hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9521 at fs/hfsplus/bnode.c:630 hfsplus_bnode_create+0x37a/0x400 fs/hfsplus/bnode.c:629
Modules linked in:
CPU: 0 PID: 9521 Comm: syz.6.1066 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:hfsplus_bnode_create+0x37a/0x400 fs/hfsplus/bnode.c:630
Code: 83 82 8a 89 ee e8 16 a8 bf 07 e9 ab fd ff ff e8 cc 21 3b ff 48 89 df e8 a4 be d4 07 48 c7 c7 60 83 82 8a 89 ee e8 f6 a7 bf 07 <0f> 0b eb b7 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c b7 fc ff ff 4c
RSP: 0018:ffffc9000d066fe0 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888073a0c0e0 RCX: 09ac88c1fa7e0500
RDX: ffffc9000cad9000 RSI: 000000000001c5ac RDI: 000000000001c5ad
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff52001a0cd9d
R10: fffff52001a0cd9d R11: 1ffff92001a0cd9c R12: 0000000000000000
R13: ffff888073a0c000 R14: ffff88802ea1ba00 R15: dffffc0000000000
FS:  00007fc8c56d86c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002080 CR3: 000000007726a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x609/0x9b0 fs/hfsplus/btree.c:421
 hfs_btree_inc_height+0xf3/0xb60 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x12a/0xcc0 fs/hfsplus/brec.c:75
 hfsplus_create_attr+0x3e1/0x540 fs/hfsplus/attributes.c:252
 __hfsplus_setxattr+0x658/0x1f70 fs/hfsplus/xattr.c:358
 hfsplus_setxattr+0xd8/0x120 fs/hfsplus/xattr.c:438
 hfsplus_trusted_setxattr+0x3c/0x50 fs/hfsplus/xattr_trusted.c:30
 __vfs_setxattr+0x3e0/0x420 fs/xattr.c:182
 __vfs_setxattr_noperm+0x129/0x5e0 fs/xattr.c:216
 vfs_setxattr+0x168/0x2f0 fs/xattr.c:309
 do_setxattr fs/xattr.c:594 [inline]
 setxattr+0x2b2/0x2d0 fs/xattr.c:617
 path_setxattr+0x142/0x280 fs/xattr.c:636
 __do_sys_setxattr fs/xattr.c:652 [inline]
 __se_sys_setxattr fs/xattr.c:648 [inline]
 __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc8c478f749
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:00007fc8c56d8038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007fc8c49e6090 RCX: 00007fc8c478f749
RDX: 0000200000000380 RSI: 0000200000000100 RDI: 00002000000000c0
RBP: 00007fc8c4813f91 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000381 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc8c49e6128 R14: 00007fc8c49e6090 R15: 00007ffdb41a13a8
 </TASK>