------------[ cut here ]------------
kernel BUG at fs/buffer.c:2666!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 5386 Comm: kmmpd-loop0 Not tainted 6.1.140-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : submit_bh_wbc+0x3e0/0x454 fs/buffer.c:2666
lr : submit_bh_wbc+0x3e0/0x454 fs/buffer.c:2666
sp : ffff800020e37bb0
x29: ffff800020e37bc0 x28: ffff0000f6123008 x27: dfff800000000000
x26: 1fffe00018743ccf x25: 0000000000000000 x24: 1fffe0001bfc3e1d
x23: dfff800000000000 x22: ffff0000c3a1c000 x21: 0000000000003801
x20: ffff0000dfe1f0e8 x19: 0000000000000005 x18: 00000000660a8c6d
x17: 0000000000000005 x16: ffff8000082d076c x15: 0000000040000000
x14: 0000000000000002 x13: 1ffff00002a0e0b1 x12: 0000000000ff0100
x11: ff00800008a81418 x10: 0000000000000000 x9 : ffff800008a81418
x8 : ffff0000d07c9bc0 x7 : ffff800008db43d4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008db3f48
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 submit_bh_wbc+0x3e0/0x454 fs/buffer.c:2666
 submit_bh+0x2c/0x3c fs/buffer.c:2707
 write_mmp_block_thawed+0x300/0x4ac fs/ext4/mmp.c:51
 write_mmp_block+0x1e4/0x5f0 fs/ext4/mmp.c:67
 kmmpd+0x2c4/0x940 fs/ext4/mmp.c:178
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864
Code: 17ffffad 97e88135 d4210000 97e88133 (d4210000) 
---[ end trace 0000000000000000 ]---