ip6_tunnel: ù xmit: Local address not yet configured! ip6_tunnel: ø xmit: Local address not yet configured! ip6_tunnel: ™ xmit: Local address not yet configured! ip6_tunnel: × xmit: Local address not yet configured! INFO: task syz-executor.0:27393 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.0 D26632 27393 27099 0x00000004 0000000000000087 ffff8801d3a75f00 ffff8801a0c50b00 ffff8801db721000 ffff8801d7772f80 ffff8801db721018 ffff8801a5c677c8 ffffffff8281af8e ffffffff830c3120 ffff8801a5c677e8 00ff8801a5c67718 ffff8801db7218f0 Call Trace: [<00000000a70eea29>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<0000000078e46206>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<0000000053189eca>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<0000000053189eca>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<000000007a3cbcc5>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:189 [<000000006db0eed4>] loop_reread_partitions+0x7c/0x90 drivers/block/loop.c:637 [<0000000013991e8f>] loop_set_status+0xc02/0x1260 drivers/block/loop.c:1196 [<000000004f2119cb>] loop_set_status64+0xd7/0x130 drivers/block/loop.c:1305 [<00000000f05f9461>] lo_ioctl+0x4c7/0x1b10 drivers/block/loop.c:1430 [<000000001bd0f66f>] __blkdev_driver_ioctl block/ioctl.c:294 [inline] [<000000001bd0f66f>] blkdev_ioctl+0xe14/0x19e0 block/ioctl.c:590 [<0000000008df5b6a>] block_ioctl+0xde/0x120 fs/block_dev.c:1696 [<0000000023090ec8>] vfs_ioctl fs/ioctl.c:43 [inline] [<0000000023090ec8>] file_ioctl fs/ioctl.c:493 [inline] [<0000000023090ec8>] do_vfs_ioctl+0xb87/0x11d0 fs/ioctl.c:677 [<00000000d7faf059>] SYSC_ioctl fs/ioctl.c:694 [inline] [<00000000d7faf059>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 [<0000000058c60d87>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000b34574fe>] 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: [<00000000d027afd5>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<00000000d027afd5>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.?..}, at: [<00000000cc9e48f1>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/1897: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000eb188dc6>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2024: #0: (&tty->ldisc_sem){++++++}, at: [<00000000b2a5385b>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.+.}, at: [<0000000056264732>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.0/27393: #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<000000005f7984a2>] lo_ioctl+0x8e/0x1b10 drivers/block/loop.c:1404 #1: (&bdev->bd_mutex){+.+.+.}, at: [<000000007a3cbcc5>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:189 2 locks held by syz-executor.4/27416: #0: (loop_index_mutex){+.+.+.}, at: [<0000000080f7800e>] loop_control_ioctl+0x7a/0x320 drivers/block/loop.c:1973 #1: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [<000000005a2f6354>] loop_control_ioctl+0x17f/0x320 drivers/block/loop.c:1987 1 lock held by syz-executor.4/27421: #0: (loop_index_mutex){+.+.+.}, at: [<0000000080f7800e>] loop_control_ioctl+0x7a/0x320 drivers/block/loop.c:1973 2 locks held by blkid/27415: #0: (&bdev->bd_mutex){+.+.+.}, at: [<000000009234ea3c>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (loop_index_mutex){+.+.+.}, at: [<00000000f0574ead>] lo_open+0x1d/0xb0 drivers/block/loop.c:1621 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.194+ #0 ffff8801d98d7cc8 ffffffff81b67001 0000000000000000 0000000000000000 0000000000000000 ffffffff81099d01 dffffc0000000000 ffff8801d98d7d00 ffffffff81b7229c 0000000000000000 0000000000000000 0000000000000000 Call Trace: [<00000000c8128c1e>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000c8128c1e>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000008475027f>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<0000000084c69bce>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<00000000c9aacfc3>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<000000006b000927>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<000000006b000927>] check_hung_task kernel/hung_task.c:126 [inline] [<000000006b000927>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<000000006b000927>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<00000000effc2f55>] kthread+0x278/0x310 kernel/kthread.c:211 [<000000004dd42166>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff8282a0e1