avcodec/ffv1dec: More completely check micro_version

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
10 years ago · 03baa861ea
parent 3dfbdb328e
commit 03baa861ea
1 changed files with 2 additions and 0 deletions
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@ -528,6 +528,8 @@ static int read_extra_header(FFV1Context *f)
    if (f->version > 2) {
        c->bytestream_end -= 4;
        f->micro_version = get_symbol(c, state, 0);
+        if (f->micro_version < 0)
+            return AVERROR_INVALIDDATA;
    }
    f->ac = f->avctx->coder_type = get_symbol(c, state, 0);
    if (f->ac > 1) {