segafilm: Error out on impossible packet size

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org

segafilm: Error out on impossible packet size
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org
5268bd29 · Luca Barbato · 3562684d · 5268bd29
Commit 5268bd29 authored Aug 13, 2013 by Luca Barbato
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segafilm.c libavformat/segafilm.c +2 -0

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--- a/libavformat/segafilm.c
+++ b/libavformat/segafilm.c
@@ -214,6 +214,8 @@ static int film_read_header(AVFormatContext *s)
        film->sample_table[i].sample_offset =
            data_offset + AV_RB32(&scratch[0]);
        film->sample_table[i].sample_size = AV_RB32(&scratch[4]);
+        if (film->sample_table[i].sample_size > INT_MAX / 4)
+            return AVERROR_INVALIDDATA;
        if (AV_RB32(&scratch[8]) == 0xFFFFFFFF) {
            film->sample_table[i].stream = film->audio_stream_index;
            film->sample_table[i].pts = audio_frame_counter;