------------[ cut here ]------------
kernel BUG at fs/buffer.c:3027!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 311 Comm: kmmpd-loop0 Not tainted 5.4.180-syzkaller-00006-gee52e8cb3015 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:submit_bh_wbc+0x76e/0x790 fs/buffer.c:3027
Code: 08 80 e1 07 80 c1 03 38 c1 0f 8c be fe ff ff 48 8b 7c 24 08 e8 83 97 ee ff e9 af fe ff ff e8 69 37 c2 ff 0f 0b e8 62 37 c2 ff <0f> 0b e8 5b 37 c2 ff 0f 0b e8 54 37 c2 ff 0f 0b e8 4d 37 c2 ff 0f
RSP: 0018:ffff8881dd377d10 EFLAGS: 00010293
RAX: ffffffff819e077e RBX: 0000000000000000 RCX: ffff8881dd0ebf00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1103cdd8a00 R08: ffffffff819e00a9 R09: ffffed103cdd8a01
R10: ffffed103cdd8a01 R11: 1ffff1103cdd8a00 R12: 0000000000000001
R13: ffff8881e6ec5000 R14: dffffc0000000000 R15: 0000000000003800
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fce51806860 CR3: 00000001dd781000 CR4: 00000000003406e0
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+0x34d/0x4f0 fs/ext4/mmp.c:55
 kmmpd+0x25f/0x9b0 fs/ext4/mmp.c:246
 kthread+0x2d8/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 8cf4d2162c2db652 ]---
RIP: 0010:submit_bh_wbc+0x76e/0x790 fs/buffer.c:3027
Code: 08 80 e1 07 80 c1 03 38 c1 0f 8c be fe ff ff 48 8b 7c 24 08 e8 83 97 ee ff e9 af fe ff ff e8 69 37 c2 ff 0f 0b e8 62 37 c2 ff <0f> 0b e8 5b 37 c2 ff 0f 0b e8 54 37 c2 ff 0f 0b e8 4d 37 c2 ff 0f
RSP: 0018:ffff8881dd377d10 EFLAGS: 00010293
RAX: ffffffff819e077e RBX: 0000000000000000 RCX: ffff8881dd0ebf00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1103cdd8a00 R08: ffffffff819e00a9 R09: ffffed103cdd8a01
R10: ffffed103cdd8a01 R11: 1ffff1103cdd8a00 R12: 0000000000000001
R13: ffff8881e6ec5000 R14: dffffc0000000000 R15: 0000000000003800
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fce51806860 CR3: 00000001dd781000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400