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Commit 7afadbef authored by Steven Moreland's avatar Steven Moreland Committed by Automerger Merge Worker
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Merge "libbinder: Parcel: validate read data before write" into tm-dev am:... 

Merge "libbinder: Parcel: validate read data before write" into tm-dev am: fde1dbbf am: c1b87462 am: f404eba6 am: 87534f02

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/30026349



Change-Id: I4a26f0c9473d1ef1d663edbb660e973a813ef61a
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents f8115f8b 87534f02

libs/binder/Parcel.cpp

+12 −0
Original line number Diff line number Diff line
@@ -1090,6 +1090,10 @@ 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
@@ -1648,6 +1652,10 @@ status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 
    const bool enoughObjects = kernelFields->mObjectsSize < kernelFields->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
@@ -1889,6 +1897,10 @@ 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;

        }



        memcpy(mData + mDataPos, &val, sizeof(val));

        return finishWrite(sizeof(val));

    }