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Here is the details: > > I have two VMs: > > One has the kernel built against the following commit: > > 0693b27644f04852e46f7f034e3143992b658869 (bpf-next) > > The ksnoop tool (from BCC repo) works well on this VM. > > > Another has the kernel built against the following commit: > > 5319255b8df9271474bc9027cabf82253934f28d (bpf-next) > > On this VM, the ksnoop tool failed with the following message: I see the error in both mentioned bpf-next commits above. I use the latest llvm and bcc from github. Can you confirm which llvm version (or llvm git commit) you are using in both the good and the bad case?