The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

2.2.13 ext4: System hang when processing corrupted orphaned inode list

If the orphaned inode list is corrupted the inode may be processed repeatedly resulting in a system hang. For example, if the orphaned inode list contains a reference to the bootloader inode, ext4_iget() returns a bad inode resulting in the processing loop that can hang the system. (Bug ID 24433290)