From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 93964C77B7C for ; Wed, 10 May 2023 11:14:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Z+qd4oK/0Kha4C2yILwcMjsuf/7YJ4cqloKvpO1VF8s=; b=PLZkA0ZhrQiKPi VY3Ju6ccS3hzv+k/uAKL6L5b8pBRhkvYLl9v6FuCeZwalEAoxSt9z3G1LPamegmOauf+UEeHWB7vo pova+aKHB+n9+IHJa+zCEOxHJxvdTcAbiFTgfzLUzBmLHJDegUs9aDLx9JSWciOKXtLXi9NJZueP5 X/y6m0pAv7zLPfwxx1hAv3rbdHfgRtKgEMqu1vjAHccG75+YQJhj4gS7gX6yFNYx3X84rgyjD8KpX hIGnrjQLWrunkWFEH1clOmM9wiM8r41vqq1ZZy8MEszVR4DKGzKrIKJtVACZ0Z2X8usV4lZ/yXvsZ iFknOpagciV+zeK52eVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pwhle-005zHg-32; Wed, 10 May 2023 11:13:58 +0000 Received: from mx.sberdevices.ru ([45.89.227.171]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pwhlU-005z8Q-1Y; Wed, 10 May 2023 11:13:50 +0000 Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mx.sberdevices.ru (Postfix) with ESMTP id 793D15FD25; Wed, 10 May 2023 14:13:46 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1683717226; bh=t19ScH83QlOV2MoLDXmhWB2urLyNhAs8wD4po+eanN4=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=AtGeo1BpEMLlVbwYhweKX4DFHWzRug4w9xBqGr0l6LmSNocnqgfq02B2X28xNAxtj J6CugNMTQyz8Mt+DSueaXl7HFXeIISOyaz4GY62G4Runx2t0biadIXT2S3e+l+0/mi TMaUfEPzTZ20jrIZzY9+ANVCkTWRs0lSqYITD6fSEE5/xzoN4znMZijXHUM9CIOCZK VejqI5PFJ3JhENwm8MkqClJKDk+gaP/nptOGr3AsxNEhVmLEfwVb5ObM4TQKzUhR6S bb3liHAXo4xIlHeWumfIwXs73qFKIRw9IdEITf8eUxBXefNYc52WHsuR0/RvV5vNyu jncobylzRLf/Q== Received: from S-MS-EXCH01.sberdevices.ru (S-MS-EXCH01.sberdevices.ru [172.16.1.4]) by mx.sberdevices.ru (Postfix) with ESMTP; Wed, 10 May 2023 14:13:46 +0300 (MSK) From: Arseniy Krasnov To: Liang Yang , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Jianxin Pan , Yixun Lan CC: , , Arseniy Krasnov , , , , Subject: [PATCH v3 4/6] mtd: rawnand: meson: check buffer length Date: Wed, 10 May 2023 14:08:32 +0300 Message-ID: <20230510110835.26115-5-AVKrasnov@sberdevices.ru> X-Mailer: git-send-email 2.35.0 In-Reply-To: <20230510110835.26115-1-AVKrasnov@sberdevices.ru> References: <20230510110835.26115-1-AVKrasnov@sberdevices.ru> MIME-Version: 1.0 X-Originating-IP: [172.16.1.6] X-ClientProxiedBy: S-MS-EXCH01.sberdevices.ru (172.16.1.4) To S-MS-EXCH01.sberdevices.ru (172.16.1.4) X-KSMG-Rule-ID: 4 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Status: not scanned, disabled by settings X-KSMG-AntiSpam-Interceptor-Info: not scanned X-KSMG-AntiPhishing: not scanned, disabled by settings X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 1.1.2.30, bases: 2023/05/10 09:03:00 #21252424 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230510_041348_869831_056B9317 X-CRM114-Status: GOOD ( 14.24 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org This NAND controller has limited buffer length, so check it before command execution to avoid length trim. Also check MTD write size on chip attach. Signed-off-by: Arseniy Krasnov --- drivers/mtd/nand/raw/meson_nand.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c index 331377a2c5dc..ed7ec1bfd07e 100644 --- a/drivers/mtd/nand/raw/meson_nand.c +++ b/drivers/mtd/nand/raw/meson_nand.c @@ -111,6 +111,8 @@ #define NFC_USER_BYTES 2 #define NFC_OOB_PER_ECC(nand) ((nand)->ecc.bytes + NFC_USER_BYTES) +#define NFC_CMD_RAW_LEN GENMASK(13, 0) + struct meson_nfc_nand_chip { struct list_head node; struct nand_chip nand; @@ -284,7 +286,7 @@ static void meson_nfc_cmd_access(struct nand_chip *nand, int raw, bool dir, if (raw) { len = mtd->writesize + mtd->oobsize; - cmd = (len & GENMASK(13, 0)) | scrambler | DMA_DIR(dir); + cmd = len | scrambler | DMA_DIR(dir); writel(cmd, nfc->reg_base + NFC_REG_CMD); return; } @@ -562,6 +564,9 @@ static int meson_nfc_read_buf(struct nand_chip *nand, u8 *buf, int len) u32 cmd; u8 *info; + if (len > NFC_CMD_RAW_LEN) + return -EINVAL; + info = kzalloc(PER_INFO_BYTE, GFP_KERNEL); if (!info) return -ENOMEM; @@ -571,7 +576,7 @@ static int meson_nfc_read_buf(struct nand_chip *nand, u8 *buf, int len) if (ret) goto out; - cmd = NFC_CMD_N2M | (len & GENMASK(13, 0)); + cmd = NFC_CMD_N2M | len; writel(cmd, nfc->reg_base + NFC_REG_CMD); meson_nfc_drain_cmd(nfc); @@ -590,12 +595,15 @@ static int meson_nfc_write_buf(struct nand_chip *nand, u8 *buf, int len) int ret = 0; u32 cmd; + if (len > NFC_CMD_RAW_LEN) + return -EINVAL; + ret = meson_nfc_dma_buffer_setup(nand, buf, len, NULL, 0, DMA_TO_DEVICE); if (ret) return ret; - cmd = NFC_CMD_M2N | (len & GENMASK(13, 0)); + cmd = NFC_CMD_M2N | len; writel(cmd, nfc->reg_base + NFC_REG_CMD); meson_nfc_drain_cmd(nfc); @@ -1328,6 +1336,7 @@ static int meson_nand_attach_chip(struct nand_chip *nand) struct meson_nfc_nand_chip *meson_chip = to_meson_nand(nand); struct mtd_info *mtd = nand_to_mtd(nand); int nsectors = mtd->writesize / 1024; + int raw_writesize; int ret; if (!mtd->name) { @@ -1339,6 +1348,13 @@ static int meson_nand_attach_chip(struct nand_chip *nand) return -ENOMEM; } + raw_writesize = mtd->writesize + mtd->oobsize; + if (raw_writesize > NFC_CMD_RAW_LEN) { + dev_err(nfc->dev, "too big write size in raw mode: %d > %ld\n", + raw_writesize, NFC_CMD_RAW_LEN); + return -EINVAL; + } + if (nand->bbt_options & NAND_BBT_USE_FLASH) nand->bbt_options |= NAND_BBT_NO_OOB; -- 2.35.0 _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic