INFO: task jbd2/sda1-8:2422 blocked for more than 140 seconds. Not tainted 4.19.0-rc2+ #226 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. jbd2/sda1-8 D16792 2422 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 io_schedule+0x1c/0x70 kernel/sched/core.c:5140 bit_wait_io+0x18/0x90 kernel/sched/wait_bit.c:207 __wait_on_bit+0xb3/0x130 kernel/sched/wait_bit.c:48 out_of_line_wait_on_bit+0x213/0x3c0 kernel/sched/wait_bit.c:63 wait_on_bit_io include/linux/wait_bit.h:101 [inline] __wait_on_buffer+0x76/0x90 fs/buffer.c:118 wait_on_buffer include/linux/buffer_head.h:354 [inline] journal_wait_on_commit_record fs/jbd2/commit.c:175 [inline] jbd2_journal_commit_transaction+0x5ea5/0x884d fs/jbd2/commit.c:866 kjournald2+0x274/0xb50 fs/jbd2/journal.c:229 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Showing all locks held in the system: 1 lock held by khungtaskd/792: #0: 00000000657b6126 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4436 1 lock held by rsyslogd/4509: 2 locks held by getty/4599: #0: 000000002c763f8a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000db367b48 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4600: #0: 00000000ec4a5a4a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000b8461536 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4601: #0: 000000001f6cdf92 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000006126b0a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4602: #0: 00000000b2c90a9d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000c0a8b902 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4603: #0: 00000000c841e2f7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000009c1fdf4b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4604: #0: 000000009db4567b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000009be2cd30 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4605: #0: 00000000a67dfd70 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000058e0e52a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 1 lock held by syz-executor3/17260: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 792 Comm: khungtaskd Not tainted 4.19.0-rc2+ #226 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+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x151/0x192 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+0xb39/0x1040 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: 1.316 msecs NMI backtrace for cpu 0 CPU: 0 PID: 17260 Comm: syz-executor3 Not tainted 4.19.0-rc2+ #226 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:x86_decode_insn+0x7b4/0x53e0 arch/x86/kvm/emulate.c:5178 Code: 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 42 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 16 4b 00 00 44 88 bb 23 01 00 00 e9 6d ff ff ff <41> 80 ff 64 0f 83 8f 0a 00 00 41 80 ff 36 0f 84 bf 05 00 00 0f 86 RSP: 0018:ffff880190b66be0 EFLAGS: 00000287 RAX: 0000000000000002 RBX: ffff88018bd7bda0 RCX: ffffffff8117244e RDX: 000000000000000f RSI: 00000000000000f3 RDI: 0000000000000001 RBP: ffff880190b66d38 R08: ffff880195734480 R09: 0000000000000001 R10: 0000000000001449 R11: 0000000000000000 R12: ffff88018bd7bfc1 R13: dffffc0000000000 R14: ffffed00317af7fb R15: 000000000000000f FS: 00007f9fa2da2700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001b52fb000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: x86_emulate_instruction+0x8ab/0x1e90 arch/x86/kvm/x86.c:6175 kvm_mmu_page_fault+0x342/0x19b0 arch/x86/kvm/mmu.c:5276 handle_ept_violation+0x27c/0x660 arch/x86/kvm/vmx.c:7679 vmx_handle_exit+0x2dd/0x1760 arch/x86/kvm/vmx.c:10115 vcpu_enter_guest+0x143c/0x61a0 arch/x86/kvm/x86.c:7630 vcpu_run arch/x86/kvm/x86.c:7693 [inline] kvm_arch_vcpu_ioctl_run+0x373/0x16d0 arch/x86/kvm/x86.c:7870 kvm_vcpu_ioctl+0x7b8/0x1280 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2590 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: fd 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9fa2da1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9fa2da26d4 RCX: 0000000000457099 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cf730 R14: 00000000004c59b9 R15: 0000000000000000