[LU-13746] lctl llog_print segfault if no log name supplied

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0
• Affects Version/s: Lustre 2.13.0
• Labels: easy
• Environment: lustre 2.13.54: test environnement
• Assignee: Etienne Aujames
• Reporter: Etienne Aujames

Description

The following command executed on MGS returns a "Segmentation fault": lctl --device MGS llog_print

The argument "logname" is mandatory but its presence is not checked. This cause a NULL pointer dereference error.