audit: type=1326 audit(1545615440.080:78): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=12016 comm="syz-executor3" exe="/root/syz-executor3" sig=31 arch=c000003e syscall=228 compat=0 ip=0x45a4ca code=0xffff0000
==================================================================
BUG: KMSAN: uninit-value in __vmcs_writel arch/x86/kvm/vmx.c:2401 [inline]
BUG: KMSAN: uninit-value in vmcs_write32 arch/x86/kvm/vmx.c:2422 [inline]
BUG: KMSAN: uninit-value in vmx_queue_exception+0x4e5/0x8c0 arch/x86/kvm/vmx.c:3363
CPU: 1 PID: 12055 Comm: syz-executor0 Not tainted 4.20.0-rc7+ #12
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:611
 __msan_warning+0x81/0xf0 mm/kmsan/kmsan_instr.c:295
 __vmcs_writel arch/x86/kvm/vmx.c:2401 [inline]
 vmcs_write32 arch/x86/kvm/vmx.c:2422 [inline]
 vmx_queue_exception+0x4e5/0x8c0 arch/x86/kvm/vmx.c:3363
 inject_pending_event arch/x86/kvm/x86.c:7147 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7643 [inline]
 vcpu_run arch/x86/kvm/x86.c:7874 [inline]
 kvm_arch_vcpu_ioctl_run+0x7fab/0x11400 arch/x86/kvm/x86.c:8074
 kvm_vcpu_ioctl+0xfe9/0x1d20 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2596
 do_vfs_ioctl+0xeeb/0x2c80 fs/ioctl.c:46
 ksys_ioctl fs/ioctl.c:713 [inline]
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:718
 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:718
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457669
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb5a000bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb5a000c6d4
R13: 00000000004c053c R14: 00000000004d15f0 R15: 00000000ffffffff

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:202 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:217 [inline]
 kmsan_internal_chain_origin+0x134/0x230 mm/kmsan/kmsan.c:437
 __msan_chain_origin+0x74/0xe0 mm/kmsan/kmsan_instr.c:182
 kvm_multiple_exception arch/x86/kvm/x86.c:483 [inline]
 kvm_queue_exception_e_p arch/x86/kvm/x86.c:554 [inline]
 kvm_inject_page_fault+0xa03/0xe80 arch/x86/kvm/x86.c:578
 nested_vmx_get_vmptr arch/x86/kvm/vmx.c:8273 [inline]
 handle_vmon+0xc5e/0x19f0 arch/x86/kvm/vmx.c:8396
 vmx_handle_exit+0x1582/0x9a00 arch/x86/kvm/vmx.c:10632
 vcpu_enter_guest arch/x86/kvm/x86.c:7811 [inline]
 vcpu_run arch/x86/kvm/x86.c:7874 [inline]
 kvm_arch_vcpu_ioctl_run+0xa5ad/0x11400 arch/x86/kvm/x86.c:8074
 kvm_vcpu_ioctl+0xfe9/0x1d20 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2596
 do_vfs_ioctl+0xeeb/0x2c80 fs/ioctl.c:46
 ksys_ioctl fs/ioctl.c:713 [inline]
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:718
 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:718
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7

Local variable description: ----e.i@handle_vmon
Variable was created at:
 handle_vmon+0x5d/0x19f0 arch/x86/kvm/vmx.c:8358
 vmx_handle_exit+0x1582/0x9a00 arch/x86/kvm/vmx.c:10632
==================================================================