On Sun, May 24, 2020 at 9:09 PM Jan Stancek <[email protected]> wrote: > ----- Original Message ----- > > > FYI: This (and similar s390x ARK selinux-testuite failures) is caused > > > by a BPF/BTF-related issue, presumably caused/exposed by the CI ARK > > > kernels being cross-compiled. It is being investigated. > > > > Thanks for the note, the LTP failures are also BPF related and started only > > recently as well, while BPF testcases haven't changed since March. > > It does look like endian issue, presumably related to pahole (CC Arnaldo) > Only failing arch is s390, which is big endian. > > struct btf_header { > __u16 magic; > __u8 version; > __u8 flags; > __u32 hdr_len; > ... > > CKI cross-compiled kernel: > > # uname -r > 5.7.0-0.rc6.1.cki.fc33.s390x > # hexdump -C /sys/kernel/btf/vmlinux | head -1 > 00000000 9f eb 01 00 18 00 00 00 00 00 00 00 a4 9f 18 00 |................| > > Build from koji: > > # uname -r > 5.7.0-0.rc6.20200522git051143e1602d.1.fc33.s390x > # hexdump -C /sys/kernel/btf/vmlinux | head -1 > 00000000 eb 9f 01 00 00 00 00 18 00 00 00 00 00 18 35 ac |..............5.| > > bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SOCKET_FILTER, insn_cnt=1, > insns=[{code=BPF_JMP|BPF_K|BPF_EXIT, dst_reg=BPF_REG_0, src_reg=BPF_REG_0, > off=0, imm=0}], license="GP > L", log_level=7, log_size=8192, log_buf="", kern_version=KERNEL_VERSION(0, 0, > 0), prog_flags=0, prog_name="", prog_ifindex=0, > expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=0, f > unc_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, > line_info=NULL, line_info_cnt=0, attach_btf_id=0}, 112) = -1 EINVAL (Invalid > argument) > > Failed verification: in-kernel BTF is malformed
One other thing that might be related to this: The BPF test then started to fail also on 5.6 CKI stable kernels now (not at the same time as ARK) and it coincides with CONFIG_DEBUG_INFO=y starting to appear in the s390x configs (it is the only s390x config option that changed between the last passing and first failing stable CKI build). -- Ondrej Mosnacek <omosnace at redhat dot com> Software Engineer, Security Technologies Red Hat, Inc. _______________________________________________ kernel mailing list -- [email protected] To unsubscribe send an email to [email protected] Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/[email protected]
