From ac0a9f144e8623e35c17616321a51d343f0ed7ec Mon Sep 17 00:00:00 2001
From: Roy Tam <roytam@gmail.com>
Date: Fri, 24 Jan 2020 06:40:47 +0800
Subject: [PATCH] nsContentSecurityManager::CheckFTPSubresourceLoad: fix crash
 when viewing HTML in FTP site

---
 dom/security/nsContentSecurityManager.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dom/security/nsContentSecurityManager.cpp b/dom/security/nsContentSecurityManager.cpp
index 5c6701992f..e8acbf7225 100644
--- a/dom/security/nsContentSecurityManager.cpp
+++ b/dom/security/nsContentSecurityManager.cpp
@@ -139,6 +139,9 @@ nsContentSecurityManager::CheckFTPSubresourceLoad(nsIChannel* aChannel)
   nsIPrincipal* triggeringPrincipal = loadInfo->TriggeringPrincipal();
   nsCOMPtr<nsIURI> tURI;
   triggeringPrincipal->GetURI(getter_AddRefs(tURI));
+  if(!tURI) {
+    return NS_OK;
+  }
   bool isTrigFtpURI = (NS_SUCCEEDED(tURI->SchemeIs("ftp", &isTrigFtpURI)) && isTrigFtpURI);
   if (isTrigFtpURI) {
     return NS_OK;