Move UBSan warnings from a blacklist to the source

webrtc/modules/audio_processing/aecm/aecm_core_c.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/modules/audio_processing/aecm/aecm_core.h"
 
 #include <stddef.h>
 #include <stdlib.h>
 
 extern "C" {
 #include "webrtc/common_audio/ring_buffer.h"
 #include "webrtc/common_audio/signal_processing/include/real_fft.h"
 }
 #include "webrtc/modules/audio_processing/aecm/echo_control_mobile.h"
 #include "webrtc/modules/audio_processing/utility/delay_estimator_wrapper.h"
 extern "C" {
 #include "webrtc/system_wrappers/include/cpu_features_wrapper.h"
 }
 
 #include "webrtc/rtc_base/checks.h"
+#include "webrtc/rtc_base/sanitizer.h"
 #include "webrtc/typedefs.h"
 
 // Square root of Hanning window in Q14.
 static const ALIGN8_BEG int16_t WebRtcAecm_kSqrtHanning[] ALIGN8_END = {
   0, 399, 798, 1196, 1594, 1990, 2386, 2780, 3172,
   3562, 3951, 4337, 4720, 5101, 5478, 5853, 6224,
   6591, 6954, 7313, 7668, 8019, 8364, 8705, 9040,
   9370, 9695, 10013, 10326, 10633, 10933, 11227, 11514,
   11795, 12068, 12335, 12594, 12845, 13089, 13325, 13553,
   13773, 13985, 14189, 14384, 14571, 14749, 14918, 15079,
@@ skipping 232 matching lines @@
 
       freq_signal_abs[i] = (uint16_t)tmp32no1;
 #endif // AECM_WITH_ABS_APPROX
     }
     (*freq_signal_sum_abs) += (uint32_t)freq_signal_abs[i];
   }
 
   return time_signal_scaling;
 }
 
-int WebRtcAecm_ProcessBlock(AecmCore* aecm,
-                            const int16_t* farend,
-                            const int16_t* nearendNoisy,
-                            const int16_t* nearendClean,
-                            int16_t* output) {
+int RTC_NO_SANITIZE("signed-integer-overflow")  // bugs.webrtc.org/8200
+WebRtcAecm_ProcessBlock(AecmCore* aecm,
+                        const int16_t* farend,
+                        const int16_t* nearendNoisy,
+                        const int16_t* nearendClean,
+                        int16_t* output) {
   int i;
 
   uint32_t xfaSum;
   uint32_t dfaNoisySum;
   uint32_t dfaCleanSum;
   uint32_t echoEst32Gained;
   uint32_t tmpU32;
 
   int32_t tmp32no1;
 
@@ skipping 152 matching lines @@
   supGain = WebRtcAecm_CalcSuppressionGain(aecm);
 
 
   // Calculate Wiener filter hnl[]
   for (i = 0; i < PART_LEN1; i++)
   {
     // Far end signal through channel estimate in Q8
     // How much can we shift right to preserve resolution
     tmp32no1 = echoEst32[i] - aecm->echoFilt[i];
     aecm->echoFilt[i] += (tmp32no1 * 50) >> 8;
+    // UBSan: 72293096 * 50 cannot be represented in type 'int'
 
     zeros32 = WebRtcSpl_NormW32(aecm->echoFilt[i]) + 1;
     zeros16 = WebRtcSpl_NormW16(supGain) + 1;
     if (zeros32 + zeros16 > 16)
     {
       // Multiplication is safe
       // Result in
       // Q(RESOLUTION_CHANNEL+RESOLUTION_SUPGAIN+
       //   aecm->xfaQDomainBuf[diff])
       echoEst32Gained = WEBRTC_SPL_UMUL_32_16((uint32_t)aecm->echoFilt[i],
@@ skipping 294 matching lines @@
         13);
   }
   uImag[PART_LEN] = 0;
 
   for (i = 0; i < PART_LEN1; i++)
   {
     out[i].real = WebRtcSpl_AddSatW16(out[i].real, uReal[i]);
     out[i].imag = WebRtcSpl_AddSatW16(out[i].imag, uImag[i]);
   }
 }