From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj2-f13.google.com (mail-pj2-f13.google.com [74.125.227.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 27437577E46 for ; Tue, 22 Sep 2026 17:20:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.227.141 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790097647; cv=none; b=AYL7VS3w5mxxQVOWOSrYdZsewac2/FX/4ggC9ol2naJKlRycTws7aV2ftyfpdzgBb8dvlG3tiVdSYD7zU9ux+rXKXDvVLGP/UtWPzYgCpMus9mxIlzLW3Wn8gEQ+wbNgeM3VtIyBlKXJChWbi8w+TkW8INK1gutPAFEO4vwRy2g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790097647; c=relaxed/simple; bh=UyVsKi/z/KsUsM+tJ57iW2vmtY2QlPdWiKWL4HrNgb0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sTZNHeYp5WRPuXV0R0YAEfIFMzPci28jOSDuS7UC5sTNrm9CcNHCKQOEjKSa2kqpLy+RZjM+UlFgjS2IVMlX4G/xWgI4UAkvURMMqpFnpK43uJltsK8mKRGnkd6y2dnNTLB2H+g3n35mh4e7KeHPOb09cnWLSQtLBeiAT0+BfKc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=etsalapatis.com; spf=pass smtp.mailfrom=etsalapatis.com; dkim=pass (2048-bit key) header.d=etsalapatis-com.20251104.gappssmtp.com header.i=@etsalapatis-com.20251104.gappssmtp.com header.b=oaDHLkM+; arc=none smtp.client-ip=74.125.227.141 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=etsalapatis.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=etsalapatis.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=etsalapatis-com.20251104.gappssmtp.com header.i=@etsalapatis-com.20251104.gappssmtp.com header.b="oaDHLkM+" Received: by mail-pj2-f13.google.com with SMTP id 98e67ed59e1d1-396ccd5cef0so122054a91.0 for ; Tue, 22 Sep 2026 10:20:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=etsalapatis-com.20251104.gappssmtp.com; s=20251104; t=1790097644; x=1790702444; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=6jvocuGAG0VoEVU1ra59j3nMXDz9/LzPeuMPZJ7bQhE=; b=oaDHLkM+0GRNKT9nLSk/jo60n28sJNmB7wnYjVBCktTxr5wcrus9BWfuq6Wmj+QMB6 K8vfqa2jloqzLTT+cnNaj4vLxLcsi8D+s7goXFQye2tr+07J+gLu3M3YflkYLKOvFQY1 oHTcET1bwmtPTweSpy8cCROdfH9iIshqnyUDUsQIbOoZ3Q7LHQSeweybme4WkQdI9ANB cvwdjasZ1d3I20KYSmzNjK6l5Bo0U6TH6WZOhmtkLAfGHDqkJ345FzrPW5jFkz+5NmqQ 50b4NOLk+VTptg5Oj2owNdB4rJwzd9YD8P4W/dCToUND99t9MhfFW8OSxCBr+nGMj/Tp 4M8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790097644; x=1790702444; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=6jvocuGAG0VoEVU1ra59j3nMXDz9/LzPeuMPZJ7bQhE=; b=t9osBI0UVjHqW6t1/Odj8390kkW1gtVfxSEI1i5cu4fg45TVdznqe2JJnsoclmch55 DBY8I24awvx54eYdo/AkPaluXsIZLHANRCVw0Yp+h3NYj0peO8l4oahEQF9LPjyX6Z4g twUkJd+lFbqfuP/nK42Hqx/v1NwZcNvkJ74GATVSBuY0AcyMovFIwrYsNNbn/bVyuOc7 xyir/PU60CwVSbDMtJ5Y+zT6eFjPcbKdXivahgr/p6sVkHFW5T22w112PyMj+O9IFdvc baKaV1FdDy8slYGSbbiUNFExI9SCAE+It/qbsxXXDV873o4qGoKsE5bHJVEaqtaylNk3 rQUQ== X-Forwarded-Encrypted: i=1; AKwUvBwnp4nAp6+i4qTcJITC4ECr2JpHiSQ9jVAP8buWQATYGGFWMA2gjjTdplPvdjJmMADC9qJMFmc=@vger.kernel.org X-Gm-Message-State: AFuF++lcDSwIKt4Os8UKGstMShXt1vZZUKHoIeWWPDKm0xy1t3b+7N/B 2Ned9SzutwqamLhIzDk6dmAPTX6C4ZZwBxhLirTA4L9sHOauTlXRB2uiYUOMhU8r6Jg= X-Gm-Gg: AYBFou0lFPUWi7RFQbvFr+vjBgjKm5WNismF8Yb7y96JGfZ/Y2pGXQKmoV8byQxuxmk meb3D2ThBn2hAR7LPP7ojzK/lYzdeTFH/D1lwePLx1r9OI6npU+vmE+UzZYq3YGi0oig0jePkTi 1GAv1nYCt5e4Pa1tYvcPxduex4F4heiGiIkUagTlRqcU2XR12O+oIvUiDlbHjE/xFsZxifdJ3Xe Kenz2m5UBEBnDhBFXWczWxCzIDf1yXzYcyXWiJTlaSoIIYWb5GgLq1FxG4EzA1S5BCq9Q0j52G3 MJRS8JoIxzFua8vFM2VjIfOQMt3XK6rtofKaT6Zms8AbgMXCXMAaEvXawsmgSv8CS1AY75bvvY4 heXXglQyTj3ya3TSwJ2e5VuaE6/u9XYTFB8kEpUeCuOt7EFUb2jovMi0EhrF++Nn9Vp0xvLvWAd H9frwaRwq9U0qDD25GE+wAQGWuI82BU5F11S+EgWr75pRdP1ATSpLN3/qzb9jqAB7KX8EVoQWMd HVOvsiiVayKIzJzzjZY5PJHUfufiXmBP/VLWypTkrfR55RfEp/XrATsWbohYM8= X-Received: by 2002:a17:90b:2f88:b0:39e:6a81:f349 with SMTP id 98e67ed59e1d1-3a07e6bc44fmr119066a91.35.1790097643516; Tue, 22 Sep 2026 10:20:43 -0700 (PDT) Received: from alpine05.ht.home (69-172-153-146.cable.teksavvy.com. [69.172.153.146]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a06cb7159fsm1774824a91.4.2026.09.22.10.20.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Sep 2026 10:20:43 -0700 (PDT) From: Emil Tsalapatis To: bpf@vger.kernel.org Cc: ast@kernel.org, andrii@kernel.org, eddyz87@gmail.com, memxor@gmail.com, daniel@iogearbox.net, netdev@vger.kernel.org, Emil Tsalapatis Subject: [PATCH bpf v2 04/11] selftests/bpf: Add selftests for rx_queue_mapping context access Date: Tue, 22 Sep 2026 17:20:21 +0000 Message-ID: <20260922172028.6269-5-emil@etsalapatis.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260922172028.6269-1-emil@etsalapatis.com> References: <20260922172028.6269-1-emil@etsalapatis.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add tests to ensure the verifier properly tracks the 0 bit state and width of the rx_queue_mapping field read from struct sock. Signed-off-by: Emil Tsalapatis --- .../selftests/bpf/progs/verifier_sock.c | 38 +++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/verifier_sock.c b/tools/testing/selftests/bpf/progs/verifier_sock.c index 2a136c917..565c4d8bc 100644 --- a/tools/testing/selftests/bpf/progs/verifier_sock.c +++ b/tools/testing/selftests/bpf/progs/verifier_sock.c @@ -88,6 +88,44 @@ l0_%=: r0 = *(u32*)(r1 + %[bpf_sock_family]); \ : __clobber_all); } +SEC("socket") +__description("skb->sk: sk->rx_queue_mapping [no sign extension]") +__success __success_unpriv __retval(0) +__naked void sk_rx_queue_mapping_no_sign_ext(void) +{ + asm volatile (" \ + r1 = *(u64*)(r1 + %[__sk_buff_sk]); \ + if r1 != 0 goto l0_%=; \ + r0 = 0xdead; \ + exit; \ +l0_%=: r0 = *(u32*)(r1 + %[bpf_sock_rx_queue_mapping]); \ + r0 >>= 32; \ + exit; \ +" : + : __imm_const(__sk_buff_sk, offsetof(struct __sk_buff, sk)), + __imm_const(bpf_sock_rx_queue_mapping, offsetof(struct bpf_sock, rx_queue_mapping)) + : __clobber_all); +} + +SEC("socket") +__description("skb->sk: sk->rx_queue_mapping [narrow load mask]") +__success __success_unpriv __retval(0) +__naked void sk_rx_queue_mapping_narrow_load_mask(void) +{ + asm volatile (" \ + r1 = *(u64*)(r1 + %[__sk_buff_sk]); \ + if r1 != 0 goto l0_%=; \ + r0 = 0xdead; \ + exit; \ +l0_%=: r0 = *(u16*)(r1 + %[bpf_sock_rx_queue_mapping]); \ + r0 >>= 16; \ + exit; \ +" : + : __imm_const(__sk_buff_sk, offsetof(struct __sk_buff, sk)), + __imm_const(bpf_sock_rx_queue_mapping, offsetof(struct bpf_sock, rx_queue_mapping)) + : __clobber_all); +} + SEC("cgroup/skb") __description("skb->sk: sk->type [fullsock field]") __failure __msg("invalid sock_common access") -- 2.54.0