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Added check for valid tvb before calling tvb_length(). 

svn path=/trunk/; revision=33774
This commit is contained in:
Stig Bjørlykke 2010-08-11 21:27:35 +00:00
parent 9969691f49
commit 894f256912
1 changed files with 4 additions and 2 deletions
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6
epan/dissectors/packet-sdp.c
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@ -1368,13 +1368,15 @@ decode_sdp_fmtp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, gint offset
*/
if (mime_type != NULL && g_ascii_strcasecmp(mime_type, "H264") == 0) {
if (strcmp(field_name, "profile-level-id") == 0) {
int length;
int length = 0;
/* Length includes "=" as it's required by ascii_bytes_to_tvb()*/
tokenlen = end_offset - offset;
format_specific_parameter = tvb_get_ephemeral_string(tvb, offset, tokenlen);
data_tvb = ascii_bytes_to_tvb(tvb, pinfo, tokenlen, format_specific_parameter);
length = tvb_length(data_tvb);
if (data_tvb) {
length = tvb_length(data_tvb);
}
if (length == 3){
if(h264_handle && data_tvb){
dissect_h264_profile(data_tvb, pinfo, tree);