From nobody Mon May 25 08:11:41 2026 Received: from mail-yx1-f41.google.com (mail-yx1-f41.google.com [74.125.224.41]) (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 900273CC330 for ; Fri, 15 May 2026 15:16:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.224.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778858175; cv=none; b=j9TPbpVVjAiPv3wUeDQ16QKW6i29qpsZnb0O9L6Ixxmo32Qe0Cjdgc6mfzx1mSqDaGX56DsV1DdMqly3jRv8Laz9el2V2RmI94h8SExY5iXu48P8iY4zW37UU2GfVScOZjw7W51oBIaGPqMPTUbPvQbmEI+jLlDVTK9Jb4bhpZc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778858175; c=relaxed/simple; bh=j/JtzMkIpgce34VYyGskUNs64HhUE6kYkeklt0ZtZig=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ToipGHqnR++vZEET0eT3yyFOE809Z1CByPFLAwrMu79LtWsnMK/4b9waciUxLGX7q0wTNnXGhA/duktwae7k73C6GnNGpQUVhKZDlBGGXgKC37WDX9uKQG/1rNKsdiBCXCEKpyRAMMxZrsL+UoD88tb1G2mtmytj+X+rnBi56MM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=northecho.dev; spf=none smtp.mailfrom=northecho.dev; dkim=pass (2048-bit key) header.d=northecho-dev.20251104.gappssmtp.com header.i=@northecho-dev.20251104.gappssmtp.com header.b=lmHwvnil; arc=none smtp.client-ip=74.125.224.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=northecho.dev Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=northecho.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=northecho-dev.20251104.gappssmtp.com header.i=@northecho-dev.20251104.gappssmtp.com header.b="lmHwvnil" Received: by mail-yx1-f41.google.com with SMTP id 956f58d0204a3-6543c251311so1123888d50.0 for ; Fri, 15 May 2026 08:16:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=northecho-dev.20251104.gappssmtp.com; s=20251104; t=1778858173; x=1779462973; 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; bh=T3mh0bTathtWuR9OagZuWnPfTDRYwjb2Qrr+cXSGHw4=; b=lmHwvnillnbksuxlXpEmx99WxtLGBXT/ZMp5xaGoXhc03oWDSy6J/X5tdX/KM3lU9R jU4HmSi+41OqY69DDEag9pNmxvta3kQPrPO0IoMxv8orwF4Xj3keieOe71ciiqCPmsxZ /6ikV1FS2XyUCNeqGZJIGIKU7SuXayenwyy1xCxtkCBqj35IPvKESMExJUSUOULC/kU3 /ao7+W1jaPDww47JjdewtJ8kQmr7q1r2a9qU2yCRJrx7Fo5GyZTFUlwmdgNnXeOqPGEm mCWwUryGdCe8IvEW3x7QTo1hGUbc45IkJjijxUgADM6Vhnt56ElUZXkygSxYdBNYytPu derw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778858173; x=1779462973; 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; bh=T3mh0bTathtWuR9OagZuWnPfTDRYwjb2Qrr+cXSGHw4=; b=kmsYXj/BG3EP0zqAZc0ZmAm42he3Ckeb3qus7IARbw1/xyXL9amGf6xT55Qixxd+dd FyH6ohFtljsLqBEn4IhNHTLHauyD+l3MjUuMERm3/TZjEBqzr7vZBhxr7hAfjYWdcg0x V9CiODEUtzbGqkH+zgW26V9Mui04arH9Jnr1qnSL2+UNe5E0RMB+6JTxeAL90+iqy4eD kXDLHblNlsolNRBPTyYo7J/X4nuhw6uRuBDatCbDDOGI2XLzo12B6VSfCyLECGXTbidU Dzzo09PclIYOHUuh8jl8ShqZRkm49JIg90FNdxXucAOpKKCtn+UiDnymTfGlXfCl3JzI E3xw== X-Forwarded-Encrypted: i=1; AFNElJ/NtLUP/o0ZExNPmU1/rUMTtcKIqDaWMHQfo0RdKHZoDCHYxJeIsAdex0vf55UdXISUFkWOH/sJGnySiXM=@vger.kernel.org X-Gm-Message-State: AOJu0YxizgRTay6MFCK+9mRZpNxV/hkzZwgdpLsfOtNs7BJPuWESNCz+ xTqD4aqqiiXKlr6tz6UEbTSwk6WfCYE4rrf6yD/itlO5JhaABXZmHh4PFO0TTTYpAUzs X-Gm-Gg: Acq92OGvhaG8ZHyG2QSW+urpYYZ1IfOkjvp8AKpU0CPa3+2kFJcyaa4/hKQKr7XBiJd 4kDiY1PsvEhk/q4MrC/kyXqBFeXe3y9FHLbKgMbe1PO7jX2XvTLeLDrEnwaKHr/3fEA55o+HDXQ Z1w2F4eaZhoxVn8nurD9jJZuVjAni5ZN/uicdw7T/x+8Zsabfd5Uc+LiXG/oHJ0XQNt7jDnuMQc gq3eZWqk9Gt6jTUCn/h028foj2tO6Q6KFQlD9UYpHO2aGK+lk73c9wFbkxMQcFIBrxsrljp8S5J zwl1cIJB1c6C/h81aL80KzrpbjAtOHZhGDYmcbosIqc64tG58nssu+YQQiF67bTMfgbHKnU1dBV q/6vg40IU4OH9PSl4E7+KsiEFresqTZ3M/ewgCO2THn3cLIENIhJTCwnqCamq2t1/9Dm591wuIk HgXZAApSGu4vlT0pl4ekkQBLUl3A0ktbDW/AHbmJOxX+1dOhDYJ/JtlANNwVXpCaBSjgyo2oN+E I5mYKmrA2B+Tf8viM4t2D3rAw== X-Received: by 2002:a53:ac9c:0:b0:653:1298:2757 with SMTP id 956f58d0204a3-65e227bbac6mr2466784d50.3.1778858172447; Fri, 15 May 2026 08:16:12 -0700 (PDT) Received: from kelso.tail8e61da.ts.net (99-10-92-174.lightspeed.rlghnc.sbcglobal.net. [99.10.92.174]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-65e0d878cf2sm2724116d50.2.2026.05.15.08.16.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 May 2026 08:16:11 -0700 (PDT) From: Christopher Lusk To: Jakub Kicinski Cc: John Fastabend , Sabrina Dubroca , "David S . Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Shuah Khan , netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH net 1/2] net: tls: preserve split open record on async encrypt Date: Fri, 15 May 2026 11:15:55 -0400 Message-ID: <20260515151556.189841-2-clusk@northecho.dev> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260515151556.189841-1-clusk@northecho.dev> References: <20260515151556.189841-1-clusk@northecho.dev> 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 Content-Type: text/plain; charset="utf-8" When the BPF sk_msg verdict sets apply_bytes smaller than the current open record, tls_push_record() splits ctx->open_rec into the record being encrypted and a remainder record. The synchronous path reattaches the remainder to ctx->open_rec before continuing. If the selected AEAD provider completes asynchronously, tls_do_encryption() returns -EINPROGRESS after unhooking ctx->open_rec. tls_push_record() currently returns immediately in that case, before the split remainder is reattached. The remainder is no longer reachable through ctx->open_rec or ctx->tx_list, which can silently drop transmitted data and leak the unreachable tls_rec. Keep the split remainder rooted even when encryption of the first record is pending asynchronously, and continue the BPF verdict drain loop after an async record has been queued. Re-rooting alone is insufficient: the final split remainder can otherwise remain as ctx->open_rec until close, where it is freed instead of transmitted. Fixes: d3b18ad31f93 ("tls: add bpf support to sk_msg handling") Cc: stable@vger.kernel.org # 4.20+ Signed-off-by: Christopher Lusk Assisted-by: Codex:gpt-5.5 Assisted-by: Claude:claude-opus-4-7 --- net/tls/tls_sw.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index 964ebc268..6d3df74dd 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -840,16 +840,19 @@ static int tls_push_record(struct sock *sk, int flags, rc =3D tls_do_encryption(sk, tls_ctx, ctx, req, msg_pl->sg.size + prot->tail_size, i); if (rc < 0) { - if (rc !=3D -EINPROGRESS) { - tls_err_abort(sk, -EBADMSG); - if (split) { - tls_ctx->pending_open_record_frags =3D true; - tls_merge_open_record(sk, rec, tmp, orig_end); - } + if (rc =3D=3D -EINPROGRESS) + goto split_done; + + tls_err_abort(sk, -EBADMSG); + if (split) { + tls_ctx->pending_open_record_frags =3D true; + tls_merge_open_record(sk, rec, tmp, orig_end); } ctx->async_capable =3D 1; return rc; - } else if (split) { + } +split_done: + if (split) { msg_pl =3D &tmp->msg_plaintext; msg_en =3D &tmp->msg_encrypted; sk_msg_trim(sk, msg_en, msg_pl->sg.size + prot->overhead_size); @@ -857,6 +860,11 @@ static int tls_push_record(struct sock *sk, int flags, ctx->open_rec =3D tmp; } =20 + if (rc < 0) { + ctx->async_capable =3D 1; + return rc; + } + return tls_tx_records(sk, flags); } =20 @@ -871,6 +879,7 @@ static int bpf_exec_tx_verdict(struct sk_msg *msg, stru= ct sock *sk, struct sock *sk_redir; struct tls_rec *rec; bool enospc, policy, redir_ingress; + bool async =3D false; int err =3D 0, send; u32 delta =3D 0; =20 @@ -920,6 +929,10 @@ static int bpf_exec_tx_verdict(struct sk_msg *msg, str= uct sock *sk, switch (psock->eval) { case __SK_PASS: err =3D tls_push_record(sk, flags, record_type); + if (err =3D=3D -EINPROGRESS) { + async =3D true; + err =3D 0; + } if (err && err !=3D -EINPROGRESS && sk->sk_err =3D=3D EBADMSG) { *copied -=3D sk_msg_free(sk, msg); tls_free_open_rec(sk); @@ -989,7 +1002,7 @@ static int bpf_exec_tx_verdict(struct sk_msg *msg, str= uct sock *sk, } out_err: sk_psock_put(sk, psock); - return err; + return err ?: (async ? -EINPROGRESS : 0); } =20 static int tls_sw_push_pending_record(struct sock *sk, int flags) --=20 2.54.0 From nobody Mon May 25 08:11:41 2026 Received: from mail-yx1-f51.google.com (mail-yx1-f51.google.com [74.125.224.51]) (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 AFF903CCFC3 for ; Fri, 15 May 2026 15:16:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.224.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778858177; cv=none; b=k+0pu7e4s095Ku+iFtgl8tH0FYYAfVtH1naNZjIvs6w/s0sTSpSxhynwFXDUpUtPwJ/jqqwCIgW2b3+PBFfF8vHIEjpa8mc/163H4QuQYguAFWZcuZoseKfAPWahZHu3VndUbH2kfGp4mTjGz3I1KFOMQspdaVCrEvkG5s66F7M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778858177; c=relaxed/simple; bh=GIJIJDp6NwwYX0Q1AbNNOxWqITIK3rl3pHKEHpkJ2us=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=j5yANUeVqbF8iD0wvatRQlUqMqWOlHax1n2FpQxOjf/zaGPh3BEb2ptc753sGwgg6aYgB96HRqcRRgqErLkQeLEOfB0oi2UiYSCCbOpgOfy972lj9aFYAg49crRFe30InGS+fRC2djvIkEZH72COHncBb8GMbFSGPsnpjUUVcXc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=northecho.dev; spf=none smtp.mailfrom=northecho.dev; dkim=pass (2048-bit key) header.d=northecho-dev.20251104.gappssmtp.com header.i=@northecho-dev.20251104.gappssmtp.com header.b=lFH9Kiad; arc=none smtp.client-ip=74.125.224.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=northecho.dev Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=northecho.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=northecho-dev.20251104.gappssmtp.com header.i=@northecho-dev.20251104.gappssmtp.com header.b="lFH9Kiad" Received: by mail-yx1-f51.google.com with SMTP id 956f58d0204a3-65d8c6e78f0so1049290d50.3 for ; Fri, 15 May 2026 08:16:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=northecho-dev.20251104.gappssmtp.com; s=20251104; t=1778858174; x=1779462974; 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; bh=T1gP18CObPDJD3QB+9rYWPUzAtOZhH2+QD3gPrVbM98=; b=lFH9Kiad8WOQl2SddwASMzOlFrl8dYOSDTWgrWpfmZ6gmHkwff/wlFwYPpcMx9WA6z sCbJgrjgTMObh59mzYk6io1jUoDFX+VDP9RNhqB+C19ecbSSrv2KTUlNt/UAwJyNzKpb Nu0E9PL3l4fvMYucVXfJmWceP5qKlcMGZrvuFzQ4f9Qk0QOf09wuqSKEbQLqKviiTpIO +7P/FtGssH5PrzGmx9jHVWDjbukAOAw/AWDOxq+vyJLaVFZGD/C/FNL91FSVFTrGEtYU qp8S6j9r9IqPaFoj148bwtufVY6857gdCK4e5T8AklaFF9mSrgaAqvCFRtH2twww0nvL UKxg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778858174; x=1779462974; 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; bh=T1gP18CObPDJD3QB+9rYWPUzAtOZhH2+QD3gPrVbM98=; b=fN8jEEy2eoMOGlxudqJqAn8ojWfwiRVTAAKr/5Pb089NqglpEhuZTkx5Cj/mLbdNkT 0BAfnYAVUIqrscKe2uFo3HXH74rsSCpLm5Sbi0Tl05xF1uQ4dksTNDLy9DDD1crgZZRV 2HBHYm9gqHhM1l8/uHQXs77OeQn2wJQ39DcdbCH8kDj5Fkx7oquNIuNmlRN2yWmvZKEd NHiV96cVAmsW1MVbAH77yWFB4BFJIZyDBTyB+43LnwvfTfVKmoBbLoQvo0ZI1jfB5DYZ 4aSn2gBtDmY67CmCjadeuU96bDeJkEjtL5N7pd66L0W8ZB0ilwQHh0+BG+4dCnnoLwyt tV3w== X-Forwarded-Encrypted: i=1; AFNElJ+1n8Tpug2DqyeYy3vtluS97MxYHg7unEikvOZ1tc/9N4gkS/T54tjQSi2YRTWf7TZbJ5NVFUBYNUAg8bA=@vger.kernel.org X-Gm-Message-State: AOJu0YzTnLBh13sRJXC9AVuR4ZBiZQ+NF0qj1vwT0Cw9i3/7J4EHbbDo 2+Cn8qgIq2yTVaePyZUTbXIDpa7Gj/1p3bAZw6c+eldt0i01C+fxYm4PqS0ujx9G5wmm X-Gm-Gg: Acq92OH6qckkkPvg1p7w2K7x5xl0QlOa3SUyMi2eqrELhi01eUqaf13cEmPfSlKpNl4 rTm0a9gxHC/kM5gisH7046HjPTensUM54iaPLJST3nA4YUh1pB6iQ2hnDppd5ZaJYqgr2XUcuAB IO2hrQSXC5RRZ+4PgAknHZ1M6JmsjNzTN82AdA9AM3MmSr+VQFVo+rLjZ/AefkITFwtnvWAnkdM qRWCzcOGXc4A/b/AckjVoEYZmnRoBU2QGcRBvA6n6IzxwjAPXa6lBJuXtnhYBzDTrmLY77W+nNY pVpv8EP0xBuUfEytaIyGwR5e/dUnFm0IZBj/InTD830D/8PpBjz+FlURrVWkJIKEwnCz0dtUfDN J/uMU2A8JNaWx8gTnwoY6lv0aRyFcCCkntmDM3XVcUfkoX7Vt43RASb9W4Xt44Yhj9/TajBV3Gz Nz8SyeA5rqBHQThmlbwO9LBz6P4ZISPjTFdnjV0h3BgR33dwAWuGEU2dALMxGVUQs2LT3AzieHQ BdEcv5cjfFTOV8= X-Received: by 2002:a05:690e:1206:b0:653:9e2:1059 with SMTP id 956f58d0204a3-65e223a1712mr2896993d50.0.1778858173484; Fri, 15 May 2026 08:16:13 -0700 (PDT) Received: from kelso.tail8e61da.ts.net (99-10-92-174.lightspeed.rlghnc.sbcglobal.net. [99.10.92.174]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-65e0d878cf2sm2724116d50.2.2026.05.15.08.16.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 May 2026 08:16:12 -0700 (PDT) From: Christopher Lusk To: Jakub Kicinski Cc: John Fastabend , Sabrina Dubroca , "David S . Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Shuah Khan , netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net 2/2] selftests: net: add kTLS async split record regression Date: Fri, 15 May 2026 11:15:56 -0400 Message-ID: <20260515151556.189841-3-clusk@northecho.dev> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260515151556.189841-1-clusk@northecho.dev> References: <20260515151556.189841-1-clusk@northecho.dev> 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 Content-Type: text/plain; charset="utf-8" Add a kTLS TX regression test for the BPF sk_msg apply_bytes split-record path. The test sends four 4096-byte writes through a sockmap verdict program that applies 512-byte verdict windows, then verifies that the peer receives the full TLS-protected stream. Run the case once with the synchronous provider and once after instantiating an async pcrypt gcm(aes) provider. Vulnerable kernels silently truncate the async run because the split open-record remainder is lost when encryption returns -EINPROGRESS. Signed-off-by: Christopher Lusk Assisted-by: Codex:gpt-5.5 Assisted-by: Claude:claude-opus-4-7 --- tools/testing/selftests/net/Makefile | 5 + .../selftests/net/ktls_async_split.bpf.c | 24 ++ .../testing/selftests/net/ktls_async_split.c | 391 ++++++++++++++++++ 3 files changed, 420 insertions(+) create mode 100644 tools/testing/selftests/net/ktls_async_split.bpf.c create mode 100644 tools/testing/selftests/net/ktls_async_split.c diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests= /net/Makefile index f3da38c54..0435327e9 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -179,6 +179,7 @@ TEST_GEN_PROGS :=3D \ epoll_busy_poll \ icmp_rfc4884 \ ipv6_fragmentation \ + ktls_async_split \ proc_net_pktgen \ reuseaddr_conflict \ reuseport_bpf \ @@ -236,3 +237,7 @@ $(OUTPUT)/bind_bhash: LDLIBS +=3D -lpthread $(OUTPUT)/io_uring_zerocopy_tx: CFLAGS +=3D -I../../../include/ =20 include bpf.mk + +$(OUTPUT)/ktls_async_split: CFLAGS +=3D -I../../../lib +$(OUTPUT)/ktls_async_split: LDLIBS +=3D $(BPFOBJ) -lelf -lz +$(OUTPUT)/ktls_async_split: $(BPFOBJ) diff --git a/tools/testing/selftests/net/ktls_async_split.bpf.c b/tools/tes= ting/selftests/net/ktls_async_split.bpf.c new file mode 100644 index 000000000..c7caafb73 --- /dev/null +++ b/tools/testing/selftests/net/ktls_async_split.bpf.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include + +#ifndef SK_PASS +#define SK_PASS 1 +#endif + +char LICENSE[] SEC("license") =3D "GPL"; + +struct { + __uint(type, BPF_MAP_TYPE_SOCKMAP); + __uint(max_entries, 4); + __type(key, __u32); + __type(value, int); +} sock_map SEC(".maps"); + +SEC("sk_msg") +int apply_bytes_verdict(struct sk_msg_md *msg) +{ + bpf_msg_apply_bytes(msg, 512); + return SK_PASS; +} diff --git a/tools/testing/selftests/net/ktls_async_split.c b/tools/testing= /selftests/net/ktls_async_split.c new file mode 100644 index 000000000..a9a84e0f5 --- /dev/null +++ b/tools/testing/selftests/net/ktls_async_split.c @@ -0,0 +1,391 @@ +// SPDX-License-Identifier: GPL-2.0 + +#define _GNU_SOURCE + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "kselftest.h" + +#ifndef SOL_TLS +#define SOL_TLS 282 +#endif + +#define EXPECTED_BYTES 17312 + +static void fill_seq(unsigned char *p, size_t n, unsigned char seed) +{ + size_t i; + + for (i =3D 0; i < n; i++) + p[i] =3D (unsigned char)(seed + i); +} + +static void bump_memlock(void) +{ + struct rlimit r =3D { RLIM_INFINITY, RLIM_INFINITY }; + + setrlimit(RLIMIT_MEMLOCK, &r); +} + +static int run_cmd(const char *cmd) +{ + int ret =3D system(cmd); + + if (ret =3D=3D -1) + return -1; + if (WIFEXITED(ret)) + return WEXITSTATUS(ret); + return 1; +} + +static int instantiate_aead(const char *name) +{ + struct sockaddr_alg sa =3D { + .salg_family =3D AF_ALG, + }; + int fd, ret; + + strncpy((char *)sa.salg_type, "aead", sizeof(sa.salg_type) - 1); + strncpy((char *)sa.salg_name, name, sizeof(sa.salg_name) - 1); + + fd =3D socket(AF_ALG, SOCK_SEQPACKET, 0); + if (fd < 0) + return -errno; + + ret =3D bind(fd, (struct sockaddr *)&sa, sizeof(sa)); + if (ret < 0) + ret =3D -errno; + + close(fd); + return ret; +} + +static bool have_async_pcrypt(void) +{ + FILE *f =3D fopen("/proc/crypto", "r"); + char line[256]; + bool in_driver =3D false; + bool async =3D false; + + if (!f) + return false; + + while (fgets(line, sizeof(line), f)) { + if (!strncmp(line, "driver", 6)) { + in_driver =3D strstr(line, "pcrypt(") && + strstr(line, "gcm"); + async =3D false; + continue; + } + if (in_driver && !strncmp(line, "async", 5)) { + async =3D strstr(line, "yes"); + if (async) { + fclose(f); + return true; + } + } + } + + fclose(f); + return false; +} + +static bool module_loaded(const char *name) +{ + FILE *f =3D fopen("/proc/modules", "r"); + char line[256], mod[128]; + + if (!f) + return false; + + while (fgets(line, sizeof(line), f)) { + if (sscanf(line, "%127s", mod) =3D=3D 1 && !strcmp(mod, name)) { + fclose(f); + return true; + } + } + + fclose(f); + return false; +} + +static int make_listener(unsigned short *port) +{ + struct sockaddr_in addr =3D { + .sin_family =3D AF_INET, + .sin_addr.s_addr =3D htonl(INADDR_LOOPBACK), + .sin_port =3D 0, + }; + socklen_t len =3D sizeof(addr); + int fd, one =3D 1; + + fd =3D socket(AF_INET, SOCK_STREAM, 0); + if (fd < 0) + return -errno; + + if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0) + goto err; + if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) + goto err; + if (listen(fd, 1) < 0) + goto err; + if (getsockname(fd, (struct sockaddr *)&addr, &len) < 0) + goto err; + + *port =3D ntohs(addr.sin_port); + return fd; + +err: + close(fd); + return -errno; +} + +static int connect_client(unsigned short port) +{ + struct sockaddr_in addr =3D { + .sin_family =3D AF_INET, + .sin_addr.s_addr =3D htonl(INADDR_LOOPBACK), + .sin_port =3D htons(port), + }; + int fd; + + fd =3D socket(AF_INET, SOCK_STREAM, 0); + if (fd < 0) + return -errno; + if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) { + close(fd); + return -errno; + } + + return fd; +} + +static int make_tcp_pair(int *client_fd, int *peer_fd) +{ + unsigned short port =3D 0; + int listen_fd, c, p; + + listen_fd =3D make_listener(&port); + if (listen_fd < 0) + return listen_fd; + + c =3D connect_client(port); + if (c < 0) { + close(listen_fd); + return c; + } + + p =3D accept(listen_fd, NULL, NULL); + close(listen_fd); + if (p < 0) { + close(c); + return -errno; + } + + *client_fd =3D c; + *peer_fd =3D p; + return 0; +} + +static int enable_ktls_tx(int fd) +{ + struct tls12_crypto_info_aes_gcm_128 info; + static const char ulp[] =3D "tls"; + + if (setsockopt(fd, IPPROTO_TCP, TCP_ULP, ulp, sizeof(ulp)) < 0) + return -errno; + + memset(&info, 0, sizeof(info)); + info.info.version =3D TLS_1_2_VERSION; + info.info.cipher_type =3D TLS_CIPHER_AES_GCM_128; + fill_seq(info.iv, sizeof(info.iv), 0x11); + fill_seq(info.key, sizeof(info.key), 0x22); + fill_seq(info.salt, sizeof(info.salt), 0x33); + fill_seq(info.rec_seq, sizeof(info.rec_seq), 0x44); + + if (setsockopt(fd, SOL_TLS, TLS_TX, &info, sizeof(info)) < 0) + return -errno; + + return 0; +} + +static int attach_bpf(const char *obj_path, int sock_fd, struct bpf_object= **obj_out) +{ + struct bpf_object *obj; + struct bpf_program *prog; + int map_fd, prog_fd; + __u32 key =3D 0; + + obj =3D bpf_object__open_file(obj_path, NULL); + if (libbpf_get_error(obj)) + return -EINVAL; + if (bpf_object__load(obj)) + return -EINVAL; + + prog =3D bpf_object__find_program_by_name(obj, "apply_bytes_verdict"); + if (!prog) + return -ENOENT; + prog_fd =3D bpf_program__fd(prog); + + map_fd =3D bpf_object__find_map_fd_by_name(obj, "sock_map"); + if (map_fd < 0) + return -ENOENT; + + if (bpf_prog_attach(prog_fd, map_fd, BPF_SK_MSG_VERDICT, 0)) + return -errno; + if (bpf_map_update_elem(map_fd, &key, &sock_fd, BPF_ANY)) + return -errno; + + *obj_out =3D obj; + return 0; +} + +static void server_loop(int fd, int out_fd) +{ + unsigned char buf[16384]; + int total =3D 0; + + for (;;) { + ssize_t n =3D read(fd, buf, sizeof(buf)); + + if (n < 0) { + if (errno =3D=3D EINTR) + continue; + _exit(1); + } + if (!n) + break; + total +=3D (int)n; + } + + (void)write(out_fd, &total, sizeof(total)); + close(fd); + close(out_fd); + _exit(0); +} + +static int run_case(const char *obj_path, int *server_read) +{ + struct bpf_object *obj =3D NULL; + unsigned char buf[4096]; + int client_fd =3D -1, peer_fd =3D -1, pipefd[2] =3D { -1, -1 }; + pid_t pid; + int status, ret, i; + ssize_t n, got; + + ret =3D make_tcp_pair(&client_fd, &peer_fd); + if (ret) + return ret; + if (pipe(pipefd)) { + close(client_fd); + close(peer_fd); + return -errno; + } + + pid =3D fork(); + if (pid < 0) { + close(client_fd); + close(peer_fd); + close(pipefd[0]); + close(pipefd[1]); + return -errno; + } + if (!pid) { + close(pipefd[0]); + server_loop(peer_fd, pipefd[1]); + } + + close(peer_fd); + close(pipefd[1]); + + ret =3D attach_bpf(obj_path, client_fd, &obj); + if (ret) + goto out; + ret =3D enable_ktls_tx(client_fd); + if (ret) + goto out; + + fill_seq(buf, sizeof(buf), 0x80); + for (i =3D 0; i < 4; i++) { + n =3D send(client_fd, buf, sizeof(buf), 0); + if (n !=3D sizeof(buf)) { + ret =3D n < 0 ? -errno : -EIO; + goto out; + } + } + + shutdown(client_fd, SHUT_WR); + got =3D read(pipefd[0], server_read, sizeof(*server_read)); + if (got !=3D sizeof(*server_read)) + ret =3D -EIO; + +out: + close(client_fd); + close(pipefd[0]); + if (obj) + bpf_object__close(obj); + if (waitpid(pid, &status, 0) < 0) + return -errno; + if (!ret && (!WIFEXITED(status) || WEXITSTATUS(status))) + ret =3D -EIO; + return ret; +} + +int main(int argc, char **argv) +{ + const char *obj_path =3D argc > 1 ? argv[1] : "./ktls_async_split.bpf.o"; + int sync_read =3D 0, async_read =3D 0, ret; + + ksft_print_header(); + ksft_set_plan(2); + bump_memlock(); + + if (run_cmd("modprobe tls >/dev/null 2>&1") && !module_loaded("tls")) + ksft_exit_skip("missing tls module\n"); + + /* Keep the first run on the synchronous provider. */ + run_cmd("modprobe -r pcrypt >/dev/null 2>&1"); + ret =3D run_case(obj_path, &sync_read); + if (ret) + ksft_exit_fail_msg("sync case failed: %s\n", strerror(-ret)); + if (sync_read !=3D EXPECTED_BYTES) + ksft_exit_fail_msg("sync case read %d, expected %d\n", + sync_read, EXPECTED_BYTES); + ksft_test_result_pass("sync provider transmits split record\n"); + + run_cmd("modprobe af_alg algif_aead pcrypt >/dev/null 2>&1"); + ret =3D instantiate_aead("pcrypt(generic-gcm-vaes-avx2)"); + if (ret) + ret =3D instantiate_aead("pcrypt(gcm(aes))"); + if (ret || !have_async_pcrypt()) + ksft_exit_skip("missing async pcrypt gcm(aes) provider\n"); + + ret =3D run_case(obj_path, &async_read); + if (ret) + ksft_exit_fail_msg("async case failed: %s\n", strerror(-ret)); + if (async_read !=3D EXPECTED_BYTES) + ksft_exit_fail_msg("async case read %d, expected %d\n", + async_read, EXPECTED_BYTES); + ksft_test_result_pass("async provider transmits split record\n"); + + ksft_finished(); +} --=20 2.54.0