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Fix stack overflow (#807)

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Fix stack overflow in HandleNode by explicitly limiting the depth of recursion.
This commit is contained in:
Alan Griffiths
2020-04-09 19:02:10 +01:00
committed by GitHub
parent 70205f5d88
commit 4edff1fa5d
5 changed files with 140 additions and 0 deletions
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3
src/singledocparser.cpp
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@@ -7,6 +7,7 @@
#include "singledocparser.h"
#include "tag.h"
#include "token.h"
#include "yaml-cpp/depthguard.h"
#include "yaml-cpp/emitterstyle.h"
#include "yaml-cpp/eventhandler.h"
#include "yaml-cpp/exceptions.h" // IWYU pragma: keep
@@ -47,6 +48,8 @@ void SingleDocParser::HandleDocument(EventHandler& eventHandler) {
}
void SingleDocParser::HandleNode(EventHandler& eventHandler) {
DepthGuard<2000> depthguard(depth, m_scanner.mark(), ErrorMsg::BAD_FILE);
// an empty node *is* a possibility
if (m_scanner.empty()) {
eventHandler.OnNull(m_scanner.mark(), NullAnchor);