Bpftrace: undefined symbol: bpf_detach_kfunc @ Fedora32

[hermithuang]

bpftrace can't execute @ Fedora32

$ bpftrace
bpftrace: symbol lookup error: bpftrace: undefined symbol: bpf_detach_kfunc
$ uname -a
Linux home 5.6.19-300.fc32.x86_64 #1 SMP Wed Jun 17 16:10:48 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
$ rpm -qi bpftrace
Name : bpftrace
Version : 0.10.0
Release : 2.fc32
Architecture: x86_64
Install Date: 2020/05/30 Sat 11:28:56
Group : Unspecified
Size : 4074406
License : ASL 2.0
Signature : RSA/SHA256, 2020/05/20 Wed 06:23:36, Key ID 6c13026d12c944d0
Source RPM : bpftrace-0.10.0-2.fc32.src.rpm
Build Date : 2020/05/20 Wed 06:14:20
Build Host : buildvm-06.phx2.fedoraproject.org
Packager : Fedora Project
Vendor : Fedora Project
URL : https://github.com/iovisor/bpftrace
Bug URL : https://bugz.fedoraproject.org/bpftrace
Summary : High-level tracing language for Linux eBPF
Description :
BPFtrace is a high-level tracing language for Linux enhanced Berkeley Packet
Filter (eBPF) available in recent Linux kernels (4.x). BPFtrace uses LLVM as a
backend to compile scripts to BPF-bytecode and makes use of BCC for
interacting with the Linux BPF system, as well as existing Linux tracing
capabilities: kernel dynamic tracing (kprobes), user-level dynamic tracing
(uprobes), and tracepoints. The BPFtrace language is inspired by awk and C,
and predecessor tracers such as DTrace and SystemTap

[caringi]

This problem has been caused by an update in the bcc package (bcc-0.15.0-1.fc32.x86_64).

The latest update (bcc-0.15.0-2.fc32.x86_64), which is still in "testing", fixes it:

https://bodhi.fedoraproject.org/updates/FEDORA-2020-2406f3a6c5

You can force the installation of this update with the following command:

sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-2406f3a6c5

[hermithuang]

thank you @caringi . it works !