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Fix potential decrypt src pointer overflow. am: c14f262876 am: 107233b3dd

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Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/13472562

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I000cf080faddadcf8773f84f7fd3a44d3edd7164
This commit is contained in:
Edwin Wong
2021-02-03 23:32:35 +00:00
committed by Automerger Merge Worker
parent e42109b559 107233b3dd
commit e289b4aa83
1 changed files with 5 additions and 1 deletions
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6
drm/1.0/default/CryptoPlugin.cpp
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@@ -124,7 +124,11 @@ namespace implementation {
return Void();
}
if (source.offset + offset + source.size > sourceBase->getSize()) {
size_t totalSize = 0;
if (__builtin_add_overflow(source.offset, offset, &totalSize) ||
__builtin_add_overflow(totalSize, source.size, &totalSize) ||
totalSize > sourceBase->getSize()) {
android_errorWriteLog(0x534e4554, "176496160");
_hidl_cb(Status::ERROR_DRM_CANNOT_HANDLE, 0, "invalid buffer size");
return Void();
}