From ada4fe4aa8f88300cfc0dbe6ee965975274b1c40 Mon Sep 17 00:00:00 2001
From: Ivan Nardi <12729895+IvanNardi@users.noreply.github.com>
Date: Tue, 6 Dec 2022 17:41:58 +0100
Subject: fuzz: add a new fuzzer testing memory allocation failures (#1818)

Try to fuzz error paths triggered by allocation errors.
Fix some errors already found by this new fuzzer.
Basic idea taken from: https://github.com/harfbuzz/harfbuzz/pull/2566/files

`FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION` is a standard define used to
(not)compile specific code in fuzzing builds.
See: https://llvm.org/docs/LibFuzzer.html
---
 src/lib/ndpi_utils.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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

diff --git a/src/lib/ndpi_utils.c b/src/lib/ndpi_utils.c
index ee6f076ab..b0922acd7 100644
--- a/src/lib/ndpi_utils.c
+++ b/src/lib/ndpi_utils.c
@@ -131,8 +131,9 @@ void * ndpi_tsearch(const void *vkey, void **vrootp,
     *rootp = q;			/* link new node to old */
     q->key = key;		/* initialize new node */
     q->left = q->right = (ndpi_node *)0;
+    return ((void *)q->key);
   }
-  return ((void *)q->key);
+  return ((void *)0);
 }
 
 /* ****************************************** */
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