bcachefs (loop0): Using encoding defined by superblock: utf8-12.1.0
bcachefs (loop0): recovering from clean shutdown, journal seq 10
bcachefs (loop0): Version upgrade from 1.13: inode_has_child_snapshots to 1.7: mi_btree_bitmap incomplete
Doing compatible version upgrade from 1.13: inode_has_child_snapshots to 1.28: inode_has_case_insensitive
  running recovery passes: check_allocations,check_extents_to_backpointers,check_inodes
bcachefs (loop0): invalid bkey in btree_node btree=inodes level=0: u64s 17 type inode_v3 0:4097:U32_MAX len 0 ver 0: (unpack error)
  invalid variable length fields, deleting
bcachefs (loop0): btree node read error at btree dirents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 9aa2895aefce4bdf written 24 min_key POS_MIN durability: 1 ptr: 0:41:0 gen 0
  loop0 node offset 0/24 bset u64s 0: incorrect max key 281483566645247:U64_MAX:U32_MAX
  flagging btree dirents lost data
  running recovery pass check_lrus (14), currently at recovery_pass_empty (0)
  running recovery pass check_backpointers_to_extents (16), currently at recovery_pass_empty (0)
  running recovery pass scan_for_btree_nodes (1), currently at recovery_pass_empty (0)
  ret btree_node_read_validate_error
bcachefs (loop0): error reading btree root btree=dirents level=0: btree_node_read_error, fixing
bcachefs (loop0): invalid bkey in btree_node btree=alloc level=0: u64s 12 type alloc_v4 0:28:0 len 0 ver 0: 
    gen 0 oldest_gen 0 data_type btree
    journal_seq_nonempty 6
    journal_seq_empty    0
    need_discard         1
    need_inc_gen         1
    dirty_sectors        0
    stripe_sectors       1769482
    cached_sectors       0
    stripe               0
    stripe_redundancy    0
    io_time[READ]        1
    io_time[WRITE]       768
    fragmentation     0
    bp_start          7
  
  invalid data type (got 3 should be 9), deleting
bcachefs (loop0): check_topology...
bcachefs (loop0): btree root dirents unreadable, must recover from scan
bcachefs (loop0): running recovery pass scan_for_btree_nodes (1), currently at check_topology (2) - rewinding
bcachefs (loop0): bch2_check_root(): error restart_recovery
bcachefs (loop0): scan_for_btree_nodes...
bcachefs (loop0): btree node scan found 3 nodes after overwrites
 done
bcachefs (loop0): check_topology...
bcachefs (loop0): btree root dirents unreadable, must recover from scan
bcachefs (loop0): no nodes found for btree dirents, continuing
 done
bcachefs (loop0): accounting_read... done
bcachefs (loop0): alloc_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): Fixed errors, running fsck a second time to verify fs is clean
bcachefs (loop0): done starting filesystem
------------[ cut here ]------------
UBSAN: shift-out-of-bounds in drivers/comedi/drivers/pcl726.c:331:46
shift exponent -2147450880 is negative
CPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 Not tainted 6.16.0-rc4-syzkaller-00324-g1f988d0788f5 #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
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 ubsan_epilogue+0xa/0x40 lib/ubsan.c:233
 __ubsan_handle_shift_out_of_bounds+0x386/0x410 lib/ubsan.c:494
 pcl726_attach+0xac4/0xd50 drivers/comedi/drivers/pcl726.c:331
 comedi_device_attach+0x520/0x670 drivers/comedi/drivers.c:996
 do_devconfig_ioctl drivers/comedi/comedi_fops.c:855 [inline]
 comedi_unlocked_ioctl+0x686/0xf40 drivers/comedi/comedi_fops.c:2136
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 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: 0033:0x7f234378e929
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:00007f2344566038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f23439b5fa0 RCX: 00007f234378e929
RDX: 0000200000000080 RSI: 0000000040946400 RDI: 0000000000000008
RBP: 00007f2343810b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f23439b5fa0 R15: 00007fff76847c78
 </TASK>
---[ end trace ]---