[LU-7943] Suspicious dereference of pointer before NULL check

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.12.0
• Affects Version/s: Lustre 2.9.0
• Labels: kw
• Severity: 3
• Assignee: Arshad Hussain
• Reporter: Dmitry Eremin (Inactive)

Description

Suspicious dereference of pointer 'sname' before NULL check at line 786

• An event which alters the program's state, leading to the defect
  mdd_dir.c:782: 'sname' is dereferenced.
• An event which alters the program's state, leading to the defect
  mdd_dir.c:786: 'sname' is checked for NULL.

776		static void mdd_changelog_rec_ext_rename(struct changelog_rec *rec,
777							 const struct lu_fid *sfid,
778							 const struct lu_fid *spfid,
779							 const struct lu_name *sname)
780		{
781			struct changelog_ext_rename	*rnm = changelog_rec_rename(rec);
782			size_t				 extsize = sname->ln_namelen + 1;
783		 
784			LASSERT(sfid != NULL);
785			LASSERT(spfid != NULL);
786			LASSERT(sname != NULL);