netdev - "resolve_btfids: unresolved symbol" warnings while building v5.17-rc1

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Date:   Tue, 25 Jan 2022 23:29:20 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     memxor@...il.com, ast@...nel.org, Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: "resolve_btfids: unresolved symbol" warnings while building v5.17-rc1

On 11/15/21 16:34, Pavel Skripkin wrote:
> Hi, net/bpf developers!
> 
> While building newest kernel for fuzzing I met following warnings:
> 
> ```
>     BTFIDS  vmlinux
> WARN: resolve_btfids: unresolved symbol tcp_dctcp_kfunc_ids
> WARN: resolve_btfids: unresolved symbol tcp_cubic_kfunc_ids
> WARN: resolve_btfids: unresolved symbol tcp_bbr_kfunc_ids
>     SORTTAB vmlinux
> 
> ```
> 
> I haven't seen such warnings before and have no idea are they important
> or not. Config is attached.
> 
> My host is openSUSE Tumbleweed with gcc (SUSE Linux) 10.3.1 20210707
> [revision 048117e16c77f82598fca9af585500572d46ad73] if it's important :)
> 
> 

Hi Kumar and other net/bpf developers!,

while building v5.17-rc1 (0280e3c58f92b2fe0e8fbbdf8d386449168de4a8) with 
mostly random config I met this warning

```
WARN: resolve_btfids: unresolved symbol bpf_lsm_task_getsecid_subj
```

config attached. Thanks!



With regards,
Pavel Skripkin

Download attachment ".config" of type "application/x-config" (227690 bytes)