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asfdec: fix reading files larger than 2GB 

avio_skip returns file position and overflows int
This commit is contained in:
John Stebbins 2017-02-23 16:47:58 -07:00
parent 248dc5c164
commit cd7a2e1502
1 changed files with 5 additions and 4 deletions
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9
libavformat/asfdec.c
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@ -976,7 +976,8 @@ static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
uint32_t pkt_num, nb_entries;
int32_t prev_pkt_num = -1;
int i, ret;
int i;
int64_t offset;
uint64_t size = avio_rl64(pb);
// simple index objects should be ordered by stream number, this loop tries to find
@ -998,10 +999,10 @@ static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
nb_entries = avio_rl32(pb);
for (i = 0; i < nb_entries; i++) {
pkt_num = avio_rl32(pb);
ret = avio_skip(pb, 2);
if (ret < 0) {
offset = avio_skip(pb, 2);
if (offset < 0) {
av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
return ret;
return offset;
}
if (prev_pkt_num != pkt_num) {
av_add_index_entry(st, asf->first_packet_offset + asf->packet_size *