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asfdec: ensure number of streams is within bounds; remove VLA in asf_read_pts() 

Originally committed as revision 23756 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-06-24 15:10:06 +00:00
parent dd93649b71
commit 30cdfb49b4
1 changed files with 7 additions and 1 deletions
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8
libavformat/asfdec.c
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@ -35,6 +35,7 @@ void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
#undef NDEBUG
#include <assert.h>
#define ASF_MAX_STREAMS 127
#define FRAME_HEADER_SIZE 17
// Fix Me! FRAME_HEADER_SIZE may be different.
@ -244,6 +245,11 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
int64_t pos1, pos2, start_time;
int test_for_ext_stream_audio, is_dvr_ms_audio=0;
if (s->nb_streams == ASF_MAX_STREAMS) {
av_log(s, AV_LOG_ERROR, "too many streams\n");
return AVERROR(EINVAL);
}
pos1 = url_ftell(pb);
st = av_new_stream(s, 0);
@ -1053,7 +1059,7 @@ static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos,
int64_t pts;
int64_t pos= *ppos;
int i;
int64_t start_pos[s->nb_streams];
int64_t start_pos[ASF_MAX_STREAMS];
for(i=0; i<s->nb_streams; i++){
start_pos[i]= pos;