syzbot

RAX: ffffffffffffffda RBX: 00007ffc9da3de90 RCX: 00007f8909c1dbd9
RDX: 000000000208e24b RSI: 0000200000000240 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00007ffc9da3dc07 R09: 00007ffc9da3deb0
R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffc9da3de8c
R13: 0000000000000018 R14: 431bde82d7b634db R15: 00007ffc9da3ded0
 </TASK>
hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4190 at fs/hfs/bnode.c:438 hfs_bnode_create+0x3d1/0x450 fs/hfs/bnode.c:437
Modules linked in:
CPU: 1 PID: 4190 Comm: syz-executor131 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:hfs_bnode_create+0x3d1/0x450 fs/hfs/bnode.c:438
Code: 72 1f 8a 89 ee e8 af ea 69 07 e9 57 fd ff ff e8 b5 f9 4a ff 4c 89 ef e8 0d c7 7d 07 48 c7 c7 60 72 1f 8a 89 ee e8 8f ea 69 07 <0f> 0b eb b7 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 63 fc ff ff 4c
RSP: 0018:ffffc90002dbefd0 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff88807aa18000 RCX: 19b27816fd3fdc00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff520005b7d5d
R10: fffff520005b7d5d R11: 1ffff920005b7d5c R12: 0000000000000000
R13: ffff88807aa180e0 R14: ffff888019fdd200 R15: dffffc0000000000
FS:  0000555576b88380(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 0000000074c12000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5b2/0x660 fs/hfs/btree.c:288
 hfs_btree_inc_height+0xf3/0xac0 fs/hfs/brec.c:471
 hfs_brec_insert+0x73e/0xbc0 fs/hfs/brec.c:148
 __hfs_ext_write_extent+0x2a1/0x470 fs/hfs/extent.c:124
 __hfs_ext_cache_extent+0x6b/0x9b0 fs/hfs/extent.c:174
 hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
 hfs_extend_file+0x313/0x1280 fs/hfs/extent.c:401
 hfs_get_block+0x3d4/0xbd0 fs/hfs/extent.c:353
 __block_write_begin_int+0x54e/0x15a0 fs/buffer.c:2012
 __block_write_begin fs/buffer.c:2062 [inline]
 block_write_begin fs/buffer.c:2122 [inline]
 cont_write_begin+0x58a/0x7b0 fs/buffer.c:2471
 hfs_write_begin+0x92/0xe0 fs/hfs/inode.c:59
 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785
 __generic_file_write_iter+0x25f/0x4e0 mm/filemap.c:3912
 generic_file_write_iter+0xa6/0x1b0 mm/filemap.c:3944
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x712/0xd00 fs/read_write.c:594
 ksys_write+0x14d/0x250 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8909c1dbd9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1b 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc9da3de68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffc9da3de90 RCX: 00007f8909c1dbd9
RDX: 000000000208e24b RSI: 0000200000000240 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00007ffc9da3dc07 R09: 00007ffc9da3deb0
R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffc9da3de8c
R13: 0000000000000018 R14: 431bde82d7b634db R15: 00007ffc9da3ded0
 </TASK>