WARNING: CPU: 1 PID: 12318 at kernel/locking/lockdep.c:700 arch_local_save_flags kernel/locking/lockdep.c:720 [inline] WARNING: CPU: 1 PID: 12318 at kernel/locking/lockdep.c:700 look_up_lock_class kernel/locking/lockdep.c:691 [inline] WARNING: CPU: 1 PID: 12318 at kernel/locking/lockdep.c:700 register_lock_class+0x1591/0x2820 kernel/locking/lockdep.c:750 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 12318 Comm: syz-executor2 Not tainted 4.16.0-rc2+ #245 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x211/0x2d0 lib/bug.c:184 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x58/0x80 arch/x86/entry/entry_64.S:957 RIP: 0010:arch_local_save_flags kernel/locking/lockdep.c:720 [inline] RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:691 [inline] RIP: 0010:register_lock_class+0x1591/0x2820 kernel/locking/lockdep.c:750 RSP: 0018:ffff8801b5e86db8 EFLAGS: 00010087 RAX: 0000000000000004 RBX: 1ffff10036bd0dc9 RCX: 1ffffffff10ba860 RDX: ffffffff8683b840 RSI: 1ffffffff1028bb0 RDI: ffff8801c5659338 RBP: ffff8801b5e871d0 R08: 0000000000000003 R09: ffff8801c5659320 R10: 0000000000000000 R11: ffff8801c5659320 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff88145d60 R15: ffffffff8691bae0 __lock_acquire+0x1de/0x3e00 kernel/locking/lockdep.c:3319 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:315 [inline] lock_sock_nested+0x44/0x110 net/core/sock.c:2773 lock_sock include/net/sock.h:1464 [inline] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1331 ip_getsockopt+0x90/0x200 net/ipv4/ip_sockglue.c:1562 udp_getsockopt+0x45/0x80 net/ipv4/udp.c:2478 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2938 SYSC_getsockopt net/socket.c:1881 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1863 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453d69 RSP: 002b:00007f3b3e8c0c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007f3b3e8c16d4 RCX: 0000000000453d69 RDX: 000000000000002d RSI: 0000000000000000 RDI: 0000000000000017 RBP: 000000000072bf58 R08: 0000000020000040 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f8 R14: 00000000006f17e0 R15: 0000000000000001 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..