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 E4F5A43A80C; Mon, 31 Aug 2026 14:05:18 +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=1788185120; cv=none; b=UUO5BThS12QUbEC1kKSgHIG5Nq+Lfmbiocr0N8FOa7dWiq2T5In1ckfWUpkz0KfESj+lSnoDInkvHbvaa2jIArXhCp/CVk2Sg9axPN3Xkq6uGFpBoWGjDHMSUIpYdFgR6pP0OAezjD1Yw7QVuCeiLm2ClUPICJO/m4tMrBEp9rQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788185120; c=relaxed/simple; bh=ZmrFgR5kXcVhFOztXdV8w+rmIYJ8NxKb6F0RlIxrc28=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PKkkEhgDRSRrptfZ+jKAzdhQFdwkWWuhkxszWUutDwIP4bJIBBhL+v/u5fSoxbwneqJrQXwyhUraUUbwuxRsKrYeilnXYUAHeELSDEqsxbp4epadr2DhFHrQ1ZcftVsyhCrmBqeL6XLnHWWHUpTueMXOJ/e7QOvdP2VgtOaFUZs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=F/OolYQl; 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="F/OolYQl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4A1DE1F000E9; Mon, 31 Aug 2026 14:05:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788185118; bh=242lQfWEo2ZZN2OOrXo2mOwC1cMXttFfZYMdxM8n7zY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=F/OolYQlxYf95O4b73Kjx/U2Eqf005sDlzQSo8RxNE1646K/KdFcAWD1vYtpgcG54 VFA0pHmrFERd3ArqiEbaIMi63ab3/HcfZyIVsQ7iyo7f/6XKYx7gbkXKKa47NXTx3U MvJniWap7qVYJaQGBHy+wwAa7MuOqQZS23C8K/9Q= 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 5.15 59/69] crypto: mxs-dcp - fix source scatterlist length access Date: Mon, 31 Aug 2026 15:35:32 +0200 Message-ID: <20260831133401.693859712@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260831133358.601894154@linuxfoundation.org> References: <20260831133358.601894154@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 5.15-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;