Hi you all, I'm trying to build the linux kernel following the guide on kernelnewbies, is there anybody who can help me to figure out what the following error is pointing to? CALL scripts/checksyscalls.sh DESCEND objtool INSTALL libsubcmd_headers DESCEND bpf/resolve_btfids INSTALL libsubcmd_headers CC security/apparmor/net.o security/apparmor/net.c: In function ‘audit_net_cb’: security/apparmor/net.c:81:13: error: ‘sock_type_names’ undeclared (first use in this function) 81 | if (sock_type_names[aad(sa)->net.type]) | ^~~~~~~~~~~~~~~ security/apparmor/net.c:81:13: note: each undeclared identifier is reported only once for each function it appears in make[4]: *** [scripts/Makefile.build:243: security/apparmor/net.o] Error 1 make[3]: *** [scripts/Makefile.build:477: security/apparmor] Error 2 make[2]: *** [scripts/Makefile.build:477: security] Error 2 make[1]: *** [/home/user/Desktop/kernel/git/kernels/staging/Makefile:2020: .] Error 2 make: *** [Makefile:234: __sub-make] Error 2 I'm running on Ubuntu 22.04 thank you in advance, Luigi