Hi Kartikeya, sorry if i wasn't clear in my first message but just to be sure we have no misunderstandings :) .BTF sections work on s390x with linux-next and nf_conntrack as well if the corresponding .BTF section is a part of the kernel module itself. I tested it myself by building a linux-next kernel and testing it with a KVM guest, i'm able to load nf_conntrack and it works. In contrast, in the case where the corresponding .BTF section is separate from the kernel module nf_conntrack, it fails with the message i provided in the first email. Therefore, my question is, does BTF for kernel modules work if the corresponding BTF section is NOT a part of the kernel module but instead is stored within the corresponding debuginfo file /usr/lib/debug/lib/modules/*/kernel/net/netfilter/nf_conntrack.ko.debug ? Thanks Regards Alex