From 3c7ed34ce93f04f9d8e6d5c4a22f746a5a7c00dc Mon Sep 17 00:00:00 2001
From: Ivan Nardi <12729895+IvanNardi@users.noreply.github.com>
Date: Tue, 2 Jan 2024 15:22:44 +0100
Subject: fuzz: improve fuzzing coverage (#2239)

---
 src/lib/ndpi_analyze.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/lib/ndpi_analyze.c')

diff --git a/src/lib/ndpi_analyze.c b/src/lib/ndpi_analyze.c
index 06d461561..198aa4f9f 100644
--- a/src/lib/ndpi_analyze.c
+++ b/src/lib/ndpi_analyze.c
@@ -1729,6 +1729,9 @@ double ndpi_pearson_correlation(u_int32_t *values_a, u_int32_t *values_b, u_int1
   variance_a = sum_squared_diff_a / (double)num_values, variance_b = sum_squared_diff_b / (double)num_values;
   covariance = sum_product_diff / (double)num_values;
 
+  if(variance_a == 0.0 || variance_b == 0.0)
+    return(0.0);
+
   return(covariance / sqrt(variance_a * variance_b));
 }
 
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