TITLE: KMSAN: uninit-value in em_ret_near_imm
=====================================================
BUG: KMSAN: uninit-value in assign_eip_near arch/x86/kvm/emulate.c:829 [inline]
BUG: KMSAN: uninit-value in em_ret_near_imm+0x15f/0x5d0 arch/x86/kvm/emulate.c:3192
 assign_eip_near arch/x86/kvm/emulate.c:829 [inline]
 em_ret_near_imm+0x15f/0x5d0 arch/x86/kvm/emulate.c:3192
 x86_emulate_insn+0x1f63/0x6580 arch/x86/kvm/emulate.c:5292
 x86_emulate_instruction+0x201a/0x3530 arch/x86/kvm/x86.c:9175
 kvm_emulate_instruction arch/x86/kvm/x86.c:9255 [inline]
 complete_emulated_io arch/x86/kvm/x86.c:11212 [inline]
 complete_emulated_mmio+0x79e/0x940 arch/x86/kvm/x86.c:11272
 kvm_arch_vcpu_ioctl_run+0x1b0c/0xcfc0 arch/x86/kvm/x86.c:11384
 kvm_vcpu_ioctl+0xd19/0x19c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4441
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0x28e/0x480 fs/ioctl.c:857
 __x64_sys_ioctl+0xa1/0xe0 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
Local variable eip created at:
 em_ret_near_imm+0x45/0x5d0 arch/x86/kvm/emulate.c:3189
 x86_emulate_insn+0x1f63/0x6580 arch/x86/kvm/emulate.c:5292
CPU: 3 PID: 8089 Comm: 910 Not tainted 6.8.0-rc4-00267-g0f1dd5e91e2b-dirty #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
=====================================================
 assign_eip_near arch/x86/kvm/emulate.c:829 [inline]
 em_ret_near_imm+0x15f/0x5d0 arch/x86/kvm/emulate.c:3192
 x86_emulate_insn+0x1f63/0x6580 arch/x86/kvm/emulate.c:5292
 x86_emulate_instruction+0x201a/0x3530 arch/x86/kvm/x86.c:9175
 kvm_emulate_instruction arch/x86/kvm/x86.c:9255 [inline]
 complete_emulated_io arch/x86/kvm/x86.c:11212 [inline]
 complete_emulated_mmio+0x79e/0x940 arch/x86/kvm/x86.c:11272
 kvm_arch_vcpu_ioctl_run+0x1b0c/0xcfc0 arch/x86/kvm/x86.c:11384
 kvm_vcpu_ioctl+0xd19/0x19c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4441
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0x28e/0x480 fs/ioctl.c:857
 __x64_sys_ioctl+0xa1/0xe0 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
Local variable eip created at:
 em_ret_near_imm+0x45/0x5d0 arch/x86/kvm/emulate.c:3189
 x86_emulate_insn+0x1f63/0x6580 arch/x86/kvm/emulate.c:5292
CPU: 3 PID: 8089 Comm: 910 Not tainted 6.8.0-rc4-00267-g0f1dd5e91e2b-dirty #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
=====================================================
Disabling lock debugging due to kernel taint
Kernel panic - not syncing: kmsan.panic set ...
CPU: 3 PID: 8089 Comm: 910 Tainted: G    B              6.8.0-rc4-00267-g0f1dd5e91e2b-dirty #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1f7/0x290 lib/dump_stack.c:106
 dump_stack+0x29/0x30 lib/dump_stack.c:113
 panic+0x506/0xd70 kernel/panic.c:344
 kmsan_report+0x2d0/0x2d0 mm/kmsan/report.c:216
 __msan_warning+0x96/0x120 mm/kmsan/instrumentation.c:317
 assign_eip_near arch/x86/kvm/emulate.c:829 [inline]
 em_ret_near_imm+0x15f/0x5d0 arch/x86/kvm/emulate.c:3192
 x86_emulate_insn+0x1f63/0x6580 arch/x86/kvm/emulate.c:5292
 x86_emulate_instruction+0x201a/0x3530 arch/x86/kvm/x86.c:9175
 kvm_emulate_instruction arch/x86/kvm/x86.c:9255 [inline]
 complete_emulated_io arch/x86/kvm/x86.c:11212 [inline]
 complete_emulated_mmio+0x79e/0x940 arch/x86/kvm/x86.c:11272
 kvm_arch_vcpu_ioctl_run+0x1b0c/0xcfc0 arch/x86/kvm/x86.c:11384
 kvm_vcpu_ioctl+0xd19/0x19c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4441
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0x28e/0x480 fs/ioctl.c:857
 __x64_sys_ioctl+0xa1/0xe0 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x4360b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8
RSP: 002b:00007ffc86f01268 EFLAGS: 00000217 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffc86f01498 RCX: 00000000004360b9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007ffc86f01280 R08: 00007ffc86f01280 R09: 00007ffc86f01280
R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000001
R13: 00007ffc86f01488 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..