[Fix] no-unknown-property: avoid crash with prop named with Object.prototype key

Fixes #2879

Author: ljharb

CHANGELOG.md

@@ -18,8 +18,10 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 * [`jsx-no-script-url`]: avoid crash with boolean `href` ([#2871][] @ljharb, @AriPerkkio)
 * [`no-typos`]: avoid crash with computed method name ([#2870][] @ljharb, @AriPerkkio)
 * [`jsx-max-depth`]: avoid crash with childless jsx child ([#2869][] @ljharb, @AriPerkkio)
+* [`no-unknown-property`]: avoid crash with prop named with Object.prototype key ([#2879][] @ljharb, @AriPerkkio)
 
-[#2871]: https://github.com/yannickcr/eslint-plugin-react/issues/2875
+[#2879]: https://github.com/yannickcr/eslint-plugin-react/issues/2879
+[#2875]: https://github.com/yannickcr/eslint-plugin-react/issues/2875
 [#2871]: https://github.com/yannickcr/eslint-plugin-react/issues/2871
 [#2870]: https://github.com/yannickcr/eslint-plugin-react/issues/2870
 [#2869]: https://github.com/yannickcr/eslint-plugin-react/issues/2869

lib/rules/no-unknown-property.js

@@ -5,6 +5,7 @@
 
 'use strict';
 
+const has = require('has');
 const docsUrl = require('../util/docsUrl');
 const versionUtil = require('../util/version');
 
@@ -198,10 +199,10 @@ function tagNameHasDot(node) {
  * @returns {String | undefined} The standard name of the attribute, or undefined if no standard name was found.
  */
 function getStandardName(name, context) {
-  if (DOM_ATTRIBUTE_NAMES[name]) {
+  if (has(DOM_ATTRIBUTE_NAMES, name)) {
     return DOM_ATTRIBUTE_NAMES[name];
   }
-  if (SVGDOM_ATTRIBUTE_NAMES[name]) {
+  if (has(SVGDOM_ATTRIBUTE_NAMES, name)) {
     return SVGDOM_ATTRIBUTE_NAMES[name];
   }
   const names = getDOMPropertyNames(context);
@@ -258,7 +259,7 @@ module.exports = {
         const tagName = getTagName(node);
 
         // 1. Some attributes are allowed on some tags only.
-        const allowedTags = ATTRIBUTE_TAGS_MAP[name];
+        const allowedTags = has(ATTRIBUTE_TAGS_MAP, name) ? ATTRIBUTE_TAGS_MAP[name] : null;
         if (tagName && allowedTags && /[^A-Z]/.test(tagName.charAt(0)) && allowedTags.indexOf(tagName) === -1) {
           context.report({
             node,

tests/lib/rules/no-unknown-property.js

@@ -46,7 +46,8 @@ ruleTester.run('no-unknown-property', rule, {
       options: [{ignore: ['class']}]
     },
     {code: '<script crossOrigin />'},
-    {code: '<audio crossOrigin />'}
+    {code: '<audio crossOrigin />'},
+    {code: '<div hasOwnProperty="should not be allowed tag" />'}
   ],
   invalid: [{
     code: '<div class="bar"></div>;',