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! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: ip6tnl2 xmit: Local address not yet configured! INFO: task kworker/u4:7:6346 blocked for more than 140 seconds. Not tainted 4.14.87+ #19 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:7 D26224 6346 2 0x80000000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_timeout+0x710/0xe60 kernel/time/timer.c:1721 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x3bc/0x4e0 kernel/sched/completion.c:123 __synchronize_srcu+0x121/0x200 kernel/rcu/srcutree.c:898 fsnotify_connector_destroy_workfn+0x3f/0xa0 fs/notify/mark.c:156 process_one_work+0x86e/0x1670 kernel/workqueue.c:2114 worker_thread+0xdc/0x1000 kernel/workqueue.c:2248 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 INFO: task kworker/u4:8:6353 blocked for more than 140 seconds. Not tainted 4.14.87+ #19 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:8 D26360 6353 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_timeout+0x710/0xe60 kernel/time/timer.c:1721 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x3bc/0x4e0 kernel/sched/completion.c:123 __synchronize_srcu+0x121/0x200 kernel/rcu/srcutree.c:898 fsnotify_mark_destroy_workfn+0xfc/0x310 fs/notify/mark.c:757 process_one_work+0x86e/0x1670 kernel/workqueue.c:2114 worker_thread+0xdc/0x1000 kernel/workqueue.c:2248 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 INFO: task syz-executor2:29094 blocked for more than 140 seconds. Not tainted 4.14.87+ #19 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D28168 29094 1844 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_timeout+0x710/0xe60 kernel/time/timer.c:1721 io_schedule_timeout+0x26/0x80 kernel/sched/core.c:5085 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common_io.constprop.2+0x266/0x3e0 kernel/sched/completion.c:129 submit_bio_wait+0x101/0x160 block/bio.c:954 blkdev_issue_zeroout+0x217/0x4c0 block/blk-lib.c:392 blkdev_fallocate+0x298/0x3b0 fs/block_dev.c:2009 vfs_fallocate+0x346/0x700 fs/open.c:328 SYSC_fallocate fs/open.c:351 [inline] SyS_fallocate+0x4b/0x80 fs/open.c:345 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457659 RSP: 002b:00007effd3b63c78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457659 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000100000001 R11: 0000000000000246 R12: 00007effd3b646d4 R13: 00000000004bddec R14: 00000000004cd998 R15: 00000000ffffffff INFO: task syz-executor2:29138 blocked for more than 140 seconds. Not tainted 4.14.87+ #19 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D28584 29138 1844 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_timeout+0x710/0xe60 kernel/time/timer.c:1721 io_schedule_timeout+0x26/0x80 kernel/sched/core.c:5085 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common_io.constprop.2+0x266/0x3e0 kernel/sched/completion.c:129 submit_bio_wait+0x101/0x160 block/bio.c:954 blkdev_issue_zeroout+0x217/0x4c0 block/blk-lib.c:392 blkdev_fallocate+0x298/0x3b0 fs/block_dev.c:2009 vfs_fallocate+0x346/0x700 fs/open.c:328 SYSC_fallocate fs/open.c:351 [inline] SyS_fallocate+0x4b/0x80 fs/open.c:345 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457659 RSP: 002b:00007effd3b21c78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457659 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000005 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000100000001 R11: 0000000000000246 R12: 00007effd3b226d4 R13: 00000000004bddec R14: 00000000004cd998 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 2 locks held by getty/1755: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x1700 drivers/tty/n_tty.c:2156 2 locks held by kworker/u4:7/6346: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: (connector_reaper_work){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 2 locks held by kworker/u4:8/6353: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((reaper_work).work){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 3 locks held by kworker/u4:21/12620: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 #2: (net_mutex){+.+.}, at: [] cleanup_net+0x14c/0x880 net/core/net_namespace.c:449 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.87+ #19 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x574/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5627 Comm: loop0 Not tainted 4.14.87+ #19 task: ffff8881c6a50000 task.stack: ffff88819d880000 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:60 RSP: 0018:ffff88819d887540 EFLAGS: 00000287 RAX: ffff8881c6a50000 RBX: 0000000000000009 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: dffffc0000000000 RBP: ffff88819156af28 R08: 0000000000000000 R09: 0000000000000000 R10: ffff8881c6a50858 R11: 0000000000000001 R12: ffffffffffffffc0 R13: 0000000000000000 R14: ffff88819156aec0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa510325000 CR3: 00000000b7e26005 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: radix_tree_next_chunk+0x331/0x800 lib/radix-tree.c:1767 find_get_entries+0x4a7/0x7e0 mm/filemap.c:1535 pagevec_lookup_entries+0x35/0x70 mm/swap.c:933 invalidate_inode_pages2_range+0x192/0x960 mm/truncate.c:639 generic_file_direct_write+0x358/0x430 mm/filemap.c:2956 __generic_file_write_iter+0x213/0x540 mm/filemap.c:3119 ext4_file_write_iter+0x4f6/0xe20 fs/ext4/file.c:264 call_write_iter include/linux/fs.h:1784 [inline] lo_rw_aio+0x97b/0x1050 drivers/block/loop.c:540 do_req_filebacked drivers/block/loop.c:582 [inline] loop_handle_cmd drivers/block/loop.c:1737 [inline] loop_queue_work+0x14c9/0x1e9a drivers/block/loop.c:1751 kthread_worker_fn+0x27e/0x6a0 kernel/kthread.c:642 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Code: 00 e9 9f fe ff ff 4c 89 e7 e8 f4 02 22 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 de 01 00 <48> 85 c0 74 1a 65 8b 15 9b f7 d0 7b 81 e2 00 01 1f 00 75 0b 8b