bi_mtime=200535484
    bi_otime=200535484
    bi_uid=0
    bi_gid=0
    bi_nlink=0
    bi_generation=0
    bi_dev=0
    bi_data_checksum=0
    bi_compression=0
    bi_project=0
    bi_background_compression=0
    bi_data_replicas=0
    bi_promote_target=0
    bi_foreground_target=0
    bi_background_target=0
    bi_erasure_code=0
    bi_fields_set=0
    bi_dir=4096
    bi_dir_offset=8130059955150870709
    bi_subvol=0
    bi_parent_subvol=0
    bi_nocow=0
    bi_depth=0
    bi_inodes_32bit=0
    bi_casefold=0, fixing
 done
bcachefs (loop0): check_dirents...
bcachefs (loop0): dirent points to missing inode:
  u64s 8 type dirent 4096:8130059955150870709:U32_MAX len 0 ver 0: lost+found -> 65537 type dir, fixing
 done
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): set_fs_needs_rebalance... done
bcachefs (loop0): Fixed errors, running fsck a second time to verify fs is clean
bcachefs (loop0): check_extents_to_backpointers... done
bcachefs (loop0): check_snapshots... done
bcachefs (loop0): check_subvols... done
bcachefs (loop0): check_inodes... done
bcachefs (loop0): check_dirents...
bcachefs (loop0): directory with wrong i_nlink: got 2, should be 1
  /, fixing
 done
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): set_fs_needs_rebalance... done
bcachefs (loop0): Second fsck run was not clean
bcachefs (loop0): done starting filesystem
bcachefs (loop0): requested incompat feature 1.16: reflink_p_may_update_opts currently not enabled, allowed up to 1.16: reflink_p_may_update_opts
  set version_upgrade=incompat to enable
------------[ cut here ]------------
kernel BUG at fs/bcachefs/fs.c:1323!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5353 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:bch2_fill_extent+0x96e/0x970 fs/bcachefs/fs.c:1323
Code: 0f 0b e8 e5 a8 7f fd 90 0f 0b e8 dd a8 7f fd e9 f7 fe ff ff e8 d3 a8 7f fd 90 0f 0b e8 cb a8 7f fd 90 0f 0b e8 c3 a8 7f fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc9000d3d76a0 EFLAGS: 00010287
RAX: ffffffff8440127d RBX: 0000000000000018 RCX: 0000000000100000
RDX: ffffc9000ded2000 RSI: 000000000000174f RDI: 0000000000001750
RBP: 0000000000000001 R08: ffff88803e7a2440 R09: 0000000000000004
R10: 0000000000000012 R11: 0000000000000002 R12: 0000000000000000
R13: ffffc9000d3d7b28 R14: 0000000000000002 R15: 0000000000000002
FS:  00007f23bd6196c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f488096f000 CR3: 0000000043e09000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 bch2_fiemap+0x2871/0x2a90 fs/bcachefs/fs.c:1538
 ioctl_fiemap fs/ioctl.c:220 [inline]
 do_vfs_ioctl+0x1170/0x1430 fs/ioctl.c:532
 __do_sys_ioctl fs/ioctl.c:596 [inline]
 __se_sys_ioctl+0x82/0x170 fs/ioctl.c:584
 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: 0033:0x7f23bc78ebe9
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:00007f23bd619038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f23bc9b5fa0 RCX: 00007f23bc78ebe9
RDX: 0000200000005dc0 RSI: 00000000c020660b RDI: 0000000000000006
RBP: 00007f23bc811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f23bc9b6038 R14: 00007f23bc9b5fa0 R15: 00007ffe41228458
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_fill_extent+0x96e/0x970 fs/bcachefs/fs.c:1323
Code: 0f 0b e8 e5 a8 7f fd 90 0f 0b e8 dd a8 7f fd e9 f7 fe ff ff e8 d3 a8 7f fd 90 0f 0b e8 cb a8 7f fd 90 0f 0b e8 c3 a8 7f fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc9000d3d76a0 EFLAGS: 00010287
RAX: ffffffff8440127d RBX: 0000000000000018 RCX: 0000000000100000
RDX: ffffc9000ded2000 RSI: 000000000000174f RDI: 0000000000001750
RBP: 0000000000000001 R08: ffff88803e7a2440 R09: 0000000000000004
R10: 0000000000000012 R11: 0000000000000002 R12: 0000000000000000
R13: ffffc9000d3d7b28 R14: 0000000000000002 R15: 0000000000000002
FS:  00007f23bd6196c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002a00 CR3: 0000000043e09000 CR4: 0000000000352ef0