From nobody Tue Apr 7 17:14:28 2026 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9FC4D3A0B21; Thu, 26 Feb 2026 09:53:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772099602; cv=none; b=JLCe5MmyA65Shj5J0SOTis2pyRWccPzfdviY1VB5owDnZgp1C4MxUM0T6kd7PZ0ER7UOUgGB+gedPEt+XDQ/5LlSNal/6Vcmblbt1MFK/7c36KjqUOwREZBqxElmkMVSBCHmT1kidpZWwNWKOORLqu4J/pE0pSWi5/CPRww8dt4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772099602; c=relaxed/simple; bh=eDjgoQckfBk/1LqsvZlpMrdjYiSff2kJicrYxPnu+Yc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=qX7GPDoRYQsYRUrvRPu59x+/r+yRd/oeWKNTh+E812JW3KQ4PzWrf5VJyNJntgSn9byY+q2KOen0v3Utnc/oNKUaiJvYztZGgJ5hDCeEMI+zXeg9cw4XcMPdrn8459w+DDWdHXelf7oHh1Pz+KPvY0zPK0tuQT+K2qH/FHQlofM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=l1o3uSn4; arc=none smtp.client-ip=117.135.210.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="l1o3uSn4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=nj pI2OhELvS/FVob2kMirqE/3cNZpdVyGbqW92Wuwjg=; b=l1o3uSn4nb5Hdc4dzQ tkX5yAJEIg2dhigeSEQPQwbxKVY/up+waz45n78Wg+lXd+G//Hbz1AxqYHNbk291 Z3Dq/ZwKknZkQjgycxnjB2wTpts2I5qS9z8RV5jOUtG+jGHpKnxOa2N1Hf6P5b/P YxdLM6SM2+if7FZm4lSNg4OcU= Received: from localhost.localdomain (unknown []) by gzga-smtp-mtada-g1-1 (Coremail) with SMTP id _____wDHcY68F6Bpat7wMg--.59449S4; Thu, 26 Feb 2026 17:51:59 +0800 (CST) From: Feng Yang To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, posk@google.com, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com Cc: bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, yangfeng59949@163.com Subject: [PATCH v7 bpf-next 2/2] selftests/bpf: Add selftests for the invocation of bpf_lwt_xmit_push_encap Date: Thu, 26 Feb 2026 17:51:56 +0800 Message-Id: <20260226095156.117996-3-yangfeng59949@163.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260226095156.117996-1-yangfeng59949@163.com> References: <20260226095156.117996-1-yangfeng59949@163.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wDHcY68F6Bpat7wMg--.59449S4 X-Coremail-Antispam: 1Uf129KBjvdXoW7XF4kCFWxXF4rWw13ur43GFg_yoWkXFc_tr sYga4kCrWxGFsIyayjkryUuryak39xWrZrGFZrJrn7C3yUX3Z8GFs7Gr1DJas2ga1fKr9x Za909FyIyr42qjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRCrWFDUUUUU== X-CM-SenderInfo: p1dqww5hqjkmqzuzqiywtou0bp/xtbC8R9372mgF78GtAAA3l Content-Type: text/plain; charset="utf-8" From: Feng Yang Calling bpf_lwt_xmit_push_encap will not cause a crash when dst is missing. Signed-off-by: Feng Yang --- .../selftests/bpf/progs/verifier_lwt.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/verifier_lwt.c b/tools/testi= ng/selftests/bpf/progs/verifier_lwt.c index 5ab746307309..a2b45e3e1542 100644 --- a/tools/testing/selftests/bpf/progs/verifier_lwt.c +++ b/tools/testing/selftests/bpf/progs/verifier_lwt.c @@ -231,4 +231,23 @@ __naked void not_permitted_for_lwt_prog(void) : __clobber_all); } =20 +SEC("lwt_xmit") +__description("missing dst when calling bpf_lwt_xmit_push_encap") +__success __retval(0) +__naked void missing_dst_call_bpf_lwt_xmit_push_encap(void) +{ + asm volatile (" \ + r9 =3D 69; \ + r3 =3D r10; \ + r3 +=3D -32; \ + *(u64 *)(r3 + 0) =3D r9; \ + r2 =3D 2; \ + r4 =3D 20; \ + call %[bpf_lwt_push_encap]; \ + exit; \ +" : + : __imm(bpf_lwt_push_encap) + : __clobber_all); +} + char _license[] SEC("license") =3D "GPL"; --=20 2.43.0