ci: move the fuzz target from OSS-Fuzz

as discussed in google/oss-fuzz#12050

Author: evverx

fuzz/pcap_fuzzer.py

@@ -0,0 +1,32 @@
+#!/usr/bin/python3
+
+# SPDX-License-Identifier: GPL-2.0-only
+# This file is part of Scapy
+# See https://scapy.net/ for more information
+
+import sys
+import atheris
+
+with atheris.instrument_imports():
+    import io
+    import scapy
+    import scapy.error
+    import scapy.layers.all
+    import scapy.utils
+
+
+def TestOneInput(input_bytes):
+    try:
+        for p in scapy.utils.rdpcap(io.BytesIO(input_bytes)):
+            p.summary()
+    except scapy.error.Scapy_Exception:
+        pass
+
+
+def main():
+    atheris.Setup(sys.argv, TestOneInput)
+    atheris.Fuzz()
+
+
+if __name__ == "__main__":
+    main()