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Commit ea8d38e7 authored by TreeHugger Robot's avatar TreeHugger Robot Committed by Android (Google) Code Review
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Merge "Fail explicitly on length overflow." into oc-dev

parents 4048e499 4d143036

libutils/FileMap.cpp

+4 −0
Original line number Diff line number Diff line
@@ -182,6 +182,10 @@ bool FileMap::create(const char* origFileName, int fd, off64_t offset, size_t le 
    adjust = offset % mPageSize;

    adjOffset = offset - adjust;

    adjLength = length + adjust;

    if (__builtin_add_overflow(length, adjust, &adjLength)) {

        ALOGE("adjusted length overflow: length %zu adjust %d", length, adjust);

        return false;

    }



    flags = MAP_SHARED;

    prot = PROT_READ;