syzbot

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kernel BUG at fs/bcachefs/btree_iter.c:1816!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 4664 Comm: kworker/u5:1 Not tainted 6.13.0-rc1-syzkaller-00002-gcdd30ebb1b9f #0
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_btree_path_peek_slot+0xf50/0xf90 fs/bcachefs/btree_iter.c:1816
Code: f7 ff ff 48 89 34 24 be 08 00 00 00 44 89 44 24 08 e8 84 25 e4 fd 48 8b 34 24 44 8b 44 24 08 e9 50 f7 ff ff e8 51 3c 79 fd 90 <0f> 0b e8 49 3c 79 fd 90 0f 0b e8 f1 16 aa 07 e8 3c 3c 79 fd 90 0f
RSP: 0018:ffffc9000d6bcde0 EFLAGS: 00010293
RAX: ffffffff842635cf RBX: 0000000000002164 RCX: ffff88801eef2440
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffffc9000d6bcef0 R08: ffffffff842627b0 R09: 0000000000000000
R10: ffffc9000d6bd040 R11: fffff52001ad7a0a R12: dffffc0000000000
R13: 1ffff1100ad643ae R14: ffff888056b21d50 R15: 1ffff1100ad643ad
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556d95f5f8 CR3: 000000000e736000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_iter_peek_slot+0xa2f/0x2550 fs/bcachefs/btree_iter.c:2658
 __bch2_bkey_get_iter fs/bcachefs/btree_iter.h:575 [inline]
 bch2_bkey_get_iter fs/bcachefs/btree_iter.h:589 [inline]
 try_alloc_bucket fs/bcachefs/alloc_foreground.c:305 [inline]
 bch2_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:525 [inline]
 bch2_bucket_alloc_trans+0x1997/0x3a50 fs/bcachefs/alloc_foreground.c:648
 bch2_bucket_alloc_set_trans+0x517/0xd30 fs/bcachefs/alloc_foreground.c:808
 __open_bucket_add_buckets+0x13d0/0x1ec0 fs/bcachefs/alloc_foreground.c:1057
 open_bucket_add_buckets+0x33a/0x410 fs/bcachefs/alloc_foreground.c:1101
 bch2_alloc_sectors_start_trans+0xce9/0x2030
 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:339 [inline]
 bch2_btree_reserve_get+0x612/0x1890 fs/bcachefs/btree_update_interior.c:549
 bch2_btree_update_start+0xe56/0x14e0 fs/bcachefs/btree_update_interior.c:1247
 bch2_btree_split_leaf+0x123/0x840 fs/bcachefs/btree_update_interior.c:1856
 bch2_trans_commit_error+0x212/0x1380 fs/bcachefs/btree_trans_commit.c:942
 __bch2_trans_commit+0x7ead/0x93c0 fs/bcachefs/btree_trans_commit.c:1140
 bch2_trans_commit fs/bcachefs/btree_update.h:184 [inline]
 __bch2_data_update_index_update+0x56bb/0x77f0 fs/bcachefs/data_update.c:368
 bch2_data_update_index_update+0x63/0x90 fs/bcachefs/data_update.c:414
 __bch2_write_index+0x16d1/0x2140 fs/bcachefs/io_write.c:527
 bch2_write_point_do_index_updates+0x32e/0x690 fs/bcachefs/io_write.c:635
 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:bch2_btree_path_peek_slot+0xf50/0xf90 fs/bcachefs/btree_iter.c:1816
Code: f7 ff ff 48 89 34 24 be 08 00 00 00 44 89 44 24 08 e8 84 25 e4 fd 48 8b 34 24 44 8b 44 24 08 e9 50 f7 ff ff e8 51 3c 79 fd 90 <0f> 0b e8 49 3c 79 fd 90 0f 0b e8 f1 16 aa 07 e8 3c 3c 79 fd 90 0f
RSP: 0018:ffffc9000d6bcde0 EFLAGS: 00010293
RAX: ffffffff842635cf RBX: 0000000000002164 RCX: ffff88801eef2440
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffffc9000d6bcef0 R08: ffffffff842627b0 R09: 0000000000000000
R10: ffffc9000d6bd040 R11: fffff52001ad7a0a R12: dffffc0000000000
R13: 1ffff1100ad643ae R14: ffff888056b21d50 R15: 1ffff1100ad643ad
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556d95f5f8 CR3: 000000001181e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400