[LU-16509] quash memcpy WARN_ONCE false positives

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.3
• Severity: 3
• Assignee: Shaun Tancheff
• Reporter: Shaun Tancheff

Description

Linux v6.1-rc1-4-g6f7630b1b5bc
fortify: Capture __bos() results in const temp var

[__fortify_memcpy_chk] added a WARN_ONCE for runtime detection of detected field-spanning write.

This triggers with structs that have zero sized, or flexible array members (Typically data headers with sized payloads).

Currently lustre sizes and checks these objects appropriately.