improved malloc error handlings.

src/comp_helper.c

@@ -57,6 +57,9 @@ json_t *dump_header(const uint8_t *name, size_t namelen, const uint8_t *value,
                     size_t valuelen) {
   json_t *nv_pair = json_object();
   char *cname = malloc(namelen + 1);
+  if (cname == NULL) {
+      return NULL;
+  }
   memcpy(cname, name, namelen);
   cname[namelen] = '\0';
   json_object_set_new(nv_pair, cname, json_pack("s#", value, valuelen));

src/util.cc

@@ -737,10 +737,16 @@ char *get_exec_path(int argc, char **const argv, const char *cwd) {
 
   if (argv0[0] == '/') {
     path = static_cast<char *>(malloc(len + 1));
+    if (path == NULL) {
+        return NULL;
+    }
     memcpy(path, argv0, len + 1);
   } else {
     auto cwdlen = strlen(cwd);
     path = static_cast<char *>(malloc(len + 1 + cwdlen + 1));
+    if (path == NULL) {
+        return NULL;
+    }
     memcpy(path, cwd, cwdlen);
     path[cwdlen] = '/';
     memcpy(path + cwdlen + 1, argv0, len + 1);