R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f95631b5fa0 R15: 00007fff07d6c3a8
 </TASK>
hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: fs/hfs/bnode.c:428 at hfs_bnode_create+0x461/0x4f0 fs/hfs/bnode.c:428, CPU#0: syz.6.4762/26471
Modules linked in:
CPU: 0 UID: 0 PID: 26471 Comm: syz.6.4762 Not tainted 6.16.0-rc6-next-20250714-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:hfs_bnode_create+0x461/0x4f0 fs/hfs/bnode.c:428
Code: a1 8b 89 ee e8 70 04 8d fe e9 cf fc ff ff e8 e6 2b 25 ff 4c 89 ef e8 1e 2b df 08 48 c7 c7 20 e4 a1 8b 89 ee e8 50 04 8d 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:ffffc9000aeb6d20 EFLAGS: 00010246

RAX: 000000000000001f RBX: ffff888042b4c000 RCX: ad2d41ae70ac4600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8fa29637 R09: 1ffffffff1f452c6
R10: dffffc0000000000 R11: fffffbfff1f452c7 R12: 0000000000000000
R13: ffff888042b4c0e0 R14: ffff88814de40d00 R15: dffffc0000000000
FS:  00007f9563d546c0(0000) GS:ffff888125bed000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3341eff8 CR3: 000000005bfbc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000097 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5bb/0x640 fs/hfs/btree.c:291
 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+0x16fc/0x3490 fs/direct-io.c:1243
 blockdev_direct_IO include/linux/fs.h:3503 [inline]
 hfs_direct_IO+0x119/0x220 fs/hfs/inode.c:132
 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4109
 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4278
 generic_file_write_iter+0x117/0x550 mm/filemap.c:4318
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x548/0xa90 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 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: 0033:0x7f9562f8e929
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:00007f9563d54038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f95631b5fa0 RCX: 00007f9562f8e929
RDX: 0000000000004000 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007f9563d54090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f95631b5fa0 R15: 00007fff07d6c3a8
 </TASK>