bcachefs (loop0): pointer to missing indirect extent in (disconnected) offset 0: -4096
  u64s 7 type reflink_p 4104:8:U32_MAX len 8 ver 0: idx 0 front_pad 0 back_pad 0
  missing reflink btree range 0-8, fixing
------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_update.c:410!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 4708 Comm: kworker/u5:1 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
Workqueue: bcachefs bch2_write_point_do_index_updates
RIP: 0010:bch2_trans_update_by_path+0x1f2b/0x1f30 fs/bcachefs/btree_update.c:410
Code: fd 90 0f 0b e8 86 bf 8f fd 90 0f 0b e8 7e bf 8f fd 90 0f 0b e8 76 bf 8f fd 90 0f 0b e8 6e bf 8f fd 90 0f 0b e8 66 bf 8f fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
RSP: 0018:ffffc90002d3e208 EFLAGS: 00010293
RAX: ffffffff842ffbda RBX: 0000000000004000 RCX: ffff88801f784880
RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000000000000
RBP: ffff88805627e4d8 R08: ffff88801f784880 R09: 0000000000000002
R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff1100ac4fc9b R14: dffffc0000000000 R15: ffff88805627e4d8
FS:  0000000000000000(0000) GS:ffff88808d20d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e3e357d168 CR3: 000000004232d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 bch2_trans_update_ip+0x9a6/0x1db0 fs/bcachefs/btree_update.c:531
 bch2_trans_update fs/bcachefs/btree_update.h:123 [inline]
 bch2_btree_insert_nonextent fs/bcachefs/btree_update.c:625 [inline]
 bch2_trans_update_extent_overwrite+0x1972/0x2d10 fs/bcachefs/btree_update.c:243
 bch2_trans_update_extent fs/bcachefs/btree_update.c:299 [inline]
 bch2_trans_update_ip+0x1358/0x1db0 fs/bcachefs/btree_update.c:503
 bch2_trans_update fs/bcachefs/btree_update.h:123 [inline]
 bch2_btree_insert_trans+0x1cd/0x330 fs/bcachefs/btree_update.c:637
 bch2_indirect_extent_missing_error+0xd2d/0x11b0 fs/bcachefs/reflink.c:239
 bch2_lookup_indirect_extent+0x38d/0x5c0 fs/bcachefs/reflink.c:279
 trans_trigger_reflink_p_segment fs/bcachefs/reflink.c:308 [inline]
 __trigger_reflink_p+0x395/0x19c0 fs/bcachefs/reflink.c:419
 bch2_trigger_reflink_p+0x1ea/0x3a0 fs/bcachefs/reflink.c:454
 run_one_trans_trigger fs/bcachefs/btree_trans_commit.c:-1 [inline]
 bch2_trans_commit_run_triggers fs/bcachefs/btree_trans_commit.c:554 [inline]
 __bch2_trans_commit+0xa81/0x8870 fs/bcachefs/btree_trans_commit.c:1023
 bch2_trans_commit fs/bcachefs/btree_update.h:241 [inline]
 bch2_extent_update+0x33e/0x900 fs/bcachefs/io_write.c:359
 bch2_write_index_default fs/bcachefs/io_write.c:406 [inline]
 __bch2_write_index+0xbb8/0x1930 fs/bcachefs/io_write.c:606
 bch2_write_point_do_index_updates+0x43f/0x570 fs/bcachefs/io_write.c:718
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_trans_update_by_path+0x1f2b/0x1f30 fs/bcachefs/btree_update.c:410
Code: fd 90 0f 0b e8 86 bf 8f fd 90 0f 0b e8 7e bf 8f fd 90 0f 0b e8 76 bf 8f fd 90 0f 0b e8 6e bf 8f fd 90 0f 0b e8 66 bf 8f fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
RSP: 0018:ffffc90002d3e208 EFLAGS: 00010293
RAX: ffffffff842ffbda RBX: 0000000000004000 RCX: ffff88801f784880
RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000000000000
RBP: ffff88805627e4d8 R08: ffff88801f784880 R09: 0000000000000002
R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff1100ac4fc9b R14: dffffc0000000000 R15: ffff88805627e4d8
FS:  0000000000000000(0000) GS:ffff88808d20d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e3e359d000 CR3: 00000000117c5000 CR4: 0000000000352ef0