On 2/15/23 10:04 AM, Kui-Feng Lee wrote:
+ int err;
+
+ map = bpf_map_get(attr->link_create.prog_fd);
bpf_map_get can fail here?
We have already verified the `attach_type` of the link before calling this
function, so an error should not occur. If it does happen, however, something
truly unusual must be happening. To ensure maximum protection and avoid this
issue in the future, I will add a check here as well.
bpf_map_get() could fail. A valid attach_type does not mean prog_fd (actually
map_fd here) is also valid.
