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matroskaenc: check cue point validity before reallocation 

Prevents memory leak and possible access to freed memory.
Fixes CID605744.
This commit is contained in:
Janne Grunau 2012-10-09 14:54:01 +02:00
parent 53e122dd4a
commit 4ffbe3f3a5
1 changed files with 3 additions and 3 deletions
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6
libavformat/matroskaenc.c
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@ -368,13 +368,13 @@ static int mkv_add_cuepoint(mkv_cues *cues, int stream, int64_t ts, int64_t clus
{
mkv_cuepoint *entries = cues->entries;
if (ts < 0)
return 0;
entries = av_realloc(entries, (cues->num_entries + 1) * sizeof(mkv_cuepoint));
if (entries == NULL)
return AVERROR(ENOMEM);
if (ts < 0)
return 0;
entries[cues->num_entries ].pts = ts;
entries[cues->num_entries ].tracknum = stream + 1;
entries[cues->num_entries++].cluster_pos = cluster_pos - cues->segment_offset;