syzbot

loop0: detected capacity change from 0 to 1024
hfsplus: new node 0 already hashed?
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WARNING: CPU: 0 PID: 4429 at fs/hfsplus/bnode.c:671 hfsplus_bnode_create+0x37a/0x400 fs/hfsplus/bnode.c:670
Modules linked in:
CPU: 0 PID: 4429 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:hfsplus_bnode_create+0x37a/0x400 fs/hfsplus/bnode.c:671
Code: 8b a2 8a 89 ee e8 56 e8 c6 07 e9 ab fd ff ff e8 8c 31 3b ff 48 89 df e8 54 0c dc 07 48 c7 c7 60 8b a2 8a 89 ee e8 36 e8 c6 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:ffffc900034f70c0 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff8880196b80e0 RCX: 4b8bd76965dbc300
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff5200069edb9
R10: fffff5200069edb9 R11: 1ffff9200069edb8 R12: 0000000000000000
R13: ffff8880196b8000 R14: ffff888072cb2200 R15: dffffc0000000000
FS:  000055557c692500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe471189000 CR3: 0000000027eeb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x52b/0x5b0 fs/hfsplus/btree.c:415
 hfs_bnode_split+0xc9/0xee0 fs/hfsplus/brec.c:245
 hfsplus_brec_insert+0x38b/0xcc0 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0x3b0/0x1020 fs/hfsplus/catalog.c:292
 hfsplus_fill_super+0x12f6/0x1b90 fs/hfsplus/super.c:560
 mount_bdev+0x287/0x3c0 fs/super.c:1443
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1573
 do_new_mount+0x24a/0xa40 fs/namespace.c:3069
 do_mount fs/namespace.c:3412 [inline]
 __do_sys_mount fs/namespace.c:3620 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3597
 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: 0033:0x7fd527d9066a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd98753bf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd98753c80 RCX: 00007fd527d9066a
RDX: 0000200000000000 RSI: 0000200000000040 RDI: 00007ffd98753c40
RBP: 0000200000000000 R08: 00007ffd98753c80 R09: 0000000002000010
R10: 0000000002000010 R11: 0000000000000246 R12: 0000200000000040
R13: 00007ffd98753c40 R14: 000000000000064b R15: 0000200000000440
 </TASK>