CVE-2023-53585 bpf: reject unhashed sockets in bpf_sk_assign

In the Linux kernel, the following vulnerability has been resolved: bpf: reject unhashed sockets in bpfskassign The semantics for bpfskassign are as follows: sk = somelookupfunc bpfskassignskb, sk bpfskreleasesk That is, the sk is not consumed by bpfskassign. The function therefore needs to make...