* Re: [PATCH bpf-next 2/6] bpf: Add syscall common attrs support for xdp link_create
[not found] <20261017142649.51047-3-leon.hwang@linux.dev>
@ 2026-10-18 3:46 ` kernel test robot
2026-10-18 16:29 ` Leon Hwang
0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2026-10-18 3:46 UTC (permalink / raw)
To: Leon Hwang, bpf
Cc: llvm, oe-kbuild-all, Andrew Lunn, David S . Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Simon Horman, Alexei Starovoitov,
Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman,
Kumar Kartikeya Dwivedi, Martin KaFai Lau, Song Liu,
Yonghong Song, Jiri Olsa, Emil Tsalapatis, Ihor Solodrai,
Jesper Dangaard Brouer, John Fastabend, Stanislav Fomichev,
Steven Rostedt, Masami Hiramatsu, Mathieu Desnoyers, Shuah Khan,
Kuniyuki Iwashima, Hangbin Liu, Martin Karsten, Masashi Honma,
linux-kernel
Hi Leon,
kernel test robot noticed the following build errors:
[auto build test ERROR on bpf-next/master]
url: https://github.com/intel-lab-lkp/linux/commits/Leon-Hwang/bpf-Add-syscall-common-attrs-support-for-link_create/20261017-222644
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link: https://lore.kernel.org/r/20261017142649.51047-3-leon.hwang%40linux.dev
patch subject: [PATCH bpf-next 2/6] bpf: Add syscall common attrs support for xdp link_create
config: um-defconfig (https://download.01.org/0day-ci/archive/20261018/202610181115.hv8jYAxy-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 6719b9e31d6a93099612c474eec76d9f41d0275a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261018/202610181115.hv8jYAxy-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610181115.hv8jYAxy-lkp@intel.com/
All errors (new ones prefixed by >>):
/usr/bin/ld: warning: .tmp_vmlinux1 has a LOAD segment with RWX permissions
/usr/bin/ld: net/core/dev.o: in function `bpf_xdp_link_attach':
>> net/core/dev.c:10789:(.ltext+0xcb71): undefined reference to `bpf_log'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
vim +10789 net/core/dev.c
10774
10775 int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog,
10776 struct bpf_verifier_log *log)
10777 {
10778 struct net *net = current->nsproxy->net_ns;
10779 struct bpf_link_primer link_primer;
10780 struct netlink_ext_ack extack = {};
10781 struct bpf_xdp_link *link;
10782 struct net_device *dev;
10783 int err, fd;
10784
10785 rtnl_lock();
10786 dev = dev_get_by_index(net, attr->link_create.target_ifindex);
10787 if (!dev) {
10788 rtnl_unlock();
10789 bpf_log(log, "Invalid target_ifindex.\n");
10790 return -EINVAL;
10791 }
10792
10793 link = kzalloc_obj(*link, GFP_USER);
10794 if (!link) {
10795 err = -ENOMEM;
10796 goto unlock;
10797 }
10798
10799 bpf_link_init(&link->link, BPF_LINK_TYPE_XDP, &bpf_xdp_link_lops, prog,
10800 attr->link_create.attach_type);
10801 link->dev = dev;
10802 link->flags = attr->link_create.flags;
10803
10804 err = bpf_link_prime(&link->link, &link_primer);
10805 if (err) {
10806 kfree(link);
10807 goto unlock;
10808 }
10809
10810 netdev_lock_ops(dev);
10811 err = dev_xdp_attach_link(dev, &extack, link);
10812 netdev_unlock_ops(dev);
10813 rtnl_unlock();
10814
10815 if (err) {
10816 link->dev = NULL;
10817 bpf_link_cleanup(&link_primer);
10818 bpf_log(log, extack._msg);
10819 trace_bpf_xdp_link_attach_failed(extack._msg);
10820 goto out_put_dev;
10821 }
10822
10823 fd = bpf_link_settle(&link_primer);
10824 /* link itself doesn't hold dev's refcnt to not complicate shutdown */
10825 dev_put(dev);
10826 return fd;
10827
10828 unlock:
10829 rtnl_unlock();
10830
10831 out_put_dev:
10832 dev_put(dev);
10833 return err;
10834 }
10835
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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