Hello, we tested the bpf-next tree with CKI and ran across build failures. The important part of the build log is: 00:18:05 GEN .version 00:18:05 CHK include/generated/compile.h 00:18:05 LD vmlinux.o 00:18:27 MODPOST vmlinux.symvers 00:18:27 MODINFO modules.builtin.modinfo 00:18:27 GEN modules.builtin 00:18:27 LD .tmp_vmlinux.btf 00:18:42 BTF .btf.vmlinux.bin.o 00:19:13 LD .tmp_vmlinux.kallsyms1 00:19:19 KSYM .tmp_vmlinux.kallsyms1.o 00:19:22 LD .tmp_vmlinux.kallsyms2 00:19:25 KSYM .tmp_vmlinux.kallsyms2.o 00:19:28 LD vmlinux 00:19:40 BTFIDS vmlinux 00:19:40 FAILED unresolved symbol vfs_getattr 00:19:40 make[2]: *** [Makefile:1167: vmlinux] Error 255 00:19:40 make[1]: *** [scripts/Makefile.package:109: targz-pkg] Error 2 00:19:40 make: *** [Makefile:1528: targz-pkg] Error 2 Going git-bisect style, the issue is introduced by the patch series in [0]. Commit 2532f849b5134c4c62a20e5aaca33d9fb08af528 (last one before the mentioned series were merged) passes, testing of cd04b04de119a222c83936f7e9dbd46a650cb688 (last patch of the series) fails. The failure is still present with the current top of the tree. The kernel config used is a Fedora 32 config base + olddefconfig + kselftest-merge, you can grab it directly from [1]. Environment is Fedora rawhide. The failure is easily reproduced with our container image that already has all the needed dependencies installed: registry.gitlab.com/cki-project/containers/builder-rawhide:latest Steps to reproduce after starting the image: git clone https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git --depth 1 curl https://gitlab.com/-/snippets/2014934/raw -o bpf-next/.config cd bpf-next/ make -j 10 INSTALL_MOD_STRIP=1 targz-pkg I already notified Jirka (cced) earlier today but am also sending a bug report here in case someone else runs into the issue. I can help with testing of potential fixes if it's needed. Veronika [0]: https://lore.kernel.org/bpf/20200825192124.710397-1-jolsa@xxxxxxxxxx/ [1]: https://gitlab.com/-/snippets/2014934/raw
