avidec: Fix use of stream_index before validation of its range.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
13 years ago · 14d94a1952
parent d150a147da
commit 14d94a1952
1 changed files with 1 additions and 2 deletions
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@ -699,8 +699,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
            }
            break;
        case MKTAG('s', 't', 'r', 'd'):
-            st = s->streams[stream_index];
-            if (stream_index >= (unsigned)s->nb_streams || st->codec->extradata_size) {
+            if (stream_index >= (unsigned)s->nb_streams || s->streams[stream_index]->codec->extradata_size) {
                avio_skip(pb, size);
            } else {
                uint64_t cur_pos = avio_tell(pb);