R10: 0000000000005412 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f7f8f9b5fa0 R15: 00007fff788882d8
 </TASK>
hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6237 at fs/hfs/bnode.c:428 hfs_bnode_create+0x3b9/0x450 fs/hfs/bnode.c:428
Modules linked in:
CPU: 1 UID: 0 PID: 6237 Comm: syz.4.42 Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:hfs_bnode_create+0x3b9/0x450 fs/hfs/bnode.c:428
Code: 44 89 e6 e8 19 f3 7c fe e9 78 fd ff ff e8 8f a7 18 ff 4c 89 ff e8 37 6b 80 09 48 c7 c7 c0 70 61 8c 44 89 e6 e8 f8 f2 7c fe 90 <0f> 0b 90 eb af 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 80 fc ff ff 48
RSP: 0018:ffffc90003e8eab8 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff88801f68b700 RCX: e7baabd0b2921200
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81a21cac R09: 1ffff920007d1cf4
R10: dffffc0000000000 R11: fffff520007d1cf5 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88807b97a000 R15: ffff88807b97a0e0
FS:  00007f7f9058d6c0(0000) GS:ffff8881250cf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555673b8588 CR3: 000000005cbcc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5e3/0x690 fs/hfs/btree.c:291
 hfs_btree_inc_height+0x117/0xe20 fs/hfs/brec.c:471
 hfs_brec_insert+0x727/0xbe0 fs/hfs/brec.c:148
 __hfs_ext_write_extent+0x2f2/0x4f0 fs/hfs/extent.c:124
 __hfs_ext_cache_extent+0x6a/0x990 fs/hfs/extent.c:174
 hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
 hfs_extend_file+0x346/0x13e0 fs/hfs/extent.c:401
 hfs_get_block+0x40d/0xb80 fs/hfs/extent.c:353
 __block_write_begin_int+0x691/0x1930 fs/buffer.c:2116
 block_write_begin fs/buffer.c:2227 [inline]
 cont_write_begin+0x781/0xb40 fs/buffer.c:2566
 hfs_write_begin+0x68/0xb0 fs/hfs/inode.c:52
 cont_expand_zero fs/buffer.c:2493 [inline]
 cont_write_begin+0x32d/0xb40 fs/buffer.c:2556
 hfs_write_begin+0x68/0xb0 fs/hfs/inode.c:52
 generic_perform_write+0x329/0xa10 mm/filemap.c:4103
 generic_file_write_iter+0x10e/0x5e0 mm/filemap.c:4246
 do_iter_readv_writev+0x71f/0x9d0 fs/read_write.c:-1
 vfs_writev+0x38d/0xbc0 fs/read_write.c:1055
 do_pwritev fs/read_write.c:1151 [inline]
 __do_sys_pwritev2 fs/read_write.c:1209 [inline]
 __se_sys_pwritev2+0x1b8/0x2d0 fs/read_write.c:1200
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f8f78e969
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:00007f7f9058d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f7f8f9b5fa0 RCX: 00007f7f8f78e969
RDX: 0000000000000001 RSI: 0000200000000100 RDI: 0000000000000005
RBP: 00007f7f9058d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000005412 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f7f8f9b5fa0 R15: 00007fff788882d8
 </TASK>