------------[ cut here ]------------
kernel BUG at fs/buffer.c:2779!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5033 Comm: kmmpd-loop0 Not tainted 6.5.0-syzkaller-12883-g2a5a4326e583 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:submit_bh_wbc+0x445/0x460 fs/buffer.c:2779
Code: 48 89 de e8 dd b4 fb ff 4c 89 ef 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d e9 27 f9 15 02 e8 92 29 85 ff 0f 0b e8 8b 29 85 ff <0f> 0b e8 84 29 85 ff 0f 0b e8 7d 29 85 ff 0f 0b e8 76 29 85 ff 0f
RSP: 0018:ffffc90003a17c48 EFLAGS: 00010293
RAX: ffffffff82087a05 RBX: 0000000000000000 RCX: ffff8880204c1dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003a17d50 R08: ffffffff8208765b R09: 1ffff1100f460c1d
R10: dffffc0000000000 R11: ffffed100f460c1e R12: 1ffff1100f460c1d
R13: 0000000000003801 R14: 0000000000000000 R15: ffff88807a3060e8
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f39d3980510 CR3: 0000000077f20000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 write_mmp_block_thawed+0x3ba/0x5a0 fs/ext4/mmp.c:51
 write_mmp_block+0x13f/0x390 fs/ext4/mmp.c:67
 kmmpd+0x423/0xaa0 fs/ext4/mmp.c:178
 kthread+0x2b8/0x350 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_bh_wbc+0x445/0x460 fs/buffer.c:2779
Code: 48 89 de e8 dd b4 fb ff 4c 89 ef 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d e9 27 f9 15 02 e8 92 29 85 ff 0f 0b e8 8b 29 85 ff <0f> 0b e8 84 29 85 ff 0f 0b e8 7d 29 85 ff 0f 0b e8 76 29 85 ff 0f
RSP: 0018:ffffc90003a17c48 EFLAGS: 00010293
RAX: ffffffff82087a05 RBX: 0000000000000000 RCX: ffff8880204c1dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003a17d50 R08: ffffffff8208765b R09: 1ffff1100f460c1d
R10: dffffc0000000000 R11: ffffed100f460c1e R12: 1ffff1100f460c1d
R13: 0000000000003801 R14: 0000000000000000 R15: ffff88807a3060e8
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561fae8710b8 CR3: 0000000029ac7000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400