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 2E6AB1F941 for ; Fri, 21 Jul 2023 16:17:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A362BC433C8; Fri, 21 Jul 2023 16:17:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689956272; bh=NoJ2NKdqLQA7IKSwiojgIsg3ZlTlviPpkJnQ7NbdBHE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e/iiBTZm2+qyw2/AUWze1jR6Pk2TyGMpf3wkdhpcTW/7XSMYxf+9BMlFy/xH9yUtX nDv8i7cUWlgoPUKdWv9iqPIYNuDSftFdrxzSdgDm7ceX2eJ5UMeeOkuLuhifDrbjrL zAYs6OnWnEuLus7caYgg/BGIGxCyxJrh3grPIYEI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stable@vger.kernel.org, Arseniy Krasnov , Miquel Raynal Subject: [PATCH 6.4 133/292] mtd: rawnand: meson: fix unaligned DMA buffers handling Date: Fri, 21 Jul 2023 18:04:02 +0200 Message-ID: <20230721160534.548819100@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721160528.800311148@linuxfoundation.org> References: <20230721160528.800311148@linuxfoundation.org> User-Agent: quilt/0.67 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 From: Arseniy Krasnov commit 98480a181a08ceeede417e5b28f6d0429d8ae156 upstream. Meson NAND controller requires 8 bytes alignment for DMA addresses, otherwise it "aligns" passed address by itself thus accessing invalid location in the provided buffer. This patch makes unaligned buffers to be reallocated to become valid. Fixes: 8fae856c5350 ("mtd: rawnand: meson: add support for Amlogic NAND flash controller") Cc: Signed-off-by: Arseniy Krasnov Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20230615080815.3291006-1-AVKrasnov@sberdevices.ru Signed-off-by: Greg Kroah-Hartman --- drivers/mtd/nand/raw/meson_nand.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/mtd/nand/raw/meson_nand.c +++ b/drivers/mtd/nand/raw/meson_nand.c @@ -76,6 +76,7 @@ #define GENCMDIADDRH(aih, addr) ((aih) | (((addr) >> 16) & 0xffff)) #define DMA_DIR(dir) ((dir) ? NFC_CMD_N2M : NFC_CMD_M2N) +#define DMA_ADDR_ALIGN 8 #define ECC_CHECK_RETURN_FF (-1) @@ -842,6 +843,9 @@ static int meson_nfc_read_oob(struct nan static bool meson_nfc_is_buffer_dma_safe(const void *buffer) { + if ((uintptr_t)buffer % DMA_ADDR_ALIGN) + return false; + if (virt_addr_valid(buffer) && (!object_is_on_stack(buffer))) return true; return false;