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BUG: KASAN: slab-out-of-bounds in search_memslots include/linux/kvm_host.h:1051 [inline]
BUG: KASAN: slab-out-of-bounds in __gfn_to_memslot include/linux/kvm_host.h:1063 [inline]
BUG: KASAN: slab-out-of-bounds in gfn_to_memslot arch/x86/kvm/../../../virt/kvm/kvm_main.c:1597 [inline]
BUG: KASAN: slab-out-of-bounds in gfn_to_hva+0x4a0/0x4c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1677
Read of size 8 at addr ffff8880a8c49468 by task syz-executor012/7090

CPU: 0 PID: 7090 Comm: syz-executor012 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0
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+0x188/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x315 mm/kasan/report.c:382
 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511
 kasan_report+0x33/0x50 mm/kasan/common.c:625
 search_memslots include/linux/kvm_host.h:1051 [inline]
 __gfn_to_memslot include/linux/kvm_host.h:1063 [inline]
 gfn_to_memslot arch/x86/kvm/../../../virt/kvm/kvm_main.c:1597 [inline]
 gfn_to_hva+0x4a0/0x4c0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1677
 kvm_arch_mmu_notifier_invalidate_range+0x21/0x80 arch/x86/kvm/x86.c:8142
 kvm_mmu_notifier_invalidate_range_start+0x1a1/0x280 arch/x86/kvm/../../../virt/kvm/kvm_main.c:421
 mn_hlist_invalidate_range_start mm/mmu_notifier.c:493 [inline]
 __mmu_notifier_invalidate_range_start+0x4bc/0x6b0 mm/mmu_notifier.c:525
 mmu_notifier_invalidate_range_start include/linux/mmu_notifier.h:446 [inline]
 change_pmd_range mm/mprotect.c:247 [inline]
 change_pud_range mm/mprotect.c:297 [inline]
 change_p4d_range mm/mprotect.c:317 [inline]
 change_protection_range mm/mprotect.c:342 [inline]
 change_protection+0x1ed0/0x2710 mm/mprotect.c:365
 mprotect_fixup+0x46c/0x940 mm/mprotect.c:487
 do_mprotect_pkey+0x542/0x950 mm/mprotect.c:613
 __do_sys_mprotect mm/mprotect.c:638 [inline]
 __se_sys_mprotect mm/mprotect.c:635 [inline]
 __x64_sys_mprotect+0x74/0xb0 mm/mprotect.c:635
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x446927
Code: 00 00 00 b8 0b 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffef1644d38 EFLAGS: 00000246 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 0000000000446927
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007f3782e88000
RBP: 00007ffef1644e20 R08: 00000000006dba00 R09: 00000000006dba00
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffef1644e40
R13: 00007f3782ea8700 R14: 00007f3782ea89c0 R15: 000000000000002d

Allocated by task 7094:
 save_stack+0x1b/0x40 mm/kasan/common.c:49
 set_track mm/kasan/common.c:57 [inline]
 __kasan_kmalloc mm/kasan/common.c:495 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468
 kmalloc_node include/linux/slab.h:578 [inline]
 kvmalloc_node+0x61/0xf0 mm/util.c:574
 kvmalloc include/linux/mm.h:757 [inline]
 kvzalloc include/linux/mm.h:765 [inline]
 kvm_dup_memslots arch/x86/kvm/../../../virt/kvm/kvm_main.c:1101 [inline]
 kvm_set_memslot+0x115/0x1530 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1118
 __kvm_set_memory_region+0xcf7/0x1320 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1300
 kvm_set_memory_region+0x29/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1321
 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1333 [inline]
 kvm_vm_ioctl+0x678/0x2400 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3604
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:763
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8880a8c49000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1128 bytes inside of
 2048-byte region [ffff8880a8c49000, ffff8880a8c49800)
The buggy address belongs to the page:
page:ffffea0002a31240 refcount:1 mapcount:0 mapping:0000000056c727a7 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002573948 ffffea0002516c48 ffff8880aa000e00
raw: 0000000000000000 ffff8880a8c49000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a8c49300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880a8c49380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880a8c49400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
                                                          ^
 ffff8880a8c49480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880a8c49500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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