loop2: detected capacity change from 0 to 64
hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6028 at fs/hfs/bnode.c:520 hfs_bnode_create+0x461/0x4f0 fs/hfs/bnode.c:520
Modules linked in:
CPU: 1 UID: 0 PID: 6028 Comm: syz.2.16 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:hfs_bnode_create+0x461/0x4f0 fs/hfs/bnode.c:520
Code: 21 8b 89 ee e8 40 c5 97 fe e9 cf fc ff ff e8 a6 e2 2e ff 4c 89 ef e8 8e b7 69 08 48 c7 c7 a0 5c 21 8b 89 ee e8 20 c5 97 fe 90 <0f> 0b 90 eb b0 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c d6 fb ff ff
RSP: 0018:ffffc900054b6860 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff88803d942000 RCX: c6f49221a0346a00
RDX: ffffc9000e271000 RSI: 0000000000002c6a RDI: 0000000000002c6b
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000a96cb1 R12: 0000000000000000
R13: ffff88803d9420d0 R14: ffff8880283cc400 R15: dffffc0000000000
FS:  00007f1693b2e6c0(0000) GS:ffff8881269bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 0000000034f0a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5bb/0x640 fs/hfs/btree.c:326
 hfs_btree_inc_height+0xf6/0xac0 fs/hfs/brec.c:471
 hfs_brec_insert+0x743/0xbd0 fs/hfs/brec.c:148
 __hfs_ext_write_extent+0x2a1/0x470 fs/hfs/extent.c:124
 __hfs_ext_cache_extent+0x6b/0x9b0 fs/hfs/extent.c:174
 hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
 hfs_extend_file+0x316/0x1230 fs/hfs/extent.c:401
 hfs_get_block+0x3d7/0xbd0 fs/hfs/extent.c:353
 get_more_blocks fs/direct-io.c:648 [inline]
 do_direct_IO fs/direct-io.c:936 [inline]
 __blockdev_direct_IO+0x157c/0x31f0 fs/direct-io.c:1243
 blockdev_direct_IO include/linux/fs.h:3507 [inline]
 hfs_direct_IO+0x11b/0x220 fs/hfs/inode.c:132
 generic_file_direct_write+0x1d9/0x3e0 mm/filemap.c:4109
 __generic_file_write_iter+0x120/0x240 mm/filemap.c:4278
 generic_file_write_iter+0x118/0x550 mm/filemap.c:4318
 iter_file_splice_write+0x97a/0x10f0 fs/splice.c:738
 do_splice_from fs/splice.c:938 [inline]
 direct_splice_actor+0x104/0x160 fs/splice.c:1161
 splice_direct_to_actor+0x5b3/0xcd0 fs/splice.c:1105
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x187/0x270 fs/splice.c:1230
 do_sendfile+0x4ec/0x7f0 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f16958ceba9
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:00007f1693b2e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f1695b15fa0 RCX: 00007f16958ceba9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007f1695951e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000fffa83 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1695b16038 R14: 00007f1695b15fa0 R15: 00007ffc10286498
 </TASK>