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Kernel panic - not syncing: scheduling while atomic

CPU: 1 PID: 17 Comm: ksoftirqd/1 Tainted: G        W       4.9.123-g7fa8c15 #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d9abf5e8 ffffffff81eb9689 ffffffff83c57d60 00000000ffffffff
 ffffffff83a08800 0000000000000001 ffff8801d9aa3000 ffff8801d9abf6a8
 ffffffff81423f75 0000000041b58ab3 ffffffff843bb880 ffffffff81423db6
Call Trace:
 [<ffffffff81eb9689>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb9689>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81423f75>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff81426a68>] __schedule_bug.cold.124+0x11e/0x14f kernel/sched/core.c:3316
 [<ffffffff839f18e7>] schedule_debug kernel/sched/core.c:3333 [inline]
 [<ffffffff839f18e7>] __schedule+0x1077/0x1bd0 kernel/sched/core.c:3434
 [<ffffffff839f24bf>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff839fe8d1>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
 [<ffffffff839f5683>] do_wait_for_common kernel/sched/completion.c:75 [inline]
 [<ffffffff839f5683>] __wait_for_common kernel/sched/completion.c:93 [inline]
 [<ffffffff839f5683>] wait_for_common kernel/sched/completion.c:101 [inline]
 [<ffffffff839f5683>] wait_for_completion+0x203/0x2e0 kernel/sched/completion.c:122
 [<ffffffff8127e117>] __wait_rcu_gp+0x137/0x1b0 kernel/rcu/update.c:369
 [<ffffffff812863aa>] synchronize_rcu.part.62+0xfa/0x110 kernel/rcu/tree_plugin.h:684
 [<ffffffff812863e7>] synchronize_rcu+0x27/0x90 kernel/rcu/tree_plugin.h:685
 [<ffffffff836c4f2a>] __l2tp_session_unhash+0x38a/0x520 net/l2tp/l2tp_core.c:1796
 [<ffffffff836c52b7>] l2tp_tunnel_closeall+0x1f7/0x350 net/l2tp/l2tp_core.c:1364
 [<ffffffff836c5b72>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff830281f5>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff81289aae>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff81289aae>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff81289aae>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff81289aae>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff81289aae>] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037
 [<ffffffff83a08980>] __do_softirq+0x210/0x940 kernel/softirq.c:288
 [<ffffffff8114d320>] run_ksoftirqd+0x30/0x60 kernel/softirq.c:680
 [<ffffffff811aa5a9>] smpboot_thread_fn+0x5c9/0x900 kernel/smpboot.c:163
 [<ffffffff8119f3cd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff83a01f5c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..