Blame SOURCES/libxml2-2.9.1-CVE-2019-19956.patch
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From 5a02583c7e683896d84878bd90641d8d9b0d0549 Mon Sep 17 00:00:00 2001
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From: Zhipeng Xie <xiezhipeng1@huawei.com>
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Date: Wed, 7 Aug 2019 17:39:17 +0800
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Subject: [PATCH] Fix memory leak in xmlParseBalancedChunkMemoryRecover
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When doc is NULL, namespace created in xmlTreeEnsureXMLDecl
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is bind to newDoc->oldNs, in this case, set newDoc->oldNs to
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NULL and free newDoc will cause a memory leak.
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Found with libFuzzer.
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Closes #82.
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---
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parser.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/parser.c b/parser.c
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index 1ce1ccf1..26d9f4e3 100644
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--- a/parser.c
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+++ b/parser.c
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@@ -13894,7 +13894,8 @@ xmlParseBalancedChunkMemoryRecover(xmlDocPtr doc, xmlSAXHandlerPtr sax,
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xmlFreeParserCtxt(ctxt);
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newDoc->intSubset = NULL;
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newDoc->extSubset = NULL;
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- newDoc->oldNs = NULL;
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+ if(doc != NULL)
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+ newDoc->oldNs = NULL;
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xmlFreeDoc(newDoc);
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return(ret);
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--
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2.24.1
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