linux-kernel - [libbpf] dd4436bb83: kernel_selftests.bpf.test_section

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Date:   Sun, 27 Oct 2019 13:20:42 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Andrii Nakryiko <andriin@...com>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...ts.01.org,
        bpf@...r.kernel.org
Subject: [libbpf]  dd4436bb83: kernel_selftests.bpf.test_section_names.fail

FYI, we noticed the following commit (built with gcc-7):

commit: dd4436bb838338cfda253d7f012610a73e4078fd ("libbpf: Teach bpf_object__open to guess program types")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: kernel_selftests
with following parameters:

	group: kselftests-00

test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel.
test-url: https://www.kernel.org/doc/Documentation/kselftest.txt


on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>


# selftests: bpf: test_section_names
# libbpf: failed to guess program type based on ELF section name 'InvAliD'
# libbpf: supported section(type) names are: socket kprobe/ uprobe/ kretprobe/ uretprobe/ classifier action tracepoint/ tp/ raw_tracepoint/ raw_tp/ tp_btf/ xdp perf_event lwt_in lwt_out lwt_xmit lwt_seg6local cgroup_skb/ingress cgroup_skb/egress cgroup/skb cgroup/sock cgroup/post_bind4 cgroup/post_bind6 cgroup/dev sockops sk_skb/stream_parser sk_skb/stream_verdict sk_skb sk_msg lirc_mode2 flow_dissector cgroup/bind4 cgroup/bind6 cgroup/connect4 cgroup/connect6 cgroup/sendmsg4 cgroup/sendmsg6 cgroup/recvmsg4 cgroup/recvmsg6 cgroup/sysctl cgroup/getsockopt cgroup/setsockopt
# test_section_names: prog: unexpected rc=-3 for InvAliD
# libbpf: failed to guess program type based on ELF section name 'cgroup'
# libbpf: supported section(type) names are: socket kprobe/ uprobe/ kretprobe/ uretprobe/ classifier action tracepoint/ tp/ raw_tracepoint/ raw_tp/ tp_btf/ xdp perf_event lwt_in lwt_out lwt_xmit lwt_seg6local cgroup_skb/ingress cgroup_skb/egress cgroup/skb cgroup/sock cgroup/post_bind4 cgroup/post_bind6 cgroup/dev sockops sk_skb/stream_parser sk_skb/stream_verdict sk_skb sk_msg lirc_mode2 flow_dissector cgroup/bind4 cgroup/bind6 cgroup/connect4 cgroup/connect6 cgroup/sendmsg4 cgroup/sendmsg6 cgroup/recvmsg4 cgroup/recvmsg6 cgroup/sysctl cgroup/getsockopt cgroup/setsockopt
# test_section_names: prog: unexpected rc=-3 for cgroup
# Summary: 38 PASSED, 2 FAILED
not ok 18 selftests: bpf: test_section_names


To reproduce:

        # build kernel
	cd linux
	cp config-5.4.0-rc1-00595-gdd4436bb83833 .config
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
Rong Chen


View attachment "config-5.4.0-rc1-00595-gdd4436bb83833" of type "text/plain" (200590 bytes)

View attachment "job-script" of type "text/plain" (7060 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (40872 bytes)

Download attachment "kernel_selftests.xz" of type "application/x-xz" (37028 bytes)