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[RESTRICT AUTOMERGE] Fix potential decrypt destPtr overflow. am: 68b5b00567

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Original change: https://googleplex-android-review.googlesource.com/c/platform/vendor/widevine/+/14238895

Change-Id: I3078fc60223d3cfc7454deddbec3bbbd83cc155e
This commit is contained in:
Edwin Wong
2021-04-21 23:49:55 +00:00
committed by Automerger Merge Worker
parent b8c670a32f 68b5b00567
commit deece4f746
1 changed files with 4 additions and 1 deletions
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5
libwvdrmengine/mediacrypto/src_hidl/WVCryptoPlugin.cpp
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@@ -233,7 +233,10 @@ Return<void> WVCryptoPlugin::decrypt_1_2(
return Void();
}
if (destBuffer.offset + destBuffer.size > destBase->getSize()) {
size_t totalDstSize = 0;
if (__builtin_add_overflow(destBuffer.offset, destBuffer.size, &totalDstSize) ||
totalDstSize > destBase->getSize()) {
android_errorWriteLog(0x534e4554, "176444622");
_hidl_cb(Status_V1_2::ERROR_DRM_FRAME_TOO_LARGE, 0, "invalid buffer size");
return Void();
}