avcodec/mpeg4videodec: Check also for negative versions in the validity check
authorMichael Niedermayer <michael@niedermayer.cc>
Tue, 21 Nov 2017 02:15:53 +0000 (03:15 +0100)
committerMichael Niedermayer <michael@niedermayer.cc>
Tue, 21 Nov 2017 20:24:47 +0000 (21:24 +0100)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 0e7865ce4152f8b04cda6a698bbee4fd4a94009d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/mpeg4videodec.c

index 410dbbf..d9d5e27 100644 (file)
@@ -2137,7 +2137,7 @@ static int decode_user_data(Mpeg4DecContext *ctx, GetBitContext *gb)
     if (e != 4) {
         e = sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3) + 1;
         if (e > 1) {
-            if (ver > 0xFF || ver2 > 0xFF || ver3 > 0xFF) {
+            if (ver > 0xFFU || ver2 > 0xFFU || ver3 > 0xFFU) {
                 av_log(s->avctx, AV_LOG_WARNING,
                      "Unknown Lavc version string encountered, %d.%d.%d; "
                      "clamping sub-version values to 8-bits.\n",