From: Mark Andrews <marka@isc.org>
Date: Tue, 19 May 2026 01:09:02 +0000 (+1000)
Subject: Fix EDNS Report Channel checking code
X-Git-Tag: v9.21.24~13^2~7
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16dbf9ba918542a590a935f6881889e30fe0dc33;p=thirdparty%2Fbind9.git

Fix EDNS Report Channel checking code

When the buffer to check the Report Channel domain was constructed
isc_buffer_setactive was not called.  This is now needed as
dns_name_fromwire is being corrected to check the active region.
---

diff --git a/lib/dns/rdata/generic/opt_41.c b/lib/dns/rdata/generic/opt_41.c
index b71128b6749..d9513b75fd4 100644
--- a/lib/dns/rdata/generic/opt_41.c
+++ b/lib/dns/rdata/generic/opt_41.c
@@ -257,6 +257,7 @@ fromwire_opt(ARGS_FROMWIRE) {
 			}
 			isc_buffer_init(&b, sregion.base, length);
 			isc_buffer_add(&b, length);
+			isc_buffer_setactive(&b, length);
 			name = dns_fixedname_initname(&fixed);
 			result = dns_name_fromwire(name, &b, dctx, NULL);
 			if (result != ISC_R_SUCCESS || name->length != length ||