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BUG: KASAN: invalid-access in __kvm_pgtable_visit arch/arm64/kvm/hyp/pgtable.c:163 [inline]
BUG: KASAN: invalid-access in __kvm_pgtable_walk+0x8e4/0xa68 arch/arm64/kvm/hyp/pgtable.c:237
Read of size 8 at addr 78f0000018bf2000 by task syz.5.456/8910
Pointer tag: [78], memory tag: [fe]

CPU: 0 UID: 0 PID: 8910 Comm: syz.5.456 Not tainted syzkaller #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xac/0x288 mm/kasan/report.c:378
 print_report+0x84/0xa0 mm/kasan/report.c:482
 kasan_report+0xb0/0x110 mm/kasan/report.c:595
 kasan_tag_mismatch+0x28/0x3c mm/kasan/sw_tags.c:175
 __hwasan_tag_mismatch+0x30/0x60 arch/arm64/lib/kasan_sw_tags.S:55
 __kvm_pgtable_visit arch/arm64/kvm/hyp/pgtable.c:163 [inline]
 __kvm_pgtable_walk+0x8e4/0xa68 arch/arm64/kvm/hyp/pgtable.c:237
 _kvm_pgtable_walk arch/arm64/kvm/hyp/pgtable.c:260 [inline]
 kvm_pgtable_walk+0x294/0x468 arch/arm64/kvm/hyp/pgtable.c:283
 kvm_pgtable_stage2_destroy_range+0x60/0xb4 arch/arm64/kvm/hyp/pgtable.c:1563
 stage2_destroy_range arch/arm64/kvm/mmu.c:924 [inline]
 kvm_stage2_destroy arch/arm64/kvm/mmu.c:935 [inline]
 kvm_free_stage2_pgd+0x198/0x28c arch/arm64/kvm/mmu.c:1112
 kvm_uninit_stage2_mmu+0x20/0x38 arch/arm64/kvm/mmu.c:1023
 kvm_arch_flush_shadow_all+0x1a8/0x1e0 arch/arm64/kvm/nested.c:1113
 kvm_flush_shadow_all virt/kvm/kvm_main.c:343 [inline]
 kvm_mmu_notifier_release+0x48/0xa8 virt/kvm/kvm_main.c:884
 mmu_notifier_unregister+0x128/0x42c mm/mmu_notifier.c:815
 kvm_destroy_vm virt/kvm/kvm_main.c:1295 [inline]
 kvm_put_kvm+0x6a0/0xfa8 virt/kvm/kvm_main.c:1353
 kvm_vm_release+0x58/0x78 virt/kvm/kvm_main.c:1376
 __fput+0x4ac/0x980 fs/file_table.c:468
 ____fput+0x20/0x58 fs/file_table.c:496
 task_work_run+0x1bc/0x254 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x1bc/0x270 arch/arm64/kernel/entry-common.c:155
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline]
 el0_svc+0xb8/0x164 arch/arm64/kernel/entry-common.c:880
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x8df0000000000000 pfn:0x58bf2
flags: 0x1ffe1c000000000(node=0|zone=0|lastcpupid=0x7ff|kasantag=0x87)
raw: 01ffe1c000000000 ffffc1ffc06b9d88 ffffc1ffc0830f88 0000000000000000
raw: 8df0000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 fff0000018bf1e00: 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a
 fff0000018bf1f00: 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a 4a
>fff0000018bf2000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
                   ^
 fff0000018bf2100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 fff0000018bf2200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
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page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x8df0000000000000 pfn:0x58bf2