ip6_tunnel: € xmit: Local address not yet configured! ip6_tunnel: € 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.0:4913 blocked for more than 140 seconds. Not tainted 4.9.190+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D25544 4913 1 0x00000004 0000000000000083 ffff8801c9eddf00 0000000000000000 ffff8801db621000 ffff8801da682f80 ffff8801db621018 ffff8801a10d7988 ffffffff8281a10e ffffffff830c3120 ffff8801a10d79a8 00ff8801a10d78d8 ffff8801db6218f0 Call Trace: [<0000000082f3c13e>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<0000000009b0f341>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<000000004d5b2d1d>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<000000004d5b2d1d>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<000000003af0b194>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:189 [<000000009c9e3fa4>] loop_reread_partitions+0x7c/0x90 drivers/block/loop.c:637 [<00000000d8691ecc>] loop_clr_fd+0x7dd/0xa60 drivers/block/loop.c:1081 [<0000000043684f9d>] lo_ioctl+0x7e9/0x1b10 drivers/block/loop.c:1414 [<00000000ec6a7e0a>] __blkdev_driver_ioctl block/ioctl.c:294 [inline] [<00000000ec6a7e0a>] blkdev_ioctl+0xe14/0x19e0 block/ioctl.c:590 [<000000000b6c9518>] block_ioctl+0xde/0x120 fs/block_dev.c:1696 [<00000000f63b4abe>] vfs_ioctl fs/ioctl.c:43 [inline] [<00000000f63b4abe>] file_ioctl fs/ioctl.c:493 [inline] [<00000000f63b4abe>] do_vfs_ioctl+0xb87/0x11d0 fs/ioctl.c:677 [<000000005f176805>] SYSC_ioctl fs/ioctl.c:694 [inline] [<000000005f176805>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 [<00000000bcb4e7dc>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<0000000009c9bee6>] 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: [<00000000244bb374>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<00000000244bb374>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<00000000e6df04e9>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/1897: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000945f984a>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2024: #0: (&tty->ldisc_sem){++++++}, at: [<00000000a5bf64e3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.+.}, at: [<0000000012dcb7d0>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.5/4075: #0: (&tty->ldisc_sem){++++++}, at: [<00000000a5bf64e3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.+.}, at: [<0000000012dcb7d0>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.0/4913: #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<00000000a4f50e6c>] lo_ioctl+0x8e/0x1b10 drivers/block/loop.c:1404 #1: (&bdev->bd_mutex){+.+.+.}, at: [<000000003af0b194>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:189 2 locks held by syz-executor.1/8037: #0: (&bdev->bd_mutex){+.+.+.}, at: [<0000000074e0e5aa>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (loop_index_mutex){+.+.+.}, at: [<00000000b844e975>] lo_open+0x1d/0xb0 drivers/block/loop.c:1621 2 locks held by syz-executor.4/10907: #0: (loop_index_mutex){+.+.+.}, at: [<000000007946bbf5>] loop_control_ioctl+0x7a/0x320 drivers/block/loop.c:1973 #1: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [<00000000f7e663a9>] loop_control_ioctl+0x17f/0x320 drivers/block/loop.c:1987 1 lock held by syz-executor.4/10912: #0: (loop_index_mutex){+.+.+.}, at: [<000000007946bbf5>] loop_control_ioctl+0x7a/0x320 drivers/block/loop.c:1973 2 locks held by syz-executor.2/10911: #0: (&bdev->bd_mutex){+.+.+.}, at: [<0000000074e0e5aa>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (loop_index_mutex){+.+.+.}, at: [<00000000b844e975>] lo_open+0x1d/0xb0 drivers/block/loop.c:1621 1 lock held by syz-executor.2/10914: #0: (&bdev->bd_mutex){+.+.+.}, at: [<0000000074e0e5aa>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 2 locks held by blkid/10909: #0: (&bdev->bd_mutex){+.+.+.}, at: [<0000000074e0e5aa>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (loop_index_mutex){+.+.+.}, at: [<00000000b844e975>] lo_open+0x1d/0xb0 drivers/block/loop.c:1621 1 lock held by blkid/10910: #0: (&bdev->bd_mutex){+.+.+.}, at: [<0000000074e0e5aa>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.190+ #0 ffff8801d98d7cc8 ffffffff81b66c51 0000000000000001 0000000000000000 0000000000000001 ffffffff81099a01 dffffc0000000000 ffff8801d98d7d00 ffffffff81b71eec 0000000000000001 0000000000000000 0000000000000001 Call Trace: [<00000000189b9e48>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000189b9e48>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000348cdfbd>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<00000000767f578f>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<00000000744f6af5>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<000000003cf4a359>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<000000003cf4a359>] check_hung_task kernel/hung_task.c:126 [inline] [<000000003cf4a359>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<000000003cf4a359>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<0000000001e7700f>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000beaf4ec0>] 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 0xffffffff82829261