loop0: detected capacity change from 0 to 1024
==================================================================
BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x576/0x11f0 fs/hfsplus/unicode.c:179
Read of size 2 at addr ffff88814773640c by task syz-executor393/3500

CPU: 0 PID: 3500 Comm: syz-executor393 Not tainted 5.15.145-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 hfsplus_uni2asc+0x576/0x11f0 fs/hfsplus/unicode.c:179
 hfsplus_readdir+0x90c/0x12f0 fs/hfsplus/dir.c:207
 iterate_dir+0x224/0x570
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f0f40c81649
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 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:00007ffcf5bc3718 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007ffcf5bc38e8 RCX: 00007f0f40c81649
RDX: 0000000000000067 RSI: 0000000020000540 RDI: 0000000000000003
RBP: 00007f0f40cf4610 R08: 0000000000000651 R09: 00007ffcf5bc38e8
R10: 00007ffcf5bc35d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffcf5bc38d8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Allocated by task 3500:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 __kmalloc+0x168/0x300 mm/slub.c:4407
 kmalloc include/linux/slab.h:596 [inline]
 hfsplus_find_init+0x81/0x1c0 fs/hfsplus/bfind.c:21
 hfsplus_readdir+0x204/0x12f0 fs/hfsplus/dir.c:144
 iterate_dir+0x224/0x570
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff888147736000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1036 bytes inside of
 2048-byte region [ffff888147736000, ffff888147736800)
The buggy address belongs to the page:
page:ffffea00051dcc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147730
head:ffffea00051dcc00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff)
raw: 057ff00000010200 dead000000000100 dead000000000122 ffff888011c42000
raw: 0000000000000000 0000000080080008 00000001ffffffff 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 1, ts 8731153668, free_ts 0
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421
 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2031
 alloc_slab_page mm/slub.c:1775 [inline]
 allocate_slab mm/slub.c:1912 [inline]
 new_slab+0xbb/0x4b0 mm/slub.c:1975
 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 __kmalloc_node_track_caller+0x1f6/0x390 mm/slub.c:4958
 kmalloc_reserve net/core/skbuff.c:356 [inline]
 __alloc_skb+0x12c/0x590 net/core/skbuff.c:427
 alloc_skb include/linux/skbuff.h:1167 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 rtmsg_ifinfo_build_skb+0x81/0x180 net/core/rtnetlink.c:3863
 rtmsg_ifinfo_event net/core/rtnetlink.c:3899 [inline]
 rtmsg_ifinfo+0x71/0x120 net/core/rtnetlink.c:3908
 register_netdevice+0x13d2/0x1720 net/core/dev.c:10396
 register_netdev+0x37/0x50 net/core/dev.c:10475
 eql_init_module+0x54/0x90 drivers/net/eql.c:597
 do_one_initcall+0x22b/0x7a0 init/main.c:1299
 do_initcall_level+0x157/0x207 init/main.c:1372
 do_initcalls+0x49/0x86 init/main.c:1388
 kernel_init_freeable+0x425/0x5b5 init/main.c:1612
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888147736300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888147736380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888147736400: 00 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff888147736480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888147736500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================