Blame SOURCES/CVE-2022-2928.patch

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diff --git a/common/options.c b/common/options.c
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index a53484e..40238f7 100644
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--- a/common/options.c
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+++ b/common/options.c
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@@ -4499,6 +4499,8 @@ add_option(struct option_state *options,
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 	if (!option_cache_allocate(&oc, MDL)) {
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 		log_error("No memory for option cache adding %s (option %d).",
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 			  option->name, option_num);
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+		/* Get rid of reference created during hash lookup. */
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+		option_dereference(&option, MDL);
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 		return 0;
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 	}
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@@ -4510,6 +4512,8 @@ add_option(struct option_state *options,
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 			     MDL)) {
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 		log_error("No memory for constant data adding %s (option %d).",
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 			  option->name, option_num);
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+		/* Get rid of reference created during hash lookup. */
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+		option_dereference(&option, MDL);
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 		option_cache_dereference(&oc, MDL);
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 		return 0;
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 	}
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@@ -4518,6 +4522,9 @@ add_option(struct option_state *options,
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 	save_option(&dhcp_universe, options, oc);
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 	option_cache_dereference(&oc, MDL);
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+	/* Get rid of reference created during hash lookup. */
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+	option_dereference(&option, MDL);
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+
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 	return 1;
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 }
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