From nobody Thu Apr 2 23:53:23 2026 Received: from out-188.mta1.migadu.com (out-188.mta1.migadu.com [95.215.58.188]) (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 1FC0B264628 for ; Sun, 15 Feb 2026 20:52:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771188770; cv=none; b=O5Z9dIFdJe63IKOJHb1XQIG6OpV/1ZkF7iltVvc8kSWC3WQjXYJyKodZI6fT/1f+0JWOMVX6SlADwnCOMN2HobG7IMrKdW2xmjuCbla7w0CKNIW/KPvOBg0sxu/7JjLzDg7TkltN7Wxva3iWCzFc2W3hA+8P637yXukCfnr88NE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771188770; c=relaxed/simple; bh=IaRfvG8hmQqdCiU5gHdwwHAEt2t/xdCLu/2rHPHDMBY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=W6wLNk2Y9CVJ0goOrMiMFTJDLjzE1+hpZVWw/AcdIcn+CDQX30ujlJJXFDsj8UNvCd8JxVLGP8UuE3SngFgC+a3lY2Hj2E4v+q20VMWVN/es8IWCkQNhaJIl/aa9SgWAwYTsVhx7HIFI5h4UTIV+OmIKqG7stgaqJfTqWXIEKYQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=MyDr4+eu; arc=none smtp.client-ip=95.215.58.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="MyDr4+eu" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1771188757; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=Y4yLFGf0HuJyxk3nhKGUWRxXjLXHz3M7orS/XBgijeE=; b=MyDr4+euL02IC4+VXxYcvssTN0X0GLTlmegXORHSNzzOSyvjqXycitdGbS8kjNWcRdWxz1 eYUleSUGyg/uhoEXwIkjtopdVJyiPqvrnP/JHY+I7QhPWaqEW0QRJWjbzJsCUsMIsh1wq3 IadfEfh2clOZk1Xz5e38pTRw7TEQ6GM= From: Thorsten Blum To: Herbert Xu , "David S. Miller" , Nicolas Ferre , Alexandre Belloni , Claudiu Beznea , Lothar Rubusch Cc: Thorsten Blum , stable@vger.kernel.org, linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] crypto: atmel-sha204a - Fix error codes in OTP reads Date: Sun, 15 Feb 2026 21:51:53 +0100 Message-ID: <20260215205152.518472-3-thorsten.blum@linux.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 X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" Return -EINVAL from atmel_i2c_init_read_otp_cmd() on invalid addresses instead of -1. Since the OTP zone is accessed in 4-byte blocks, valid addresses range from 0 to OTP_ZONE_SIZE / 4 - 1. Fix the bounds check accordingly. In atmel_sha204a_otp_read(), propagate the actual error code from atmel_i2c_init_read_otp_cmd() instead of -1. Also, return -EIO instead of -EINVAL when the device is not ready. Cc: stable@vger.kernel.org Fixes: e05ce444e9e5 ("crypto: atmel-sha204a - add reading from otp zone") Signed-off-by: Thorsten Blum Reviewed-by: Lothar Rubusch --- Compile-tested only. --- drivers/crypto/atmel-i2c.c | 4 ++-- drivers/crypto/atmel-sha204a.c | 7 ++++--- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/crypto/atmel-i2c.c b/drivers/crypto/atmel-i2c.c index 9688d116d07e..ba9d3f593601 100644 --- a/drivers/crypto/atmel-i2c.c +++ b/drivers/crypto/atmel-i2c.c @@ -72,8 +72,8 @@ EXPORT_SYMBOL(atmel_i2c_init_read_config_cmd); =20 int atmel_i2c_init_read_otp_cmd(struct atmel_i2c_cmd *cmd, u16 addr) { - if (addr < 0 || addr > OTP_ZONE_SIZE) - return -1; + if (addr >=3D OTP_ZONE_SIZE / 4) + return -EINVAL; =20 cmd->word_addr =3D COMMAND; cmd->opcode =3D OPCODE_READ; diff --git a/drivers/crypto/atmel-sha204a.c b/drivers/crypto/atmel-sha204a.c index 0fcf4a39de27..6b4e2764523e 100644 --- a/drivers/crypto/atmel-sha204a.c +++ b/drivers/crypto/atmel-sha204a.c @@ -94,9 +94,10 @@ static int atmel_sha204a_rng_read(struct hwrng *rng, voi= d *data, size_t max, static int atmel_sha204a_otp_read(struct i2c_client *client, u16 addr, u8 = *otp) { struct atmel_i2c_cmd cmd; - int ret =3D -1; + int ret; =20 - if (atmel_i2c_init_read_otp_cmd(&cmd, addr) < 0) { + ret =3D atmel_i2c_init_read_otp_cmd(&cmd, addr); + if (ret < 0) { dev_err(&client->dev, "failed, invalid otp address %04X\n", addr); return ret; @@ -106,7 +107,7 @@ static int atmel_sha204a_otp_read(struct i2c_client *cl= ient, u16 addr, u8 *otp) =20 if (cmd.data[0] =3D=3D 0xff) { dev_err(&client->dev, "failed, device not ready\n"); - return -EINVAL; + return -EIO; } =20 memcpy(otp, cmd.data+1, 4); --=20 Thorsten Blum GPG: 1D60 735E 8AEF 3BE4 73B6 9D84 7336 78FD 8DFE EAD4