loop4: detected capacity change from 0 to 1024
==================================================================
BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x624/0x1018 fs/hfsplus/unicode.c:179
Read of size 2 at addr ffff0000d6f0340c by task syz.4.157/7728

CPU: 1 UID: 0 PID: 7728 Comm: syz.4.157 Not tainted 6.11.0-rc5-syzkaller-gdf54f4a16f82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x198/0x538 mm/kasan/report.c:488
 kasan_report+0xd8/0x138 mm/kasan/report.c:601
 __asan_report_load2_noabort+0x20/0x2c mm/kasan/report_generic.c:379
 hfsplus_uni2asc+0x624/0x1018 fs/hfsplus/unicode.c:179
 hfsplus_readdir+0x7a0/0xf28 fs/hfsplus/dir.c:207
 iterate_dir+0x408/0x648 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:407 [inline]
 __se_sys_getdents64 fs/readdir.c:392 [inline]
 __arm64_sys_getdents64+0x1c4/0x48c fs/readdir.c:392
 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

Allocated by task 7728:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:4158 [inline]
 __kmalloc_noprof+0x2a4/0x498 mm/slub.c:4170
 kmalloc_noprof include/linux/slab.h:685 [inline]
 hfsplus_find_init+0x84/0x1bc fs/hfsplus/bfind.c:21
 hfsplus_readdir+0x1c8/0xf28 fs/hfsplus/dir.c:144
 iterate_dir+0x408/0x648 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:407 [inline]
 __se_sys_getdents64 fs/readdir.c:392 [inline]
 __arm64_sys_getdents64+0x1c4/0x48c fs/readdir.c:392
 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

The buggy address belongs to the object at ffff0000d6f03000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 0 bytes to the right of
 allocated 1036-byte region [ffff0000d6f03000, ffff0000d6f0340c)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x116f00
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: 0xfdffffff(slab)
raw: 05ffc00000000040 ffff0000c0002000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080080008 00000001fdffffff 0000000000000000
head: 05ffc00000000040 ffff0000c0002000 dead000000000122 0000000000000000
head: 0000000000000000 0000000080080008 00000001fdffffff 0000000000000000
head: 05ffc00000000003 fffffdffc35bc001 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d6f03300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000d6f03380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000d6f03400: 00 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff0000d6f03480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000d6f03500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================