------------[ cut here ]------------
kernel BUG at fs/buffer.c:2666!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6626 Comm: kmmpd-loop0 Not tainted 6.1.109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:submit_bh_wbc+0x4c0/0x4e0 fs/buffer.c:2666
Code: 02 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c be fe ff ff 48 89 ef e8 41 5f e0 ff e9 b1 fe ff ff e8 e7 de 88 ff 0f 0b e8 e0 de 88 ff <0f> 0b e8 d9 de 88 ff 0f 0b e8 d2 de 88 ff 0f 0b e8 cb de 88 ff 0f
RSP: 0000:ffffc900046a7c40 EFLAGS: 00010293
RAX: ffffffff8201cf90 RBX: 0000000000000000 RCX: ffff88805a441dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900046a7d50 R08: ffffffff8201cb6d R09: ffffed100e258d5d
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100e258d5c
R13: ffff8880712c6ae0 R14: 0000000000000000 R15: 0000000000003801
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31020000 CR3: 000000000d08e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 write_mmp_block_thawed+0x3b6/0x5a0 fs/ext4/mmp.c:51
 write_mmp_block+0x13f/0x390 fs/ext4/mmp.c:67
 kmmpd+0x40c/0xa70 fs/ext4/mmp.c:178
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_bh_wbc+0x4c0/0x4e0 fs/buffer.c:2666
Code: 02 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c be fe ff ff 48 89 ef e8 41 5f e0 ff e9 b1 fe ff ff e8 e7 de 88 ff 0f 0b e8 e0 de 88 ff <0f> 0b e8 d9 de 88 ff 0f 0b e8 d2 de 88 ff 0f 0b e8 cb de 88 ff 0f
RSP: 0000:ffffc900046a7c40 EFLAGS: 00010293
RAX: ffffffff8201cf90 RBX: 0000000000000000 RCX: ffff88805a441dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900046a7d50 R08: ffffffff8201cb6d R09: ffffed100e258d5d
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100e258d5c
R13: ffff8880712c6ae0 R14: 0000000000000000 R15: 0000000000003801
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f470fe09440 CR3: 0000000057b54000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400