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Prevent out of bounds accesses in lppTransposer() and lppTransposerHBE() 

Bug: 112160868
Test: see poc in bug
Change-Id: I6a2161865d9cb9b51dc37c09d6e3a4a8e5d11f86
This commit is contained in:
Fraunhofer IIS FDK 2018-09-10 16:39:30 +02:00 committed by Jean-Michel Trivi
parent 42f714f2ab
commit 4dad829df0
2 changed files with 50 additions and 27 deletions
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3
Android.bp
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@ -27,6 +27,9 @@ cc_library_static {
misc_undefined:["unsigned-integer-overflow", "signed-integer-overflow"],
cfi: true,
},
shared_libs: [
"liblog",
],
export_include_dirs: [
"libAACdec/include",
"libAACenc/include",

74
libSBRdec/src/lpp_tran.cpp
View File

@ -118,6 +118,10 @@ amm-info@iis.fraunhofer.de
\sa lppTransposer(), main_audio.cpp, sbr_scale.h, \ref documentationOverview
*/
#ifdef __ANDROID__
#include "log/log.h"
#endif
#include "lpp_tran.h"
#include "sbr_ram.h"
@ -295,7 +299,6 @@ void lppTransposer(
int ovLowBandShift;
int lowBandShift;
/* int ovHighBandShift;*/
int targetStopBand;
alphai[0] = FL2FXCONST_SGL(0.0f);
alphai[1] = FL2FXCONST_SGL(0.0f);
@ -311,25 +314,34 @@ void lppTransposer(
autoCorrLength = pSettings->nCols + pSettings->overlap;
/* Set upper subbands to zero:
This is required in case that the patches do not cover the complete
highband (because the last patch would be too short). Possible
optimization: Clearing bands up to usb would be sufficient here. */
targetStopBand = patchParam[pSettings->noOfPatches - 1].targetStartBand +
patchParam[pSettings->noOfPatches - 1].numBandsInPatch;
if (pSettings->noOfPatches > 0) {
/* Set upper subbands to zero:
This is required in case that the patches do not cover the complete
highband (because the last patch would be too short). Possible
optimization: Clearing bands up to usb would be sufficient here. */
int targetStopBand =
patchParam[pSettings->noOfPatches - 1].targetStartBand +
patchParam[pSettings->noOfPatches - 1].numBandsInPatch;
int memSize = ((64) - targetStopBand) * sizeof(FIXP_DBL);
int memSize = ((64) - targetStopBand) * sizeof(FIXP_DBL);
if (!useLP) {
for (i = startSample; i < stopSampleClear; i++) {
FDKmemclear(&qmfBufferReal[i][targetStopBand], memSize);
FDKmemclear(&qmfBufferImag[i][targetStopBand], memSize);
}
} else {
for (i = startSample; i < stopSampleClear; i++) {
FDKmemclear(&qmfBufferReal[i][targetStopBand], memSize);
if (!useLP) {
for (i = startSample; i < stopSampleClear; i++) {
FDKmemclear(&qmfBufferReal[i][targetStopBand], memSize);
FDKmemclear(&qmfBufferImag[i][targetStopBand], memSize);
}
} else {
for (i = startSample; i < stopSampleClear; i++) {
FDKmemclear(&qmfBufferReal[i][targetStopBand], memSize);
}
}
}
#ifdef __ANDROID__
else {
// Safetynet logging
android_errorWriteLog(0x534e4554, "112160868");
}
#endif
/* init bwIndex for each patch */
FDKmemclear(bwIndex, sizeof(bwIndex));
@ -874,7 +886,6 @@ void lppTransposerHBE(
int ovLowBandShift;
int lowBandShift;
/* int ovHighBandShift;*/
int targetStopBand;
alphai[0] = FL2FXCONST_SGL(0.0f);
alphai[1] = FL2FXCONST_SGL(0.0f);
@ -889,19 +900,28 @@ void lppTransposerHBE(
autoCorrLength = pSettings->nCols + pSettings->overlap;
/* Set upper subbands to zero:
This is required in case that the patches do not cover the complete
highband (because the last patch would be too short). Possible
optimization: Clearing bands up to usb would be sufficient here. */
targetStopBand = patchParam[pSettings->noOfPatches - 1].targetStartBand +
patchParam[pSettings->noOfPatches - 1].numBandsInPatch;
if (pSettings->noOfPatches > 0) {
/* Set upper subbands to zero:
This is required in case that the patches do not cover the complete
highband (because the last patch would be too short). Possible
optimization: Clearing bands up to usb would be sufficient here. */
int targetStopBand =
patchParam[pSettings->noOfPatches - 1].targetStartBand +
patchParam[pSettings->noOfPatches - 1].numBandsInPatch;
int memSize = ((64) - targetStopBand) * sizeof(FIXP_DBL);
int memSize = ((64) - targetStopBand) * sizeof(FIXP_DBL);
for (i = startSample; i < stopSampleClear; i++) {
FDKmemclear(&qmfBufferReal[i][targetStopBand], memSize);
FDKmemclear(&qmfBufferImag[i][targetStopBand], memSize);
for (i = startSample; i < stopSampleClear; i++) {
FDKmemclear(&qmfBufferReal[i][targetStopBand], memSize);
FDKmemclear(&qmfBufferImag[i][targetStopBand], memSize);
}
}
#ifdef __ANDROID__
else {
// Safetynet logging
android_errorWriteLog(0x534e4554, "112160868");
}
#endif
/*
Calc common low band scale factor