------------[ cut here ]------------
kernel BUG at fs/buffer.c:3027!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 809 Comm: kmmpd-loop4 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:submit_bh_wbc+0x8bd/0x8e0 fs/buffer.c:3027
Code: 4d a8 80 e1 07 80 c1 03 38 c1 0f 8c 0e fe ff ff 48 8b 7d a8 e8 84 fd eb ff e9 00 fe ff ff e8 6a 03 be ff 0f 0b e8 63 03 be ff <0f> 0b e8 5c 03 be ff 0f 0b e8 55 03 be ff 0f 0b e8 4e 03 be ff 0f
RSP: 0018:ffff8881e8437c60 EFLAGS: 00010293
RAX: ffffffff81a17b7d RBX: ffff8881ed303b28 RCX: ffff8881e96c2f40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881e8437d08 R08: dffffc0000000000 R09: ffffed103da60766
R10: ffffed103da60766 R11: 1ffff1103da60765 R12: 0000000000000000
R13: 0000000000003800 R14: 0000000000000000 R15: 1ffff1103da60765
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005609f69ef038 CR3: 00000001ecc9e000 CR4: 00000000003426b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bh+0x2a/0x40 fs/buffer.c:3076
 write_mmp_block+0x379/0x4e0 fs/ext4/mmp.c:55
 kmmpd+0x276/0x9a0 fs/ext4/mmp.c:246
 kthread+0x31e/0x3a0 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
---[ end trace b16425d3e2b193fb ]---
RIP: 0010:submit_bh_wbc+0x8bd/0x8e0 fs/buffer.c:3027
Code: 4d a8 80 e1 07 80 c1 03 38 c1 0f 8c 0e fe ff ff 48 8b 7d a8 e8 84 fd eb ff e9 00 fe ff ff e8 6a 03 be ff 0f 0b e8 63 03 be ff <0f> 0b e8 5c 03 be ff 0f 0b e8 55 03 be ff 0f 0b e8 4e 03 be ff 0f
RSP: 0018:ffff8881e8437c60 EFLAGS: 00010293
RAX: ffffffff81a17b7d RBX: ffff8881ed303b28 RCX: ffff8881e96c2f40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881e8437d08 R08: dffffc0000000000 R09: ffffed103da60766
R10: ffffed103da60766 R11: 1ffff1103da60765 R12: 0000000000000000
R13: 0000000000003800 R14: 0000000000000000 R15: 1ffff1103da60765
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f753169e178 CR3: 00000001e88a7000 CR4: 00000000003426b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400