ext4: fix deadlock when converting an inline directory in nojournal mode

In the Linux kernel, the following vulnerability has been resolved:

ext4: fix deadlock when converting an inline directory in nojournal mode

In no journal mode, ext4_finish_convert_inline_dir() can self-deadlock

by calling ext4_handle_dirty_dirblock() when it already has taken the

directory lock. There is a similar self-deadlock in

ext4_incvert_inline_data_nolock() for data files which we'll fix at

the same time.

A simple reproducer demonstrating the problem:

mke2fs -Fq -t ext2 -O inline_data -b 4k /dev/vdc 64

mount -t ext4 -o dirsync /dev/vdc /vdc

cd /vdc

mkdir file0

cd file0

touch file0

touch file1

attr -s BurnSpaceInEA -V abcde .

touch supercalifragilisticexpialidocious