[issue1233] vc1_decode_init may cause heap corruption

[Karl Blomster]

Karl Blomster <thefl...@uppcon.com> added the comment:

Actually, ok. Removing .7z and adding files separately.

_____________________________________________________
FFmpeg issue tracker <iss...@roundup.ffmpeg.org>
<https://roundup.ffmpeg.org/roundup/ffmpeg/issue1233>
_____________________________________________________
#include <libavformat/avformat.h>
#include <libavcodec/avcodec.h>
#include <libavutil/log.h>
#include <stdio.h>
#include <stdint.h>

int main (void) {
        AVCodec *codec;
        AVCodecContext *cc;
        uint8_t *buf;
        FILE *data;
        long fsz;
        int ret;
        
        av_register_all();
        av_log_set_level(AV_LOG_ERROR);
        cc = avcodec_alloc_context2(CODEC_TYPE_VIDEO);
        codec = avcodec_find_decoder(CODEC_ID_VC1);
        
        data = fopen("extradata.bin", "rb");
        fseek(data, 0, SEEK_END);
        fsz = ftell(data);
        rewind(data);
        buf = malloc(fsz);
        fread(buf, 1, fsz, data);
        cc->extradata = buf;
        cc->extradata_size = fsz;
        fclose(data);
        
        ret = avcodec_open(cc, codec);
        printf("avcodec_open returned: %d\n", ret);
        avcodec_close(cc);
        ret = avcodec_open(cc, codec);
        printf("avcodec_open returned: %d\n", ret);
        avcodec_close(cc);
        
        return 0;
}