==================================================================
BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x648/0x1054 fs/hfsplus/unicode.c:179
Read of size 2 at addr ffff0000c66b7218 by task syz.0.258/7934

CPU: 0 UID: 0 PID: 7934 Comm: syz.0.258 Not tainted 6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x254 mm/kasan/report.c:408
 print_report+0x68/0x84 mm/kasan/report.c:521
 kasan_report+0xb0/0x110 mm/kasan/report.c:634
 __asan_report_load2_noabort+0x20/0x2c mm/kasan/report_generic.c:379
 hfsplus_uni2asc+0x648/0x1054 fs/hfsplus/unicode.c:179
 hfsplus_listxattr+0x4a8/0x9e8 fs/hfsplus/xattr.c:734
 vfs_listxattr fs/xattr.c:493 [inline]
 listxattr+0x108/0x37c fs/xattr.c:924
 filename_listxattr fs/xattr.c:958 [inline]
 path_listxattrat+0x15c/0x33c fs/xattr.c:988
 __do_sys_listxattr fs/xattr.c:1001 [inline]
 __se_sys_listxattr fs/xattr.c:998 [inline]
 __arm64_sys_listxattr+0x84/0x98 fs/xattr.c:998
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

Allocated by task 7934:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4328 [inline]
 __kmalloc_noprof+0x2fc/0x4c8 mm/slub.c:4340
 kmalloc_noprof include/linux/slab.h:909 [inline]
 hfsplus_find_init+0x84/0x1bc fs/hfsplus/bfind.c:21
 hfsplus_listxattr+0x2fc/0x9e8 fs/hfsplus/xattr.c:693
 vfs_listxattr fs/xattr.c:493 [inline]
 listxattr+0x108/0x37c fs/xattr.c:924
 filename_listxattr fs/xattr.c:958 [inline]
 path_listxattrat+0x15c/0x33c fs/xattr.c:988
 __do_sys_listxattr fs/xattr.c:1001 [inline]
 __se_sys_listxattr fs/xattr.c:998 [inline]
 __arm64_sys_listxattr+0x84/0x98 fs/xattr.c:998
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

The buggy address belongs to the object at ffff0000c66b7000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 0 bytes to the right of
 allocated 536-byte region [ffff0000c66b7000, ffff0000c66b7218)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1066b0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c0001dc0 fffffdffc3d00a00 dead000000000002
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 05ffc00000000040 ffff0000c0001dc0 fffffdffc3d00a00 dead000000000002
head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 05ffc00000000003 fffffdffc319ac01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000c66b7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000c66b7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000c66b7200: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff0000c66b7280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000c66b7300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
hfsplus: unicode conversion failed