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BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x57f/0x1200 fs/hfsplus/unicode.c:179
Read of size 2 at addr ffff888011ee740c by task syz-executor382/5085

CPU: 0 PID: 5085 Comm: syz-executor382 Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 hfsplus_uni2asc+0x57f/0x1200 fs/hfsplus/unicode.c:179
 hfsplus_readdir+0x93b/0x1320 fs/hfsplus/dir.c:207
 iterate_dir+0x57a/0x810 fs/readdir.c:110
 __do_sys_getdents fs/readdir.c:326 [inline]
 __se_sys_getdents+0x1ef/0x4d0 fs/readdir.c:311
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f30dc463a99
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe50b2a8f8 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f30dc463a99
RDX: 00000000000000b8 RSI: 0000000020001fc0 RDI: 0000000000000004
RBP: 00007f30dc4d75f0 R08: 00005555871e64c0 R09: 00005555871e64c0
R10: 00000000000006bc R11: 0000000000000246 R12: 00007ffe50b2a920
R13: 00007ffe50b2ab48 R14: 431bde82d7b634db R15: 00007f30dc4ac03b
 </TASK>

Allocated by task 5085:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:4123 [inline]
 __kmalloc_noprof+0x1f9/0x400 mm/slub.c:4136
 kmalloc_noprof include/linux/slab.h:664 [inline]
 hfsplus_find_init+0x85/0x1c0 fs/hfsplus/bfind.c:21
 hfsplus_readdir+0x20e/0x1320 fs/hfsplus/dir.c:144
 iterate_dir+0x57a/0x810 fs/readdir.c:110
 __do_sys_getdents fs/readdir.c:326 [inline]
 __se_sys_getdents+0x1ef/0x4d0 fs/readdir.c:311
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888011ee7000
 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 [ffff888011ee7000, ffff888011ee740c)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ee0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff888015042000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000080008 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff888015042000 dead000000000122 0000000000000000
head: 0000000000000000 0000000000080008 00000001ffffefff 0000000000000000
head: 00fff00000000003 ffffea000047b801 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4750, tgid 4750 (dhcpcd), ts 64079093681, free_ts 64078396443
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473
 prep_new_page mm/page_alloc.c:1481 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2265
 allocate_slab+0x5a/0x2f0 mm/slub.c:2428
 new_slab mm/slub.c:2481 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667
 __slab_alloc+0x58/0xa0 mm/slub.c:3757
 __slab_alloc_node mm/slub.c:3810 [inline]
 slab_alloc_node mm/slub.c:3990 [inline]
 __do_kmalloc_node mm/slub.c:4122 [inline]
 __kmalloc_noprof+0x257/0x400 mm/slub.c:4136
 kmalloc_noprof include/linux/slab.h:664 [inline]
 sk_prot_alloc+0xe0/0x210 net/core/sock.c:2080
 sk_alloc+0x38/0x370 net/core/sock.c:2133
 __netlink_create+0x6c/0x280 net/netlink/af_netlink.c:647
 netlink_create+0x3d5/0x590 net/netlink/af_netlink.c:708
 __sock_create+0x490/0x920 net/socket.c:1571
 sock_create net/socket.c:1622 [inline]
 __sys_socket_create net/socket.c:1659 [inline]
 __sys_socket+0x150/0x3c0 net/socket.c:1706
 __do_sys_socket net/socket.c:1720 [inline]
 __se_sys_socket net/socket.c:1718 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1718
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
page last free pid 4749 tgid 4749 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1093 [inline]
 free_unref_page+0xd19/0xea0 mm/page_alloc.c:2588
 __folio_put+0x3b9/0x620 mm/swap.c:129
 folio_put include/linux/mm.h:1513 [inline]
 free_large_kmalloc+0x105/0x1c0 mm/slub.c:4530
 kfree+0x1c4/0x360 mm/slub.c:4553
 skb_kfree_head net/core/skbuff.c:1069 [inline]
 skb_free_head net/core/skbuff.c:1081 [inline]
 skb_release_data+0x676/0x880 net/core/skbuff.c:1108
 skb_release_all net/core/skbuff.c:1173 [inline]
 __kfree_skb net/core/skbuff.c:1187 [inline]
 consume_skb+0xb1/0x160 net/core/skbuff.c:1409
 netlink_recvmsg+0x60a/0x11d0 net/netlink/af_netlink.c:1983
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg+0x22f/0x280 net/socket.c:1068
 ____sys_recvmsg+0x1db/0x470 net/socket.c:2804
 ___sys_recvmsg net/socket.c:2846 [inline]
 __sys_recvmsg+0x2f0/0x3e0 net/socket.c:2876
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888011ee7300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888011ee7380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888011ee7400: 00 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff888011ee7480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888011ee7500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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