From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 835DD2BE655; Mon, 1 Dec 2025 11:28:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764588521; cv=none; b=lf8qh1ymxZmMeqbWzvgeAdy66V7cqO8QoLK6IIs3SkUNgvK00n1ZATcAo4x5z9mQblp+W4Pfd0NIpfTWIf5ebryhN3xxJiittQQcRAjUnRC+DPk7wnq15ubWMkA/qpDq7DoLLLRq9a5VrHNGN8XSil4WuSuWMyPTwlhrRbuD5uI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764588521; c=relaxed/simple; bh=2VNSAWMX5oj4PTo1uT3ZTfuBOHBO2GyUKK9fU+WkTzw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Hv4jCz81NLZlzVgHSBDaSYxzFepcQuW5AL/1FZtaetpobbJ/N6kwqIi8xnlmzVv0AElNLn/cRMSXzsHUdPB6McEpWEO7BqM3oJIzc7ESuDKGpYmq9DEbqWgg5LXFMBYImDM0leOP9mS0Vq/pklcdn+L9CMkylBrwSPjqAO0/DEg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=o4q8Rmwt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="o4q8Rmwt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BEB3EC4CEF1; Mon, 1 Dec 2025 11:28:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764588521; bh=2VNSAWMX5oj4PTo1uT3ZTfuBOHBO2GyUKK9fU+WkTzw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o4q8RmwtVRGCdvmEgnUawcvEhL0c7T7/ltUBQRdFV9nZmMU84W1qa1v951rFdjJUb b5axVypr6KYYZbpAgDhRjp08//6f8ZqxlfB7NVWPAnCKpAgUrCCZkWCQGuyIR2/NRm MXZEtI9beVKDakI9Bx1IPv55OBejImAkiMFrjQy0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Juraj=20=C5=A0arinay?= , Krzysztof Kozlowski , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.4 076/187] net: nfc: nci: Increase NCI_DATA_TIMEOUT to 3000 ms Date: Mon, 1 Dec 2025 12:23:04 +0100 Message-ID: <20251201112243.979160335@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251201112241.242614045@linuxfoundation.org> References: <20251201112241.242614045@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Juraj Šarinay [ Upstream commit 21f82062d0f241e55dd59eb630e8710862cc90b4 ] An exchange with a NFC target must complete within NCI_DATA_TIMEOUT. A delay of 700 ms is not sufficient for cryptographic operations on smart cards. CardOS 6.0 may need up to 1.3 seconds to perform 256-bit ECDH or 3072-bit RSA. To prevent brute-force attacks, passports and similar documents introduce even longer delays into access control protocols (BAC/PACE). The timeout should be higher, but not too much. The expiration allows us to detect that a NFC target has disappeared. Signed-off-by: Juraj Šarinay Reviewed-by: Krzysztof Kozlowski Link: https://patch.msgid.link/20250902113630.62393-1-juraj@sarinay.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- include/net/nfc/nci_core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h index 004e49f748419..beea7e014b157 100644 --- a/include/net/nfc/nci_core.h +++ b/include/net/nfc/nci_core.h @@ -52,7 +52,7 @@ enum nci_state { #define NCI_RF_DISC_SELECT_TIMEOUT 5000 #define NCI_RF_DEACTIVATE_TIMEOUT 30000 #define NCI_CMD_TIMEOUT 5000 -#define NCI_DATA_TIMEOUT 700 +#define NCI_DATA_TIMEOUT 3000 struct nci_dev; -- 2.51.0