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hls: disallow opening nested files in child demuxers

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This commit is contained in:
Anton Khirnov 2016-02-15 14:47:33 +01:00
parent e192cd9ce2
commit 225e84e745
1 changed files with 11 additions and 0 deletions
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11
libavformat/hls.c
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@ -494,6 +494,16 @@ static int save_avio_options(AVFormatContext *s)
return ret;
}
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
int flags, AVDictionary **opts)
{
av_log(s, AV_LOG_ERROR,
"A HLS playlist item '%s' referred to an external file '%s'. "
"Opening this file was forbidden for security reasons\n",
s->filename, url);
return AVERROR(EPERM);
}
static int hls_read_header(AVFormatContext *s)
{
HLSContext *c = s->priv_data;
@ -579,6 +589,7 @@ static int hls_read_header(AVFormatContext *s)
goto fail;
}
v->ctx->pb = &v->pb;
v->ctx->io_open = nested_io_open;
v->stream_offset = stream_offset;
ret = avformat_open_input(&v->ctx, v->segments[0]->url, in_fmt, NULL);
if (ret < 0)