EXT4-fs (loop3): get root inode failed
EXT4-fs (loop5): get root inode failed
EXT4-fs (loop5): mount failed
EXT4-fs (loop3): mount failed
------------[ cut here ]------------
kernel BUG at fs/buffer.c:3049!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9318 Comm: kmmpd-loop4 Not tainted 4.19.160-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:submit_bh_wbc+0x5e5/0x760 fs/buffer.c:3049
Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 e1 1e b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 d2 1e b1 ff 0f 0b e8 cb 1e b1 ff <0f> 0b e8 c4 1e b1 ff 0f 0b e8 bd 1e b1 ff 0f 0b e8 b6 1e b1 ff 0f
RSP: 0018:ffff8880abb6fd78 EFLAGS: 00010293
RAX: ffff8880a9a74480 RBX: ffff88808dfbabd0 RCX: ffffffff81b3abb1
RDX: 0000000000000000 RSI: ffffffff81b3b125 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003800
R13: 0000000000000000 R14: 0000000000000001 R15: 00000000ffffa727
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff2ac9f000 CR3: 000000009c210000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 write_mmp_block+0x1e4/0x310 fs/ext4/mmp.c:55
 kmmpd+0x71f/0xa80 fs/ext4/mmp.c:246
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Modules linked in:
EXT4-fs error (device loop0): ext4_fill_super:4448: inode #2: comm syz-executor448: iget: root inode unallocated
EXT4-fs (loop0): get root inode failed
---[ end trace 687e2cdd0d360207 ]---
EXT4-fs (loop0): mount failed
RIP: 0010:submit_bh_wbc+0x5e5/0x760 fs/buffer.c:3049
Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 e1 1e b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 d2 1e b1 ff 0f 0b e8 cb 1e b1 ff <0f> 0b e8 c4 1e b1 ff 0f 0b e8 bd 1e b1 ff 0f 0b e8 b6 1e b1 ff 0f
RSP: 0018:ffff8880abb6fd78 EFLAGS: 00010293
RAX: ffff8880a9a74480 RBX: ffff88808dfbabd0 RCX: ffffffff81b3abb1
RDX: 0000000000000000 RSI: ffffffff81b3b125 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003800
R13: 0000000000000000 R14: 0000000000000001 R15: 00000000ffffa727
FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000043f480 CR3: 00000000a0cf1000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400