Commits on Jul 12, 2022

1. ASN1/BER: fix signed integer overflow …

   ```
   protocols/snmp_proto.c:77:23: runtime error: signed integer overflow: 6 + 2147483647 cannot be represented in type 'int'
    #0 0x52f69e in ndpi_search_snmp ndpi/src/lib/protocols/snmp_proto.c:77:23
    ntop#1 0x4c5347 in check_ndpi_detection_func ndpi/src/lib/ndpi_main.c:5211:4
    ntop#2 0x4c5591 in ndpi_check_flow_func ndpi/src/lib/ndpi_main.c:0
    ntop#3 0x4c8903 in ndpi_detection_process_packet ndpi/src/lib/ndpi_main.c:6145:15
    ntop#4 0x4b3712 in LLVMFuzzerTestOneInput ndpi/fuzz/fuzz_process_packet.c:29:5
   [...]
   ```
   Found by oss-fuzzer.
   See: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49057

   

   IvanNardi committed Jul 12, 2022
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