EXT4-fs (loop4): mount failed
EXT4-fs (loop5): get root inode failed
EXT4-fs (loop2): mount failed
EXT4-fs (loop3): mount failed
------------[ cut here ]------------
kernel BUG at fs/buffer.c:3106!
EXT4-fs (loop5): mount failed
EXT4-fs (loop0): mount failed
EXT4-fs error (device loop1): ext4_fill_super:4365: inode #2: comm syz-executor279: iget: root inode unallocated
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
EXT4-fs (loop1): get root inode failed
Modules linked in:
CPU: 0 PID: 11371 Comm: kmmpd-loop4 Not tainted 4.14.205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809e290600 task.stack: ffff8880a20f0000
RIP: 0010:submit_bh_wbc+0x573/0x6f0 fs/buffer.c:3106
RSP: 0018:ffff8880a20f7d98 EFLAGS: 00010297
EXT4-fs (loop1): mount failed
RAX: ffff88809e290600 RBX: ffff88808e707e70 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000003800 RDI: 0000000000000001
RBP: ffff888099030480 R08: 0000000000000000 R09: 000000000005041c
R10: ffff88809e290e88 R11: ffff88809e290600 R12: 0000000000003800
R13: 0000000000000000 R14: 0000000000000001 R15: 00000000ffff9c41
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000043f480 CR3: 00000000b34c8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 write_mmp_block+0x1b4/0x2d0 fs/ext4/mmp.c:55
 kmmpd+0x655/0x990 fs/ext4/mmp.c:246
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 02 c2 ff f0 80 63 01 f7 e9 66 fb ff ff 48 8d 43 10 4c 8d 7b 20 48 89 44 24 08 e9 55 fc ff ff e8 34 02 c2 ff 0f 0b e8 2d 02 c2 ff <0f> 0b e8 26 02 c2 ff 0f 0b e8 1f 02 c2 ff 0f 0b e8 18 02 c2 ff 
RIP: submit_bh_wbc+0x573/0x6f0 fs/buffer.c:3106 RSP: ffff8880a20f7d98
---[ end trace 6cb406b5a2f73081 ]---