syzbot

memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4991 'syz-executor122'
loop0: detected capacity change from 0 to 64
hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4991 at fs/hfs/bnode.c:422 hfs_bnode_create+0x3b1/0x440 fs/hfs/bnode.c:421
Modules linked in:
CPU: 0 PID: 4991 Comm: syz-executor122 Not tainted 6.4.0-rc2-syzkaller-00330-g0dd2a6fb1e34 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:hfs_bnode_create+0x3b1/0x440 fs/hfs/bnode.c:422
Code: 8a 44 89 e6 e8 50 44 49 08 e9 7c fd ff ff e8 c6 e2 27 ff 4c 89 ff e8 9e 55 55 08 48 c7 c7 60 c9 ff 8a 44 89 e6 e8 2f 44 49 08 <0f> 0b eb b5 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 89 fc ff ff 48 89
RSP: 0018:ffffc90003a3ef98 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff888013f38700 RCX: 36d0e8c779446200
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff816efdbc R09: fffff52000747da9
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888029d72000 R15: ffff888029d720e0
FS:  0000555556a48300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020008000 CR3: 0000000075492000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5a6/0x640 fs/hfs/btree.c:291
 hfs_btree_inc_height+0x11e/0xd20 fs/hfs/brec.c:471
 hfs_brec_insert+0x15b/0xbd0 fs/hfs/brec.c:77
 __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+0x344/0x1440 fs/hfs/extent.c:401
 hfs_get_block+0x3e4/0xb60 fs/hfs/extent.c:353
 __block_write_begin_int+0x548/0x1a50 fs/buffer.c:2064
 __block_write_begin fs/buffer.c:2114 [inline]
 block_write_begin+0x9c/0x1f0 fs/buffer.c:2175
 cont_write_begin+0x643/0x880 fs/buffer.c:2534
 hfs_write_begin+0x8a/0xd0 fs/hfs/inode.c:58
 generic_perform_write+0x300/0x5e0 mm/filemap.c:3923
 __generic_file_write_iter+0x17a/0x400 mm/filemap.c:4051
 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4083
 call_write_iter include/linux/fs.h:1868 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x790/0xb20 fs/read_write.c:584
 ksys_write+0x1a0/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f20c5d427b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffe7bacaf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f20c5d427b9
RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004
RBP: 00007f20c5d02050 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000024c R11: 0000000000000246 R12: 00007f20c5d020e0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>