Clean up memory leaks

src/ioc/db/dbJLink.c

@@ -385,6 +385,7 @@ long dbJLinkParse(const char *json, size_t jlen, short dbfType,
         err = yajl_get_error(yh, 1, (const unsigned char *) json, (unsigned) jlen);
         errlogPrintf("dbJLinkInit: %s\n", err);
         yajl_free_error(yh, err);
+        dbJLinkFree(parser->pjlink);
         /* fall through */
     default:
         status = S_db_badField;

src/ioc/db/dbLink.c

@@ -177,6 +177,8 @@ void dbRemoveLink(struct dbLocker *locker, struct link *plink)
             plset->removeLink(locker, plink);
         plink->lset = NULL;
     }
+    if (plink->type == JSON_LINK)
+        plink->value.json.jlink = NULL;
 }
 
 int dbLinkIsDefined(const struct link *plink)

src/ioc/dbStatic/dbStaticLib.c

@@ -2235,7 +2235,6 @@ long dbInitRecordLinks(dbRecordType *rtyp, struct dbCommon *prec)
     return 0;
 }
 
-static
 void dbFreeLinkInfo(dbLinkInfo *pinfo)
 {
     if (pinfo->ltype == JSON_LINK) {
@@ -2282,12 +2281,11 @@ long dbParseLink(const char *str, short ftype, dbLinkInfo *pinfo)
 
     /* Check for braces => JSON */
     if (*str == '{' && str[len-1] == '}') {
-        long status = dbJLinkParse(str, len, ftype, &pinfo->jlink);
+        if (dbJLinkParse(str, len, ftype, &pinfo->jlink))
+            goto fail;
 
-        if (!status)
-            pinfo->ltype = JSON_LINK;
-
-        return status;
+        pinfo->ltype = JSON_LINK;
+        return 0;
     }
 
     /* Check for other HW link types */

src/ioc/dbStatic/dbStaticPvt.h

@@ -74,6 +74,8 @@ long dbCanSetLink(DBLINK *plink, dbLinkInfo *pinfo, devSup *devsup);
  * Unconditionally takes ownership of pinfo->target
  */
 long dbSetLink(DBLINK *plink, dbLinkInfo *pinfo, devSup *dset);
+/* Free dbLinkInfo storage */
+epicsShareFunc void dbFreeLinkInfo(dbLinkInfo *pinfo);
 
 /* The following is for path */
 typedef struct dbPathNode {