BUG: unable to handle kernel paging request at 000000006df626fc
IP: lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021
PGD 5e28067 P4D 5e28067 PUD 5e2a067 PMD 0 
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 7053 Comm: syz-executor4 Not tainted 4.15.0-rc2-next-20171204+ #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 000000008a9085da task.stack: 00000000d0d996f5
RIP: 0010:lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021
RSP: 0018:ffff8801c9e1f530 EFLAGS: 00010046
RAX: 0000000000000007 RBX: 1ffff100393c3eab RCX: ffffffff810df77a
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801c5ad0ac4
RBP: ffff8801c9e1f6a0 R08: 0000000000000001 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff8748dd60 R12: ffff8801c5ad0240
R13: ffff8801c9e1f678 R14: ffff8801c0b948d8 R15: ffff8801c5ad0240
FS:  00007f5c7fae9700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff8 CR3: 00000001cdb8c000 CR4: 00000000001426f0
Call Trace:
 rcu_lock_release include/linux/rcupdate.h:249 [inline]
 srcu_read_unlock include/linux/srcu.h:174 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:6967 [inline]
 vcpu_run arch/x86/kvm/x86.c:7146 [inline]
 kvm_arch_vcpu_ioctl_run+0xd92/0x5c60 arch/x86/kvm/x86.c:7314
 kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2555
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007f5c7fae8c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758190 RCX: 00000000004529d9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000015
RBP: 000000000000023c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f0640
R13: 00000000ffffffff R14: 00007f5c7fae96d4 R15: 000000000000000a
Code: 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c4 08 00 00 41 c7 87 84 08 00 00 01 00 00 00 <cc> 3f 05 00 00 65 8b 05 4f d5 aa 7e 89 c0 48 0f a3 05 95 6b 08 
RIP: lock_release+0x195/0xda0 kernel/locking/lockdep.c:4021 RSP: ffff8801c9e1f530
CR2: fffffffffffffff8
---[ end trace e62b1633f77a396c ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..