INFO: task syz-executor.2:8660 blocked for more than 143 seconds. Not tainted 5.4.0-rc5+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28464 8660 7735 0x00004004 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x74b/0xb80 kernel/sched/core.c:4069 schedule+0x131/0x1e0 kernel/sched/core.c:4136 schedule_timeout+0x46/0x240 kernel/time/timer.c:1871 do_wait_for_common+0x2e7/0x4d0 kernel/sched/completion.c:83 __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x47/0x60 kernel/sched/completion.c:136 __synchronize_srcu+0x1d7/0x260 kernel/rcu/srcutree.c:921 synchronize_srcu+0x2cb/0x2f0 kernel/rcu/srcutree.c:999 kvm_page_track_unregister_notifier+0x103/0x110 arch/x86/kvm/page_track.c:212 kvm_mmu_uninit_vm+0x1c/0x20 arch/x86/kvm/mmu.c:5828 kvm_arch_destroy_vm+0x616/0x6b0 arch/x86/kvm/x86.c:9579 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:702 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3444 [inline] kvm_dev_ioctl+0xc80/0x1fd0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3496 do_vfs_ioctl+0x744/0x1730 fs/ioctl.c:46 ksys_ioctl fs/ioctl.c:713 [inline] __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0xe3/0x120 fs/ioctl.c:718 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459f49 Code: 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 10 28 00 00 00 e8 3d d3 fa ff 48 8b 44 24 18 48 <89> 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 e8 44 b2 ff ff eb 82 cc RSP: 002b:00007f3b49021c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459f49 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3b490226d4 R13: 00000000004c30a8 R14: 00000000004d7018 R15: 00000000ffffffff INFO: task syz-executor.0:8664 blocked for more than 143 seconds. Not tainted 5.4.0-rc5+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28464 8664 7745 0x00004004 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x74b/0xb80 kernel/sched/core.c:4069 schedule+0x131/0x1e0 kernel/sched/core.c:4136 schedule_timeout+0x46/0x240 kernel/time/timer.c:1871 do_wait_for_common+0x2e7/0x4d0 kernel/sched/completion.c:83 __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x47/0x60 kernel/sched/completion.c:136 __synchronize_srcu+0x1d7/0x260 kernel/rcu/srcutree.c:921 synchronize_srcu+0x2cb/0x2f0 kernel/rcu/srcutree.c:999 kvm_page_track_unregister_notifier+0x103/0x110 arch/x86/kvm/page_track.c:212 kvm_mmu_uninit_vm+0x1c/0x20 arch/x86/kvm/mmu.c:5828 kvm_arch_destroy_vm+0x616/0x6b0 arch/x86/kvm/x86.c:9579 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:702 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3444 [inline] kvm_dev_ioctl+0xc80/0x1fd0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3496 do_vfs_ioctl+0x744/0x1730 fs/ioctl.c:46 ksys_ioctl fs/ioctl.c:713 [inline] __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0xe3/0x120 fs/ioctl.c:718 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459f49 Code: 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 10 28 00 00 00 e8 3d d3 fa ff 48 8b 44 24 18 48 <89> 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 e8 44 b2 ff ff eb 82 cc RSP: 002b:00007fc732163c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459f49 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc7321646d4 R13: 00000000004c30a8 R14: 00000000004d7018 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1070: #0: ffffffff888d4040 (rcu_read_lock){....}, at: rcu_lock_acquire+0x4/0x30 include/linux/rcupdate.h:207 1 lock held by rsyslogd/7600: #0: ffff88809271f360 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x243/0x2e0 fs/file.c:801 2 locks held by getty/7690: #0: ffff88809cbce090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272 #1: ffffc90005f192e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156 2 locks held by getty/7691: #0: ffff8880a3fc7090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272 #1: ffffc90005f372e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156 2 locks held by getty/7692: #0: ffff88809ca3f090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272 #1: ffffc90005f252e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156 2 locks held by getty/7693: #0: ffff88809c938090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272 #1: ffffc90005f292e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156 2 locks held by getty/7694: #0: ffff88808ef86090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272 #1: ffffc90005f212e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156 2 locks held by getty/7695: #0: ffff8880a565d090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272 #1: ffffc90005f3b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156 2 locks held by getty/7696: #0: ffff88809a40e090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272 #1: ffffc90005f092e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1070 Comm: khungtaskd Not tainted 5.4.0-rc5+ #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+0x1d8/0x2f8 lib/dump_stack.c:113 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace+0x17/0x20 include/linux/nmi.h:146 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xbb9/0xbd0 kernel/hung_task.c:289 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc5+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:98 Code: 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d c4 20 4b 07 48 89 de e8 84 ce 38 00 5b 5d c3 90 <48> 8b 04 24 65 48 8b 0c 25 c0 fd 01 00 65 8b 15 88 b9 8e 7e f7 c2 RSP: 0018:ffff8880aeb09910 EFLAGS: 00000296 RAX: ffffffff8773fafd RBX: ffff8880a991eba0 RCX: 0000000000000002 RDX: 0000000000000040 RSI: ffff8880aeb20518 RDI: ffff8880a991eba0 RBP: ffff8880aeb09958 R08: ffffffff8773faee R09: ffff8880aeb09c20 R10: ffffed1015d6138e R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000002 R14: 0000000000000040 R15: ffff8880aeb20518 FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000a5a77000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cpumask_next_and+0x52/0x70 lib/cpumask.c:40 update_sg_lb_stats kernel/sched/fair.c:8003 [inline] update_sd_lb_stats kernel/sched/fair.c:8200 [inline] find_busiest_group kernel/sched/fair.c:8485 [inline] load_balance+0x146e/0x5f00 kernel/sched/fair.c:8804 rebalance_domains+0x49b/0x790 kernel/sched/fair.c:9230 _nohz_idle_balance+0x482/0x530 kernel/sched/fair.c:9643 nohz_idle_balance kernel/sched/fair.c:9689 [inline] run_rebalance_domains+0x165/0x290 kernel/sched/fair.c:9873 __do_softirq+0x333/0x7c4 arch/x86/include/asm/paravirt.h:766 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x227/0x230 kernel/softirq.c:413 scheduler_ipi+0x444/0x4a0 kernel/sched/core.c:2347 smp_reschedule_interrupt+0x7a/0xa0 arch/x86/kernel/smp.c:244 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:854 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 Code: 31 fa eb ae 89 d9 80 e1 07 80 c1 03 38 c1 7c ba 48 89 df e8 04 ba 31 fa eb b0 90 90 e9 07 00 00 00 0f 00 2d 66 d4 47 00 fb f4 90 e9 07 00 00 00 0f 00 2d 56 d4 47 00 f4 c3 90 90 55 48 89 e5 RSP: 0018:ffff8880a98cfe10 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02 RAX: 1ffffffff1115241 RBX: ffff8880a98bc340 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff812b7f3a RDI: ffff8880a98bcb84 RBP: ffff8880a98cfe18 R08: ffff8880a98bcb98 R09: ffffed1015317869 R10: ffffed1015317869 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff11015317868 R14: dffffc0000000000 R15: 1ffffffff111523f arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571 default_idle_call+0x59/0xa0 kernel/sched/idle.c:94 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x140/0x670 kernel/sched/idle.c:263 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:355 start_secondary+0x384/0x410 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241