------------[ cut here ]------------
kernel BUG at fs/buffer.c:3027!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 471 Comm: kmmpd-loop0 Not tainted 5.4.249-syzkaller-04706-geffd75159534 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:submit_bh_wbc+0x831/0x850 fs/buffer.c:3027
Code: 10 80 e1 07 80 c1 03 38 c1 0f 8c 14 fe ff ff 48 8b 7c 24 10 e8 50 a4 ea ff e9 05 fe ff ff e8 86 e4 ba ff 0f 0b e8 7f e4 ba ff <0f> 0b e8 78 e4 ba ff 0f 0b e8 71 e4 ba ff 0f 0b e8 6a e4 ba ff 0f
RSP: 0018:ffff8881ec31fbf0 EFLAGS: 00010293
RAX: ffffffff81a95191 RBX: 0000000000000000 RCX: ffff8881edf0ee40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000003800 R08: ffffffff81a94a04 R09: ffffed103b2a7712
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881d953b888 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2c05a90d58 CR3: 00000001ed324000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bh+0x21/0x30 fs/buffer.c:3076
 write_mmp_block+0x3ff/0x5b0 fs/ext4/mmp.c:55
 kmmpd+0x7de/0xa10 fs/ext4/mmp.c:246
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
---[ end trace 279638a2db29f406 ]---
RIP: 0010:submit_bh_wbc+0x831/0x850 fs/buffer.c:3027
Code: 10 80 e1 07 80 c1 03 38 c1 0f 8c 14 fe ff ff 48 8b 7c 24 10 e8 50 a4 ea ff e9 05 fe ff ff e8 86 e4 ba ff 0f 0b e8 7f e4 ba ff <0f> 0b e8 78 e4 ba ff 0f 0b e8 71 e4 ba ff 0f 0b e8 6a e4 ba ff 0f
RSP: 0018:ffff8881ec31fbf0 EFLAGS: 00010293
RAX: ffffffff81a95191 RBX: 0000000000000000 RCX: ffff8881edf0ee40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000003800 R08: ffffffff81a94a04 R09: ffffed103b2a7712
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881d953b888 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2c05a90d58 CR3: 00000001ed324000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400