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avcodec/indeo3: ensure offsets are non negative

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-12-18 18:57:27 +01:00
parent 19ecd675c5
commit 368642361f
1 changed files with 2 additions and 1 deletions
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3
libavcodec/indeo3.c
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@ -982,7 +982,8 @@ static int decode_frame_headers(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
ctx->y_data_size = ends[0] - starts[0];
ctx->v_data_size = ends[1] - starts[1];
ctx->u_data_size = ends[2] - starts[2];
if (FFMAX3(y_offset, v_offset, u_offset) >= ctx->data_size - 16 ||
if (FFMIN3(y_offset, v_offset, u_offset) < 0 ||
FFMAX3(y_offset, v_offset, u_offset) >= ctx->data_size - 16 ||
FFMIN3(y_offset, v_offset, u_offset) < gb.buffer - bs_hdr + 16 ||
FFMIN3(ctx->y_data_size, ctx->v_data_size, ctx->u_data_size) <= 0) {
av_log(avctx, AV_LOG_ERROR, "One of the y/u/v offsets is invalid\n");