Don't use emalloc() in fmt_string(); we want to be able to use it from

a plugin.

src/fmt_string.c

@@ -51,13 +51,15 @@ fmt_string(const char *var, const char *val)
     size_t val_len = strlen(val);
     char *cp, *str;
 
-    cp = str = emalloc(var_len + 1 + val_len + 1);
+    cp = str = malloc(var_len + 1 + val_len + 1);
+	if (str != NULL) {
 	memcpy(cp, var, var_len);
 	cp += var_len;
 	*cp++ = '=';
 	memcpy(cp, val, val_len);
 	cp += val_len;
 	*cp = '\0';
+    }
 
     return(str);
 }

src/parse_args.c

@@ -359,8 +359,11 @@ parse_args(int argc, char **argv, int *nargc, char ***nargv, char ***settingsp,
 	if (sudo_settings[i].value) {
 	    sudo_debug(9, "settings: %s=%s", sudo_settings[i].name,
 		sudo_settings[i].value);
-	    settings[j++] = fmt_string(sudo_settings[i].name,
+	    settings[j] = fmt_string(sudo_settings[i].name,
 		sudo_settings[i].value);
+	    if (settings[j] == NULL)
+		errorx(1, "unable to allocate memory");
+	    j++;
 	}
     }
     settings[j] = NULL;

src/sudo.c

@@ -328,6 +328,8 @@ get_user_info(struct user_details *ud)
 	errorx(1, "unknown uid %lu: who are you?", (unsigned long)ud->uid);
 
     user_info[i] = fmt_string("user", pw->pw_name);
+    if (user_info[i] == NULL)
+	errorx(1, "unable to allocate memory");
     ud->username = user_info[i] + sizeof("user=") - 1;
 
     easprintf(&user_info[++i], "uid=%lu", (unsigned long)ud->uid);
@@ -340,12 +342,16 @@ get_user_info(struct user_details *ud)
 
     if (getcwd(cwd, sizeof(cwd)) != NULL) {
 	user_info[++i] = fmt_string("cwd", cwd);
+	if (user_info[i] == NULL)
+	    errorx(1, "unable to allocate memory");
 	ud->cwd = user_info[i] + sizeof("cwd=") - 1;
     }
 
     if ((cp = ttyname(STDIN_FILENO)) || (cp = ttyname(STDOUT_FILENO)) ||
 	(cp = ttyname(STDERR_FILENO))) {
 	user_info[++i] = fmt_string("tty", cp);
+	if (user_info[i] == NULL)
+	    errorx(1, "unable to allocate memory");
 	ud->tty = user_info[i] + sizeof("tty=") - 1;
     }
 
@@ -354,6 +360,8 @@ get_user_info(struct user_details *ud)
     else
 	strlcpy(host, "localhost", sizeof(host));
     user_info[++i] = fmt_string("host", host);
+    if (user_info[i] == NULL)
+	errorx(1, "unable to allocate memory");
     ud->host = user_info[i] + sizeof("host=") - 1;
 
     user_info[++i] = NULL;