Facing same issue and had gone through multiple session with pathetic apple support. They don't even know why this OS extension is causing panic. Instead of providing a solution, they recommended me to trade in iMac and buy new one. No wonder their profits are sky rocketing.
Kernel Extensions in backtrace:
com.apple.iokit.IOGraphicsFamily(593.0)[A327B1FD-1BF3-3D02-A4E5-20A37ED0493E]@0xffffff7fae5ab000->0xffffff7fae5d9fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[023CD3FF-4EFC-3455-89C2-FF8BD98013EB]@0xffffff8017fe6000->0xffffff8018010fff
sktrust1
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