------------[ cut here ]------------
kernel BUG at fs/buffer.c:2714!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7720 Comm: kmmpd-loop0 Not tainted 6.1.128-syzkaller-00010-g27895588a299 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:submit_bh_wbc+0x4cd/0x4f0 fs/buffer.c:2714
Code: c3 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c bd fe ff ff 48 89 df e8 14 bc e6 ff e9 b0 fe ff ff e8 8a 1d 9f ff 0f 0b e8 83 1d 9f ff <0f> 0b e8 7c 1d 9f ff 0f 0b e8 75 1d 9f ff 0f 0b e8 6e 1d 9f ff 0f
RSP: 0018:ffffc90001d87c20 EFLAGS: 00010293

RAX: ffffffff81d6775d RBX: 0000000000000000 RCX: ffff88811d4a9440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001d87c70 R08: ffffffff81d67330 R09: ffffed10216d82e8
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff110216d82e7 R14: ffff88810b6c1738 R15: 0000000000003801
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f661a0f7000 CR3: 000000014b145000 CR4: 00000000003506b0
DR0: 1000000000000000 DR1: 0000000000000004 DR2: 000000000000002f
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 submit_bh+0x1d/0x30 fs/buffer.c:2755
 write_mmp_block_thawed+0x3a0/0x570 fs/ext4/mmp.c:51
 write_mmp_block+0x12b/0x2a0 fs/ext4/mmp.c:67
 kmmpd+0x263/0xa10 fs/ext4/mmp.c:246
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_bh_wbc+0x4cd/0x4f0 fs/buffer.c:2714
Code: c3 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c bd fe ff ff 48 89 df e8 14 bc e6 ff e9 b0 fe ff ff e8 8a 1d 9f ff 0f 0b e8 83 1d 9f ff <0f> 0b e8 7c 1d 9f ff 0f 0b e8 75 1d 9f ff 0f 0b e8 6e 1d 9f ff 0f
RSP: 0018:ffffc90001d87c20 EFLAGS: 00010293
RAX: ffffffff81d6775d RBX: 0000000000000000 RCX: ffff88811d4a9440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001d87c70 R08: ffffffff81d67330 R09: ffffed10216d82e8
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff110216d82e7 R14: ffff88810b6c1738 R15: 0000000000003801
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2cdfd0 CR3: 000000000700f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400