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Check pointer for NULL before dereferencing

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This commit is contained in:
Pavlos Antoniou 2017-05-18 11:09:56 +03:00
parent 2b128a2f1b
commit 167732cae4
1 changed files with 10 additions and 8 deletions
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18
src/lib/ndpi_main.c
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@ -2955,17 +2955,19 @@ static int ndpi_init_packet_header(struct ndpi_detection_module_struct *ndpi_str
u_int8_t l4protocol;
u_int8_t l4_result;
/* reset payload_packet_len, will be set if ipv4 tcp or udp */
flow->packet.payload_packet_len = 0;
flow->packet.l4_packet_len = 0;
flow->packet.l3_packet_len = packetlen;
if (flow) {
/* reset payload_packet_len, will be set if ipv4 tcp or udp */
flow->packet.payload_packet_len = 0;
flow->packet.l4_packet_len = 0;
flow->packet.l3_packet_len = packetlen;
flow->packet.tcp = NULL;
flow->packet.udp = NULL;
flow->packet.generic_l4_ptr = NULL;
flow->packet.tcp = NULL;
flow->packet.udp = NULL;
flow->packet.generic_l4_ptr = NULL;
#ifdef NDPI_DETECTION_SUPPORT_IPV6
flow->packet.iphv6 = NULL;
flow->packet.iphv6 = NULL;
#endif /* NDPI_DETECTION_SUPPORT_IPV6 */
}
if(flow) {
ndpi_apply_flow_protocol_to_packet(flow, &flow->packet);