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BUG: KASAN: use-after-free in crc_itu_t+0xc4/0x108 lib/crc-itu-t.c:60
Read of size 1 at addr ffff0000faae4000 by task syz.3.173/4975

CPU: 0 PID: 4975 Comm: syz.3.173 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0x100 mm/kasan/report.c:524
 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
 crc_itu_t+0xc4/0x108 lib/crc-itu-t.c:60
 udf_finalize_lvid fs/udf/super.c:2054 [inline]
 udf_sync_fs+0x154/0x2e8 fs/udf/super.c:2410
 sync_filesystem+0xe8/0x218 fs/sync.c:56
 udf_remount_fs+0xdc/0x478 fs/udf/super.c:623
 legacy_reconfigure+0xf8/0x110 fs/fs_context.c:655
 reconfigure_super+0x1d4/0x79c fs/super.c:977
 do_remount fs/namespace.c:2732 [inline]
 path_mount+0xbd4/0xe78 fs/namespace.c:3391
 do_mount fs/namespace.c:3412 [inline]
 __do_sys_mount fs/namespace.c:3620 [inline]
 __se_sys_mount fs/namespace.c:3597 [inline]
 __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3597
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the physical page:
page:00000000607d3ef3 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x13aae4
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc0003eab948 fffffc0003e774c8 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000faae3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000faae3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000faae4000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000faae4080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000faae4100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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UDF-fs: bad mount option "acl" or missing value