From nobody Thu Apr 2 22:06:51 2026 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.2]) (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 34BBD22ACEB; Fri, 13 Feb 2026 02:46:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.2 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770950785; cv=none; b=M0RiTS8g2JbcNhYzaj0GVuaVxzNzTDAhV2Q9zPsfHK/+RqZwk5yvrmdIcIleaJxArmIIu4tXnFisS0G2BexagE1od/3exvjEx33CFheR4yVgQtpGpS1ZoMe2EDSyd3F7uUojHsR3fo6oH4oBU2vPzJWwxMo9TV7FDSIlXTToCts= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770950785; c=relaxed/simple; bh=LDZ94JtoHMM1UEYU5Q90klCQ7sVAFPEQpBpyLjSIKFY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Yb4si6CSQrvtYiQBOWgBZfOYgplfJXmGEqTQePBDKQ8WtABsZUMNk0I0rGIYM19y39H95WxlSPBy9EsVYZ7nu6OP3cC+KGL2VTdPVqpWEVHHh0D2v3AkGGTZ6vYFyBqqLESeti8gs7n8UpvLqNVOt80CwP/JYWgStq/BQ60L7wk= 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=dE2ZlQ7i; arc=none smtp.client-ip=220.197.31.2 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="dE2ZlQ7i" 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=4e RwFhUgku6857Z68xn0kodvZ/XzFvUeVFNaJo7REB4=; b=dE2ZlQ7i0edP11WknB LWkXHmBBKZyTlM2+OE4VJ83j5hWivqA0fnD2lN5Zy7tO57/UbpPuPrcp/+mTbHVx xhb5/OAITU6aTRW0BDBJyvr1KojB16h1Qcv72f9C4MHMThNDEG/qAEbypwphruii Ey9F4VSGtkmRmLit2W++xibX0= Received: from localhost.localdomain (unknown []) by gzga-smtp-mtada-g1-3 (Coremail) with SMTP id _____wAnZNoNkI5pvhZSLw--.1343S4; Fri, 13 Feb 2026 10:44:32 +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 v6 bpf-next 2/2] selftests/bpf: Add selftests for the invocation of bpf_lwt_xmit_push_encap Date: Fri, 13 Feb 2026 10:44:29 +0800 Message-Id: <20260213024429.39972-3-yangfeng59949@163.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260213024429.39972-1-yangfeng59949@163.com> References: <20260213024429.39972-1-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: _____wAnZNoNkI5pvhZSLw--.1343S4 X-Coremail-Antispam: 1Uf129KBjvdXoW7XF4kCFWxXF4rArW3Wr48JFb_yoWkWrg_tr sYga4kCrWxGFnIyayjkr1UCryakwsxWr9rJFsrJr1kCw4UX3Z8GFs7Gr1DJas2g3y3Kr9x Aa909F1Iyr42qjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRCrWFDUUUUU== X-CM-SenderInfo: p1dqww5hqjkmqzuzqiywtou0bp/xtbC8RAmnmmOkBBaUgAA32 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 | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/verifier_lwt.c b/tools/testi= ng/selftests/bpf/progs/verifier_lwt.c index 5ab746307309..9cef07e6eceb 100644 --- a/tools/testing/selftests/bpf/progs/verifier_lwt.c +++ b/tools/testing/selftests/bpf/progs/verifier_lwt.c @@ -231,4 +231,24 @@ __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]; \ + r0 =3D 0; \ + exit; \ +" : + : __imm(bpf_lwt_push_encap) + : __clobber_all); +} + char _license[] SEC("license") =3D "GPL"; --=20 2.43.0