ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! INFO: task syz-executor.4:21971 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D25568 21971 10076 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:572 [inline] rwsem_down_write_failed+0x3b1/0x760 kernel/locking/rwsem-xadd.c:601 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 inode_lock include/linux/fs.h:715 [inline] ext4_file_write_iter+0x1fe/0xe10 fs/ext4/file.c:233 call_write_iter include/linux/fs.h:1784 [inline] do_iter_readv_writev+0x379/0x580 fs/read_write.c:678 do_iter_write fs/read_write.c:957 [inline] do_iter_write+0x152/0x550 fs/read_write.c:938 vfs_iter_write+0x70/0xa0 fs/read_write.c:970 iter_file_splice_write+0x560/0xa50 fs/splice.c:749 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x118/0x160 fs/splice.c:1018 splice_direct_to_actor+0x292/0x760 fs/splice.c:973 do_splice_direct+0x177/0x240 fs/splice.c:1061 do_sendfile+0x493/0xb20 fs/read_write.c:1438 SYSC_sendfile64 fs/read_write.c:1493 [inline] SyS_sendfile64+0xab/0x140 fs/read_write.c:1485 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by getty/1761: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.4/21971: #0: (sb_writers#4){.+.+}, at: [] file_start_write include/linux/fs.h:2726 [inline] #0: (sb_writers#4){.+.+}, at: [] do_sendfile+0x88f/0xb20 fs/read_write.c:1437 #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] inode_lock include/linux/fs.h:715 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] ext4_file_write_iter+0x1fe/0xe10 fs/ext4/file.c:233 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.105+ #29 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17880 Comm: syz-executor.1 Not tainted 4.14.105+ #29 task: ffff8881cfdfde00 task.stack: ffff8881c8a70000 RIP: 0010:__skb_try_recv_from_queue+0x2/0x7b0 net/core/datagram.c:172 RSP: 0018:ffff8881c8a77a18 EFLAGS: 00000046 RAX: 0000000000000297 RBX: ffff88819f314fc0 RCX: 0000000000000000 RDX: 0000000000010062 RSI: ffff88819f315148 RDI: ffff88819f314fc0 RBP: dffffc0000000000 R08: ffff8881c8a77ba8 R09: ffff8881c8a77bb8 R10: ffff8881cfdfe658 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88819f315148 R14: ffff88819f315160 R15: 0000000000000297 FS: 00007f9aa6aaa700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f43e1c38000 CR3: 000000018e054002 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __skb_try_recv_datagram+0x22e/0x3b0 net/core/datagram.c:272 unix_dgram_recvmsg+0x184/0xcf0 net/unix/af_unix.c:2107 sock_recvmsg_nosec net/socket.c:818 [inline] sock_recvmsg net/socket.c:825 [inline] sock_recvmsg+0xc2/0x100 net/socket.c:821 SYSC_recvfrom net/socket.c:1814 [inline] SyS_recvfrom+0x1a8/0x2e0 net/socket.c:1786 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 Code: e9 e8 fd ff ff 89 54 24 04 e8 7b 5e 24 ff 8b 54 24 04 e9 a9 fe ff ff e8 3d 5e 24 ff e9 6b ff ff ff 0f 1f 84 00 00 00 00 00 41 57 <49> 89 ff 41 56 49 89 ce 41 55 4d 89 cd 41 54 55 89 d5 53 48 89