X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fwmavoice.c;h=85c80ecca85e4ff27503aafe1befa7562dea3ba2;hb=9f6a06d9271a11781717fd0b134db2bcd716508e;hp=68bb65986e38d0773c55c2e617f5937db43c6c82;hpb=f05f210526a3dc2d9fa6b1c228e3907ebd1d43c6;p=ffmpeg

diff --git a/libavcodec/wmavoice.c b/libavcodec/wmavoice.c
index 68bb65986e3..85c80ecca85 100644
--- a/libavcodec/wmavoice.c
+++ b/libavcodec/wmavoice.c
@@ -433,6 +433,9 @@ static av_cold int wmavoice_decode_init(AVCodecContext *ctx)
         return AVERROR_INVALIDDATA;
     }
 
+    if (ctx->sample_rate >= INT_MAX / (256 * 37))
+        return AVERROR_INVALIDDATA;
+
     s->min_pitch_val    = ((ctx->sample_rate << 8)      /  400 + 50) >> 8;
     s->max_pitch_val    = ((ctx->sample_rate << 8) * 37 / 2000 + 50) >> 8;
     pitch_range         = s->max_pitch_val - s->min_pitch_val;
@@ -1520,7 +1523,7 @@ static int synth_frame(AVCodecContext *ctx, GetBitContext *gb, int frame_idx,
 
         /* "pitch-diff-per-sample" for calculation of pitch per sample */
         s->pitch_diff_sh16 =
-            ((cur_pitch_val - s->last_pitch_val) << 16) / MAX_FRAMESIZE;
+            (cur_pitch_val - s->last_pitch_val) * (1 << 16) / MAX_FRAMESIZE;
     }
 
     /* Global gain (if silence) and pitch-adaptive window coordinates */
@@ -1840,6 +1843,9 @@ static int parse_packet_header(WMAVoiceContext *s)
     skip_bits(gb, 4);          // packet sequence number
     s->has_residual_lsps = get_bits1(gb);
     do {
+        if (get_bits_left(gb) < 6 + s->spillover_bitsize)
+            return AVERROR_INVALIDDATA;
+
         res = get_bits(gb, 6); // number of superframes per packet
                                // (minus first one if there is spillover)
         n_superframes += res;
@@ -1998,5 +2004,6 @@ AVCodec ff_wmavoice_decoder = {
     .close            = wmavoice_decode_end,
     .decode           = wmavoice_decode_packet,
     .capabilities     = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
+    .caps_internal    = FF_CODEC_CAP_INIT_CLEANUP,
     .flush            = wmavoice_flush,
 };