================================================================== BUG: KMSAN: uninit-value in __vmcs_writel arch/x86/kvm/vmx.c:2379 [inline] BUG: KMSAN: uninit-value in vmcs_write32 arch/x86/kvm/vmx.c:2400 [inline] BUG: KMSAN: uninit-value in vmx_queue_exception+0x58d/0x860 arch/x86/kvm/vmx.c:3331 CPU: 0 PID: 12653 Comm: syz-executor5 Not tainted 4.19.0-rc7+ #69 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+0x306/0x460 lib/dump_stack.c:113 kmsan_report+0x1a2/0x2e0 mm/kmsan/kmsan.c:917 __msan_warning+0x7c/0xe0 mm/kmsan/kmsan_instr.c:500 __vmcs_writel arch/x86/kvm/vmx.c:2379 [inline] vmcs_write32 arch/x86/kvm/vmx.c:2400 [inline] vmx_queue_exception+0x58d/0x860 arch/x86/kvm/vmx.c:3331 inject_pending_event arch/x86/kvm/x86.c:7004 [inline] vcpu_enter_guest arch/x86/kvm/x86.c:7499 [inline] vcpu_run arch/x86/kvm/x86.c:7730 [inline] kvm_arch_vcpu_ioctl_run+0x7664/0x10ab0 arch/x86/kvm/x86.c:7930 kvm_vcpu_ioctl+0x11a7/0x20b0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2590 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0xf28/0x2ca0 fs/ioctl.c:687 ksys_ioctl fs/ioctl.c:702 [inline] __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:707 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:707 do_syscall_64+0xbe/0x100 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:00007f3e903aac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3e903ab6d4 R13: 00000000004c0027 R14: 00000000004d0108 R15: 00000000ffffffff Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:255 [inline] kmsan_save_stack mm/kmsan/kmsan.c:270 [inline] kmsan_internal_chain_origin+0x136/0x240 mm/kmsan/kmsan.c:572 __msan_chain_origin+0x75/0xd0 mm/kmsan/kmsan_instr.c:337 kvm_multiple_exception arch/x86/kvm/x86.c:433 [inline] kvm_queue_exception_e arch/x86/kvm/x86.c:520 [inline] kvm_inject_page_fault+0x688/0x6f0 arch/x86/kvm/x86.c:497 nested_vmx_get_vmptr+0x374/0x3d0 arch/x86/kvm/vmx.c:8237 handle_vmclear+0x4ee/0x1a60 arch/x86/kvm/vmx.c:8510 vmx_handle_exit+0x20f5/0xb900 arch/x86/kvm/vmx.c:10129 vcpu_enter_guest arch/x86/kvm/x86.c:7667 [inline] vcpu_run arch/x86/kvm/x86.c:7730 [inline] kvm_arch_vcpu_ioctl_run+0xa22b/0x10ab0 arch/x86/kvm/x86.c:7930 kvm_vcpu_ioctl+0x11a7/0x20b0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2590 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0xf28/0x2ca0 fs/ioctl.c:687 ksys_ioctl fs/ioctl.c:702 [inline] __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:707 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:707 do_syscall_64+0xbe/0x100 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Local variable description: ----e@nested_vmx_get_vmptr Variable was created at: nested_vmx_get_vmptr+0xa5/0x3d0 arch/x86/kvm/vmx.c:8228 handle_vmclear+0x4ee/0x1a60 arch/x86/kvm/vmx.c:8510 ==================================================================