bpf: Clobber stack slot when writing over spilled PTRTOBTF_ID
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v6.0.16 by commit 9ca60194a5b5402685f19b507d899802e1bf38f2, it was introduced in version v5.8 by commit 1d68f22b3d53d368d5cc8d09de890250cae5c945. For more details please see the references link.