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3124. [bug] Use an rdataset attribute flag to indicate

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negative-cache records rather than using rrtype 0;
			this will prevent problems when that rrtype is
			used in actual DNS packets. [RT #24777]

3123.	[security]	Change #2912 exposed a latent flaw in
			dns_rdataset_totext() that could cause named to
			crash with an assertion failure. [RT #24777]
This commit is contained in:
Evan Hunt
2011-06-08 22:13:51 +00:00
parent 46a8315efe
commit 6de9744cf9
12 changed files with 137 additions and 56 deletions
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4
lib/dns/rdataset.c
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@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: rdataset.c,v 1.89 2011/05/26 07:56:38 marka Exp $ */
/* $Id: rdataset.c,v 1.90 2011/06/08 22:13:50 each Exp $ */
/*! \file */
@@ -344,7 +344,7 @@ towiresorted(dns_rdataset_t *rdataset, const dns_name_t *owner_name,
count = 1;
result = dns_rdataset_first(rdataset);
INSIST(result == ISC_R_NOMORE);
} else if (rdataset->type == 0) {
} else if ((rdataset->attributes & DNS_RDATASETATTR_NEGATIVE) != 0) {
/*
* This is a negative caching rdataset.
*/