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 C46003431FA; Tue, 11 Nov 2025 01:21:18 +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=1762824078; cv=none; b=cPYKWIhrSzsGrJ4WiGtSZfYxt/M+Viq0KzEqK7lk1DyC/wZ5fWbQqod7lMS8cEY2jUrqvCnZcyFxDQ5Yji5UulXO5xcAPvZ23FVTJRhfOH+6u5uEDyyFPgJG5bFGOHWcGJA8s+kr4w5aiMGGIStSPljdYtaCIxbmGYiw9du6CpI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762824078; c=relaxed/simple; bh=NSKdRJmnsGjkFTNMMf0H4UjltGvwBeY15SoMg3hFnGA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=RWcP3AOKAT6NV8moiL6rjTYesrk6h8xolhJDgo9+X6JhsJQxHvzUVFLb4yzkw/Sp6uKL5dOTD+AVZ871TY4Bu0xznXR6WuPfyHehkPRDhIgR5+llmjar/uSwUHyp3MR4EbryywlqpGyAJPa435m6/uuQo7kEWMGYhfFPNTCQmh4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=joY/wbyT; 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="joY/wbyT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4D4C4C4CEFB; Tue, 11 Nov 2025 01:21:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1762824078; bh=NSKdRJmnsGjkFTNMMf0H4UjltGvwBeY15SoMg3hFnGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=joY/wbyTIeSmGEmtUawy0oMJ2TPUdIuhMPNCWIuwXusHYAO7HvA1ZkOSWU5qatiRu Iiht8AM1FFsQL3/cYUDz8MbieAt/F6vU2Bac1CwuEVeo4DXzpxQSRsLtbblboH+0NV 04P/X+H3XC6+FZ98v8mT0qq3Me/xFgCVZuKAlMBg= 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 6.17 432/849] net: nfc: nci: Increase NCI_DATA_TIMEOUT to 3000 ms Date: Tue, 11 Nov 2025 09:40:02 +0900 Message-ID: <20251111004546.877447933@linuxfoundation.org> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251111004536.460310036@linuxfoundation.org> References: <20251111004536.460310036@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.17-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 e180bdf2f82b0..664d5058e66e0 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