[LU-18796] Fix Coverity issues introduced by "LU-13717 sec: filename encryption - digest support"

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.17.0
• Labels: coverity patch
• Severity: 3
• Assignee: Sebastien Buisson
• Reporter: Sebastien Buisson

Description

*** CID 457073:  Resource leaks  (RESOURCE_LEAK)
/lustre/llite/crypto.c: 571 in ll_fname_disk_to_usr()
565     			/* Without the key for long names, set the dentry name
566     			 * to the representing struct ll_digest_filename. It
567     			 * will be encoded by llcrypt for display, and will
568     			 * enable further lookup requests.
569     			 */
570     			if (!fid)
   CID 457073:  Resource leaks  (RESOURCE_LEAK)
   Variable "lltr" going out of scope leaks the storage "lltr.name" points to.
571     				return -EINVAL;
572     			digest.ldf_fid = *fid;
573     			memcpy(digest.ldf_excerpt,
574     			       LLCRYPT_EXTRACT_DIGEST(lltr.name, lltr.len),
575     			       sizeof(digest.ldf_excerpt));
576