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BUG: KASAN: stack-out-of-bounds in do_general_protection+0x2ac/0x2f0 arch/x86/kernel/traps.c:539
Read of size 8 at addr ffff88018f05f338 by task syz-executor3/12950

CPU: 1 PID: 12950 Comm: syz-executor3 Not tainted 4.18.0-rc7+ #170
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+0x1c9/0x2b4 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 do_general_protection+0x2ac/0x2f0 arch/x86/kernel/traps.c:539
 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1159
RIP: 0010:vmx_vcpu_run+0x124a/0x2600 arch/x86/kvm/vmx.c:10046
Code: a9 68 03 00 00 4c 8b b1 70 03 00 00 4c 8b b9 78 03 00 00 48 8b 89 08 03 00 00 75 05 0f 01 c2 eb 03 0f 01 c3 48 89 4c 24 08 59 <0f> 96 81 88 56 00 00 48 89 81 00 03 00 00 48 89 99 18 03 00 00 8f 
RSP: 0018:ffff88018f05f358 EFLAGS: 00010002
RAX: 0000000000000000 RBX: ffffea0006ffe2c0 RCX: f82e2c88b20a6500
RDX: 0000000000000000 RSI: ffffea0006ffe280 RDI: ffff8801bff8a000
RBP: ffff88018f05f518 R08: ffff8801ba3fc1c0 R09: ffffed0037ff1400
R10: fffff94000dffc56 R11: ffffea0006ffe2b7 R12: dffffc0000000000
R13: ffffea0006ffe280 R14: 0000160000000000 R15: ffff88021fffaa80
 __alloc_pages_nodemask+0x63e/0xdb0 mm/page_alloc.c:4369
 alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2093
 alloc_pages include/linux/gfp.h:492 [inline]
 __vmalloc_area_node mm/vmalloc.c:1686 [inline]
 __vmalloc_node_range+0x498/0x760 mm/vmalloc.c:1746
 __vmalloc_node mm/vmalloc.c:1791 [inline]
 __vmalloc_node_flags mm/vmalloc.c:1805 [inline]
 vzalloc+0x6f/0x80 mm/vmalloc.c:1844
 vmx_vm_alloc+0x13/0x20 arch/x86/kvm/vmx.c:10251
 kvm_arch_alloc_vm arch/x86/include/asm/kvm_host.h:1112 [inline]
 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:623 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3179 [inline]
 kvm_dev_ioctl+0x291/0x1b10 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3231
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456a09
Code: fd b4 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 b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f6b84760c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6b847616d4 RCX: 0000000000456a09
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000013
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cdb98 R14: 00000000004c4520 R15: 0000000000000000

The buggy address belongs to the page:
page:ffffea00063c17c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x2fffc0000000000()
raw: 02fffc0000000000 0000000000000000 ffffffff063c0101 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88018f05f200: 00 00 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 f2
 ffff88018f05f280: f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 f2
>ffff88018f05f300: f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 f2
                                        ^
 ffff88018f05f380: f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 f2
 ffff88018f05f400: f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 f2
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