In km_compute_shared_hmac of km4.c, there is a possible out of bounds write due to improper input validation. This could lead to local esca…

In km_compute_shared_hmac of km4.c, there is a possible out of bounds write due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-130246677