fs: ocfs2: check status values

Test return values before overwriting.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Artem Chernyshev <[email protected]>
Reviewed-by: Joseph Qi <[email protected]>
Cc: Mark Fasheh <[email protected]>
Cc: Joel Becker <[email protected]>
Cc: Junxiao Bi <[email protected]>
Cc: Changwei Ge <[email protected]>
Cc: Gang He <[email protected]>
Cc: Jun Piao <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: dTenebrae

fs/ocfs2/namei.c

@@ -1597,6 +1597,10 @@ static int ocfs2_rename(struct mnt_idmap *idmap,
 	if (update_dot_dot) {
 		status = ocfs2_update_entry(old_inode, handle,
 					    &old_inode_dot_dot_res, new_dir);
+		if (status < 0) {
+			mlog_errno(status);
+			goto bail;
+		}
 		drop_nlink(old_dir);
 		if (new_inode) {
 			drop_nlink(new_inode);
@@ -1636,6 +1640,10 @@ static int ocfs2_rename(struct mnt_idmap *idmap,
 							 INODE_CACHE(old_dir),
 							 old_dir_bh,
 							 OCFS2_JOURNAL_ACCESS_WRITE);
+			if (status < 0) {
+				mlog_errno(status);
+				goto bail;
+			}
 			fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
 			ocfs2_set_links_count(fe, old_dir->i_nlink);
 			ocfs2_journal_dirty(handle, old_dir_bh);

fs/ocfs2/quota_local.c

@@ -1240,6 +1240,10 @@ int ocfs2_create_local_dquot(struct dquot *dquot)
 				     &od->dq_local_phys_blk,
 				     &pcount,
 				     NULL);
+	if (status < 0) {
+		mlog_errno(status);
+		goto out;
+	}
 
 	/* Initialize dquot structure on disk */
 	status = ocfs2_local_write_dquot(dquot);