diff --git a/.github/SECURITY.md b/.github/SECURITY.md
new file mode 100644
index 0000000000..60990950bf
--- /dev/null
+++ b/.github/SECURITY.md
@@ -0,0 +1,10 @@
+Security Policy
+===============
+
+If you found any issues that might have security implications,
+please send a report to security[at]symfony.com
+DO NOT PUBLISH SECURITY REPORTS PUBLICLY.
+
+The full [Security Policy][1] is described in the official documentation.
+
+  [1]: https://symfony.com/security
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Controller/ProfilerController.php b/src/Symfony/Bundle/WebProfilerBundle/Controller/ProfilerController.php
index 69f8ffe777..410f202871 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Controller/ProfilerController.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Controller/ProfilerController.php
@@ -138,7 +138,7 @@ class ProfilerController
 
         $url = null;
         try {
-            $url = $this->generator->generate('_profiler', ['token' => $token]);
+            $url = $this->generator->generate('_profiler', ['token' => $token], UrlGeneratorInterface::ABSOLUTE_URL);
         } catch (\Exception $e) {
             // the profiler is not enabled
         }
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/toolbar_item.html.twig b/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/toolbar_item.html.twig
index 69872418cf..d81e877977 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/toolbar_item.html.twig
+++ b/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Profiler/toolbar_item.html.twig
@@ -1,5 +1,5 @@
 <div class="sf-toolbar-block sf-toolbar-block-{{ name }} sf-toolbar-status-{{ status|default('normal') }} {{ additional_classes|default('') }}" {{ block_attrs|default('')|raw }}>
-    {% if link is not defined or link %}<a href="{{ path('_profiler', { token: token, panel: name }) }}">{% endif %}
+    {% if link is not defined or link %}<a href="{{ url('_profiler', { token: token, panel: name }) }}">{% endif %}
         <div class="sf-toolbar-icon">{{ icon|default('') }}</div>
     {% if link|default(false) %}</a>{% endif %}
         <div class="sf-toolbar-info">{{ text|default('') }}</div>
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ServiceLocatorTagPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ServiceLocatorTagPass.php
index 2030d3774c..a41f6905cf 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ServiceLocatorTagPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ServiceLocatorTagPass.php
@@ -108,7 +108,11 @@ final class ServiceLocatorTagPass extends AbstractRecursivePass
             ->setPublic(false)
             ->addTag('container.service_locator');
 
-        if (!$container->has($id = '.service_locator.'.ContainerBuilder::hash($locator))) {
+        if (null !== $callerId && $container->hasDefinition($callerId)) {
+            $locator->setBindings($container->getDefinition($callerId)->getBindings());
+        }
+
+        if (!$container->hasDefinition($id = '.service_locator.'.ContainerBuilder::hash($locator))) {
             $container->setDefinition($id, $locator);
         }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ServiceLocatorTagPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ServiceLocatorTagPassTest.php
index d7e5586e0a..27ee7db533 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ServiceLocatorTagPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ServiceLocatorTagPassTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\Argument\BoundArgument;
 use Symfony\Component\DependencyInjection\Compiler\ServiceLocatorTagPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
@@ -128,4 +129,19 @@ class ServiceLocatorTagPassTest extends TestCase
 
         $this->assertSame(TestDefinition1::class, \get_class($locator('bar')));
     }
+
+    public function testBindingsAreCopied()
+    {
+        $container = new ContainerBuilder();
+
+        $container->register('foo')
+            ->setBindings(['foo' => 'foo']);
+
+        $locator = ServiceLocatorTagPass::register($container, ['foo' => new Reference('foo')], 'foo');
+        $locator = $container->getDefinition($locator);
+        $locator = $container->getDefinition($locator->getFactory()[0]);
+
+        $this->assertSame(['foo'], array_keys($locator->getBindings()));
+        $this->assertInstanceOf(BoundArgument::class, $locator->getBindings()['foo']);
+    }
 }
diff --git a/src/Symfony/Component/Finder/Iterator/SortableIterator.php b/src/Symfony/Component/Finder/Iterator/SortableIterator.php
index f95341f355..eda093fa2c 100644
--- a/src/Symfony/Component/Finder/Iterator/SortableIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/SortableIterator.php
@@ -42,7 +42,7 @@ class SortableIterator implements \IteratorAggregate
 
         if (self::SORT_BY_NAME === $sort) {
             $this->sort = function ($a, $b) use ($order) {
-                return $order * strcmp($a->getRealpath() ?: $a->getPathname(), $b->getRealpath() ?: $b->getPathname());
+                return $order * strcmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
             };
         } elseif (self::SORT_BY_NAME_NATURAL === $sort) {
             $this->sort = function ($a, $b) use ($order) {
@@ -56,7 +56,7 @@ class SortableIterator implements \IteratorAggregate
                     return $order;
                 }
 
-                return $order * strcmp($a->getRealpath() ?: $a->getPathname(), $b->getRealpath() ?: $b->getPathname());
+                return $order * strcmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
             };
         } elseif (self::SORT_BY_ACCESSED_TIME === $sort) {
             $this->sort = function ($a, $b) use ($order) {
diff --git a/src/Symfony/Component/HttpKernel/Tests/Log/LoggerTest.php b/src/Symfony/Component/HttpKernel/Tests/Log/LoggerTest.php
index 7354000b16..17865203f2 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Log/LoggerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Log/LoggerTest.php
@@ -34,7 +34,7 @@ class LoggerTest extends TestCase
 
     protected function setUp()
     {
-        $this->tmpFile = sys_get_temp_dir().\DIRECTORY_SEPARATOR.'log';
+        $this->tmpFile = tempnam(sys_get_temp_dir(), 'log');
         $this->logger = new Logger(LogLevel::DEBUG, $this->tmpFile);
     }
 
diff --git a/src/Symfony/Component/Ldap/Exception/ConnectionException.php b/src/Symfony/Component/Ldap/Exception/ConnectionException.php
index cded4cf2a3..7fa8e89f6f 100644
--- a/src/Symfony/Component/Ldap/Exception/ConnectionException.php
+++ b/src/Symfony/Component/Ldap/Exception/ConnectionException.php
@@ -12,7 +12,7 @@
 namespace Symfony\Component\Ldap\Exception;
 
 /**
- * ConnectionException is throw if binding to ldap can not be established.
+ * ConnectionException is thrown if binding to ldap can not be established.
  *
  * @author Grégoire Pineau <lyrixx@lyrixx.info>
  */
diff --git a/src/Symfony/Component/Ldap/Exception/DriverNotFoundException.php b/src/Symfony/Component/Ldap/Exception/DriverNotFoundException.php
index 40258435bb..382cdf5ca6 100644
--- a/src/Symfony/Component/Ldap/Exception/DriverNotFoundException.php
+++ b/src/Symfony/Component/Ldap/Exception/DriverNotFoundException.php
@@ -12,7 +12,7 @@
 namespace Symfony\Component\Ldap\Exception;
 
 /**
- * LdapException is throw if php ldap module is not loaded.
+ * LdapException is thrown if php ldap module is not loaded.
  *
  * @author Charles Sarrazin <charles@sarraz.in>
  */
diff --git a/src/Symfony/Component/Ldap/Exception/LdapException.php b/src/Symfony/Component/Ldap/Exception/LdapException.php
index 4045f32cf4..df8eabfbcb 100644
--- a/src/Symfony/Component/Ldap/Exception/LdapException.php
+++ b/src/Symfony/Component/Ldap/Exception/LdapException.php
@@ -12,7 +12,7 @@
 namespace Symfony\Component\Ldap\Exception;
 
 /**
- * LdapException is throw if php ldap module is not loaded.
+ * LdapException is thrown if php ldap module is not loaded.
  *
  * @author Grégoire Pineau <lyrixx@lyrixx.info>
  */
diff --git a/src/Symfony/Component/Process/Process.php b/src/Symfony/Component/Process/Process.php
index 55dd0112a6..5e3993d788 100644
--- a/src/Symfony/Component/Process/Process.php
+++ b/src/Symfony/Component/Process/Process.php
@@ -419,6 +419,7 @@ class Process implements \IteratorAggregate
         } while ($running);
 
         while ($this->isRunning()) {
+            $this->checkTimeout();
             usleep(1000);
         }
 
diff --git a/src/Symfony/Component/Process/Tests/ErrorProcessInitiator.php b/src/Symfony/Component/Process/Tests/ErrorProcessInitiator.php
new file mode 100755
index 0000000000..c37aeb5c8f
--- /dev/null
+++ b/src/Symfony/Component/Process/Tests/ErrorProcessInitiator.php
@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Process\Tests;
+
+use Symfony\Component\Process\Exception\ProcessTimedOutException;
+use Symfony\Component\Process\Process;
+
+require \dirname(__DIR__).'/vendor/autoload.php';
+
+list('e' => $php) = getopt('e:') + ['e' => 'php'];
+
+try {
+    $process = new Process("exec $php -r \"echo 'ready'; trigger_error('error', E_USER_ERROR);\"");
+    $process->start();
+    $process->setTimeout(0.5);
+    while (false === strpos($process->getOutput(), 'ready')) {
+        usleep(1000);
+    }
+    $process->signal(SIGSTOP);
+    $process->wait();
+
+    return $process->getExitCode();
+} catch (ProcessTimedOutException $t) {
+    echo $t->getMessage().PHP_EOL;
+
+    return 1;
+}
diff --git a/src/Symfony/Component/Process/Tests/ProcessTest.php b/src/Symfony/Component/Process/Tests/ProcessTest.php
index 476456d1b0..8ae8d4ca94 100644
--- a/src/Symfony/Component/Process/Tests/ProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessTest.php
@@ -1511,6 +1511,25 @@ EOTXT;
         $this->assertSame($env, $p->getEnv());
     }
 
+    public function testWaitStoppedDeadProcess()
+    {
+        $process = $this->getProcess(self::$phpBin.' '.__DIR__.'/ErrorProcessInitiator.php -e '.self::$phpBin);
+        $process->start();
+        $process->setTimeout(2);
+        $process->wait();
+        $this->assertFalse($process->isRunning());
+    }
+
+    /**
+     * @param string      $commandline
+     * @param string|null $cwd
+     * @param array|null  $env
+     * @param string|null $input
+     * @param int         $timeout
+     * @param array       $options
+     *
+     * @return Process
+     */
     private function getProcess($commandline, string $cwd = null, array $env = null, $input = null, ?int $timeout = 60): Process
     {
         if (\is_string($commandline)) {
diff --git a/src/Symfony/Component/Security/Http/Authorization/AccessDeniedHandlerInterface.php b/src/Symfony/Component/Security/Http/Authorization/AccessDeniedHandlerInterface.php
index aea901181f..871c877f57 100644
--- a/src/Symfony/Component/Security/Http/Authorization/AccessDeniedHandlerInterface.php
+++ b/src/Symfony/Component/Security/Http/Authorization/AccessDeniedHandlerInterface.php
@@ -26,7 +26,7 @@ interface AccessDeniedHandlerInterface
     /**
      * Handles an access denied failure.
      *
-     * @return Response may return null
+     * @return Response|null
      */
     public function handle(Request $request, AccessDeniedException $accessDeniedException);
 }