ip6_tunnel: ¬ xmit: Local address not yet configured! ip6_tunnel: ip6tnl2 xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: ip6tnl3 xmit: Local address not yet configured! INFO: task syz-executor.1:17742 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28272 17742 15835 0x80000002 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 lo_release+0x1b/0x1a0 drivers/block/loop.c:1666 __blkdev_put+0x518/0x6d0 fs/block_dev.c:1791 blkdev_close+0x86/0xb0 fs/block_dev.c:1863 __fput+0x25e/0x710 fs/file_table.c:210 task_work_run+0x125/0x1a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x9cb/0x2a20 kernel/exit.c:875 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459879 RSP: 002b:00007ff81a82fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000075c078 RCX: 0000000000459879 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075c078 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075c07c R13: 00007fff6240894f R14: 00007ff81a8309c0 R15: 000000000075c07c INFO: task syz-executor.4:17820 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D25312 17820 1 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1623 __blkdev_get+0x963/0xf90 fs/block_dev.c:1537 blkdev_get+0x97/0x8b0 fs/block_dev.c:1612 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770 do_dentry_open+0x44e/0xe20 fs/open.c:789 vfs_open+0x105/0x230 fs/open.c:903 do_last fs/namei.c:3455 [inline] path_openat+0xb6c/0x2be0 fs/namei.c:3597 do_filp_open+0x1a1/0x280 fs/namei.c:3631 do_sys_open+0x2ca/0x590 fs/open.c:1096 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413740 RSP: 002b:00007ffdb185ef18 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000078d88 RCX: 0000000000413740 RDX: 00007ffdb185efaa RSI: 0000000000000002 RDI: 00007ffdb185efa0 RBP: 000000000000026a R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdb185ef50 R14: 0000000000078d3f R15: 00007ffdb185ef60 INFO: task syz-executor.5:20731 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D25312 20731 1 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1623 __blkdev_get+0x267/0xf90 fs/block_dev.c:1472 blkdev_get+0x97/0x8b0 fs/block_dev.c:1612 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770 do_dentry_open+0x44e/0xe20 fs/open.c:789 vfs_open+0x105/0x230 fs/open.c:903 do_last fs/namei.c:3455 [inline] path_openat+0xb6c/0x2be0 fs/namei.c:3597 do_filp_open+0x1a1/0x280 fs/namei.c:3631 do_sys_open+0x2ca/0x590 fs/open.c:1096 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413740 RSP: 002b:00007fff2cc80a08 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000078d6f RCX: 0000000000413740 RDX: 00007fff2cc80a9a RSI: 0000000000000002 RDI: 00007fff2cc80a90 RBP: 00000000000000e5 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff2cc80a40 R14: 0000000000078d56 R15: 00007fff2cc80a50 INFO: task syz-executor.3:22288 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D25312 22288 22287 0x00000000 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 blkdev_get+0x97/0x8b0 fs/block_dev.c:1612 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770 do_dentry_open+0x44e/0xe20 fs/open.c:789 vfs_open+0x105/0x230 fs/open.c:903 do_last fs/namei.c:3455 [inline] path_openat+0xb6c/0x2be0 fs/namei.c:3597 do_filp_open+0x1a1/0x280 fs/namei.c:3631 do_sys_open+0x2ca/0x590 fs/open.c:1096 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413740 RSP: 002b:00007fff918529e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000063 RCX: 0000000000413740 RDX: 00007fff91852a7a RSI: 0000000000000002 RDI: 00007fff91852a70 RBP: 0000000000000064 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff91852a20 R14: 0000000000078d70 R15: 00007fff91852a30 INFO: task syz-executor.0:23193 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27888 23193 7872 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 loop_reread_partitions+0x7f/0x90 drivers/block/loop.c:614 loop_set_status+0xbff/0x11f0 drivers/block/loop.c:1183 loop_set_status64+0xa5/0x100 drivers/block/loop.c:1301 lo_ioctl+0xd1/0x1a30 drivers/block/loop.c:1431 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x8d0/0x1870 block/ioctl.c:594 block_ioctl+0xd9/0x120 fs/block_dev.c:1881 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4596e7 RSP: 002b:00007f7842ec69f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7842ec76d4 RCX: 00000000004596e7 RDX: 00007f7842ec6ab0 RSI: 0000000000004c04 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000004 R13: 0000000000000004 R14: 0000000000000005 R15: 00000000ffffffff INFO: task syz-executor.0:23207 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28432 23207 7872 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 blkdev_get+0x97/0x8b0 fs/block_dev.c:1612 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770 do_dentry_open+0x44e/0xe20 fs/open.c:789 vfs_open+0x105/0x230 fs/open.c:903 do_last fs/namei.c:3455 [inline] path_openat+0xb6c/0x2be0 fs/namei.c:3597 do_filp_open+0x1a1/0x280 fs/namei.c:3631 do_sys_open+0x2ca/0x590 fs/open.c:1096 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413761 RSP: 002b:00007f7842ea59f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f7842ea66d4 RCX: 0000000000413761 RDX: 00007f7842ea5baa RSI: 0000000000000002 RDI: 00007f7842ea5ba0 RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000004 R13: 0000000000000004 R14: 00007f7842ea66d4 R15: 00000000ffffffff INFO: task syz-executor.1:23196 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28448 23196 15835 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 loop_control_ioctl+0x183/0x310 drivers/block/loop.c:1996 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459879 RSP: 002b:00007ff81a871c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879 RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000007 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff81a8726d4 R13: 00000000004c2fd2 R14: 00000000004d6718 R15: 00000000ffffffff INFO: task syz-executor.1:23232 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28592 23232 15835 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1982 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459879 RSP: 002b:00007ff81a82fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879 RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000007 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff81a8306d4 R13: 00000000004c2fd2 R14: 00000000004d6718 R15: 00000000ffffffff INFO: task blkid:23199 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D28752 23199 16096 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1623 __blkdev_get+0x267/0xf90 fs/block_dev.c:1472 blkdev_get+0x97/0x8b0 fs/block_dev.c:1612 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770 do_dentry_open+0x44e/0xe20 fs/open.c:789 vfs_open+0x105/0x230 fs/open.c:903 do_last fs/namei.c:3455 [inline] path_openat+0xb6c/0x2be0 fs/namei.c:3597 do_filp_open+0x1a1/0x280 fs/namei.c:3631 do_sys_open+0x2ca/0x590 fs/open.c:1096 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f6029ddb120 RSP: 002b:00007ffe4f6c93d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6029ddb120 RDX: 00007ffe4f6caf34 RSI: 0000000000000000 RDI: 00007ffe4f6caf34 RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001993030 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 INFO: task blkid:23205 blocked for more than 140 seconds. Not tainted 4.14.140+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D28544 23205 18710 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 lo_open+0x19/0xb0 drivers/block/loop.c:1623 __blkdev_get+0x963/0xf90 fs/block_dev.c:1537 blkdev_get+0x97/0x8b0 fs/block_dev.c:1612 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770 do_dentry_open+0x44e/0xe20 fs/open.c:789 vfs_open+0x105/0x230 fs/open.c:903 do_last fs/namei.c:3455 [inline] path_openat+0xb6c/0x2be0 fs/namei.c:3597 do_filp_open+0x1a1/0x280 fs/namei.c:3631 do_sys_open+0x2ca/0x590 fs/open.c:1096 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7fe6ba183120 RSP: 002b:00007ffd8d40e888 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe6ba183120 RDX: 00007ffd8d40ff41 RSI: 0000000000000000 RDI: 00007ffd8d40ff41 RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001420030 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [<00000000297b5aa3>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/1631: #0: (&f->f_pos_lock){+.+.}, at: [<00000000684b0714>] __fdget_pos+0xb5/0xd0 fs/file.c:769 2 locks held by getty/1759: #0: (&tty->ldisc_sem){++++}, at: [<000000000bd5d700>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000009e0c5d6d>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.1/17742: #0: (&bdev->bd_mutex){+.+.}, at: [<0000000081cabe64>] __blkdev_put+0xb1/0x6d0 fs/block_dev.c:1778 #1: (loop_index_mutex){+.+.}, at: [<00000000622375d3>] lo_release+0x1b/0x1a0 drivers/block/loop.c:1666 2 locks held by syz-executor.4/17820: #0: (&bdev->bd_mutex){+.+.}, at: [<000000004fa1b3dd>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 #1: (loop_index_mutex){+.+.}, at: [<00000000cd0c4ed1>] lo_open+0x19/0xb0 drivers/block/loop.c:1623 2 locks held by syz-executor.5/20731: #0: (&bdev->bd_mutex){+.+.}, at: [<000000004fa1b3dd>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 #1: (loop_index_mutex){+.+.}, at: [<00000000cd0c4ed1>] lo_open+0x19/0xb0 drivers/block/loop.c:1623 1 lock held by syz-executor.3/22288: #0: (&bdev->bd_mutex){+.+.}, at: [<000000004fa1b3dd>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 2 locks held by syz-executor.0/23193: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [<000000001c2e74f8>] lo_ioctl+0x86/0x1a30 drivers/block/loop.c:1404 #1: (&bdev->bd_mutex){+.+.}, at: [<00000000e2bc489e>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 1 lock held by syz-executor.0/23207: #0: (&bdev->bd_mutex){+.+.}, at: [<000000004fa1b3dd>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 2 locks held by syz-executor.1/23196: #0: (loop_index_mutex){+.+.}, at: [<000000004d2b4125>] loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1982 #1: (&lo->lo_ctl_mutex#2){+.+.}, at: [<00000000411ee144>] loop_control_ioctl+0x183/0x310 drivers/block/loop.c:1996 1 lock held by syz-executor.1/23232: #0: (loop_index_mutex){+.+.}, at: [<000000004d2b4125>] loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1982 2 locks held by blkid/23199: #0: (&bdev->bd_mutex){+.+.}, at: [<000000004fa1b3dd>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 #1: (loop_index_mutex){+.+.}, at: [<00000000cd0c4ed1>] lo_open+0x19/0xb0 drivers/block/loop.c:1623 2 locks held by blkid/23205: #0: (&bdev->bd_mutex){+.+.}, at: [<000000004fa1b3dd>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 #1: (loop_index_mutex){+.+.}, at: [<00000000cd0c4ed1>] lo_open+0x19/0xb0 drivers/block/loop.c:1623 2 locks held by syz-executor.3/23210: #0: (&bdev->bd_mutex){+.+.}, at: [<000000004fa1b3dd>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 #1: (loop_index_mutex){+.+.}, at: [<00000000cd0c4ed1>] lo_open+0x19/0xb0 drivers/block/loop.c:1623 1 lock held by blkid/23273: #0: (&bdev->bd_mutex){+.+.}, at: [<000000004fa1b3dd>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.140+ #38 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x119/0x147 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x629/0xbe0 kernel/hung_task.c:274 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1629 Comm: rs:main Q:Reg Not tainted 4.14.140+ #38 task: 0000000082935bbe task.stack: 00000000c1f765f4 RIP: 0010:page_zonenum include/linux/mm.h:793 [inline] RIP: 0010:page_zone include/linux/mm.h:1047 [inline] RIP: 0010:inc_zone_page_state+0x0/0x130 mm/vmstat.c:455 RSP: 0018:ffff8881d478f390 EFLAGS: 00000297 RAX: ffff8881d48b1780 RBX: ffff8881da95d200 RCX: ffffffffa2a5afe5 RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffea0005ab6900 RBP: ffffea0005ab6900 R08: 0000000000000001 R09: fffffbfff495dd75 R10: fffffbfff495dd74 R11: 0000000000000003 R12: ffffea0005ab6938 R13: 0000000000000000 R14: ffff8881da81aa80 R15: ffff8881ce798400 FS: 00007f1529956700(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002669000 CR3: 00000001d5972002 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __test_set_page_writeback+0x53c/0xb50 mm/page-writeback.c:2813 set_page_writeback include/linux/page-flags.h:488 [inline] ext4_bio_write_page+0x141/0xdb2 fs/ext4/page-io.c:432 mpage_submit_page+0x128/0x220 fs/ext4/inode.c:2224 mpage_map_and_submit_buffers+0x417/0x6f0 fs/ext4/inode.c:2421 mpage_map_and_submit_extent fs/ext4/inode.c:2559 [inline] ext4_writepages+0x17a1/0x30a0 fs/ext4/inode.c:2891 do_writepages+0xe5/0x280 mm/page-writeback.c:2348 __filemap_fdatawrite_range+0x1a4/0x290 mm/filemap.c:347 file_write_and_wait_range+0x84/0x100 mm/filemap.c:677 __generic_file_fsync+0x70/0x190 fs/libfs.c:977 ext4_sync_file+0x3ac/0x1250 fs/ext4/fsync.c:120 vfs_fsync_range+0x106/0x260 fs/sync.c:196 generic_write_sync include/linux/fs.h:2699 [inline] ext4_file_write_iter+0x883/0xdb0 fs/ext4/file.c:279 call_write_iter include/linux/fs.h:1788 [inline] new_sync_write fs/read_write.c:471 [inline] __vfs_write+0x401/0x5a0 fs/read_write.c:484 vfs_write+0x17f/0x4d0 fs/read_write.c:546 SYSC_write fs/read_write.c:594 [inline] SyS_write+0x102/0x250 fs/read_write.c:586 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f152b3b419d RSP: 002b:00007f1529954f90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000400 RCX: 00007f152b3b419d RDX: 0000000000000400 RSI: 0000000002662ce0 RDI: 0000000000000002 RBP: 0000000002662ce0 R08: 00000000026afc40 R09: 302038312079614d R10: 2035303a37333a33 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f1529955410 R14: 00000000026afc40 R15: 0000000002662ae0 Code: a1 a4 48 83 c4 10 5b 5d 41 5c c3 48 89 54 24 08 89 74 24 04 e8 92 db 09 00 48 8b 54 24 08 8b 74 24 04 e9 4e ff ff ff 0f 1f 40 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 41 54 48 c1 ea 03 55 53