Backport #54385 to 23.6: Check for overflow before addition in `analy…

…sisOfVariance` function
ClickHouse · Sep 7, 2023 · 2ba177f · 2ba177f
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diff --git a/src/AggregateFunctions/Moments.h b/src/AggregateFunctions/Moments.h
@@ -459,6 +459,10 @@ struct AnalysisOfVarianceMoments
 
     void add(T value, size_t group)
     {
+        if (group == std::numeric_limits<size_t>::max())
+            throw Exception(ErrorCodes::BAD_ARGUMENTS, "Too many groups for analysis of variance (should be no more than {}, got {})",
+                MAX_GROUPS_NUMBER, group);
+
         resizeIfNeeded(group + 1);
         xs1[group] += value;
         xs2[group] += value * value;

diff --git a/tests/queries/0_stateless/02874_analysis_of_variance_overflow.reference b/tests/queries/0_stateless/02874_analysis_of_variance_overflow.reference
diff --git a/tests/queries/0_stateless/02874_analysis_of_variance_overflow.sql b/tests/queries/0_stateless/02874_analysis_of_variance_overflow.sql
@@ -0,0 +1 @@
+SELECT analysisOfVariance(1, 18446744073709551615); -- { serverError BAD_ARGUMENTS }