hfs: new node 0 already hashed?
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1
WARNING: fs/hfs/bnode.c:520 at hfs_bnode_create+0x461/0x4f0, CPU#0: syz.2.492/9530
Modules linked in:
CPU: 0 UID: 0 PID: 9530 Comm: syz.2.492 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:hfs_bnode_create+0x461/0x4f0
Code: 67 8b 89 ee e8 20 9c 7e fe e9 cf fc ff ff e8 e6 0c 1c ff 4c 89 ef e8 ce 24 82 08 48 c7 c7 a0 c2 67 8b 89 ee e8 00 9c 7e fe 90 <0f> 0b 90 eb b0 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c d6 fb ff ff
RSP: 0000:ffffc90008a16880 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff88817bd08000 RCX: 642a748bd1a17d00
RDX: ffffc900267d6000 RSI: 00000000000028ae RDI: 00000000000028af
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52001142cc1 R12: 0000000000000000
R13: ffff88817bd080d0 R14: ffff888115061200 R15: dffffc0000000000
FS:  00007f4dec2966c0(0000) GS:ffff88818e91f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4de3a96000 CR3: 000000016ef14000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5c1/0x650
 hfs_btree_inc_height+0x100/0xad0
 hfs_brec_insert+0x7ef/0xc90
 __hfs_ext_write_extent+0x2a1/0x470
 __hfs_ext_cache_extent+0x6b/0x9b0
 hfs_extend_file+0x39b/0x15e0
 hfs_get_block+0x412/0xc50
 __blockdev_direct_IO+0x1645/0x3470
 hfs_direct_IO+0x11b/0x220
 generic_file_direct_write+0x1dc/0x3e0
 __generic_file_write_iter+0x120/0x240
 generic_file_write_iter+0x14b/0x690
 iter_file_splice_write+0x9a6/0x10f0
 direct_splice_actor+0x104/0x160
 splice_direct_to_actor+0x545/0xc80
 do_splice_direct+0x19b/0x2a0
 do_sendfile+0x547/0x7e0
 __se_sys_sendfile64+0x144/0x1a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4dee03cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4dec296028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f4dee2b5fa0 RCX: 00007f4dee03cdd9
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000005
RBP: 00007f4dee0d2d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4dee2b6038 R14: 00007f4dee2b5fa0 R15: 00007ffeb5b01fa8
 </TASK>
