[LU-12685] ll_statahead_threda has incorrect error handling code

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0
• Severity: 3
• Assignee: WC Triage
• Reporter: Neil Brown

Description

Commit ae828cd3b092 ("LU-4684 llite: add lock for dir layout data") for

https://review.whamcloud.com/#/c/32946/

changed how op_data was allocated, with consequence that failure is reported as NULL rarther than ERR_PTR(-ENOMEM).  The error handling code was not updated to match.

So a memory allocation failure will cause a NULL pointer dereference.