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45 lines
1.1 KiB
45 lines
1.1 KiB
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "media/ShmemUtil.h"
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namespace android {
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namespace media {
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bool validateSharedFileRegion(const SharedFileRegion& shmem) {
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// FD must be valid.
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if (shmem.fd.get() < 0) {
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return false;
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}
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// Size and offset must be non-negative.
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if (shmem.size < 0 || shmem.offset < 0) {
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return false;
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}
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uint64_t size = shmem.size;
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uint64_t offset = shmem.offset;
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// Must not wrap.
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if (offset > offset + size) {
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return false;
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}
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return true;
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}
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} // namespace media
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} // namespace android
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