I have generated on ubuntu with the kernel 4.4.0-57 a key with:openssl req -new -nodes -utf8 -sha256 -days 36500 -batch -x509 -config x509.genkey -outform PEM -out kernel_key.pem -keyout kernel_key.pemand I got from:#cat /proc/keys | grep system_keyring2e2d5e34 I------     1 perm 1f0b0000     0     0 keyring   .system_keyring: 1Therfore, I tried to add the generated key and get the following error:# sudo keyctl padd asymmetric  0x2e2d5e34 <kernel_key.pemadd_key: Permission deniedWhat is wrong by doing so? Do I need to trust my keys by someone and if so, how?
add_key: Permission denied
linux kernel