io_time[WRITE]    512
  fragmentation     134217728
  bp_start          8
  incorrectly set at freespace:0:34:0 (free 0, genbits 0 should be 0), fixing
------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_locking.h:306!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 6212 Comm: kworker/u8:10 Not tainted 6.12.0-next-20241128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: btree_node_rewrite async_btree_node_rewrite_work
RIP: 0010:__btree_node_lock_write fs/bcachefs/btree_locking.h:306 [inline]
RIP: 0010:bch2_btree_node_lock_write+0x400/0x430 fs/bcachefs/btree_locking.h:327
Code: 06 be 03 00 00 00 48 c7 c7 00 cf f3 8e 48 89 da e8 65 e8 d4 00 49 bf 00 00 00 00 00 fc ff df e9 f2 fd ff ff e8 f1 f0 6d fd 90 <0f> 0b e8 e9 f0 6d fd 90 0f 0b e8 e1 f0 6d fd 90 0f 0b 48 8b 4c 24
RSP: 0018:ffffc900050af780 EFLAGS: 00010293
RAX: ffffffff8431840f RBX: ffff888035a5c288 RCX: ffff88802b705a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: ffff888035a5c000 R08: ffffffff84318065 R09: 1ffffffff20333d6
R10: dffffc0000000000 R11: fffffbfff20333d7 R12: ffff888035a5c268
R13: 1ffff11005190013 R14: ffff888028c80000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f24cc599d58 CR3: 000000007cffa000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_set_root+0x2a2/0xd20 fs/bcachefs/btree_update_interior.c:1323
 bch2_btree_node_rewrite+0x69d/0x1270 fs/bcachefs/btree_update_interior.c:2177
 async_btree_node_rewrite_trans fs/bcachefs/btree_update_interior.c:2241 [inline]
 async_btree_node_rewrite_work+0x31e/0xdf0 fs/bcachefs/btree_update_interior.c:2254
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__btree_node_lock_write fs/bcachefs/btree_locking.h:306 [inline]
RIP: 0010:bch2_btree_node_lock_write+0x400/0x430 fs/bcachefs/btree_locking.h:327
Code: 06 be 03 00 00 00 48 c7 c7 00 cf f3 8e 48 89 da e8 65 e8 d4 00 49 bf 00 00 00 00 00 fc ff df e9 f2 fd ff ff e8 f1 f0 6d fd 90 <0f> 0b e8 e9 f0 6d fd 90 0f 0b e8 e1 f0 6d fd 90 0f 0b 48 8b 4c 24
RSP: 0018:ffffc900050af780 EFLAGS: 00010293
RAX: ffffffff8431840f RBX: ffff888035a5c288 RCX: ffff88802b705a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: ffff888035a5c000 R08: ffffffff84318065 R09: 1ffffffff20333d6
R10: dffffc0000000000 R11: fffffbfff20333d7 R12: ffff888035a5c268
R13: 1ffff11005190013 R14: ffff888028c80000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1518a27440 CR3: 00000000339e6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400