> Why is this not enough? 'key' is scalar, but 'res' which is being written to > is > still a PTR_TO_BTF_ID with PTR_UNTRUSTED.
Ah, right. I was testing against Linus’ master, where that PTR_UNTRUSTED write check is not present, and I missed that it had already been added in bpf-next. That patch is not necessary.
