==================================================================
BUG: KASAN: invalid-access in copy_page+0x10/0xd0 arch/arm64/lib/copy_page.S:26
Read at addr f9ff000021819000 by task syz-executor.0/2222
Pointer tag: [f9], memory tag: [fc]

CPU: 0 PID: 2222 Comm: syz-executor.0 Not tainted 6.0.0-rc6-syzkaller-00286-ga63f2e7cb110 #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace.part.0+0xd0/0xe0 arch/arm64/kernel/stacktrace.c:182
 dump_backtrace arch/arm64/kernel/stacktrace.c:188 [inline]
 show_stack+0x18/0x50 arch/arm64/kernel/stacktrace.c:189
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x68/0x84 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:317 [inline]
 print_report+0x104/0x604 mm/kasan/report.c:433
 kasan_report+0x8c/0xb0 mm/kasan/report.c:495
 __do_kernel_fault+0x11c/0x1bc arch/arm64/mm/fault.c:319
 do_bad_area arch/arm64/mm/fault.c:469 [inline]
 do_tag_check_fault+0x78/0x90 arch/arm64/mm/fault.c:742
 do_mem_abort+0x44/0x9c arch/arm64/mm/fault.c:818
 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:366
 el1h_64_sync_handler+0xb0/0xd0 arch/arm64/kernel/entry-common.c:417
 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:576
 copy_page+0x10/0xd0 arch/arm64/lib/copy_page.S:26
 copy_user_highpage+0x18/0x50 arch/arm64/mm/copypage.c:34
 __wp_page_copy_user mm/memory.c:2856 [inline]
 wp_page_copy+0xa0/0x6f0 mm/memory.c:3117
 do_wp_page+0x140/0x660 mm/memory.c:3479
 handle_pte_fault mm/memory.c:4929 [inline]
 __handle_mm_fault+0x664/0xe7c mm/memory.c:5053
 handle_mm_fault+0xec/0x280 mm/memory.c:5151
 __do_page_fault arch/arm64/mm/fault.c:502 [inline]
 do_page_fault+0x120/0x3d0 arch/arm64/mm/fault.c:602
 do_mem_abort+0x44/0x9c arch/arm64/mm/fault.c:818
 el0_da+0x30/0xbc arch/arm64/kernel/entry-common.c:502
 el0t_64_sync_handler+0x68/0xc0 arch/arm64/kernel/entry-common.c:645
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:581

The buggy address belongs to the physical page:
page:00000000ba7e00ec refcount:2 mapcount:1 mapping:0000000000000000 index:0xaaaac8d08 pfn:0x61819
memcg:f4ff0000261a8000
anon flags: 0x1ffc1800208001c(uptodate|dirty|lru|swapbacked|arch_2|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x6)
raw: 01ffc1800208001c fffffc0000951648 fffffc00005fdc48 fdff000005a3ce01
raw: 0000000aaaac8d08 0000000000000000 0000000200000000 f4ff0000261a8000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff000021818e00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffff000021818f00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
>ffff000021819000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff000021819100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff000021819200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================