------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_journal_iter.c:83!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 10508 Comm: syz.2.688 Not tainted 6.14.0-rc3-syzkaller-00295-g27102b38b8ca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:bch2_journal_keys_peek_max+0x164f/0x1660 fs/bcachefs/btree_journal_iter.c:83
Code: 10 48 8d 5c 08 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 4f 87 d9 fd 4c 8b 33 e9 d7 fe ff ff e8 12 d4 74 fd 90 <0f> 0b e8 8a 93 b3 07 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc90003576620 EFLAGS: 00010283
RAX: ffffffff844ce98e RBX: 000000000000003a RCX: 0000000000080000
RDX: ffffc90017a42000 RSI: 000000000004e0c7 RDI: 000000000004e0c8
RBP: ffffc900035767e0 R08: ffffffff844cd485 R09: 0000000000000000
R10: 00000001ffffffff R11: 2000000000000000 R12: dffffc0000000000
R13: ffff888069f80000 R14: ffffffffffffffff R15: ffffc90003577018
FS:  00007f041425a6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0414217f98 CR3: 0000000072cde000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_journal_peek fs/bcachefs/btree_iter.c:2137 [inline]
 btree_trans_peek_journal+0x342/0x5a0 fs/bcachefs/btree_iter.c:2166
 __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2303 [inline]
 bch2_btree_iter_peek_max+0x1502/0x6320 fs/bcachefs/btree_iter.c:2373
 bch2_btree_iter_peek_slot+0xe0a/0x27c0 fs/bcachefs/btree_iter.c:2838
 bch2_btree_iter_peek_prev_min+0x1f3/0x6390 fs/bcachefs/btree_iter.c:2612
 __bch2_resume_logged_op_finsert+0xd5f/0x36b0 fs/bcachefs/io_misc.c:431
 bch2_fcollapse_finsert+0x286/0x3b0 fs/bcachefs/io_misc.c:535
 bchfs_fcollapse_finsert+0x3a8/0x630 fs/bcachefs/fs-io.c:594
 bch2_fallocate_dispatch+0x3c9/0x540
 vfs_fallocate+0x623/0x7a0 fs/open.c:338
 ksys_fallocate fs/open.c:362 [inline]
 __do_sys_fallocate fs/open.c:367 [inline]
 __se_sys_fallocate fs/open.c:365 [inline]
 __x64_sys_fallocate+0xbc/0x110 fs/open.c:365
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f041338d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f041425a038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f04135a5fa0 RCX: 00007f041338d169
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000007
RBP: 00007f041340e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000008000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f04135a5fa0 R15: 00007fff8908c608
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_journal_keys_peek_max+0x164f/0x1660 fs/bcachefs/btree_journal_iter.c:83
Code: 10 48 8d 5c 08 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 4f 87 d9 fd 4c 8b 33 e9 d7 fe ff ff e8 12 d4 74 fd 90 <0f> 0b e8 8a 93 b3 07 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc90003576620 EFLAGS: 00010283
RAX: ffffffff844ce98e RBX: 000000000000003a RCX: 0000000000080000
RDX: ffffc90017a42000 RSI: 000000000004e0c7 RDI: 000000000004e0c8
RBP: ffffc900035767e0 R08: ffffffff844cd485 R09: 0000000000000000
R10: 00000001ffffffff R11: 2000000000000000 R12: dffffc0000000000
R13: ffff888069f80000 R14: ffffffffffffffff R15: ffffc90003577018
FS:  00007f041425a6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f04096fa000 CR3: 0000000072cde000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400