================================================================== 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+0x4f2/0x8e0 arch/x86/kvm/vmx.c:3363 CPU: 1 PID: 23290 Comm: syz-executor5 Not tainted 4.20.0-rc7+ #3 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+0x1c9/0x220 lib/dump_stack.c:113 kmsan_report+0x12d/0x290 mm/kmsan/kmsan.c:682 __msan_warning+0x76/0xc0 mm/kmsan/kmsan_instr.c:316 __vmcs_writel arch/x86/kvm/vmx.c:2401 [inline] vmcs_write32 arch/x86/kvm/vmx.c:2422 [inline] vmx_queue_exception+0x4f2/0x8e0 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+0x780c/0x117f0 arch/x86/kvm/x86.c:8074 kvm_vcpu_ioctl+0x107b/0x1d80 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2596 do_vfs_ioctl+0xf36/0x2d30 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+0xcd/0x110 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:00007f5628ad0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5628ad16d4 R13: 00000000004c053c R14: 00000000004d15f0 R15: 00000000ffffffff Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:247 [inline] kmsan_save_stack mm/kmsan/kmsan.c:262 [inline] kmsan_internal_chain_origin+0x162/0x260 mm/kmsan/kmsan.c:470 __msan_chain_origin+0x6d/0xb0 mm/kmsan/kmsan_instr.c:197 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+0xa30/0xea0 arch/x86/kvm/x86.c:578 nested_vmx_get_vmptr arch/x86/kvm/vmx.c:8273 [inline] handle_vmon+0xc78/0x1a30 arch/x86/kvm/vmx.c:8396 vmx_handle_exit+0x1699/0x9be0 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+0xa787/0x117f0 arch/x86/kvm/x86.c:8074 kvm_vcpu_ioctl+0x107b/0x1d80 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2596 do_vfs_ioctl+0xf36/0x2d30 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+0xcd/0x110 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/0x1a30 arch/x86/kvm/vmx.c:8358 vmx_handle_exit+0x1699/0x9be0 arch/x86/kvm/vmx.c:10632 ==================================================================