Linux Kernel 5.7.9 DRM Double Free

["zdi-disclosures () trendmicro com" <zdi-disclosures () trendmicro com>]

The specific flaw exists within DRM memory management. The issue results from the lack of validating the existence of 
an object prior to performing operations on the object. An attacker can leverage this vulnerability to escalate 
privileges and execute code in the context of the kernel.

This has been already addressed in the upstream commit 5de5b6ecf97a021f29403aa272cb4e03318ef586
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