ip6_tunnel: ip6tnl4 xmit: Local address not yet configured! ip6_tunnel: ip6tnl5 xmit: Local address not yet configured! ip6_tunnel: ip6tnl3 xmit: Local address not yet configured! INFO: task syz-executor4:1849 blocked for more than 140 seconds. Not tainted 4.14.85+ #15 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D27928 1849 1785 0x90000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:565 [inline] rwsem_down_write_failed+0x390/0x730 kernel/locking/rwsem-xadd.c:594 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:470 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:157 free_pgtables+0x7c/0x220 mm/memory.c:630 exit_mmap+0x208/0x420 mm/mmap.c:3069 __mmput kernel/fork.c:929 [inline] mmput+0xc8/0x350 kernel/fork.c:950 exit_mm kernel/exit.c:544 [inline] do_exit+0x843/0x28c0 kernel/exit.c:852 do_group_exit+0x100/0x2e0 kernel/exit.c:968 get_signal+0x4e5/0x1470 kernel/signal.c:2348 do_signal+0x8f/0x1660 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0x116/0x150 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:267 [inline] do_syscall_64+0x35d/0x4b0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x41124a RSP: 002b:00007fff53e022a8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 000000000000073e RCX: 000000000041124a RDX: 0000000040000000 RSI: 00007fff53e022b4 RDI: ffffffffffffffff RBP: 000000000072c988 R08: 0000000000000739 R09: 000000000195b940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000010 R13: 0000000000412e50 R14: 0000000000000000 R15: 0000000000000000 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/1765: #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 1 lock held by syz-executor4/1849: #0: (&mapping->i_mmap_rwsem){++++}, at: [] i_mmap_lock_write include/linux/fs.h:470 [inline] #0: (&mapping->i_mmap_rwsem){++++}, at: [] unlink_file_vma+0x6e/0xa0 mm/mmap.c:157 2 locks held by syz-executor1/24738: #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 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.85+ #15 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: 11212 Comm: syz-executor0 Not tainted 4.14.85+ #15 task: ffff888196b0c680 task.stack: ffff8881c96a8000 RIP: 0033:0x4015b4 RSP: 002b:00007f2d498a9b50 EFLAGS: 00000202 RAX: 000000000e50bc98 RBX: 000000000000001b RCX: 0000000000457569 RDX: 0000000000410f61 RSI: 0000000000a44bf0 RDI: 0000000000000043 RBP: 00000000004bc231 R08: 000000000000000c R09: 0000000000000000 R10: 00007f2d498aa700 R11: 0000000000000246 R12: 0000000000000026 R13: 00000000004c5720 R14: 00000000004d9790 R15: 00000000ffffffff FS: 00007f2d498aa700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000123c000 CR3: 0000000168aa0006 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600