From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0002e601.pphosted.com (mx0a-0002e601.pphosted.com [148.163.150.75]) (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 B3BF95616C3; Thu, 10 Sep 2026 17:57:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=148.163.150.75 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789063063; cv=fail; b=s43hT5AT+cWywCxAKL2sbXO+8htO+0edoldYvOq/Q2EO4xw5xIoZNZIYgKixkH0CRQpVeHJiu1foc16ebIBNePVap7IVNOB+EeoBFDj/mXxXaaUnTkhxTfLeIfmlwcxM3afZLF7vylNsrQMg3n1sQN6lD1Tp2YK74v/ojrrF/W4= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789063063; c=relaxed/simple; bh=9vSr8UD7YrxNSRU4FlCNr19P22a3uBbHyJQjbuf5cAY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=NhqG7+n5x1bQ/qBO6qM3ov9Zh6H9wtGsGtbFeMX+R+csV7E7rGkTjqx/3qNFZ8Y20SYXgRIgeA9uIhaiYMuD2gnkJOH6DGkGwKI4yhTnTOm8SsI36HexH4bgLVpVudrLwlvn8GbnafOSon69PLioYpx1yjOCBBwAaAl4Ur6uTdQ= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (2048-bit key) header.d=ti.com header.i=@ti.com header.b=jEQabuz/; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=M5t+j8m4; arc=fail smtp.client-ip=148.163.150.75 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ti.com header.i=@ti.com header.b="jEQabuz/"; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="M5t+j8m4" Received: from pps.filterd (m0384305.ppops.net [127.0.0.1]) by m0384305.ppops.net (8.18.1.11/8.18.1.11) with ESMTP id 68AF62MN1430972; Thu, 10 Sep 2026 12:57:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s= proofpoint-05-2026; bh=LiBbIhss8/2e7+bI7uNZyro3rgV9+Z9yQkT6AKlN+ ZU=; b=jEQabuz/LA/ZUhx4RNr1VnssVwQvjSrDerlCRDzoOIX8K71l0Yvf6Amxb xd8w5tPm+xdmki67HewEUHaf2yJ/wikge3f+ppr+ABYGMAidPbdKdmd5iRQyji4V DpDhuyWRnNH6fGpuvLHvrM3e2rjq3+JOSEsPvUajqmpQnM4A8wmKDMj2DoQkddkA 8H2jHIVWUq+ng/e7zJA755KJEJVdiscIN42wNwhNSLDdVgpm38xVlYZ07WCI4u43 buoSv5KW5+cjBIeEtHJQLBK0mFSHBUavIO0PPdMP4kcS3oFOQvk8RbmWnLDTYMJi Bs3TS/X4xD1mmr7TASA5jUSlNcmeA== Received: from bn8pr05cu002.outbound.protection.outlook.com (mail-eastus2azon11011063.outbound.protection.outlook.com [52.101.57.63]) by m0384305.ppops.net (PPS) with ESMTPS id 4gkcxgfbhd-1 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Thu, 10 Sep 2026 12:57:30 -0500 (CDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=fwRVJYe07wK2CzLFsyUKWffwM2MUjUasA/KvAZWDa7Lw6dBXyeQlaC5oFILa6jVQi5hEMJ5O4xEkEP51vKOsgtFBiUFq7Ln3BHNNaErjoaqlJcrQa9BEa423ndLSrrCI7maTZvLlRR2/CLWzNDVjb6D0zN1g+Xb0mWiPktgmL9LlldQfLHNYW5aK6YBmV1bhC7Z3j5OpCkMRcrQRiQ5qMMtpehNZm7/7Cz89Ez1MIR4TXzsMvRcyJsaizdCLnQ+rkM3exu2aodlz5dMlpDfTlOZpQL1lxjo4FQYmw3GdIqMAEmd32bTBRR2RHZ4dSK5TJ5JmKPpIOmaqufG77UCDpQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=LiBbIhss8/2e7+bI7uNZyro3rgV9+Z9yQkT6AKlN+ZU=; b=FSqcvrYgKdSuHVGEBXWEbE9PblvD5tL2IQSFm63CNBsGJNicWh63dQ+cXWQFt8sinGs1dDvfzFMIFH9kuQQPqEP9KeNBlflceNp9D44IVpZu1MIwBxsyTmfQFZf8QB0UnqlYIsU2tcirDUS+5eb2ewDrn3N2+w/fBIZG00Y1NZheUrINV5XJGGvbDm4KRzhTU46aONdhMk45zVsg013iUwTgf4lvz0llJgteTjEsgHn7qaTG76qxi08/7sV4MG4VKp35fcn9fxZhELVcutGQBRAXFIwA/fqMbqXYBtoVolf85rDCDSsf/qDFeBr+rBQ3RxivhTgtG4zIOiKEl4Qpdg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 198.47.21.195) smtp.rcpttodomain=gondor.apana.org.au smtp.mailfrom=ti.com; dmarc=pass (p=quarantine sp=none pct=100) action=none header.from=ti.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=LiBbIhss8/2e7+bI7uNZyro3rgV9+Z9yQkT6AKlN+ZU=; b=M5t+j8m4ikGoEx9GW7+Nfe16M71QmqesixjTlWh3YD7aShjG34YsOgV9ebwxiONXVbfTC0CrXlt5SilxO84iqlvRJrzvItq3+PAfqxcD7y3nOmajcSy5RtAYGeqzrQP28TiB3xIFovDEGxctxivwEohzr79vKArOXogQKdfNaK8= Received: from CH0PR07CA0004.namprd07.prod.outlook.com (2603:10b6:610:32::9) by IA0PR10MB7370.namprd10.prod.outlook.com (2603:10b6:208:3dd::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.428.4; Thu, 10 Sep 2026 17:57:25 +0000 Received: from CH1PEPF0000AD81.namprd04.prod.outlook.com (2603:10b6:610:32:cafe::35) by CH0PR07CA0004.outlook.office365.com (2603:10b6:610:32::9) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.21.406.9 via Frontend Transport; Thu, 10 Sep 2026 17:57:25 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 198.47.21.195) smtp.mailfrom=ti.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=ti.com; Received-SPF: Pass (protection.outlook.com: domain of ti.com designates 198.47.21.195 as permitted sender) receiver=protection.outlook.com; client-ip=198.47.21.195; helo=flwvzet201.ext.ti.com; pr=C Received: from flwvzet201.ext.ti.com (198.47.21.195) by CH1PEPF0000AD81.mail.protection.outlook.com (10.167.244.89) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.406.5 via Frontend Transport; Thu, 10 Sep 2026 17:57:23 +0000 Received: from DFLE210.ent.ti.com (10.64.6.68) by flwvzet201.ext.ti.com (10.248.192.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45; Thu, 10 Sep 2026 12:56:44 -0500 Received: from DFLE201.ent.ti.com (10.64.6.59) by DFLE210.ent.ti.com (10.64.6.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45; Thu, 10 Sep 2026 12:56:44 -0500 Received: from lelvem-mr06.itg.ti.com (10.180.75.8) by DFLE201.ent.ti.com (10.64.6.59) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45 via Frontend Transport; Thu, 10 Sep 2026 12:56:44 -0500 Received: from pratham-Workstation-PC (pratham-workstation-pc.dhcp.ti.com [10.24.53.205]) by lelvem-mr06.itg.ti.com (8.18.1/8.18.1) with ESMTP id 68AHuhS02793654; Thu, 10 Sep 2026 12:56:44 -0500 From: T Pratham To: T Pratham , Herbert Xu , "David S. Miller" CC: Sebin Francis , Manorit Chawdhry , Vishal Mahaveer , Praneeth Bajjuri , , Subject: [PATCH v4 04/15] crypto: ti - Fix use-after-free of dev_data on DTHEv2 driver removal Date: Thu, 10 Sep 2026 23:26:08 +0530 Message-ID: <20260910175619.2122149-5-t-pratham@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260910175619.2122149-1-t-pratham@ti.com> References: <20260910175619.2122149-1-t-pratham@ti.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000AD81:EE_|IA0PR10MB7370:EE_ X-MS-Office365-Filtering-Correlation-Id: 8b95d3ca-98ae-4aca-9a60-08df0f64f7bc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|23010399003|36860700016|82310400026|56012099006|10067099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:198.47.21.195;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:flwvzet201.ext.ti.com;PTR:ErrorRetry;CAT:NONE;SFS:(13230040)(1800799024)(376014)(23010399003)(36860700016)(82310400026)(56012099006)(10067099003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: Vnb/3kG2eReQ7OJumvuoOSDZlUS7wzHo3Of8FJ5RXXEIzvLiX5ha/+gkMiy2jqC6JNcewBbg9yMovdcoMuio0FyKh8GRuOVs9ZWQfXAeO7BABeA12HPWhanTDmcTpWywBFBiYTKQg1kGnBM7co8Zu/0XNMxbjopF/SaOCrtY2mvE+YEd35atiEe51ZpsAe7A+q7G7tyvd09yOE/ov808MRrt9luWU7oCxHa2jjC0ljWtg8b1JWRjRxNFHKcqVRBovMEoMvbCyIrC5EOwnd9q+bAq/FErcLNQlossZ3PnFw/JJDRHVLeWZju1OH32uJoPypM2JjsMfbOdJinM6YbblJ9QNRoaSl/Q6FgVhpIlY74w/555Pe4qZ6zNigroVmdLins3OwUCj9ieSkGaLsqnpTjpggIG/v28NQZdVoSD1adf/Ay5m8ultjAeTcbCtbRa X-Exchange-RoutingPolicyChecked: MqasFVA8mJa24HWLpTO4koVm7ut31Q+cv3K9gUkz1/FLDODm/dg6jBX46Ft4kH4EaQaTnKxhexoJbMRydeD5S1uOjAONUjlfGsc1rJ4bf0XdcLQ0Hr0tAo8+gOu0c7cD0M6PLLD7t6YvB1kZC3sKtQQu34T9XMLmj2ZDbE2BqaW0tqG7Xd+HkgzZSE5bt5YEnQvdk1nY7kCwRqfg3o24ifH5RBQYCAfEwpWF5pVPwreU6jxGGjdIrdYlDpkiCHCdmyUkEHHmn9XeoTfT5j5Sy14jOQOANeca3dR4tv8fiQmuTdnnZdWpmg770FDeArE7110b67E9pCLlPlR8kKJkRg== X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Sep 2026 17:57:23.6363 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8b95d3ca-98ae-4aca-9a60-08df0f64f7bc X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.195];Helo=[flwvzet201.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000AD81.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR10MB7370 X-Proofpoint-ORIG-GUID: dVrslkFTywkzSYfae6yLyaUkWnCW87Bq X-Proofpoint-Spam-Info: AW1haW4tMjYwOTEwMDIyMCBTYWx0ZWRfXyey3MGlxGzt9 PTtuY6QshwqHzVYufBlk70wN/v4W6MLXKSxnm+wzWrOX8WBVuM7RPUOxVgKiXwip/an+awQnM1U LVB607ve1+uRutLPeG7PChyMByD8bF4= X-Proofpoint-GUID: dVrslkFTywkzSYfae6yLyaUkWnCW87Bq X-Authority-Analysis: v=2.4 cv=MqbHeGae c=1 sm=1 tr=0 ts=6aa2ef8a cx=c_pps a=MlxngMRGYcnGG1Y86Hm5lQ==:117 a=tJyPKKxUohctrY4NYmUjkA==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=VdqzKS8jKosA:10 a=V5UXEbMT0ywA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Z8NIEmU8O1QQgoT56wFK:22 a=taLDd7a_hP9WKsMzeGRc:22 a=sozttTNsAAAA:8 a=i7zdQjoT4sji5VLZqVYA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTEwMDIyMCBTYWx0ZWRfXyAA1i9sXF7h2 VqgVdt0zatyE38krTQztrkNAjJKsRwVOmUch+dXXQrkB9wxPDbioLyABpzu/TGNqxxO2+99umVz Vbt2cY/X+SsRwq/JGrNPxc9Z9tflJiJ0FG6zFN7uN8bT0RP+X+vrB7dsJBqNPSQzw1JyHLSCKzI Hm0uBFjWmz1dgFRJcoqIP9yqlr2An2nLSq7d5vcxokIMehvY5jK3r9/8rP5UrD/TsdlyH8fp+ah 7DOC1ZMPYRUsO49LcUz1JI0/Rwh6J1yiDq3cMwDAl1XCTmNyy/UdRYKzAEjhyXy4yWGO5ixS9Fl 4+W4tm5G/MyBoZMUiuS6pHAtPEd1ykFwhs2uuwp/Z8EOmDBGq/lHS+fYH2wO9z5pkDjn8A/O2RM uDrOdOY7Y5LagH+0QLSqWTSaAn+QzaaTkUvvslTVDPx92oPt22SkFYqywp53hAFl6u/i9GuEDmL LcQztKLVHjVjYTlRAxw== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-10_05,2026-09-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 spamscore=0 bulkscore=0 adultscore=0 suspectscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609100220 Each *_init_tfm() caches a pointer to the per-instance struct dthe_data in its transform context (ctx->dev_data), but never takes a reference on it. If there are tfms in progress when dthe_remove() is called, the devm allocated dev_data gets freed. Then ctx->dev_data will point to a memory that has been freed. Move dthe_data to req_ctx structs of algorithms, and store the device pointer in tfm_ctx. Add a refcnt to struct dthe_data, which atomically counts the number of requests enqueued in the crypto engine queue which reference the dthe_data object. A waitqueue waits on this atomic counter to get back to zero in dthe_remove() before doing the driver teardown. Fixes: 52f641bc63a46 ("crypto: ti - Add driver for DTHE V2 AES Engine (ECB, CBC)") Signed-off-by: T Pratham --- drivers/crypto/ti/dthev2-aes.c | 74 +++++++++++++++++++++---------- drivers/crypto/ti/dthev2-common.c | 40 ++++++++++++++--- drivers/crypto/ti/dthev2-common.h | 52 ++++++++++++++++++++-- 3 files changed, 134 insertions(+), 32 deletions(-) diff --git a/drivers/crypto/ti/dthev2-aes.c b/drivers/crypto/ti/dthev2-aes.c index 4fdd24ee91637..6a8fbe67ef6cd 100644 --- a/drivers/crypto/ti/dthev2-aes.c +++ b/drivers/crypto/ti/dthev2-aes.c @@ -110,12 +110,11 @@ enum aes_ctrl_mode_masks { static int dthe_cipher_init_tfm(struct crypto_skcipher *tfm) { struct dthe_tfm_ctx *ctx = crypto_skcipher_ctx(tfm); - struct dthe_data *dev_data = dthe_get_dev(ctx); - if (!dev_data) + ctx->dev = dthe_get_dev(); + if (!dev) return -ENODEV; - ctx->dev_data = dev_data; ctx->keylen = 0; return 0; @@ -124,20 +123,19 @@ static int dthe_cipher_init_tfm(struct crypto_skcipher *tfm) static int dthe_cipher_init_tfm_fallback(struct crypto_skcipher *tfm) { struct dthe_tfm_ctx *ctx = crypto_skcipher_ctx(tfm); - struct dthe_data *dev_data = dthe_get_dev(ctx); const char *alg_name = crypto_tfm_alg_name(crypto_skcipher_tfm(tfm)); - if (!dev_data) + ctx->dev = dthe_get_dev(); + if (!ctx->dev) return -ENODEV; - ctx->dev_data = dev_data; ctx->keylen = 0; - ctx->skcipher_fb = crypto_alloc_sync_skcipher(alg_name, 0, CRYPTO_ALG_NEED_FALLBACK); if (IS_ERR(ctx->skcipher_fb)) { - dev_err(dev_data->dev, "fallback driver %s couldn't be loaded\n", + dev_err(ctx->dev, "fallback driver %s couldn't be loaded\n", alg_name); + dthe_put_dev(ctx->dev); return PTR_ERR(ctx->skcipher_fb); } @@ -149,6 +147,7 @@ static void dthe_cipher_exit_tfm(struct crypto_skcipher *tfm) struct dthe_tfm_ctx *ctx = crypto_skcipher_ctx(tfm); crypto_free_sync_skcipher(ctx->skcipher_fb); + dthe_put_dev(ctx->dev); } static int dthe_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen) @@ -225,7 +224,7 @@ static void dthe_aes_set_ctrl_key(struct dthe_tfm_ctx *ctx, struct dthe_aes_req_ctx *rctx, u32 *iv_in) { - struct dthe_data *dev_data = dthe_get_dev(ctx); + struct dthe_data *dev_data = rctx->dev_data; void __iomem *aes_base_reg = dev_data->regs + DTHE_P_AES_BASE; u32 ctrl_val = 0; @@ -337,8 +336,8 @@ static int dthe_aes_run(struct crypto_engine *engine, void *areq) { struct skcipher_request *req = container_of(areq, struct skcipher_request, base); struct dthe_tfm_ctx *ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req)); - struct dthe_data *dev_data = dthe_get_dev(ctx); struct dthe_aes_req_ctx *rctx = skcipher_request_ctx(req); + struct dthe_data *dev_data = rctx->dev_data; unsigned int len = req->cryptlen; struct scatterlist *src = req->src; @@ -520,14 +519,17 @@ static int dthe_aes_run(struct crypto_engine *engine, void *areq) local_bh_disable(); crypto_finalize_skcipher_request(dev_data->engine, req, ret); local_bh_enable(); + dthe_put_drvdata(dev_data); return 0; } static int dthe_aes_crypt(struct skcipher_request *req) { struct dthe_tfm_ctx *ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req)); - struct dthe_data *dev_data = dthe_get_dev(ctx); + struct dthe_aes_req_ctx *rctx = skcipher_request_ctx(req); + struct dthe_data *dev_data; struct crypto_engine *engine; + int ret; /* * If data is not a multiple of AES_BLOCK_SIZE: @@ -553,8 +555,18 @@ static int dthe_aes_crypt(struct skcipher_request *req) return 0; } + dev_data = dthe_get_drvdata(ctx->dev); + if (!dev_data) + return -ENODEV; + + rctx->dev_data = dev_data; + engine = dev_data->engine; - return crypto_transfer_skcipher_request_to_engine(engine, req); + ret = crypto_transfer_skcipher_request_to_engine(engine, req); + if (ret != -EINPROGRESS && ret != -EBUSY) + dthe_put_drvdata(dev_data); + + return ret; } static int dthe_aes_encrypt(struct skcipher_request *req) @@ -576,19 +588,18 @@ static int dthe_aes_decrypt(struct skcipher_request *req) static int dthe_aead_init_tfm(struct crypto_aead *tfm) { struct dthe_tfm_ctx *ctx = crypto_aead_ctx(tfm); - struct dthe_data *dev_data = dthe_get_dev(ctx); const char *alg_name = crypto_tfm_alg_name(crypto_aead_tfm(tfm)); - if (!dev_data) + ctx->dev = dthe_get_dev(); + if (!ctx->dev) return -ENODEV; - ctx->dev_data = dev_data; - ctx->aead_fb = crypto_alloc_sync_aead(alg_name, 0, CRYPTO_ALG_NEED_FALLBACK); if (IS_ERR(ctx->aead_fb)) { - dev_err(dev_data->dev, "fallback driver %s couldn't be loaded\n", + dev_err(ctx->dev, "fallback driver %s couldn't be loaded\n", alg_name); + dthe_put_dev(ctx->dev); return PTR_ERR(ctx->aead_fb); } @@ -600,6 +611,7 @@ static void dthe_aead_exit_tfm(struct crypto_aead *tfm) struct dthe_tfm_ctx *ctx = crypto_aead_ctx(tfm); crypto_free_sync_aead(ctx->aead_fb); + dthe_put_dev(ctx->dev); } /** @@ -711,9 +723,9 @@ static struct scatterlist *dthe_aead_prep_crypt(struct scatterlist *sg, return crypt_sg; } -static int dthe_aead_read_tag(struct dthe_tfm_ctx *ctx, u32 *tag) +static int dthe_aead_read_tag(struct dthe_aes_req_ctx *rctx, u32 *tag) { - struct dthe_data *dev_data = dthe_get_dev(ctx); + struct dthe_data *dev_data = rctx->dev_data; void __iomem *aes_base_reg = dev_data->regs + DTHE_P_AES_BASE; u32 val; int ret; @@ -734,11 +746,12 @@ static int dthe_aead_read_tag(struct dthe_tfm_ctx *ctx, u32 *tag) static int dthe_aead_enc_get_tag(struct aead_request *req) { struct dthe_tfm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); + struct dthe_aes_req_ctx *rctx = aead_request_ctx(req); u32 tag[AES_BLOCK_WORDS]; int nents; int ret; - ret = dthe_aead_read_tag(ctx, tag); + ret = dthe_aead_read_tag(rctx, tag); if (ret) return ret; @@ -753,12 +766,13 @@ static int dthe_aead_enc_get_tag(struct aead_request *req) static int dthe_aead_dec_verify_tag(struct aead_request *req) { struct dthe_tfm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); + struct dthe_aes_req_ctx *rctx = aead_request_ctx(req); u32 tag_out[AES_BLOCK_WORDS]; u32 tag_in[AES_BLOCK_WORDS]; int nents; int ret; - ret = dthe_aead_read_tag(ctx, tag_out); + ret = dthe_aead_read_tag(rctx, tag_out); if (ret) return ret; @@ -859,7 +873,7 @@ static int dthe_aead_run(struct crypto_engine *engine, void *areq) struct aead_request *req = container_of(areq, struct aead_request, base); struct dthe_tfm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); struct dthe_aes_req_ctx *rctx = aead_request_ctx(req); - struct dthe_data *dev_data = dthe_get_dev(ctx); + struct dthe_data *dev_data = rctx->dev_data; unsigned int cryptlen = req->cryptlen; unsigned int assoclen = req->assoclen; @@ -1130,6 +1144,7 @@ static int dthe_aead_run(struct crypto_engine *engine, void *areq) local_bh_disable(); crypto_finalize_aead_request(engine, req, ret); local_bh_enable(); + dthe_put_drvdata(dev_data); return 0; } @@ -1137,10 +1152,11 @@ static int dthe_aead_crypt(struct aead_request *req) { struct dthe_tfm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); struct dthe_aes_req_ctx *rctx = aead_request_ctx(req); - struct dthe_data *dev_data = dthe_get_dev(ctx); + struct dthe_data *dev_data; struct crypto_engine *engine; unsigned int cryptlen = req->cryptlen; bool is_zero_ctr = true; + int ret; /* In decryption, last authsize bytes are the TAG */ if (!rctx->enc) @@ -1191,8 +1207,18 @@ static int dthe_aead_crypt(struct aead_request *req) (ctx->aes_mode == DTHE_AES_CCM && !is_zero_ctr)) return dthe_aead_do_fallback(req); + dev_data = dthe_get_drvdata(ctx->dev); + if (!dev_data) + return -ENODEV; + + rctx->dev_data = dev_data; + engine = dev_data->engine; - return crypto_transfer_aead_request_to_engine(engine, req); + ret = crypto_transfer_aead_request_to_engine(engine, req); + if (ret != -EINPROGRESS && ret != -EBUSY) + dthe_put_drvdata(dev_data); + + return ret; } static int dthe_aead_encrypt(struct aead_request *req) diff --git a/drivers/crypto/ti/dthev2-common.c b/drivers/crypto/ti/dthev2-common.c index 8628187a32e18..f5c834a9c011d 100644 --- a/drivers/crypto/ti/dthev2-common.c +++ b/drivers/crypto/ti/dthev2-common.c @@ -32,22 +32,46 @@ static struct dthe_list dthe_dev_list = { .lock = __SPIN_LOCK_UNLOCKED(dthe_dev_list.lock), }; -struct dthe_data *dthe_get_dev(struct dthe_tfm_ctx *ctx) +struct device *dthe_get_dev(void) { struct dthe_data *dev_data; - - if (ctx->dev_data) - return ctx->dev_data; + struct device *dev = NULL; spin_lock(&dthe_dev_list.lock); dev_data = list_first_entry_or_null(&dthe_dev_list.dev_list, struct dthe_data, list); - if (dev_data) + if (dev_data) { list_move_tail(&dev_data->list, &dthe_dev_list.dev_list); + dev = get_device(dev_data->dev); + } + spin_unlock(&dthe_dev_list.lock); + + return dev; +} + +void dthe_put_dev(struct device *dev) +{ + put_device(dev); +} + +struct dthe_data *dthe_get_drvdata(struct device *dev) +{ + struct dthe_data *dev_data; + + spin_lock(&dthe_dev_list.lock); + dev_data = dev_get_drvdata(dev); + if (dev_data) + atomic_inc(&dev_data->req_refcnt); spin_unlock(&dthe_dev_list.lock); return dev_data; } +void dthe_put_drvdata(struct dthe_data *dev_data) +{ + if (atomic_dec_and_test(&dev_data->req_refcnt)) + wake_up(&dev_data->drain_wq); +} + struct scatterlist *dthe_copy_sg(struct scatterlist *dst, struct scatterlist *src, unsigned int buflen) @@ -153,6 +177,9 @@ static int dthe_probe(struct platform_device *pdev) if (IS_ERR(dev_data->regs)) return PTR_ERR(dev_data->regs); + atomic_set(&dev_data->req_refcnt, 0); + init_waitqueue_head(&dev_data->drain_wq); + platform_set_drvdata(pdev, dev_data); spin_lock(&dthe_dev_list.lock); @@ -203,10 +230,13 @@ static void dthe_remove(struct platform_device *pdev) spin_lock(&dthe_dev_list.lock); list_del(&dev_data->list); + platform_set_drvdata(pdev, NULL); spin_unlock(&dthe_dev_list.lock); dthe_unregister_algs(); + wait_event(dev_data->drain_wq, !atomic_read(&dev_data->req_refcnt)); + crypto_engine_exit(dev_data->engine); dma_release_channel(dev_data->dma_aes_rx); diff --git a/drivers/crypto/ti/dthev2-common.h b/drivers/crypto/ti/dthev2-common.h index 75d9a097650da..a827817e8119a 100644 --- a/drivers/crypto/ti/dthev2-common.h +++ b/drivers/crypto/ti/dthev2-common.h @@ -18,12 +18,14 @@ #include #include +#include #include #include #include #include #include #include +#include #define DTHE_REG_SIZE 4 #define DTHE_DMA_TIMEOUT_MS 2000 @@ -53,6 +55,8 @@ enum dthe_aes_mode { * @dma_aes_rx: AES Rx DMA Channel * @dma_aes_tx: AES Tx DMA Channel * @dma_sha_tx: SHA Tx DMA Channel + * @req_refcnt: Count of requests currently using this instance. + * @drain_wq: Waited on by dthe_remove() until @req_refcnt reaches zero. */ struct dthe_data { struct device *dev; @@ -64,6 +68,9 @@ struct dthe_data { struct dma_chan *dma_aes_tx; struct dma_chan *dma_sha_tx; + + atomic_t req_refcnt; + wait_queue_head_t drain_wq; }; /** @@ -78,7 +85,7 @@ struct dthe_list { /** * struct dthe_tfm_ctx - Transform ctx struct containing ctx for all sub-components of DTHE V2 - * @dev_data: Device data struct pointer + * @dev: Device this transform is bound to. * @keylen: AES key length * @authsize: Authentication size for modes with authentication * @key: AES key @@ -87,7 +94,7 @@ struct dthe_list { * @skcipher_fb: Fallback crypto skcipher handle for AES-XTS mode */ struct dthe_tfm_ctx { - struct dthe_data *dev_data; + struct device *dev; unsigned int keylen; unsigned int authsize; u32 key[DTHE_MAX_KEYSIZE / sizeof(u32)]; @@ -103,16 +110,55 @@ struct dthe_tfm_ctx { * @enc: flag indicating encryption or decryption operation * @padding: padding buffer for handling unaligned data * @aes_compl: Completion variable for use in manual completion in case of DMA callback failure + * @dev_data: Device data struct pointer */ struct dthe_aes_req_ctx { int enc; u8 padding[2 * AES_BLOCK_SIZE]; struct completion aes_compl; + struct dthe_data *dev_data; }; /* Struct definitions end */ -struct dthe_data *dthe_get_dev(struct dthe_tfm_ctx *ctx); +/** + * dthe_get_dev - Get the device pointer after increasing its reference count + * + * Description: + * Picks a device instance and gets the associated device pointer through get_device() + * to maintain its reference count by the kernel itself. Callers must ensure to call + * dthe_put_dev() at exit to decrease the refcnt. + */ +struct device *dthe_get_dev(void); + +/** + * dthe_put_dev - Decrease the reference count of the device + * @dev: Device pointer to be released + * + * Description: + * Decreases the reference count of the device pointer obtained through dthe_get_dev() + * by calling put_device(). + */ +void dthe_put_dev(struct device *dev); + +/** + * dthe_get_drvdata - Get a reference counted device driver data pointer + * @dev: Device pointer + * + * Description: + * Returns the instance's driver data if it is still bound, with @req_refcnt + * incremented, or NULL if it has been removed. Every req accepted for + * processing must call this and balance it with exactly one + * dthe_put_drvdata() when done. + */ +struct dthe_data *dthe_get_drvdata(struct device *dev); + +/** + * dthe_put_drvdata - Decrease the refcnt of the device driver data acquired through + * dthe_get_drvdata() + * @dev_data: Driver data previously returned by dthe_get_drvdata() + */ +void dthe_put_drvdata(struct dthe_data *dev_data); /** * dthe_copy_sg - Copy sg entries from src to dst -- 2.34.1