[LU-8733] gnilnd: Remove read capability of cksum_test proc file

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.9.0
• Severity: 3
• Assignee: Chris Horn
• Reporter: Chris Horn

Description

When the old create proc interface was deprecated cksum_test was updated
to use the new file operations table. Inadvertantly read was left as a capability
without actually defining a function that the file would use when someone tried
to read the file. This causes a kernel crash when cksum_test is read, though it
can only be done by the root user.