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Backported from upstream commits labelled "Bug 1178058" from the esr38 branch
by Boris Zbarsky <bzbarsky@mit.edu> and Bobby Holley <bobbyholley@gmail.com>.
--- icecat-31.8.0/docshell/base/nsDocShell.cpp
+++ icecat-31.8.0/docshell/base/nsDocShell.cpp
@@ -1546,12 +1546,21 @@
if (owner && mItemType != typeChrome) {
nsCOMPtr<nsIPrincipal> ownerPrincipal = do_QueryInterface(owner);
- if (nsContentUtils::IsSystemOrExpandedPrincipal(ownerPrincipal)) {
+ if (nsContentUtils::IsSystemPrincipal(ownerPrincipal)) {
if (ownerIsExplicit) {
return NS_ERROR_DOM_SECURITY_ERR;
}
owner = nullptr;
inheritOwner = true;
+ } else if (nsContentUtils::IsExpandedPrincipal(ownerPrincipal)) {
+ if (ownerIsExplicit) {
+ return NS_ERROR_DOM_SECURITY_ERR;
+ }
+ // Don't inherit from the current page. Just do the safe thing
+ // and pretend that we were loaded by a nullprincipal.
+ owner = do_CreateInstance("@mozilla.org/nullprincipal;1");
+ NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
+ inheritOwner = false;
}
}
if (!owner && !inheritOwner && !ownerIsExplicit) {
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