- fix for entities recursion problem
- Resolve: rhbz#459714 daniel
This commit is contained in:
Daniel Veillard
parent
a4f85c9c20
commit
1a9ffb4d7f
216
libxml2-2.6.32.entities.patch
Normal file
216
libxml2-2.6.32.entities.patch
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@ -0,0 +1,216 @@
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Index: include/libxml/parser.h
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===================================================================
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--- include/libxml/parser.h (revision 3771)
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+++ include/libxml/parser.h (working copy)
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@@ -297,6 +297,7 @@ struct _xmlParserCtxt {
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*/
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xmlError lastError;
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xmlParserMode parseMode; /* the parser mode */
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+ unsigned long nbentities; /* number of entities references */
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};
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/**
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Index: parserInternals.c
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===================================================================
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--- parserInternals.c (revision 3771)
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+++ parserInternals.c (working copy)
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@@ -1670,6 +1670,7 @@ xmlInitParserCtxt(xmlParserCtxtPtr ctxt)
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ctxt->depth = 0;
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ctxt->charset = XML_CHAR_ENCODING_UTF8;
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ctxt->catalogs = NULL;
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+ ctxt->nbentities = 0;
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xmlInitNodeInfoSeq(&ctxt->node_seq);
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return(0);
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}
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Index: SAX2.c
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===================================================================
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--- SAX2.c (revision 3772)
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+++ SAX2.c (working copy)
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@@ -580,7 +580,8 @@ xmlSAX2GetEntity(void *ctx, const xmlCha
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return(NULL);
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}
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ret->owner = 1;
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- ret->checked = 1;
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+ if (ret->checked == 0)
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+ ret->checked = 1;
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}
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return(ret);
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}
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--- parser.c.orig 2008-04-08 16:47:58.000000000 +0200
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+++ parser.c 2008-08-25 17:55:30.000000000 +0200
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@@ -2344,7 +2344,7 @@ xmlStringLenDecodeEntities(xmlParserCtxt
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return(NULL);
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last = str + len;
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- if (ctxt->depth > 40) {
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+ if ((ctxt->depth > 40) || (ctxt->nbentities >= 500000)) {
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xmlFatalErr(ctxt, XML_ERR_ENTITY_LOOP, NULL);
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return(NULL);
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}
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@@ -2382,6 +2382,11 @@ xmlStringLenDecodeEntities(xmlParserCtxt
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"String decoding Entity Reference: %.30s\n",
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str);
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ent = xmlParseStringEntityRef(ctxt, &str);
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+ if (ctxt->lastError.code == XML_ERR_ENTITY_LOOP)
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+ goto int_error;
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+ ctxt->nbentities++;
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+ if (ent != NULL)
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+ ctxt->nbentities += ent->checked;
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if ((ent != NULL) &&
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(ent->etype == XML_INTERNAL_PREDEFINED_ENTITY)) {
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if (ent->content != NULL) {
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@@ -2427,6 +2432,11 @@ xmlStringLenDecodeEntities(xmlParserCtxt
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xmlGenericError(xmlGenericErrorContext,
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"String decoding PE Reference: %.30s\n", str);
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ent = xmlParseStringPEReference(ctxt, &str);
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+ if (ctxt->lastError.code == XML_ERR_ENTITY_LOOP)
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+ goto int_error;
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+ ctxt->nbentities++;
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+ if (ent != NULL)
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+ ctxt->nbentities += ent->checked;
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if (ent != NULL) {
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if (ent->content == NULL) {
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if (xmlLoadEntityContent(ctxt, ent) < 0) {
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@@ -2466,6 +2476,7 @@ xmlStringLenDecodeEntities(xmlParserCtxt
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mem_error:
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xmlErrMemory(ctxt, NULL);
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+int_error:
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if (rep != NULL)
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xmlFree(rep);
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if (buffer != NULL)
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@@ -3280,6 +3291,9 @@ xmlParseAttValueComplex(xmlParserCtxtPtr
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}
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} else {
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ent = xmlParseEntityRef(ctxt);
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+ ctxt->nbentities++;
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+ if (ent != NULL)
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+ ctxt->nbentities += ent->checked;
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if ((ent != NULL) &&
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(ent->etype == XML_INTERNAL_PREDEFINED_ENTITY)) {
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if (len > buf_size - 10) {
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@@ -4566,6 +4580,7 @@ xmlParseEntityDecl(xmlParserCtxtPtr ctxt
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int isParameter = 0;
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xmlChar *orig = NULL;
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int skipped;
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+ unsigned long oldnbent = ctxt->nbentities;
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/* GROW; done in the caller */
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if (CMP8(CUR_PTR, '<', '!', 'E', 'N', 'T', 'I', 'T', 'Y')) {
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@@ -4783,6 +4798,7 @@ xmlParseEntityDecl(xmlParserCtxtPtr ctxt
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}
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}
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if (cur != NULL) {
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+ cur->checked = ctxt->nbentities - oldnbent;
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if (cur->orig != NULL)
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xmlFree(orig);
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else
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@@ -6189,6 +6205,11 @@ xmlParseReference(xmlParserCtxtPtr ctxt)
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if (ent == NULL) return;
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if (!ctxt->wellFormed)
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return;
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+ ctxt->nbentities++;
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+ if (ctxt->nbentities >= 500000) {
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+ xmlFatalErr(ctxt, XML_ERR_ENTITY_LOOP, NULL);
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+ return;
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+ }
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was_checked = ent->checked;
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if ((ent->name != NULL) &&
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(ent->etype != XML_INTERNAL_PREDEFINED_ENTITY)) {
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@@ -6249,6 +6270,7 @@ xmlParseReference(xmlParserCtxtPtr ctxt)
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xmlFreeNodeList(list);
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}
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} else {
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+ unsigned long oldnbent = ctxt->nbentities;
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/*
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* 4.3.2: An internal general parsed entity is well-formed
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* if its replacement text matches the production labeled
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@@ -6271,6 +6293,7 @@ xmlParseReference(xmlParserCtxtPtr ctxt)
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ret = xmlParseBalancedChunkMemoryInternal(ctxt,
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value, user_data, &list);
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ctxt->depth--;
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+
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} else if (ent->etype ==
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XML_EXTERNAL_GENERAL_PARSED_ENTITY) {
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ctxt->depth++;
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@@ -6283,6 +6306,7 @@ xmlParseReference(xmlParserCtxtPtr ctxt)
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xmlErrMsgStr(ctxt, XML_ERR_INTERNAL_ERROR,
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"invalid entity type found\n", NULL);
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}
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+ ent->checked = ctxt->nbentities - oldnbent;
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if (ret == XML_ERR_ENTITY_LOOP) {
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xmlFatalErr(ctxt, XML_ERR_ENTITY_LOOP, NULL);
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return;
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@@ -6339,8 +6363,10 @@ xmlParseReference(xmlParserCtxtPtr ctxt)
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list = NULL;
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}
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}
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- ent->checked = 1;
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+ if (ent->checked == 0)
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+ ent->checked = 1;
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}
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+ ctxt->nbentities += ent->checked;
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if (ent->children == NULL) {
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/*
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@@ -6349,7 +6375,7 @@ xmlParseReference(xmlParserCtxtPtr ctxt)
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* though parsing for first checking go though the entity
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* content to generate callbacks associated to the entity
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*/
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- if (was_checked == 1) {
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+ if (was_checked != 0) {
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void *user_data;
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/*
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* This is a bit hackish but this seems the best
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@@ -11480,7 +11506,7 @@ xmlParseCtxtExternalEntity(xmlParserCtxt
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if (ctx == NULL) return(-1);
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- if (ctx->depth > 40) {
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+ if ((ctx->depth > 40) || (ctx->nbentities >= 500000)) {
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return(XML_ERR_ENTITY_LOOP);
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}
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@@ -11681,7 +11707,8 @@ xmlParseExternalEntityPrivate(xmlDocPtr
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xmlChar start[4];
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xmlCharEncoding enc;
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- if (depth > 40) {
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+ if ((depth > 40) ||
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+ ((oldctxt != NULL) && (oldctxt->nbentities >= 500000))) {
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return(XML_ERR_ENTITY_LOOP);
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}
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@@ -11824,6 +11851,7 @@ xmlParseExternalEntityPrivate(xmlDocPtr
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oldctxt->node_seq.maximum = ctxt->node_seq.maximum;
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oldctxt->node_seq.length = ctxt->node_seq.length;
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oldctxt->node_seq.buffer = ctxt->node_seq.buffer;
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+ oldctxt->nbentities += ctxt->nbentities;
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ctxt->node_seq.maximum = 0;
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ctxt->node_seq.length = 0;
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ctxt->node_seq.buffer = NULL;
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@@ -11924,7 +11952,7 @@ xmlParseBalancedChunkMemoryInternal(xmlP
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int size;
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xmlParserErrors ret = XML_ERR_OK;
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- if (oldctxt->depth > 40) {
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+ if ((oldctxt->depth > 40) || (oldctxt->nbentities >= 500000)) {
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return(XML_ERR_ENTITY_LOOP);
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}
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@@ -12048,6 +12076,7 @@ xmlParseBalancedChunkMemoryInternal(xmlP
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ctxt->myDoc->last = last;
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}
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+ oldctxt->nbentities += ctxt->nbentities;
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ctxt->sax = oldsax;
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ctxt->dict = NULL;
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ctxt->attsDefault = NULL;
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@@ -13363,6 +13392,7 @@ xmlCtxtReset(xmlParserCtxtPtr ctxt)
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ctxt->depth = 0;
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ctxt->charset = XML_CHAR_ENCODING_UTF8;
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ctxt->catalogs = NULL;
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+ ctxt->nbentities = 0;
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xmlInitNodeInfoSeq(&ctxt->node_seq);
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if (ctxt->attsDefault != NULL) {
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14
libxml2.spec
14
libxml2.spec
@ -1,7 +1,7 @@
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Summary: Library providing XML and HTML support
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Summary: Library providing XML and HTML support
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Name: libxml2
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Name: libxml2
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Version: 2.6.32
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Version: 2.6.32
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Release: 3%{?dist}%{?extra_release}
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Release: 4%{?dist}%{?extra_release}
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License: MIT
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License: MIT
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Group: Development/Libraries
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Group: Development/Libraries
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Source: ftp://xmlsoft.org/libxml2-%{version}.tar.gz
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Source: ftp://xmlsoft.org/libxml2-%{version}.tar.gz
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@ -9,6 +9,7 @@ BuildRoot: %{_tmppath}/%{name}-%{version}-root
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BuildRequires: python python-devel zlib-devel
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BuildRequires: python python-devel zlib-devel
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URL: http://xmlsoft.org/
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URL: http://xmlsoft.org/
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Patch0: libxml2-multilib.patch
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Patch0: libxml2-multilib.patch
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Patch1: libxml2-2.6.32.entities.patch
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%description
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%description
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This library allows to manipulate XML files. It includes support
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This library allows to manipulate XML files. It includes support
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@ -67,6 +68,7 @@ at parse time or later once the document has been modified.
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%prep
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%prep
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%setup -q
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%setup -q
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%patch0 -p1
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%patch0 -p1
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%patch1 -p0
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%build
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%build
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%configure
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%configure
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@ -141,14 +143,18 @@ rm -fr %{buildroot}
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%doc doc/python.html
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%doc doc/python.html
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%changelog
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%changelog
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* Fri May 30 2008 Daniel Veillard <veillard@redhat.com> 2.6.31-3.fc10
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* Mon Aug 25 2008 Daniel Veillard <veillard@redhat.com> 2.6.32-4.fc10
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- fix for entities recursion problem
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- Resolve: rhbz#459714
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* Fri May 30 2008 Daniel Veillard <veillard@redhat.com> 2.6.32-3.fc10
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- cleanup based on Fedora packaging guidelines, should fix #226079
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- cleanup based on Fedora packaging guidelines, should fix #226079
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- separate a -static package
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- separate a -static package
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* Thu May 15 2008 Daniel Veillard <veillard@redhat.com> 2.6.31-2.fc10
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* Thu May 15 2008 Daniel Veillard <veillard@redhat.com> 2.6.32-2.fc10
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- try to fix multiarch problems like #440206
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- try to fix multiarch problems like #440206
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* Tue Apr 8 2008 Daniel Veillard <veillard@redhat.com> 2.6.31-1.fc9
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* Tue Apr 8 2008 Daniel Veillard <veillard@redhat.com> 2.6.32-1.fc9
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- upstream release 2.6.32 see http://xmlsoft.org/news.html
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- upstream release 2.6.32 see http://xmlsoft.org/news.html
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- many bug fixed upstream
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- many bug fixed upstream
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