ip6_tunnel: l0 xmit: Local address not yet configured! ip6_tunnel: l0 xmit: Local address not yet configured! ip6_tunnel: l0 xmit: Local address not yet configured! ip6_tunnel: l0 xmit: Local address not yet configured! ip6_tunnel: l0 xmit: Local address not yet configured! INFO: task syz-executor.5:28645 blocked for more than 140 seconds. Not tainted 4.14.108+ #37 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D24544 28645 21816 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:276 [inline] rwsem_down_read_failed+0x21f/0x3c0 kernel/locking/rwsem-xadd.c:293 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x45/0xa0 kernel/locking/rwsem.c:26 inode_lock_shared include/linux/fs.h:725 [inline] ext4_direct_IO_read fs/ext4/inode.c:3798 [inline] ext4_direct_IO+0x546/0x2800 fs/ext4/inode.c:3862 generic_file_read_iter+0x24a/0x1a90 mm/filemap.c:2257 ext4_file_read_iter+0x119/0x180 fs/ext4/file.c:75 call_read_iter include/linux/fs.h:1778 [inline] generic_file_splice_read+0x30d/0x540 fs/splice.c:307 do_splice_to+0xfd/0x150 fs/splice.c:880 splice_direct_to_actor+0x21a/0x760 fs/splice.c:952 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 INFO: task syz-executor.5:28724 blocked for more than 140 seconds. Not tainted 4.14.108+ #37 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28256 28724 21816 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __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] do_truncate2+0x10c/0x1e0 fs/open.c:61 handle_truncate fs/namei.c:3039 [inline] do_last fs/namei.c:3464 [inline] path_openat+0x1208/0x2b70 fs/namei.c:3597 do_filp_open+0x1a1/0x280 fs/namei.c:3631 do_sys_open+0x2ca/0x590 fs/open.c:1071 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 INFO: task syz-executor.5:28726 blocked for more than 140 seconds. Not tainted 4.14.108+ #37 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28624 28726 21816 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __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] do_truncate2+0x10c/0x1e0 fs/open.c:61 do_sys_ftruncate.constprop.0+0x34f/0x4a0 fs/open.c:214 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/1756: #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.5/28645: #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_shared include/linux/fs.h:725 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] ext4_direct_IO_read fs/ext4/inode.c:3798 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] ext4_direct_IO+0x546/0x2800 fs/ext4/inode.c:3862 2 locks held by syz-executor.5/28724: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1545 [inline] #0: (sb_writers#4){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:387 #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: [] do_truncate2+0x10c/0x1e0 fs/open.c:61 2 locks held by syz-executor.5/28726: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1545 [inline] #0: (sb_writers#4){.+.+}, at: [] do_sys_ftruncate.constprop.0+0x21c/0x4a0 fs/open.c:209 #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: [] do_truncate2+0x10c/0x1e0 fs/open.c:61 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.108+ #37 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: 27054 Comm: syz-executor.2 Not tainted 4.14.108+ #37 task: ffff88816bf01780 task.stack: ffff8880a2b18000 RIP: 0033:0x4015a4 RSP: 002b:00007f1abfffb690 EFLAGS: 00000206 RAX: 0000000040b10e47 RBX: 000000000000000b RCX: 0000000000458209 RDX: 0000000000000000 RSI: 00007f1abfffb6c0 RDI: 000000000000000b RBP: 0000000000000000 R08: 0000000500000004 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000008f2ffd49ea R13: fdd61575b6ffbbc4 R14: 745124d7a9acdd52 R15: eae4a098eb205853 FS: 00007f1abfffc700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4d0e91a518 CR3: 000000009388e006 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600