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: ip6tnl2 xmit: Local address not yet configured! ip6_tunnel: ip6tnl3 xmit: Local address not yet configured! INFO: task syz-executor2:31692 blocked for more than 140 seconds. Not tainted 4.14.87+ #21 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D26648 31692 1844 0x10000004 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 flush_work+0x3b8/0x6e0 kernel/workqueue.c:2885 drain_all_pages+0x38f/0x550 mm/page_alloc.c:2548 __alloc_pages_direct_reclaim mm/page_alloc.c:3628 [inline] __alloc_pages_slowpath mm/page_alloc.c:4011 [inline] __alloc_pages_nodemask+0xbe5/0x2280 mm/page_alloc.c:4220 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] __page_cache_alloc include/linux/pagemap.h:226 [inline] __do_page_cache_readahead+0x249/0x950 mm/readahead.c:183 ra_submit mm/internal.h:66 [inline] ondemand_readahead+0x49c/0xb30 mm/readahead.c:486 page_cache_async_readahead+0x23f/0x3d0 mm/readahead.c:562 do_async_mmap_readahead mm/filemap.c:2366 [inline] filemap_fault+0xe8f/0x14a0 mm/filemap.c:2418 ext4_filemap_fault+0x7d/0xb0 fs/ext4/inode.c:6179 __do_fault+0x80/0x210 mm/memory.c:3194 do_read_fault mm/memory.c:3604 [inline] do_fault mm/memory.c:3730 [inline] handle_pte_fault mm/memory.c:3960 [inline] __handle_mm_fault+0x991/0x25f0 mm/memory.c:4084 handle_mm_fault+0x3d5/0x6eb mm/memory.c:4121 faultin_page mm/gup.c:502 [inline] __get_user_pages+0x35d/0xe20 mm/gup.c:702 populate_vma_page_range+0x17a/0x210 mm/gup.c:1219 __mm_populate+0x1bf/0x300 mm/gup.c:1267 mm_populate include/linux/mm.h:2176 [inline] SYSC_mlockall mm/mlock.c:816 [inline] SyS_mlockall+0x3e2/0x510 mm/mlock.c:790 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457679 RSP: 002b:00007fec97f3ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000457679 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fec97f3f6d4 R13: 00000000004c2d55 R14: 00000000004d5080 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/1754: #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 syz-executor4/20509: #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 3 locks held by syz-executor2/31692: #0: (&mm->mmap_sem){++++}, at: [] __mm_populate+0x206/0x300 mm/gup.c:1247 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 #2: (pcpu_drain_mutex){+.+.}, at: [] drain_all_pages+0x4a/0x550 mm/page_alloc.c:2505 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.87+ #21 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: 31706 Comm: syz-executor5 Not tainted 4.14.87+ #21 task: ffff8881cc138000 task.stack: ffff8881d8d28000 RIP: 0033:0x401674 RSP: 002b:00007f02ab8a0690 EFLAGS: 00000282 RAX: 00000000d3568958 RBX: 000000000000000b RCX: 0000000000457679 RDX: 0000000000000000 RSI: 00007f02ab8a06c0 RDI: 000000000000000b RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f02ab8a1700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f02ab85edb8 CR3: 00000001cacfc005 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600