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,no_splitbrain_check,fsck,fix_errors=no,norecovery,recovery_pass_last=check_dirents,nojournal_transaction_names
  allowing incompatible features above 0.0: (unknown version)
bcachefs (loop0): recovering from clean shutdown, journal seq 10
bcachefs (loop0): Version upgrade required:
Version upgrade from 0.24: unwritten_extents to 1.7: mi_btree_bitmap incomplete
Doing incompatible version upgrade from 0.24: unwritten_extents to 1.25: extent_flags
  running recovery passes: check_allocations,check_alloc_info,check_lrus,check_btree_backpointers,check_backpointers_to_extents,check_extents_to_backpointers,check_alloc_to_lru_refs,bucket_gens_init,check_snapshot_trees,check_snapshots,check_subvols,check_subvol_children,delete_dead_snapshots,check_inodes,check_extents,check_indirect_extents,check_dirents,check_xattrs,check_root,check_unreachable_inodes,check_subvolume_structure,check_directory_structure,check_nlinks,set_fs_needs_rebalance
bcachefs (loop0): invalid btree id 251 (max 63), not fixing
bcachefs (loop0): running explicit recovery pass check_topology (2), currently at recovery_pass_empty (0)
bcachefs (loop0): bcachefs (loop0): error validating btree node on loop0 at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 98c59c5 written 0 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0
  node offset 0/0: got wrong btree node: got
  btree=extents level=0 seq c6c25c03258c59c5 1
  min: POS_MIN
  max: SPOS_MAX, btree topology error: 
bcachefs (loop0): flagging btree extents lost data
bcachefs (loop0): running explicit recovery pass scan_for_btree_nodes (1), currently at recovery_pass_empty (0)
bcachefs (loop0): error reading btree root btree=extents level=0: btree_node_read_error, fixing
bcachefs (loop0): bcachefs (loop0): error validating btree node on loop0 at btree xattrs level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 2285c34bed0abe32 written 16 min_key POS_MIN durability: 1 ptr: 0:31:0 gen 0
  node offset 0/16 bset u64s 0: incorrect max key U64_MAX:18374686479671623680:50331647, btree topology error: 
bcachefs (loop0): flagging btree xattrs lost data
bcachefs (loop0): error reading btree root btree=xattrs level=0: btree_node_read_error, fixing
bcachefs (loop0): bcachefs (loop0): error validating btree node at btree alloc level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ac62141f8dc7e261 written 24 min_key POS_MIN durability: 1 ptr: 0:26:0 gen 0
  node offset 8/24 bset u64s 375 bset byte offset 184: keys out of order: u64s 11 type alloc_v4 0:32:0 len 0 ver 0 > u64s 11 type alloc_v4 0:2:0 len 0 ver 0, fixing
bcachefs (loop0): btree_node_read_work: rewriting btree node at due to error
  btree=alloc level=0 u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ac62141f8dc7e261 written 24 min_key POS_MIN durability: 1 ptr: 0:26:0 gen 0
bcachefs (loop0): bcachefs (loop0): error validating btree node on loop0 at btree backpointers level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 4a8b0fa43a9980a6 written 24 min_key POS_MIN durability: 1 ptr: 0:37:0 gen 0
  node offset 0/24 bset u64s 0: invalid bkey format: field 2 too large: 4294967295 + 2251799813685248 > 4294967295
  u64s 3 fields 64:0, 64:0, 32:2251799813685248, 0:0, 0:0, 0:0, btree topology error: 
bcachefs (loop0): flagging btree backpointers lost data
bcachefs (loop0): error reading btree root btree=backpointers level=0: btree_node_read_error, fixing
------------[ cut here ]------------
UBSAN: shift-out-of-bounds in fs/bcachefs/btree_cache.c:218:18
shift exponent 251 is too large for 64-bit type 'unsigned long long'
CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted 6.15.0-rc4-syzkaller-00042-gb6ea1680d0ac #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:231
 __ubsan_handle_shift_out_of_bounds+0x386/0x410 lib/ubsan.c:492
 __btree_node_pinned fs/bcachefs/btree_cache.c:218 [inline]
 __bch2_btree_node_hash_insert+0x184d/0x1ab0 fs/bcachefs/btree_cache.c:294
 bch2_btree_node_hash_insert+0x7e/0xc0 fs/bcachefs/btree_cache.c:309
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1791 [inline]
 bch2_btree_root_read+0x599/0x750 fs/bcachefs/btree_io.c:1819
 read_btree_roots+0x2cb/0x800 fs/bcachefs/recovery.c:582
 bch2_fs_recovery+0x2356/0x37b0 fs/bcachefs/recovery.c:929
 bch2_fs_start+0x70b/0xae0 fs/bcachefs/super.c:1083
 bch2_fs_get_tree+0xd99/0x1340 fs/bcachefs/fs.c:2570
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759
 do_new_mount+0x24a/0xa40 fs/namespace.c:3884
 do_mount fs/namespace.c:4224 [inline]
 __do_sys_mount fs/namespace.c:4435 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4412
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fef3099010a
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:00007fef31843e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fef31843ef0 RCX: 00007fef3099010a
RDX: 0000200000000180 RSI: 0000200000000540 RDI: 00007fef31843eb0
RBP: 0000200000000180 R08: 00007fef31843ef0 R09: 0000000000800000
R10: 0000000000800000 R11: 0000000000000246 R12: 0000200000000540
R13: 00007fef31843eb0 R14: 0000000000005968 R15: 0000200000000300
 </TASK>
---[ end trace ]---