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Null Pointer Dereference  at packet-ldss.c:480

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dissect_ldss_transfer

(/home/sate/Testcases/c/cve/wireshark-1.2.0/epan/dissectors/packet-ldss.c)expand/collapse
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 457  dissect_ldss_transfer (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 458  {
 459          conversation_t *transfer_conv;
 460          ldss_transfer_info_t *transfer_info;
 461          struct tcpinfo *transfer_tcpinfo;
 462   
 463          proto_tree      *ti, *line_tree = NULL, *ldss_tree = NULL;
 464   
 465          nstime_t broadcast_response_time;
 466   
 467          /* Look for the transfer conversation; this was created during
 468           * earlier broadcast dissection (see prepate_ldss_transfer_conv) */
 469          transfer_conv = find_conversation (pinfo->fd->num, &pinfo->src, &pinfo->dst,
 470                                             PT_TCP, pinfo->srcport, pinfo->destport, 0);
 471[+]         transfer_info = conversation_get_proto_data(transfer_conv, proto_ldss);
 472          transfer_tcpinfo = pinfo->private_data;
 473   
 474          /* For a pull, the first packet in the TCP connection is the file request.
 475           * First packet is identified by relative seq/ack numbers of 1.
 476           * File request only appears on a pull (triggered by an offer - see above
 477           * about broadcasts) */
 478          if (transfer_tcpinfo->seq == 1 &&
 479              transfer_tcpinfo->lastackseq == 1 &&
 480              transfer_info->broadcast->message_id == MESSAGE_ID_WILLSEND) {
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Change Warning 2712.32206 : Null Pointer Dereference

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