24 30 48 8b RSP: 002b:00007f76e2d47c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 00007f76e2d486d4 RCX: 00000000004572d9 RDX: 0000000000000014 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cba40 R14: 00000000004c3428 R15: 0000000000000002 INFO: task syz-executor3:25527 blocked for more than 140 seconds. Not tainted 4.19.0-rc3+ #99 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D26544 25527 5348 0x00000004 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 __lock_sock+0x1fb/0x350 net/core/sock.c:2312 lock_sock_nested+0xfe/0x120 net/core/sock.c:2834 lock_sock include/net/sock.h:1491 [inline] sock_setsockopt+0x1aa/0x2280 net/core/sock.c:678 __sys_setsockopt+0x304/0x3c0 net/socket.c:1898 __do_sys_setsockopt net/socket.c:1913 [inline] __se_sys_setsockopt net/socket.c:1910 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1910 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4572d9 Code: 42 08 48 8b 40 08 48 89 04 24 e8 02 d3 fc ff 48 8b 6c 24 08 48 83 c4 10 c3 e8 e3 2b 00 00 eb c1 cc 64 48 8b 0c 25 f8 ff ff ff <48> 3b 61 10 76 75 48 83 ec 38 48 89 6c 24 30 48 8d 6c 24 30 48 8b RSP: 002b:00007f76e2d05c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f76e2d066d4 RCX: 00000000004572d9 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000004 RBP: 0000000000930320 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d54c0 R14: 00000000004c96ea R15: 0000000000000004 Showing all locks held in the system: 1 lock held by khungtaskd/985: #0: 000000006b0c1827 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4436 1 lock held by rsyslogd/5208: 2 locks held by getty/5298: #0: 000000007dd56e8d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000fbf63fe9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5299: #0: 00000000f248103b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000c0e2322b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5300: #0: 000000003f535e8e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000e42644e8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5301: #0: 00000000e8bee1ed (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000e0718531 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5302: #0: 00000000ed7e4a75 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000a2704c05 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5303: #0: 00000000094d04ad (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000060965caf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5304: #0: 0000000090445c44 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000083b88ead (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 1 lock held by syz-executor3/25504: #0: 00000000f3b4ebec (sk_lock-AF_PACKET){+.+.}, at: lock_sock include/net/sock.h:1491 [inline] #0: 00000000f3b4ebec (sk_lock-AF_PACKET){+.+.}, at: packet_do_bind+0x9c/0xdb0 net/packet/af_packet.c:3044 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 985 Comm: khungtaskd Not tainted 4.19.0-rc3+ #99 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: 1.490 msecs NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.0-rc3+ #99 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:find_busiest_group+0x345/0x1ca0 kernel/sched/fair.c:8277 Code: 00 0f 85 f2 10 00 00 48 81 c4 e0 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 0a 11 00 00 4d 8b b4 24 80 fe ff ff 4d 85 f6 0f RSP: 0018:ffff8801dae06fc0 EFLAGS: 00000a02 RAX: dffffc0000000000 RBX: ffff8801dae07020 RCX: 0000000000000000 RDX: 1ffff1003b5c0e04 RSI: 0000000000000001 RDI: ffff8801d9ae7850 RBP: ffff8801dae071c8 R08: ffff8801dae07348 R09: 000000000000001a R10: 000000000000045b R11: 0000000000000002 R12: ffff8801dae071a0 R13: 1ffff1003b5c0e00 R14: ffff8801d9ae7800 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001bf10c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: load_balance+0x66c/0x3430 kernel/sched/fair.c:8467 rebalance_domains+0x845/0xdc0 kernel/sched/fair.c:8883 _nohz_idle_balance+0x621/0x7a0 kernel/sched/fair.c:9269 nohz_idle_balance kernel/sched/fair.c:9317 [inline] run_rebalance_domains+0x2ec/0x500 kernel/sched/fair.c:9500 __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 43 91 02 fa 48 8b 45 d8 e9 ca fe ff ff 48 89 df e8 32 91 02 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:ffffffff89407bb8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02 RAX: dffffc0000000000 RBX: 1ffffffff1280f7b RCX: 0000000000000000 RDX: 1ffffffff12a4540 RSI: 0000000000000001 RDI: ffffffff89522a00 RBP: ffffffff89407bb8 R08: ffffffff89475fc0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89407c78 R13: ffffffff8a314b20 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:452 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:433 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242