sd 0:0:1:0: [sg0] tag#775 CDB: Test Unit Ready
sd 0:0:1:0: [sg0] tag#775 CDB[00]: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
sd 0:0:1:0: [sg0] tag#775 CDB[10]: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
sd 0:0:1:0: [sg0] tag#775 CDB[20]: 00 00 00
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3877 at kernel/sched/core.c:7939 __might_sleep+0x149/0x1a0 kernel/sched/core.c:7934
do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff81142525>] do_wait+0x335/0x950 kernel/exit.c:1587
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3877 Comm: syz-executor5 Not tainted 4.9.88-g71df7bb #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db207b18 ffffffff81d95f19 ffffffff83a482a0 ffff8801db207bf0
 ffffffff83a55800 ffffffff811ba599 0000000000000009 ffff8801db207be0
 ffffffff8142fa71 0000000041b58ab3 ffffffff8418bc48 ffffffff8142f8b5
Call Trace:
 <IRQ> 
 [<ffffffff81d95f19>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d95f19>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142fa71>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff811317b4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff81131894>] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565
 [<ffffffff811ba599>] __might_sleep+0x149/0x1a0 kernel/sched/core.c:7934
 [<ffffffff82ee7004>] lock_sock_nested+0x34/0x120 net/core/sock.c:2502
 [<ffffffff832ec572>] lock_sock include/net/sock.h:1404 [inline]
 [<ffffffff832ec572>] inet_shutdown+0x62/0x350 net/ipv4/af_inet.c:823
 [<ffffffff8358e2a0>] pppol2tp_session_close+0xa0/0xe0 net/l2tp/l2tp_ppp.c:441
 [<ffffffff83588c9f>] l2tp_tunnel_closeall+0x21f/0x3a0 net/l2tp/l2tp_core.c:1368
 [<ffffffff8358958e>] l2tp_tunnel_destruct+0x30e/0x5a0 net/l2tp/l2tp_core.c:1324
 [<ffffffff82ee8053>] __sk_destruct+0x53/0x570 net/core/sock.c:1428
 [<ffffffff812936d8>] __rcu_reclaim kernel/rcu/rcu.h:118 [inline]
 [<ffffffff812936d8>] rcu_do_batch kernel/rcu/tree.c:2789 [inline]
 [<ffffffff812936d8>] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline]
 [<ffffffff812936d8>] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline]
 [<ffffffff812936d8>] rcu_process_callbacks+0x898/0x1300 kernel/rcu/tree.c:3037
 [<ffffffff838be556>] __do_softirq+0x206/0x951 kernel/softirq.c:284
 [<ffffffff81147235>] invoke_softirq kernel/softirq.c:364 [inline]
 [<ffffffff81147235>] irq_exit+0x165/0x190 kernel/softirq.c:405
 [<ffffffff838bd16b>] exiting_irq arch/x86/include/asm/apic.h:659 [inline]
 [<ffffffff838bd16b>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:960
 [<ffffffff838b93f0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> 
 [<ffffffff81bef9d3>] selinux_task_wait+0x23/0x30 security/selinux/hooks.c:3966
 [<ffffffff81bd580d>] security_task_wait+0x6d/0xa0 security/security.c:1032
 [<ffffffff8113ed71>] wait_consider_task+0x221/0x36a0 kernel/exit.c:1377
 [<ffffffff81142613>] do_wait_thread kernel/exit.c:1490 [inline]
 [<ffffffff81142613>] do_wait+0x423/0x950 kernel/exit.c:1561
 [<ffffffff8114364e>] SYSC_wait4 kernel/exit.c:1689 [inline]
 [<ffffffff8114364e>] SyS_wait4+0x10e/0x1d0 kernel/exit.c:1658
 [<ffffffff81309bd8>] C_SYSC_wait4+0x248/0x290 kernel/compat.c:543
 [<ffffffff81309f8c>] compat_SyS_wait4+0x2c/0x40 kernel/compat.c:536
 [<ffffffff8111d145>] sys32_waitpid+0x25/0x30 arch/x86/ia32/sys_ia32.c:172
 [<ffffffff81006f95>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006f95>] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b9190>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..