From: Breno Leitao <leitao@debian.org>
To: Jiayuan Chen <jiayuan.chen@linux.dev>, acme@kernel.org
Cc: kuniyu@google.com, netdev@vger.kernel.org, llvm@lists.linux.dev,
ast@kernel.org, yonghong.song@linux.dev, bpf@vger.kernel.org,
kuba@kernel.org, tj@kernel.org
Subject: Re: [BUG] bpf: tcp: bpf_tcp_ops_set_rcvlowat() missing from BTF with clang KCSAN
Date: Fri, 6 Nov 2026 07:58:01 -0800 [thread overview]
Message-ID: <au347UiVUe5oUuxM@gmail.com> (raw)
In-Reply-To: <a69dd097-7e71-41f0-9a6b-eda001773236@linux.dev>
On Fri, Nov 06, 2026 at 09:16:24PM +0800, Jiayuan Chen wrote:
> Thanks for the report !
>
>
> On 11/6/26 7:38 PM, Breno Leitao wrote:
> > My arm64 KCSAN builds of linux-next fail since next-20261015, because
> > bpf_tcp_ops_set_rcvlowat() is missing from the vmlinux BTF:
> >
> > WARN: resolve_btfids: no BTF func for kfunc bpf_tcp_ops_set_rcvlowat in bpf_tcp_ops_set_rcvlowat_kfunc_set
> > WARN: resolve_btfids: unresolved symbol bpf_tcp_ops_set_rcvlowat
> > Failed to generate BTF for vmlinux
> > Try to disable CONFIG_DEBUG_INFO_BTF
> > make[4]: *** [scripts/Makefile.vmlinux:72: vmlinux.unstripped] Error 1
>
>
>
> Has pahole fixed this issue?
I don't think so, see the line below:
> > This is clang 22.1.3 and pahole 1.31 (current pahole master behaves the
> > same),
next prev parent reply other threads:[~2026-11-06 15:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-06 11:38 [BUG] bpf: tcp: bpf_tcp_ops_set_rcvlowat() missing from BTF with clang KCSAN Breno Leitao
2026-11-06 13:16 ` Jiayuan Chen
2026-11-06 15:58 ` Breno Leitao [this message]
2026-11-06 19:05 ` Kuniyuki Iwashima
2026-11-09 12:33 ` Breno Leitao
2026-11-09 17:51 ` Arnaldo Carvalho de Melo
2026-11-10 5:40 ` netdev-bot+sashiko
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