loop0: detected capacity change from 0 to 32768
bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,gc_reserve_bytes=64.0 KiB,nojournal_transaction_names,read_only
  allowing incompatible features above 0.0: (unknown version)
  features: lz4,new_siphash,inline_data,new_extent_overwrite,btree_ptr_v2,new_varint,journal_no_flush,alloc_v2,extents_across_btree_nodes
bcachefs (loop0): Using encoding defined by superblock: utf8-12.1.0
------------[ cut here ]------------
precision 41609 too large
WARNING: CPU: 0 PID: 5363 at lib/vsprintf.c:2794 set_precision lib/vsprintf.c:2794 [inline]
WARNING: CPU: 0 PID: 5363 at lib/vsprintf.c:2794 vsnprintf+0xb0c/0xf00 lib/vsprintf.c:2899
Modules linked in:
CPU: 0 UID: 0 PID: 5363 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:set_precision lib/vsprintf.c:2794 [inline]
RIP: 0010:vsnprintf+0xb0c/0xf00 lib/vsprintf.c:2899
Code: e8 59 6d 47 f6 49 89 ef e9 03 f6 ff ff e8 4c 6d 47 f6 c6 05 88 62 35 04 01 90 48 c7 c7 a0 4e db 8c 44 89 fe e8 e5 f8 0a f6 90 <0f> 0b 90 90 e9 ba fc ff ff 89 e9 80 e1 07 38 c1 7c ba 48 89 ef e8
RSP: 0018:ffffc9000d42e770 EFLAGS: 00010246
RAX: d5e2fdb31733c000 RBX: dffffc0000000000 RCX: 0000000000100000
RDX: ffffc9000e09a000 RSI: 000000000002d557 RDI: 000000000002d558
RBP: ffffffff8bf4572e R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1c3a22c R12: ffffc9000d42e8a0
R13: ffff888052312069 R14: 0000000000000003 R15: 000000000000a289
FS:  00007fbe1ed796c0(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7ea55909c0 CR3: 000000003f349000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 bch2_prt_printf+0x1c6/0x740 fs/bcachefs/printbuf.c:183
 bch2_dirent_to_text+0x2bd/0xd20 fs/bcachefs/dirent.c:220
 __bch2_bkey_fsck_err+0x3f7/0x540 fs/bcachefs/error.c:691
 __bch2_bkey_validate+0x972/0xe30 fs/bcachefs/bkey_methods.c:196
 bch2_bkey_validate+0xf3/0x4e0 fs/bcachefs/bkey_methods.c:250
 journal_validate_key+0x631/0xe50 fs/bcachefs/journal_io.c:388
 journal_entry_btree_root_validate+0x22a/0x620 fs/bcachefs/journal_io.c:480
 bch2_journal_entry_validate+0x15e/0x220 fs/bcachefs/journal_io.c:874
 bch2_sb_clean_validate_late+0x16c/0x330 fs/bcachefs/sb-clean.c:44
 bch2_read_superblock_clean+0xd9/0x260 fs/bcachefs/sb-clean.c:172
 bch2_fs_recovery+0x158/0x3a50 fs/bcachefs/recovery.c:738
 bch2_fs_start+0xaaf/0xda0 fs/bcachefs/super.c:1213
 bch2_fs_get_tree+0xb39/0x1520 fs/bcachefs/fs.c:2488
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4324
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbe1df9034a
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:00007fbe1ed78e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fbe1ed78ef0 RCX: 00007fbe1df9034a
RDX: 00002000000000c0 RSI: 0000200000000000 RDI: 00007fbe1ed78eb0
RBP: 00002000000000c0 R08: 00007fbe1ed78ef0 R09: 0000000000804001
R10: 0000000000804001 R11: 0000000000000246 R12: 0000200000000000
R13: 00007fbe1ed78eb0 R14: 00000000000059ac R15: 0000200000000100
 </TASK>