==================================================================
BUG: KMSAN: kernel-infoleak in __copy_to_user include/linux/uaccess.h:121 [inline]
BUG: KMSAN: kernel-infoleak in __kvm_write_guest_page arch/x86/kvm/../../../virt/kvm/kvm_main.c:1855 [inline]
BUG: KMSAN: kernel-infoleak in kvm_write_guest_page+0x373/0x500 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1867
CPU: 0 PID: 17241 Comm: syz-executor2 Not tainted 4.20.0-rc2+ #88
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+0x32d/0x480 lib/dump_stack.c:113
 kmsan_report+0x19f/0x300 mm/kmsan/kmsan.c:911
 kmsan_internal_check_memory+0x9dc/0xa60 mm/kmsan/kmsan.c:998
 kmsan_copy_to_user+0x7c/0xe0 mm/kmsan/kmsan_hooks.c:552
 __copy_to_user include/linux/uaccess.h:121 [inline]
 __kvm_write_guest_page arch/x86/kvm/../../../virt/kvm/kvm_main.c:1855 [inline]
 kvm_write_guest_page+0x373/0x500 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1867
 kvm_write_guest+0x1e1/0x360 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1889
 kvm_pv_clock_pairing arch/x86/kvm/x86.c:6923 [inline]
 kvm_emulate_hypercall+0x19c9/0x1ac0 arch/x86/kvm/x86.c:6996
not chained 450000 origins
 handle_vmcall+0x41/0x50 arch/x86/kvm/vmx.c:7510
 vmx_handle_exit+0x21bd/0xb980 arch/x86/kvm/vmx.c:10600
 vcpu_enter_guest arch/x86/kvm/x86.c:7809 [inline]
 vcpu_run arch/x86/kvm/x86.c:7872 [inline]
 kvm_arch_vcpu_ioctl_run+0xaeee/0x12040 arch/x86/kvm/x86.c:8072
 kvm_vcpu_ioctl+0xfb1/0x1f90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2596
 do_vfs_ioctl+0xfbc/0x2f70 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+0xcf/0x110 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457569
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:00007f09d4096c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000b
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f09d40976d4
R13: 00000000004c028e R14: 00000000004d06d8 R15: 00000000ffffffff

CPU: 1 PID: 17250 Comm: syz-executor0 Not tainted 4.20.0-rc2+ #88
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace: