bug 750932 - multipart delimiter check r=jduell

netwerk/streamconv/converters/nsMultiMixedConv.cpp

@@ -565,7 +565,8 @@ nsMultiMixedConv::OnDataAvailable(nsIRequest *request, nsISupports *context,
     int32_t tokenLinefeed = 1;
     while ( (token = FindToken(cursor, bufLen)) ) {
 
-        if (*(token+mTokenLen+1) == '-') {
+        if (((token + mTokenLen) < (cursor + bufLen)) &&
+            (*(token + mTokenLen + 1) == '-')) {
             // This was the last delimiter so we can stop processing
             rv = SendData(cursor, LengthToToken(cursor, token));
             if (NS_FAILED(rv)) return rv;

netwerk/test/unit/xpcshell.ini

@@ -129,8 +129,6 @@ skip-if = bits != 32
 [test_multipart_byteranges.js]
 [test_multipart_streamconv.js]
 [test_multipart_streamconv_missing_lead_boundary.js]
-# Bug 750932: test fails under AddressSanitizer
-fail-if = asan
 [test_nestedabout_serialize.js]
 [test_net_addr.js]
 # Bug 732363: test fails on windows for unknown reasons.