ip6_tunnel: n xmit: Local address not yet configured! ip6_tunnel: ¸ xmit: Local address not yet configured! INFO: task syz-executor.2:9143 blocked for more than 140 seconds. Not tainted 4.9.194+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D25544 9143 1 0x00000004 0000000000000087 ffff8801a7a22f80 ffff8801d3c24200 ffff8801db621000 ffff8801a452df00 ffff8801db621018 ffff8801aa3d76a8 ffffffff8281af8e 0000000000000246 ffffffff831f3ca8 00ff8801a7a23828 ffff8801db6218f0 Call Trace: [<000000004a63d460>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<00000000757e5123>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<0000000033fd026e>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<0000000033fd026e>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<000000002a945242>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 [<00000000ea822aa3>] blkdev_get+0x2e8/0x920 fs/block_dev.c:1424 [<000000006dcc6428>] blkdev_open+0x1aa/0x250 fs/block_dev.c:1579 [<00000000a542a2eb>] do_dentry_open+0x422/0xd20 fs/open.c:791 [<0000000003fb244f>] vfs_open+0x105/0x230 fs/open.c:904 [<000000006b68daa5>] do_last fs/namei.c:3541 [inline] [<000000006b68daa5>] path_openat+0xbf5/0x2f60 fs/namei.c:3665 [<000000008ae267d6>] do_filp_open+0x1a1/0x280 fs/namei.c:3699 [<000000005889f15d>] do_sys_open+0x2f0/0x610 fs/open.c:1097 [<00000000c6fc2b76>] SYSC_open fs/open.c:1115 [inline] [<00000000c6fc2b76>] SyS_open+0x2d/0x40 fs/open.c:1110 [<000000002fa22443>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000fd404e81>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 2 locks held by khungtaskd/24: #0: (rcu_read_lock){......}, at: [<0000000099f613e9>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<0000000099f613e9>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.?..}, at: [<000000003e264215>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/1895: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000049822ac>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2022: #0: (&tty->ldisc_sem){++++++}, at: [<00000000363125ee>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.+.}, at: [<00000000dee87b51>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.2/9143: #0: (&bdev->bd_mutex){+.+.+.}, at: [<000000002a945242>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 2 locks held by syz-executor.1/15357: #0: (&bdev->bd_mutex){+.+.+.}, at: [<000000002a945242>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (loop_index_mutex){+.+.+.}, at: [<00000000d6589d6a>] lo_open+0x1d/0xb0 drivers/block/loop.c:1621 2 locks held by syz-executor.4/15799: #0: (&bdev->bd_mutex){+.+.+.}, at: [<000000002a945242>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (loop_index_mutex){+.+.+.}, at: [<00000000d6589d6a>] lo_open+0x1d/0xb0 drivers/block/loop.c:1621 2 locks held by blkid/16389: #0: (&bdev->bd_mutex){+.+.+.}, at: [<000000005d67bdc0>] __blkdev_put+0xbb/0x840 fs/block_dev.c:1587 #1: (loop_index_mutex){+.+.+.}, at: [<00000000e50dca3a>] lo_release+0x20/0x1b0 drivers/block/loop.c:1663 2 locks held by syz-executor.5/16392: #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<000000006406980a>] lo_ioctl+0x8e/0x1b10 drivers/block/loop.c:1404 #1: (&bdev->bd_mutex){+.+.+.}, at: [<00000000cdd251b1>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:189 1 lock held by syz-executor.5/16410: #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<000000006406980a>] lo_ioctl+0x8e/0x1b10 drivers/block/loop.c:1404 1 lock held by syz-executor.0/16400: #0: (loop_index_mutex){+.+.+.}, at: [<0000000008c18f01>] loop_control_ioctl+0x7a/0x320 drivers/block/loop.c:1973 1 lock held by syz-executor.0/16414: #0: (loop_index_mutex){+.+.+.}, at: [<0000000008c18f01>] loop_control_ioctl+0x7a/0x320 drivers/block/loop.c:1973 2 locks held by syz-executor.3/16395: #0: (loop_index_mutex){+.+.+.}, at: [<0000000008c18f01>] loop_control_ioctl+0x7a/0x320 drivers/block/loop.c:1973 #1: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [<00000000ce317c65>] loop_control_ioctl+0x17f/0x320 drivers/block/loop.c:1987 2 locks held by blkid/16396: #0: (&bdev->bd_mutex){+.+.+.}, at: [<000000002a945242>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (loop_index_mutex){+.+.+.}, at: [<00000000d6589d6a>] lo_open+0x1d/0xb0 drivers/block/loop.c:1621 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.194+ #0 ffff8801d98d7cc8 ffffffff81b67001 0000000000000001 0000000000000000 0000000000000001 ffffffff81099d01 dffffc0000000000 ffff8801d98d7d00 ffffffff81b7229c 0000000000000001 0000000000000000 0000000000000001 Call Trace: [<00000000877d6a92>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000877d6a92>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000009343bf4f>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<00000000606ab3cd>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<00000000e9f33b24>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<0000000072a41e01>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<0000000072a41e01>] check_hung_task kernel/hung_task.c:126 [inline] [<0000000072a41e01>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<0000000072a41e01>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<0000000044c742c9>] kthread+0x278/0x310 kernel/kthread.c:211 [<000000004ad487ce>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff8282a0e1