------------[ cut here ]------------
kernel BUG at fs/buffer.c:3027!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1362 Comm: kmmpd-loop4 Not tainted 5.4.80-syzkaller-00759-ge37aca80313f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:submit_bh_wbc+0x764/0x790 fs/buffer.c:3027
Code: 08 80 e1 07 80 c1 03 38 c1 0f 8c c8 fe ff ff 48 8b 7c 24 08 e8 7d fb ed ff e9 b9 fe ff ff e8 23 41 bf ff 0f 0b e8 1c 41 bf ff <0f> 0b e8 15 41 bf ff 0f 0b e8 0e 41 bf ff 0f 0b e8 07 41 bf ff 0f
RSP: 0018:ffff8881ea89fc08 EFLAGS: 00010293
RAX: ffffffff81a3a3b4 RBX: 0000000000000000 RCX: ffff8881e0ac6c80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1103bf4af7a R08: ffffffff81a39ce9 R09: ffffed103bf4af7b
R10: ffffed103bf4af7b R11: 0000000000000000 R12: 0000000000000001
R13: ffff8881dfa57bd0 R14: dffffc0000000000 R15: 0000000000003800
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f81a13691c0 CR3: 00000001e28da000 CR4: 00000000001406e0
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+0x413/0x5d0 fs/ext4/mmp.c:55
 kmmpd+0x807/0xa40 fs/ext4/mmp.c:246
 kthread+0x31c/0x340 kernel/kthread.c:268
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 3c88c95294b1e397 ]---
RIP: 0010:submit_bh_wbc+0x764/0x790 fs/buffer.c:3027
Code: 08 80 e1 07 80 c1 03 38 c1 0f 8c c8 fe ff ff 48 8b 7c 24 08 e8 7d fb ed ff e9 b9 fe ff ff e8 23 41 bf ff 0f 0b e8 1c 41 bf ff <0f> 0b e8 15 41 bf ff 0f 0b e8 0e 41 bf ff 0f 0b e8 07 41 bf ff 0f
RSP: 0018:ffff8881ea89fc08 EFLAGS: 00010293
RAX: ffffffff81a3a3b4 RBX: 0000000000000000 RCX: ffff8881e0ac6c80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1103bf4af7a R08: ffffffff81a39ce9 R09: ffffed103bf4af7b
R10: ffffed103bf4af7b R11: 0000000000000000 R12: 0000000000000001
R13: ffff8881dfa57bd0 R14: dffffc0000000000 R15: 0000000000003800
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f81a13691c0 CR3: 00000001e28da000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400