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https://github.com/Divested-Mobile/DivestOS-Build.git
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122 lines
5.9 KiB
Diff
122 lines
5.9 KiB
Diff
From f9b598c828134f60235b6ec13b3e2cc292d0a64d Mon Sep 17 00:00:00 2001
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From: Ray Essick <essick@google.com>
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Date: Wed, 14 Feb 2024 11:10:41 -0600
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Subject: [PATCH] fix buffer overrun in eas_wtengine
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avoid a buffer overrun in eas_wtengine.
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Check buffer limits during application of gain
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Clip calculated length in eas_wtsynth
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Bug: 317780080
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Test: POC with bug
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(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:6b66e7665dbcd891ff23081c13ab0b1637bb1dda)
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backporting fix from main
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(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:5d93ba096d54c157d106559c045d46357e51d158)
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Merged-In: I3609d6a36d89b26ae7eb3ae84cbe7772f6c3bee0
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Change-Id: I3609d6a36d89b26ae7eb3ae84cbe7772f6c3bee0
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---
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arm-wt-22k/lib_src/eas_wtengine.c | 24 ++++++++++++++++++++++++
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arm-wt-22k/lib_src/eas_wtsynth.c | 12 +++++++++++-
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2 files changed, 35 insertions(+), 1 deletion(-)
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diff --git a/arm-wt-22k/lib_src/eas_wtengine.c b/arm-wt-22k/lib_src/eas_wtengine.c
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index b1ee749..dc8d864 100644
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--- a/arm-wt-22k/lib_src/eas_wtengine.c
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+++ b/arm-wt-22k/lib_src/eas_wtengine.c
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@@ -99,6 +99,10 @@ void WT_VoiceGain (S_WT_VOICE *pWTVoice, S_WT_INT_FRAME *pWTIntFrame)
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ALOGE("b/26366256");
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android_errorWriteLog(0x534e4554, "26366256");
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return;
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+ } else if (numSamples > BUFFER_SIZE_IN_MONO_SAMPLES) {
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+ ALOGE("b/317780080 clip numSamples %ld -> %d", numSamples, BUFFER_SIZE_IN_MONO_SAMPLES);
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+ android_errorWriteLog(0x534e4554, "317780080");
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+ numSamples = BUFFER_SIZE_IN_MONO_SAMPLES;
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}
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pMixBuffer = pWTIntFrame->pMixBuffer;
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pInputBuffer = pWTIntFrame->pAudioBuffer;
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@@ -196,6 +200,10 @@ void WT_Interpolate (S_WT_VOICE *pWTVoice, S_WT_INT_FRAME *pWTIntFrame)
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ALOGE("b/26366256");
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android_errorWriteLog(0x534e4554, "26366256");
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return;
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+ } else if (numSamples > BUFFER_SIZE_IN_MONO_SAMPLES) {
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+ ALOGE("b/317780080 clip numSamples %ld -> %d", numSamples, BUFFER_SIZE_IN_MONO_SAMPLES);
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+ android_errorWriteLog(0x534e4554, "317780080");
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+ numSamples = BUFFER_SIZE_IN_MONO_SAMPLES;
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}
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pOutputBuffer = pWTIntFrame->pAudioBuffer;
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@@ -297,6 +305,10 @@ void WT_InterpolateNoLoop (S_WT_VOICE *pWTVoice, S_WT_INT_FRAME *pWTIntFrame)
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ALOGE("b/26366256");
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android_errorWriteLog(0x534e4554, "26366256");
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return;
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+ } else if (numSamples > BUFFER_SIZE_IN_MONO_SAMPLES) {
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+ ALOGE("b/317780080 clip numSamples %ld -> %d", numSamples, BUFFER_SIZE_IN_MONO_SAMPLES);
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+ android_errorWriteLog(0x534e4554, "317780080");
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+ numSamples = BUFFER_SIZE_IN_MONO_SAMPLES;
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}
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pOutputBuffer = pWTIntFrame->pAudioBuffer;
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@@ -397,6 +409,10 @@ void WT_VoiceFilter (S_FILTER_CONTROL *pFilter, S_WT_INT_FRAME *pWTIntFrame)
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ALOGE("b/26366256");
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android_errorWriteLog(0x534e4554, "26366256");
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return;
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+ } else if (numSamples > BUFFER_SIZE_IN_MONO_SAMPLES) {
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+ ALOGE("b/317780080 clip numSamples %ld -> %d", numSamples, BUFFER_SIZE_IN_MONO_SAMPLES);
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+ android_errorWriteLog(0x534e4554, "317780080");
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+ numSamples = BUFFER_SIZE_IN_MONO_SAMPLES;
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}
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pAudioBuffer = pWTIntFrame->pAudioBuffer;
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@@ -465,6 +481,10 @@ void WT_VoiceFilter (S_FILTER_CONTROL *pFilter, S_WT_INT_FRAME *pWTIntFrame)
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ALOGE("b/26366256");
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android_errorWriteLog(0x534e4554, "26366256");
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return;
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+ } else if (numSamples > BUFFER_SIZE_IN_MONO_SAMPLES) {
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+ ALOGE("b/317780080 clip numSamples %ld -> %d", numSamples, BUFFER_SIZE_IN_MONO_SAMPLES);
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+ android_errorWriteLog(0x534e4554, "317780080");
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+ numSamples = BUFFER_SIZE_IN_MONO_SAMPLES;
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}
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pOutputBuffer = pWTIntFrame->pAudioBuffer;
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phaseInc = pWTIntFrame->frame.phaseIncrement;
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@@ -613,6 +633,10 @@ void WT_InterpolateMono (S_WT_VOICE *pWTVoice, S_WT_INT_FRAME *pWTIntFrame)
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ALOGE("b/26366256");
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android_errorWriteLog(0x534e4554, "26366256");
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return;
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+ } else if (numSamples > BUFFER_SIZE_IN_MONO_SAMPLES) {
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+ ALOGE("b/317780080 clip numSamples %ld -> %d", numSamples, BUFFER_SIZE_IN_MONO_SAMPLES);
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+ android_errorWriteLog(0x534e4554, "317780080");
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+ numSamples = BUFFER_SIZE_IN_MONO_SAMPLES;
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}
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pMixBuffer = pWTIntFrame->pMixBuffer;
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diff --git a/arm-wt-22k/lib_src/eas_wtsynth.c b/arm-wt-22k/lib_src/eas_wtsynth.c
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index 74f78f5..ea1fe78 100644
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--- a/arm-wt-22k/lib_src/eas_wtsynth.c
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+++ b/arm-wt-22k/lib_src/eas_wtsynth.c
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@@ -484,7 +484,12 @@ EAS_BOOL WT_CheckSampleEnd (S_WT_VOICE *pWTVoice, S_WT_INT_FRAME *pWTIntFrame, E
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/*lint -e{703} use shift for performance */
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numSamples = (numSamples << NUM_PHASE_FRAC_BITS) - (EAS_I32) pWTVoice->phaseFrac;
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if (pWTIntFrame->frame.phaseIncrement) {
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- pWTIntFrame->numSamples = 1 + (numSamples / pWTIntFrame->frame.phaseIncrement);
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+ EAS_I32 oldMethod = 1 + (numSamples / pWTIntFrame->frame.phaseIncrement);
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+ pWTIntFrame->numSamples =
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+ (numSamples + pWTIntFrame->frame.phaseIncrement - 1) / pWTIntFrame->frame.phaseIncrement;
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+ if (oldMethod != pWTIntFrame->numSamples) {
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+ ALOGE("b/317780080 old %ld new %ld", oldMethod, pWTIntFrame->numSamples);
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+ }
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} else {
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pWTIntFrame->numSamples = numSamples;
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}
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@@ -492,6 +497,11 @@ EAS_BOOL WT_CheckSampleEnd (S_WT_VOICE *pWTVoice, S_WT_INT_FRAME *pWTIntFrame, E
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ALOGE("b/26366256");
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android_errorWriteLog(0x534e4554, "26366256");
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pWTIntFrame->numSamples = 0;
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+ } else if (pWTIntFrame->numSamples > BUFFER_SIZE_IN_MONO_SAMPLES) {
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+ ALOGE("b/317780080 clip numSamples %ld -> %d",
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+ pWTIntFrame->numSamples, BUFFER_SIZE_IN_MONO_SAMPLES);
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+ android_errorWriteLog(0x534e4554, "317780080");
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+ pWTIntFrame->numSamples = BUFFER_SIZE_IN_MONO_SAMPLES;
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}
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/* sound will be done this frame */
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