=============================
WARNING: suspicious RCU usage
4.13.0-rc7+ #57 Not tainted
-----------------------------
./include/linux/kvm_host.h:481 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
no locks held by syzkaller260035/12076.

stack backtrace:
CPU: 0 PID: 12076 Comm: syzkaller260035 Not tainted 4.13.0-rc7+ #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
stack backtrace:
CPU: 0 PID: 12076 Comm: syzkaller260035 Not tainted 4.13.0-rc7+ #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4532
 __kvm_memslots include/linux/kvm_host.h:573 [inline]
 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:722 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3194 [inline]
 kvm_dev_ioctl+0xd21/0x1840 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3245
 vfs_ioctl fs/ioctl.c:45 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:685
GDTR:                           limit=0x0000ffff, base=0x0000000000000000
GDTR:                           limit=0x0000ffff, base=0x0000000000000000
GDTR:                           limit=0x0000ffff, base=0x0000000000000000
LDTR: sel=0x0000, attr=0x00082, limit=0x0000ffff, base=0x0000000000000000
IDTR:                           limit=0x0000ffff, base=0x0000000000000000
TR:   sel=0x0000, attr=0x0008b, limit=0x00002088, base=0x0000000000000000
EFER =     0x0000000000000000  PAT = 0x0007040600070406
DebugCtl = 0x0000000000000000  DebugExceptions = 0x0000000000000000
Interruptibility = 00000000  ActivityState = 00000000
*** Host State ***