avcodec/ffv1dec: Explicitly check read_quant_table() return value

Forwards the error code, avoids potential integer overflow

Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit 10bbf6cf622f8a954c6cc694ca07c24f989c99af)

Signed-off-by: Michael Niedermayer <[email protected]>

1 files changed, 4 insertions, 1 deletions

diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index f89776d301..61915057df 100644
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -503,7 +503,10 @@ static int read_quant_tables(RangeCoder *c,
     int context_count = 1;
 
     for (i = 0; i < 5; i++) {
-        context_count *= read_quant_table(c, quant_table[i], context_count);
+        int ret = read_quant_table(c, quant_table[i], context_count);
+        if (ret < 0)
+            return ret;
+        context_count *= ret;
         if (context_count > 32768U) {
             return AVERROR_INVALIDDATA;
         }