L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details.
ip_tunnel: non-ECT from 0.0.0.0 with TOS=0x1
ip_tunnel: non-ECT from 0.0.0.0 with TOS=0x1
==================================================================
BUG: KMSAN: uninit-value in vmcs_clear arch/x86/kvm/vmx.c:2119 [inline]
BUG: KMSAN: uninit-value in loaded_vmcs_init+0x343/0x590 arch/x86/kvm/vmx.c:2126
CPU: 1 PID: 6404 Comm: syz-executor2 Not tainted 4.19.0-rc4+ #63
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x306/0x460 lib/dump_stack.c:113
 kmsan_report+0x1a3/0x2d0 mm/kmsan/kmsan.c:917
 __msan_warning+0x7c/0xe0 mm/kmsan/kmsan_instr.c:500
 vmcs_clear arch/x86/kvm/vmx.c:2119 [inline]
 loaded_vmcs_init+0x343/0x590 arch/x86/kvm/vmx.c:2126
 __loaded_vmcs_clear+0x2fb/0x3c0 arch/x86/kvm/vmx.c:2209
 flush_smp_call_function_queue+0x404/0x770 kernel/smp.c:243
 generic_smp_call_function_single_interrupt+0x1f/0x30 kernel/smp.c:192
 smp_call_function_single_interrupt+0x2f7/0x530 arch/x86/kernel/smp.c:296
 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:891
 </IRQ>
RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:40 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:81 [inline]
RIP: 0010:kmsan_kmalloc+0xd4/0x120 mm/kmsan/kmsan_hooks.c:96
Code: 00 74 16 eb 53 48 89 df 4c 89 f6 e8 76 bc ff ff 41 ff 8d 7c 09 00 00 75 3f e8 68 c2 36 ff 48 8b 45 c0 48 89 45 b8 ff 75 b8 9d <65> 48 8b 04 25 28 00 00 00 48 3b 45 d0 75 2f 48 83 c4 20 5b 41 5c
RSP: 0018:ffff88015d46f888 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff04
RAX: 0000000000000246 RBX: ffff88013d65f040 RCX: 000000000000000f
RDX: 000000000000000e RSI: ffff88021fff2000 RDI: ffffffff7fffffff
RBP: ffff88015d46f8d0 R08: 00000000005000c0 R09: 0000000000000001
R10: 000000000013e9e8 R11: ffffffff843a23f0 R12: ffff88021f805800
R13: ffff8801655a5a00 R14: 0000000000000038 R15: 00000000007000c0
 __kmalloc+0x14b/0x440 mm/slub.c:3789
 kmalloc include/linux/slab.h:518 [inline]
 alloc_fdtable+0xbf/0x5e0 fs/file.c:111
 dup_fd+0x1186/0x1620 fs/file.c:310
 copy_files kernel/fork.c:1380 [inline]
 copy_process+0x3322/0xbc70 kernel/fork.c:1858
 _do_fork+0x3d4/0x1330 kernel/fork.c:2167
 __do_sys_clone kernel/fork.c:2274 [inline]
 __se_sys_clone+0xf6/0x110 kernel/fork.c:2268
 __x64_sys_clone+0x62/0x80 kernel/fork.c:2268
 do_syscall_64+0xbe/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x455b4a
Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00
RSP: 002b:0000000000a3fd50 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000a3fd50 RCX: 0000000000455b4a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000a3fd90 R08: 0000000000000001 R09: 00000000025d2940
R10: 00000000025d2c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002

Local variable description: ----error.i@loaded_vmcs_init
Variable was created at:
 loaded_vmcs_init+0x8a/0x590 arch/x86/kvm/vmx.c:2125
 __loaded_vmcs_clear+0x2fb/0x3c0 arch/x86/kvm/vmx.c:2209
==================================================================