ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: ³ xmit: Local address not yet configured! ip6_tunnel: ³ 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.1:8744 blocked for more than 140 seconds. Not tainted 4.9.170+ #48 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D25768 8744 1 0x10000004 ffff8801a3985f00 0000000000000000 ffff8801db721000 ffff8801da6f2f80 ffff8801db721018 ffff8801abaef988 ffffffff82801a4e 0000000000000000 ffffffff830c1d40 00ff8801abaef9b0 ffff8801db7218f0 1ffff1003575df20 Call Trace: [<00000000221972b2>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<000000007f8e9bc0>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<000000009c687fb1>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<000000009c687fb1>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<000000008670ce30>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:189 [<0000000038dc52ca>] loop_reread_partitions+0x7c/0x90 drivers/block/loop.c:638 [<00000000356ec039>] loop_clr_fd+0x7dd/0xa60 drivers/block/loop.c:1082 [<00000000a5f0b3e5>] lo_ioctl+0x7b6/0x1a10 drivers/block/loop.c:1415 [<00000000b9b3d9be>] __blkdev_driver_ioctl block/ioctl.c:294 [inline] [<00000000b9b3d9be>] blkdev_ioctl+0xe14/0x19e0 block/ioctl.c:590 [<000000006e45f990>] block_ioctl+0xde/0x120 fs/block_dev.c:1696 [<00000000e2697af9>] vfs_ioctl fs/ioctl.c:43 [inline] [<00000000e2697af9>] file_ioctl fs/ioctl.c:493 [inline] [<00000000e2697af9>] do_vfs_ioctl+0xb87/0x11d0 fs/ioctl.c:677 [<000000000ab11114>] SYSC_ioctl fs/ioctl.c:694 [inline] [<000000000ab11114>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 [<00000000c4c846a8>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285 [<00000000e05b8774>] 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: [<000000002ecb4d2a>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<000000002ecb4d2a>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<00000000057829fc>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4339 2 locks held by getty/2023: #0: (&tty->ldisc_sem){++++++}, at: [<00000000c3a64fb2>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+...}, at: [<0000000067c2269e>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.1/8744: #0: (loop_ctl_mutex/1){+.+.+.}, at: [<00000000475c7e14>] lo_ioctl+0x85/0x1a10 drivers/block/loop.c:1405 #1: (&bdev->bd_mutex){+.+.+.}, at: [<000000008670ce30>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:189 1 lock held by syz-executor.4/16757: #0: (&bdev->bd_mutex){+.+.+.}, at: [<000000001a185ca3>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 3 locks held by blkid/24740: #0: (&bdev->bd_mutex){+.+.+.}, at: [<0000000086fecd64>] __blkdev_put+0xbb/0x840 fs/block_dev.c:1587 #1: (loop_index_mutex){+.+.+.}, at: [<00000000b1a5b5a8>] lo_release+0x1e/0x1b0 drivers/block/loop.c:1664 #2: (loop_ctl_mutex#2){+.+.+.}, at: [<00000000cc5d942a>] __lo_release drivers/block/loop.c:1642 [inline] #2: (loop_ctl_mutex#2){+.+.+.}, at: [<00000000cc5d942a>] lo_release+0x84/0x1b0 drivers/block/loop.c:1665 2 locks held by blkid/24749: #0: (&bdev->bd_mutex){+.+.+.}, at: [<000000001a185ca3>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273 #1: (loop_index_mutex){+.+.+.}, at: [<00000000770555ad>] lo_open+0x1d/0xb0 drivers/block/loop.c:1622 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.170+ #48 ffff8801d98d7cc8 ffffffff81b4fb21 0000000000000000 0000000000000000 0000000000000000 ffffffff81097401 dffffc0000000000 ffff8801d98d7d00 ffffffff81b5adbc 0000000000000000 0000000000000000 0000000000000000 Call Trace: [<00000000cb18283d>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000cb18283d>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000a93a5f4d>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<000000008a29d127>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<000000003d7e13d2>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<0000000077f042ec>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<0000000077f042ec>] check_hung_task kernel/hung_task.c:126 [inline] [<0000000077f042ec>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<0000000077f042ec>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<00000000465397ee>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000b25c181c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.170+ #48 task: 0000000087ad8aae task.stack: 000000009069f597 RIP: 0010:[] c [<0000000017cf0938>] perf_trace_lock_acquire+0x8c/0x530 include/trace/events/lock.h:12 RSP: 0018:ffff8801db707dc8 EFLAGS: 00000082 RAX: 84a8e18251b85237 RBX: ffff8801c773b088 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff830df588 RDI: ffffffff830c1e80 RBP: ffff8801db707eb8 R08: 0000000000000002 R09: 0000000000000001 R10: 0000000000000001 R11: ffffffff811ffe30 R12: ffffffff830c1e00 R13: ffffffff830df588 R14: ffff8801db707e90 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001d7d000 CR3: 00000001cf653000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: 0000014d702c1ee1c ffffffff8109f8c0c ffffffff8108f62dc 0000000200000003c 0000000000000000c ffff8801db707e90c ffffffff8128f792c 1ffff1003b6e0fc2c 0000000041b58ab3c 0000000041b58ab3c ffffffff82e28708c ffffffff811ffe30c Call Trace: [<0000000042500403>] trace_lock_acquire include/trace/events/lock.h:12 [inline] [<0000000042500403>] lock_acquire+0x29a/0x3d0 kernel/locking/lockdep.c:3758 [<00000000da5a94c0>] seqcount_lockdep_reader_access include/linux/seqlock.h:80 [inline] [<00000000da5a94c0>] read_seqcount_begin include/linux/seqlock.h:163 [inline] [<00000000da5a94c0>] ktime_get kernel/time/timekeeping.c:760 [inline] [<00000000da5a94c0>] ktime_get+0x6f/0x1c0 kernel/time/timekeeping.c:750 [<0000000083d86513>] tick_nohz_irq_enter kernel/time/tick-sched.c:1144 [inline] [<0000000083d86513>] tick_irq_enter+0xcc/0x220 kernel/time/tick-sched.c:1165 [<00000000c1b94e1a>] irq_enter+0xb3/0xd0 kernel/softirq.c:349 [<00000000f3932a39>] smp_reschedule_interrupt+0xa/0x90 arch/x86/kernel/smp.c:267 [<000000003c1d36c8>] reschedule_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:671 d [<000000002e387628>] ? native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:56 [<00000000bb7ddcc6>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:428 [<00000000109ce416>] default_idle_call+0x36/0x60 kernel/sched/idle.c:97 [<000000007da24d42>] cpuidle_idle_call kernel/sched/idle.c:155 [inline] [<000000007da24d42>] cpu_idle_loop kernel/sched/idle.c:248 [inline] [<000000007da24d42>] cpu_startup_entry+0x283/0x3a0 kernel/sched/idle.c:303 [<000000003937083d>] start_secondary+0x31c/0x410 arch/x86/kernel/smpboot.c:251 Code: c81 c89 c8d c30 cff cff cff c44 c89 c85 c2c cff cff cff cc7 c00 cf1 cf1 cf1 cf1 cc7 c40 c04 cf1 cf1 c04 cf2 cc7 c40 c08 c00 cf3 cf3 cf3 c65 c48 c8b c04 c25 c28 c00 c00 c00 c<48> c89 c45 cd0 c31 cc0 c48 c89 cf8 c48 cc1 ce8 c03 c80 c3c c10 c00 c0f c85 c75 c03 c