Integer overflow

Possible integer overflow happens when mmap find function will increment refcount every time when it invokes and can lead to use after free issue in Snapdragon Auto, Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wearables in APQ8009, APQ8053, MDM9607, MDM9640, MSM8909W, MSM8917, MSM8953, Nicobar, QCS605, QM215, SDA845, SDM429, SDM429W, SDM439, SDM450, SDM632, SDM660, SDM670, SDM710, SDM845, SDX24, SDX55, SM6150, SM8150, SM8250, SXR1130, SXR2130