From e95233789c08f55c0b2d0657bada609629a59294 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 2 Jun 2012 23:43:31 +0200 Subject: [PATCH] mpc7: fix handling of last frame Fixes heap buffer overflow Fixes ticket1393 Found-by: Piotr Bandurski Signed-off-by: Michael Niedermayer --- libavcodec/mpc7.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavcodec/mpc7.c b/libavcodec/mpc7.c index 14abff470d..0a4582635f 100644 --- a/libavcodec/mpc7.c +++ b/libavcodec/mpc7.c @@ -228,7 +228,7 @@ static int mpc7_decode_frame(AVCodecContext * avctx, void *data, buf_size -= 4; /* get output buffer */ - c->frame.nb_samples = last_frame ? c->lastframelen : MPC_FRAME_SIZE; + c->frame.nb_samples = MPC_FRAME_SIZE; if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); return ret; @@ -298,6 +298,8 @@ static int mpc7_decode_frame(AVCodecContext * avctx, void *data, idx_to_quant(c, &gb, bands[i].res[ch], c->Q[ch] + off); ff_mpc_dequantize_and_synth(c, mb, c->frame.data[0], 2); + if(last_frame) + c->frame.nb_samples = c->lastframelen; bits_used = get_bits_count(&gb); bits_avail = buf_size * 8;