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 9BAEC42E43A; Mon, 31 Aug 2026 13:57:26 +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=1788184647; cv=none; b=VGmGVplrFx53FnIfqj7e7Ey2fP3+8Ei2gk4D4sr4pGXACkQZ5+Qb9nq/rbsiRtlhBJUMiY6jUGMtgSK7LtwMt3Wj0Vwoy6s7oBnlbFRCaS5uhZqUdpf+fIpXjPaqMOXNDSdql7oZLuDk75vFw9eEeUHIFzB6pAEiOclz87pIPrM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788184647; c=relaxed/simple; bh=J9M8vri8xaTJVvRhEQQE6LRvr/7eb0cCThxV2mbSyMU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=f/chmfqdLB0Hq1o52RqGpOgxYnwejD8/gRfN8zB3HuyWYFTnQWxUNk0KhC5gEChcF8wFVKKaGEZolDbslBwQzyceQl6NDoBiWqvzZKaiStmGs8OR0r93Ld2cLw8tft57Y45HjCFnURMRBEujWsFJc4bjgSKfj5r+JMlQR2L1FY0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Kb19jm0W; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Kb19jm0W" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A4E221F000E9; Mon, 31 Aug 2026 13:57:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788184646; bh=s3fKHItI+5yd+qNBiZsWRsJpDlRBrxN3z61IQdUcY9g=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Kb19jm0WUQOx8XQtkebutQpIzg29ijyIXLyQxCswFTEDxuZW3b+UlymgS6g3CExg7 QuSdeYgZH/1OLTOc7GWlVJMngHnBygk14el+sZDjcZe8ypUtCPGaf9AwcqxVFHW7kC VqLNTndIZHJlF2nbWCAfFY6IaQfm88UwO17a+aVg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thorsten Blum , Frank Li , Herbert Xu Subject: [PATCH 6.6 81/91] crypto: mxs-dcp - fix source scatterlist length access Date: Mon, 31 Aug 2026 15:35:09 +0200 Message-ID: <20260831133403.777239652@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260831133359.468089036@linuxfoundation.org> References: <20260831133359.468089036@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-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thorsten Blum commit c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8 upstream. mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y. Use the original scatterlist length instead. Fixes: 15b59e7c3733 ("crypto: mxs - Add Freescale MXS DCP driver") Cc: stable@vger.kernel.org Signed-off-by: Thorsten Blum Reviewed-by: Frank Li Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/mxs-dcp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/crypto/mxs-dcp.c +++ b/drivers/crypto/mxs-dcp.c @@ -333,7 +333,7 @@ static int mxs_dcp_aes_block_crypt(struc for_each_sg(req->src, src, sg_nents(req->src), i) { src_buf = sg_virt(src); - len = sg_dma_len(src); + len = src->length; tlen += len; limit_hit = tlen > req->cryptlen;