[LU-8014] potential memory dereference in kuc_ispayload()

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.9.0
• Labels: patch
• Severity: 3
• Assignee: Frank Zago (Inactive)
• Reporter: Frank Zago (Inactive)

Description

That function takes a pointer, decrements it and dereference the new address. However we have no idea if the page it's in is readable or even exists. Such dereference would cause an oops.