Commit 31fce399 authored by Michael Niedermayer's avatar Michael Niedermayer

tm2: check for invalid vlcs, fix out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent c6945228
......@@ -200,6 +200,8 @@ static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
{
int val;
val = get_vlc2(gb, code->vlc.table, code->bits, 1);
if(val<0)
return -1;
return code->recode[val];
}
......@@ -325,7 +327,7 @@ static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, i
return AVERROR_INVALIDDATA;
}
ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) {
av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
ctx->tokens[stream_id][i], stream_id, i);
return AVERROR_INVALIDDATA;
......
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