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diff -up libsmi-0.4.8/lib/smi.c.CVE-2010-2891 libsmi-0.4.8/lib/smi.c
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--- libsmi-0.4.8/lib/smi.c.CVE-2010-2891	2010-11-01 14:27:57.209065000 -0400
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+++ libsmi-0.4.8/lib/smi.c	2010-11-01 14:29:17.615065001 -0400
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@@ -1314,10 +1314,15 @@ SmiNode *smiGetNode(SmiModule *smiModule
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     }
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     if (isdigit((int)node2[0])) {
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-	for (oidlen = 0, p = strtok(node2, ". "); p;
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+	for (oidlen = 0, p = strtok(node2, ". ");
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+	     p && oidlen < sizeof(oid)/sizeof(oid[0]);
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 	     oidlen++, p = strtok(NULL, ". ")) {
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 	    oid[oidlen] = strtoul(p, NULL, 0);
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 	}
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+	if (p) {
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+	    /* the numeric OID is too long */
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+	    return NULL;
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+	}
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 	nodePtr = getNode(oidlen, oid);
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 	if (nodePtr) {
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 	    if (modulePtr) {