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File _service:tar_scm_kernel_repo:backport-dont-enabled-serve-stale-on-duplicate-queries.patch of Package bind
From dd7dde5743715dc0dec2defbb92b1a8637977bf9 Mon Sep 17 00:00:00 2001 From: Matthijs Mekking <matthijs@isc.org> Date: Tue, 2 Aug 2022 14:21:40 +0200 Subject: [PATCH] Don't enable serve-stale on duplicate queries When checking if we should enable serve-stale, add an early out case when the result is an error signalling a duplicate query or a query that would be dropped. (cherry picked from commit 059a4c2f4d9d3cff371842f43208d021509314fa) --- lib/ns/query.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/lib/ns/query.c b/lib/ns/query.c index d0f025dbb9a..1bf36fea283 100644 --- a/lib/ns/query.c +++ b/lib/ns/query.c @@ -7230,6 +7230,14 @@ query_usestale(query_ctx_t *qctx, isc_result_t result) { return (false); } + if (result == DNS_R_DUPLICATE || result == DNS_R_DROP) { + /* + * Don't enable serve-stale if the result signals a duplicate + * query or query that is being dropped. + */ + return (false); + } + qctx_clean(qctx); qctx_freedata(qctx); -- GitLab
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