R10: 0000000020875000 R11: 0000000000000216 R12: 00000000004b7454
R13: 0000000000000005 R14: 0000000080202000 R15: 0000000020f5ef1e
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 18121 Comm: syz-executor2 Not tainted 4.14.0-rc2+ #109
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d4536180 task.stack: ffff88019d998000
RIP: 0010:invalidate_xhlock kernel/locking/lockdep.c:4717 [inline]
RIP: 0010:lockdep_invariant_state+0xd6/0x120 kernel/locking/lockdep.c:4791
RSP: 0018:ffff88019d99fe38 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000001d88 RCX: 0000000000000000
RDX: 00000000000003bc RSI: 0000000000000000 RDI: 0000000000001de0
RBP: ffff88019d99fe48 R08: ffff8801db325c18 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88019d99fee0 R14: ffff8801d4536180 R15: ffffffff85ac9970
FS:  00007fae63ae6700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020b85000 CR3: 00000001cdcf7000 CR4: 00000000001426e0
Call Trace:
 lockdep_sys_exit+0x47/0xf0 kernel/locking/lockdep.c:4627
 prepare_exit_to_usermode arch/x86/entry/common.c:192 [inline]
 syscall_return_slowpath+0x244/0x510 arch/x86/entry/common.c:266
 ret_from_fork+0x15/0x40 arch/x86/entry/entry_64.S:423
RIP: 0033:0x4520a9
RSP: 002b:0000000020f5ef1e EFLAGS: 00000216 ORIG_RAX: 0000000000000038
RAX: 0000000000000000 RBX: 0000000000718000 RCX: 00000000004520a9
RDX: 000000002024c000 RSI: 0000000020f5ef1e RDI: 0000000080202000
RBP: 0000000000000450 R08: 000000002027b000 R09: 0000000000000000
R10: 0000000020875000 R11: 0000000000000216 R12: 00000000004b7454
R13: 0000000000000005 R14: 0000000080202000 R15: 0000000020f5ef1e
Code: 83 a0 11 00 00 83 e0 3f 48 89 c2 48 c1 e2 04 48 29 c2 48 b8 00 00 00 00 00 fc ff df 49 8d 1c d4 48 8d 7b 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 2f 48 c7 43 58 00 00 00 00 5b 41 5c 5d c3 0f ff 
RIP: invalidate_xhlock kernel/locking/lockdep.c:4717 [inline] RSP: ffff88019d99fe38
RIP: lockdep_invariant_state+0xd6/0x120 kernel/locking/lockdep.c:4791 RSP: ffff88019d99fe38
---[ end trace ebb90f111c335136 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..