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avcodec/mpeg4videodec: Check also for negative versions in the validity check

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 0e7865ce41)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-11-21 03:15:53 +01:00
parent 2de4eb6fec
commit 70dc266342
1 changed files with 1 additions and 1 deletions
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2
libavcodec/mpeg4videodec.c
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@ -2150,7 +2150,7 @@ 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",