hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4353 at fs/hfsplus/bnode.c:573 hfsplus_bnode_create+0x3ad/0x440 fs/hfsplus/bnode.c:572
Modules linked in:
CPU: 0 PID: 4353 Comm: syz-executor.0 Not tainted 6.1.87-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:hfsplus_bnode_create+0x3ad/0x440 fs/hfsplus/bnode.c:573
Code: 8b 44 89 e6 e8 74 a4 28 08 e9 7c fd ff ff e8 1a af 2a ff 4c 89 ff e8 62 e9 34 08 48 c7 c7 e0 63 02 8b 44 89 e6 e8 53 a4 28 08 <0f> 0b eb b5 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 89 fc ff ff 48 89
RSP: 0018:ffffc90013b27438 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888079aabd00 RCX: 24be6d71a9cc3c00
RDX: ffffc90003ad1000 RSI: 0000000000017389 RDI: 000000000001738a
RBP: 0000000000000000 R08: ffffffff816e2d9c R09: fffff52002764e29
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805a0a0000 R15: ffff88805a0a00e0
FS:  00007f45f6ac56c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31a27000 CR3: 000000007488b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x596/0x630 fs/hfsplus/btree.c:415
 hfs_btree_inc_height+0x11a/0xdb0 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x162/0xdd0 fs/hfsplus/brec.c:75
 __hfsplus_ext_write_extent+0x36b/0x5b0 fs/hfsplus/extents.c:107
 __hfsplus_ext_cache_extent+0x84/0xe00 fs/hfsplus/extents.c:186
 hfsplus_file_truncate+0x4c9/0xb40 fs/hfsplus/extents.c:598
 hfsplus_write_begin+0xc2/0xd0 fs/hfsplus/inode.c:56
 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3817
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3945
 generic_file_write_iter+0xab/0x310 mm/filemap.c:3977
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7ae/0xba0 fs/read_write.c:584
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f45f5c7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f45f6ac50c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f45f5dabf80 RCX: 00007f45f5c7dea9
RDX: 0000000000010010 RSI: 0000000020020240 RDI: 0000000000000004
RBP: 00007f45f5cca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f45f5dabf80 R15: 00007ffe89c145a8
 </TASK>