From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=82.195.75.108 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793980693; b=yj3kEdLrHK0gLIN42FXv4bCpt2IgtAO3Vz5njEj0JMhOKEq/NT0Zihh9c9t5F2D2PwSF fWxfHiDDN/mkc3Tciig5Mf1JDgjjAs5pihvVhVbhAG38gzo+ntp4uqchRDhz4K4Dp6gpP NX0ikRat73FXc/q2+FJopVdqhwFrGr2s1ffyHoz/vGJsAd0SuFnJkO8YGkVwo+IGPh96S 41M4msofL+Oi3vboG+92jJOya9Q5c2L1Y7eyGSdCjRKnD7UMDsvYMIvHKc2ZlJjIB7PLT 3q6tHyibIV5hk8tupJ/Je3k+GrrS/ZUiumn7Ug5lFIAT25Kq6kXEC0I4L52EJvOLKCA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793980693; h=DMARC-Filter:DKIM-Signature:Received:Date:From:To:Cc:Subject: Message-ID:References:MIME-Version:Content-Type:Content-Disposition: In-Reply-To:X-Debian-User; bh=m/XHSoz1deN/ONmn+rJC+0iAtRvNH3rJU7syscPU2ow=; b=w7sWe7Fq59DiqleqEFKXvIJEYF42veWiRK0WbQST00eFh8MnFJc0g0vBVyNzrkLJ5OLW zfDi+PU7Jt+pthTCVUIuKvBkgyOvjsWe/WpgxtlALiMFNqE5net0s3AjKLVN2ZCV5GyuE wFEwyvNhlDiGMPErfz232LRErkeC+Dv9Ug7njQkuy+pfKBeYz6I9FlpAHxNpUHXvWzcNi hYfDMwEX4pk9K2BRyYKVE9dKNWhXvUKPs8q3P+VfTAMdU+Ko5q9n90dtKi7x6r9L7Og2i aFrOxgDxegpN9wCsLCA3EgNo1ATAA8DZpvVIDF5dpaDv7M5yDXtLfVK/crD0tJKc6eQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=debian.org; spf=pass smtp.mailfrom=debian.org; dkim=pass header.d=debian.org header.i=@debian.org header.a=rsa-sha256 header.s=smtpauto.stravinsky header.b=elwkYRr0; arc=none smtp.remote-ip=82.195.75.108 Received: from stravinsky.debian.org (stravinsky.debian.org [82.195.75.108]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D4DE606A326; Fri, 6 Nov 2026 15:58:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 7D4DE606A326 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=debian.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=debian.org header.i=@debian.org header.a=rsa-sha256 header.s=smtpauto.stravinsky header.b=elwkYRr0 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=m/XHSoz1deN/ONmn+rJC+0iAtRvNH3rJU7syscPU2ow=; b=elwkYRr0dqg+hDAASsQPtUIwGn K0oJEdbmDZYspUHyxDb2AkXDlVbNXc9F35rCmsoNBQkPr3f3zhxcp13P0Rm5EAkB+lXs8f6jSWZtG TnsAfnbI6v6gVz7/hQxvmXm60oOZoC5XFxmmwiYiiALZh0CgDvAeTuTNmEPCXX/+gzkP1NvQwDMND OQHrReVMGPaXJtzmUPncXiMdtUsJfMxpTd6MhFGmqJM7XDAiCeGCxlhlENF/kJmbNi4Re3cNxCQJv Y7Bw3r2IDnAFORObDNd0w+d9MAoht/D4Vf02jHxoIS2MtUfPUQOioHqXm2zBpzJPmvm4w++Vq+os6 gbGnBUpw==; Received: from authenticated-user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1xPMKM-009Od9-1i; Fri, 06 Nov 2026 15:58:06 +0000 Date: Fri, 6 Nov 2026 07:58:01 -0800 From: Breno Leitao To: Jiayuan Chen , 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 Message-ID: References: X-Mailing-List: netdev@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Debian-User: leitao 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),