unchecked MSR access error: WRMSR to 0x49 (tried to write 0x0000000000000001) at rIP: 0xffffffff812e77b0 (vmx_set_msr+0x2af0/0x3f90) Call Trace: ================================================================== BUG: KMSAN: uninit-value in get_stack_info+0x720/0x9d0 arch/x86/kernel/dumpstack_64.c:139 CPU: 0 PID: 10220 Comm: syz-executor3 Not tainted 4.19.0+ #80 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 __msan_warning+0x76/0xd0 mm/kmsan/kmsan_instr.c:415 get_stack_info+0x720/0x9d0 arch/x86/kernel/dumpstack_64.c:139 __unwind_start+0x7d/0xe0 arch/x86/kernel/unwind_frame.c:402 unwind_start arch/x86/include/asm/unwind.h:54 [inline] show_trace_log_lvl+0x2cc/0x11e0 arch/x86/kernel/dumpstack.c:173 show_stack_regs+0x6d/0x80 arch/x86/kernel/dumpstack.c:298 ex_handler_wrmsr_unsafe+0x2c3/0x340 arch/x86/mm/extable.c:142 fixup_exception+0x128/0x190 arch/x86/mm/extable.c:197 do_general_protection+0x2a2/0x6b0 arch/x86/kernel/traps.c:561 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1169 RIP: 0010:__wrmsr arch/x86/include/asm/msr.h:105 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:162 [inline] RIP: 0010:wrmsrl arch/x86/include/asm/msr.h:272 [inline] RIP: 0010:vmx_set_msr+0x2af0/0x3f90 arch/x86/kvm/vmx.c:4242 Code: e8 15 c2 76 00 48 83 7d b8 00 74 09 48 85 db 0f 84 4b 02 00 00 4d 85 f6 0f 84 53 02 00 00 b9 49 00 00 00 b8 01 00 00 00 31 d2 <0f> 30 4c 8d 75 c8 4c 89 f7 e8 f2 2b da 00 48 c7 00 00 00 00 00 48 RSP: 0018:ffff88011e44f990 EFLAGS: 00010246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000049 RDX: 0000000000000000 RSI: 000000000000004a RDI: 000000000000004b RBP: ffff88011e44fa60 R08: ffff880000000000 R09: 0000000000000002 R10: ffffffff8ae013f8 R11: ffffffff812e4cc0 R12: ffff88012b208000 R13: ffff88016c1fa788 R14: 0000000000000001 R15: 00000000c6400183 kvm_set_msr+0x4a1/0x590 arch/x86/kvm/x86.c:1241 do_set_msr arch/x86/kvm/x86.c:1270 [inline] __msr_io arch/x86/kvm/x86.c:2822 [inline] msr_io arch/x86/kvm/x86.c:2858 [inline] kvm_arch_vcpu_ioctl+0x4b68/0x73a0 arch/x86/kvm/x86.c:3825 kvm_vcpu_ioctl+0xca3/0x1f90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2742 do_vfs_ioctl+0xf77/0x2d30 fs/ioctl.c:46 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+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:00007f0df42e0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000020000280 RSI: 000000004008ae89 RDI: 0000000000000006 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0df42e16d4 R13: 00000000004bfedd R14: 00000000004d0208 R15: 00000000ffffffff Local variable description: ----state@show_trace_log_lvl Variable was created at: show_trace_log_lvl+0xb3/0x11e0 arch/x86/kernel/dumpstack.c:164 show_stack_regs+0x6d/0x80 arch/x86/kernel/dumpstack.c:298 ==================================================================