CVE-2023-54311

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, ext4finishconvertinlinedir() can self-deadlock by calling ext4handledirtydirblock() when it already has taken the directory lock. There is a similar self-deadlock in ext4incvertinlinedata_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