------------[ cut here ]------------
kernel BUG at fs/buffer.c:2805!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8382 Comm: kmmpd-loop0 Not tainted 6.5.0-rc3-syzkaller-00018-g0b5547c51827 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:submit_bh_wbc+0x4b3/0x5c0 fs/buffer.c:2805
Code: ff ff e8 70 43 8c ff be 08 00 00 00 48 89 df e8 43 37 e0 ff f0 80 63 01 fb e9 f3 fc ff ff e8 54 43 8c ff 0f 0b e8 4d 43 8c ff <0f> 0b e8 46 43 8c ff 0f 0b e8 3f 43 8c ff 0f 0b e8 38 43 8c ff 0f
RSP: 0018:ffffc90015bf7cf8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88803665d0e8 RCX: 0000000000000000
RDX: ffff888021cf0000 RSI: ffffffff81fa2d63 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000003801 R14: ffff88803503c000 R15: ffffffff8c60f200
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005560600168f8 CR3: 000000001a307000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 write_mmp_block_thawed+0x2dc/0x450 fs/ext4/mmp.c:51
 write_mmp_block fs/ext4/mmp.c:67 [inline]
 kmmpd+0x31b/0x1220 fs/ext4/mmp.c:178
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_bh_wbc+0x4b3/0x5c0 fs/buffer.c:2805
Code: ff ff e8 70 43 8c ff be 08 00 00 00 48 89 df e8 43 37 e0 ff f0 80 63 01 fb e9 f3 fc ff ff e8 54 43 8c ff 0f 0b e8 4d 43 8c ff <0f> 0b e8 46 43 8c ff 0f 0b e8 3f 43 8c ff 0f 0b e8 38 43 8c ff 0f
RSP: 0018:ffffc90015bf7cf8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88803665d0e8 RCX: 0000000000000000
RDX: ffff888021cf0000 RSI: ffffffff81fa2d63 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000003801 R14: ffff88803503c000 R15: ffffffff8c60f200
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005603700e7040 CR3: 000000002ca50000 CR4: 0000000000350ef0