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Commit f0d7060b authored by Steven Moreland's avatar Steven Moreland Committed by Automerger Merge Worker
Browse files

Merge "libbinder: Parcel: validate read data before write" into sc-dev am: 538e27fa 

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/30026350



Change-Id: I187d80a81cbf5b75a98bf1c0f8d4144d136cdb6c
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents f746471c 538e27fa

libs/binder/Parcel.cpp

+12 −0
Original line number Diff line number Diff line
@@ -796,6 +796,10 @@ restart_write: 
        //printf("Writing %ld bytes, padded to %ld\n", len, padded);

        uint8_t* const data = mData+mDataPos;



        if (status_t status = validateReadData(mDataPos + padded); status != OK) {

            return nullptr; // drops status

        }



        // Need to pad at end?

        if (padded != len) {

#if BYTE_ORDER == BIG_ENDIAN
@@ -1313,6 +1317,10 @@ status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 
    const bool enoughObjects = mObjectsSize < mObjectsCapacity;

    if (enoughData && enoughObjects) {

restart_write:

        if (status_t status = validateReadData(mDataPos + sizeof(val)); status != OK) {

            return status;

        }



        *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val;



        // remember if it's a file descriptor
@@ -1505,6 +1513,10 @@ status_t Parcel::writeAligned(T val) { 


    if ((mDataPos+sizeof(val)) <= mDataCapacity) {

restart_write:

        if (status_t status = validateReadData(mDataPos + sizeof(val)); status != OK) {

            return status;

        }



        *reinterpret_cast<T*>(mData+mDataPos) = val;

        return finishWrite(sizeof(val));

    }