bcachefs (loop2): sb invalid before write: Unsupported superblock version_min 0.0: (unknown version) (min 0.9: (unknown version), max 1.25: extent_flags)
  inconsistency detected - emergency read only at journal seq 10
------------[ cut here ]------------
UBSAN: shift-out-of-bounds in fs/bcachefs/bkey.c:163:16
shift exponent 4294967127 is too large for 64-bit type 'u64' (aka 'unsigned long long')
CPU: 1 UID: 0 PID: 3347 Comm: read_btree_node Not tainted 6.15.0-rc4-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0xa2/0xf0 lib/dump_stack.c:120
 ubsan_epilogue+0x5/0x30 lib/ubsan.c:231
 __ubsan_handle_shift_out_of_bounds+0x202/0x210 lib/ubsan.c:492
 get_inc_field fs/bcachefs/bkey.c:163 [inline]
 __bch2_bkey_unpack_key+0x76f/0x7c0 fs/bcachefs/bkey.c:284
 __bch2_bkey_compat+0x3dd/0x5a0 fs/bcachefs/bkey_methods.c:480
 bch2_bkey_compat fs/bcachefs/bkey_methods.h:134 [inline]
 validate_bset_keys+0x1ee/0x7c0 fs/bcachefs/btree_io.c:983
 bch2_btree_node_read_done+0xb54/0x18a0 fs/bcachefs/btree_io.c:1211
 btree_node_read_work+0x17c/0x4d0 fs/bcachefs/btree_io.c:1400
 bch2_btree_node_read+0xd62/0xe60 fs/bcachefs/btree_io.c:-1
 bch2_btree_node_fill+0x553/0x6e0 fs/bcachefs/btree_cache.c:994
 bch2_btree_node_get_noiter+0x2b0/0x330 fs/bcachefs/btree_cache.c:1261
 found_btree_node_is_readable fs/bcachefs/btree_node_scan.c:85 [inline]
 try_read_btree_node fs/bcachefs/btree_node_scan.c:220 [inline]
 read_btree_nodes_worker+0x729/0xb10 fs/bcachefs/btree_node_scan.c:269
 kthread+0x200/0x230 kernel/kthread.c:464
 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
---[ end trace ]---