hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5016 at fs/hfsplus/bnode.c:573 hfsplus_bnode_create+0x14c/0x530 fs/hfsplus/bnode.c:572
Modules linked in:
CPU: 0 PID: 5016 Comm: syz-executor174 Not tainted 6.4.0-syzkaller-11312-gb5641a5d8b8b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:hfsplus_bnode_create+0x14c/0x530 fs/hfsplus/bnode.c:573
Code: 89 ef 44 89 fe e8 14 a1 34 ff 44 39 fd 75 9b e8 6a a5 34 ff 4c 89 f7 e8 c2 1e d2 07 89 ee 48 c7 c7 80 cd 86 8a e8 54 4e 18 ff <0f> 0b e8 4d a5 34 ff 4c 89 e0 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e
RSP: 0018:ffffc900034ff2f0 EFLAGS: 00010282
RAX: 0000000000000023 RBX: ffff888074afe000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81683abc RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: ffff88802048c700
R13: dffffc0000000000 R14: ffff888074afe0e0 R15: 0000000000000000
FS:  0000555555e32300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020011000 CR3: 0000000024729000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x6d0/0x7d0 fs/hfsplus/btree.c:415
 hfs_btree_inc_height.isra.0+0xe6/0x9e0 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x9e5/0xc40 fs/hfsplus/brec.c:75
 __hfsplus_ext_write_extent+0x479/0x5b0 fs/hfsplus/extents.c:107
 __hfsplus_ext_cache_extent fs/hfsplus/extents.c:186 [inline]
 hfsplus_ext_read_extent+0x845/0xae0 fs/hfsplus/extents.c:218
 hfsplus_file_extend+0x684/0xf90 fs/hfsplus/extents.c:461
 hfsplus_get_block+0x1b3/0x9b0 fs/hfsplus/extents.c:245
 __block_write_begin_int+0x3b1/0x14a0 fs/buffer.c:2128
 __block_write_begin fs/buffer.c:2178 [inline]
 block_write_begin+0xb9/0x4d0 fs/buffer.c:2239
 cont_write_begin+0x534/0x740 fs/buffer.c:2597
 hfsplus_write_begin+0x87/0x150 fs/hfsplus/inode.c:52
 generic_perform_write+0x26b/0x5d0 mm/filemap.c:3923
 __generic_file_write_iter+0x1f8/0x240 mm/filemap.c:4018
 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4044
 call_write_iter include/linux/fs.h:1871 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x981/0xda0 fs/read_write.c:584
 ksys_write+0x122/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9670b017c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe4da04d28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9670b017c9
RDX: 00000000fffffdef RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007f9670ac1060 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000061e R11: 0000000000000246 R12: 00007f9670ac10f0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>