loop0: detected capacity change from 0 to 1024
hfsplus: invalid length 256 has been corrected to 255
==================================================================
BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x5b9/0x1240 fs/hfsplus/unicode.c:210
Read of size 2 at addr ffff888027c0da18 by task syz.0.17/4430

CPU: 0 PID: 4430 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:420
 kasan_report+0x10b/0x140 mm/kasan/report.c:524
 hfsplus_uni2asc+0x5b9/0x1240 fs/hfsplus/unicode.c:210
 hfsplus_listxattr+0x58b/0xb80 fs/hfsplus/xattr.c:740
 vfs_listxattr fs/xattr.c:457 [inline]
 listxattr+0x283/0x2e0 fs/xattr.c:804
 path_listxattr+0xd9/0x1b0 fs/xattr.c:828
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6522d8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffb2544848 EFLAGS: 00000246 ORIG_RAX: 00000000000000c2
RAX: ffffffffffffffda RBX: 00007f6522fe5fa0 RCX: 00007f6522d8f749
RDX: 000000000000002f RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007f6522e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6522fe5fa0 R14: 00007f6522fe5fa0 R15: 0000000000000003
 </TASK>

Allocated by task 4430:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc+0xb0/0x240 mm/slab_common.c:949
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 hfsplus_find_init+0x85/0x1c0 fs/hfsplus/bfind.c:21
 hfsplus_listxattr+0x38c/0xb80 fs/hfsplus/xattr.c:700
 vfs_listxattr fs/xattr.c:457 [inline]
 listxattr+0x283/0x2e0 fs/xattr.c:804
 path_listxattr+0xd9/0x1b0 fs/xattr.c:828
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888027c0d800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 536 bytes inside of
 1024-byte region [ffff888027c0d800, ffff888027c0dc00)

The buggy address belongs to the physical page:
page:ffffea00009f0200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27c08
head:ffffea00009f0200 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0001eeb600 dead000000000002 ffff888017441dc0
raw: 0000000000000000 0000000000100010 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 4118, tgid 4118 (sshd-session), ts 48514922579, free_ts 48514390723
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328
 __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614
 alloc_slab_page+0x5d/0x160 mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x87/0x2c0 mm/slub.c:1997
 ___slab_alloc+0xbc6/0x1230 mm/slub.c:3154
 __slab_alloc mm/slub.c:3240 [inline]
 slab_alloc_node mm/slub.c:3325 [inline]
 __kmem_cache_alloc_node+0x1a0/0x260 mm/slub.c:3398
 __do_kmalloc_node mm/slab_common.c:935 [inline]
 __kmalloc_node_track_caller+0x9e/0x230 mm/slab_common.c:956
 kmalloc_reserve net/core/skbuff.c:446 [inline]
 __alloc_skb+0x22a/0x7e0 net/core/skbuff.c:515
 alloc_skb_fclone include/linux/skbuff.h:1321 [inline]
 tcp_stream_alloc_skb+0x3e/0x330 net/ipv4/tcp.c:869
 tcp_sendmsg_locked+0xd1c/0x3f10 net/ipv4/tcp.c:1332
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1490
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 sock_write_iter+0x2b5/0x3a0 net/socket.c:1143
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x44c/0x960 fs/read_write.c:584
 ksys_write+0x143/0x240 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare mm/page_alloc.c:1509 [inline]
 free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384
 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3479
 __skb_frag_unref include/linux/skbuff.h:3459 [inline]
 skb_release_data+0x499/0x7c0 net/core/skbuff.c:785
 skb_release_all net/core/skbuff.c:856 [inline]
 __kfree_skb net/core/skbuff.c:870 [inline]
 skb_attempt_defer_free+0x107/0x410 net/core/skbuff.c:6676
 tcp_eat_recv_skb net/ipv4/tcp.c:1661 [inline]
 tcp_recvmsg_locked+0x1190/0x22f0 net/ipv4/tcp.c:2674
 tcp_recvmsg+0x212/0x810 net/ipv4/tcp.c:2720
 inet_recvmsg+0x12c/0x1e0 net/ipv4/af_inet.c:890
 sock_recvmsg_nosec net/socket.c:1022 [inline]
 sock_recvmsg net/socket.c:1040 [inline]
 sock_read_iter+0x2bf/0x370 net/socket.c:1121
 call_read_iter include/linux/fs.h:2259 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x434/0x920 fs/read_write.c:470
 ksys_read+0x143/0x240 fs/read_write.c:613
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffff888027c0d900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888027c0d980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888027c0da00: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff888027c0da80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888027c0db00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================