From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7AB0735F8C5 for ; Thu, 25 Jun 2026 17:56:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782410170; cv=none; b=Q+SdjCCQjF7ZGJvmdqKTuuCwjrPmH+Qf3v7nnpQADqaf6UiyCpsbNEqNhZLGfSc8errHql8lG4UZb4DR93JncIfeWGuUi4Htn6IyxPWy74slF4jKGPHRtjuuoHX5a93VKyNi7sZZ7USV4XIP38St0MCR02z+5OPkqxKYTgMa9MU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782410170; c=relaxed/simple; bh=9/hXovOSfVHRUhHpw22A3DwxKoaIGDJKlj/7GrmPcjM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mjVzgH0tp1J/IZDHaajZ6mfe9TBVJMTsgKyFOENhungYTxVdT0tXVDyeMYKTzHipGtw+4ylfw4Alej4YGuVSW6VpDw8br7bd/64zLRgAEKPLQ73MUP5nU6hNOECHTgVZHExj70JTs8Sbbra99rL9ej3dLEpLO73mt0F8kLC4vV4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LzCDM60v; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LzCDM60v" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5900F1F00A3A; Thu, 25 Jun 2026 17:56:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782410167; bh=cdZR9oAP6r/RMtlmxoPmfyCHQcWZX/jV7+hTF4Uzo8A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=LzCDM60vgk6v51MNX2MzG3OgQH9RuuGh0Xw7Ix1H5SgYe5CViWtkKh/BK7ieqoxgx 7AuTj/YQtNm2KEUHDDXtpVPzGqBFjkHOBM0s6Gzkq4QC06QrsXIxXC2be4pmJWwXO2 L4OLTVZi5VnOSdabflXpbHqJyyRmD38PYUBRJCNibshPxXuSjguV+Ll+7n38mwSLeQ XQHyM7s/ri6SLtnPJWWrA3ytLfSg4rMDsXGVrG2PMv1xa4vdf93SGgfyImHwSGnZCe yHp3ZpMZR8g25eC0HnxAdt/CIcofllxieX1zcc4gfgLU5bsgmfIUuBiWM/rI7cZXio JzPMl48r2EmHQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Thorsten Blum , Herbert Xu , Sasha Levin Subject: [PATCH 6.1.y 2/4] crypto: qat - Replace kzalloc() + copy_from_user() with memdup_user() Date: Thu, 25 Jun 2026 13:56:02 -0400 Message-ID: <20260625175604.2543972-2-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260625175604.2543972-1-sashal@kernel.org> References: <2026062533-verdict-shuffle-1baa@gregkh> <20260625175604.2543972-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Thorsten Blum [ Upstream commit 1e26339703e2afd397037defa798682b2b93dcc0 ] Replace kzalloc() followed by copy_from_user() with memdup_user() to improve and simplify adf_ctl_alloc_resources(). memdup_user() returns either -ENOMEM or -EFAULT (instead of -EIO) if an error occurs. Remove the unnecessary device id initialization, since memdup_user() (like copy_from_user()) immediately overwrites it. No functional changes intended other than returning the more idiomatic error code -EFAULT. Signed-off-by: Thorsten Blum Signed-off-by: Herbert Xu Stable-dep-of: d237230728c5 ("crypto: qat - remove unused character device and IOCTLs") Signed-off-by: Sasha Levin --- drivers/crypto/qat/qat_common/adf_ctl_drv.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/crypto/qat/qat_common/adf_ctl_drv.c b/drivers/crypto/qat/qat_common/adf_ctl_drv.c index 82b69e1f725ba2..c74a92c00a9b4f 100644 --- a/drivers/crypto/qat/qat_common/adf_ctl_drv.c +++ b/drivers/crypto/qat/qat_common/adf_ctl_drv.c @@ -90,17 +90,10 @@ static int adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data **ctl_data, { struct adf_user_cfg_ctl_data *cfg_data; - cfg_data = kzalloc(sizeof(*cfg_data), GFP_KERNEL); - if (!cfg_data) - return -ENOMEM; - - /* Initialize device id to NO DEVICE as 0 is a valid device id */ - cfg_data->device_id = ADF_CFG_NO_DEVICE; - - if (copy_from_user(cfg_data, (void __user *)arg, sizeof(*cfg_data))) { + cfg_data = memdup_user((void __user *)arg, sizeof(*cfg_data)); + if (IS_ERR(cfg_data)) { pr_err("QAT: failed to copy from user cfg_data.\n"); - kfree(cfg_data); - return -EIO; + return PTR_ERR(cfg_data); } *ctl_data = cfg_data; -- 2.53.0