hfsplus: new node 0 already hashed?
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WARNING: fs/hfsplus/bnode.c:631 at hfsplus_bnode_create+0x45d/0x4f0 fs/hfsplus/bnode.c:631, CPU#0: syz.6.497/9983
Modules linked in:
CPU: 0 UID: 0 PID: 9983 Comm: syz.6.497 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:hfsplus_bnode_create+0x45d/0x4f0 fs/hfsplus/bnode.c:631
Code: 66 8b 89 ee e8 54 1c 85 fe e9 cf fc ff ff e8 1a 0d 22 ff 4c 89 f7 e8 c2 d6 81 08 48 c7 c7 a0 ed 66 8b 89 ee e8 34 1c 85 fe 90 <0f> 0b 90 49 c7 c5 ef ff ff ff eb a9 44 89 f9 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90004286c20 EFLAGS: 00010246
RAX: 0000000000000023 RBX: dffffc0000000000 RCX: b97767baa0341900
RDX: ffffc90006671000 RSI: 0000000000004e9a RDI: 0000000000004e9b
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000850d35 R12: 0000000000000000
R13: ffff888051114000 R14: ffff8880511140d0 R15: ffff888026e24e00
FS:  00007fcf2c2e66c0(0000) GS:ffff888126343000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2fd92d0000 CR3: 00000000283ec000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x747/0xb00 fs/hfsplus/btree.c:421
 hfs_btree_inc_height+0x10c/0xb80 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x13f/0xd70 fs/hfsplus/brec.c:75
 hfsplus_create_attr_nolock+0x1cb/0x5e0 fs/hfsplus/attributes.c:238
 hfsplus_create_attr+0x213/0x3a0 fs/hfsplus/attributes.c:279
 __hfsplus_setxattr+0x698/0x29f0 fs/hfsplus/xattr.c:366
 hfsplus_initxattrs+0x1ae/0x280 fs/hfsplus/xattr_security.c:59
 security_inode_init_security+0x296/0x3d0 security/security.c:1344
 hfsplus_fill_super+0x13b0/0x19e0 fs/hfsplus/super.c:612
 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694
 vfs_get_tree+0x92/0x2a0 fs/super.c:1754
 fc_mount fs/namespace.c:1193 [inline]
 do_new_mount_fc fs/namespace.c:3760 [inline]
 do_new_mount+0x341/0xd30 fs/namespace.c:3836
 do_mount fs/namespace.c:4159 [inline]
 __do_sys_mount fs/namespace.c:4348 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4325
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf2e08d8ca
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcf2c2e5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fcf2c2e5ee0 RCX: 00007fcf2e08d8ca
RDX: 0000200000000000 RSI: 0000200000000200 RDI: 00007fcf2c2e5ea0
RBP: 0000200000000000 R08: 00007fcf2c2e5ee0 R09: 0000000000000080
R10: 0000000000000080 R11: 0000000000000246 R12: 0000200000000200
R13: 00007fcf2c2e5ea0 R14: 0000000000000713 R15: 0000200000000280
 </TASK>