From patchwork Mon Nov 16 08:44:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzung-Bi Shih X-Patchwork-Id: 11907761 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 047E6138B for ; Mon, 16 Nov 2020 08:45:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D098D221F9 for ; Mon, 16 Nov 2020 08:45:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="GXgOGre7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727812AbgKPIoh (ORCPT ); Mon, 16 Nov 2020 03:44:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47446 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727716AbgKPIog (ORCPT ); Mon, 16 Nov 2020 03:44:36 -0500 Received: from mail-qt1-x849.google.com (mail-qt1-x849.google.com [IPv6:2607:f8b0:4864:20::849]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 83DEFC0613CF for ; Mon, 16 Nov 2020 00:44:36 -0800 (PST) Received: by mail-qt1-x849.google.com with SMTP id c2so9725876qtx.3 for ; Mon, 16 Nov 2020 00:44:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=U1SYL24RcTv9N7iT3p8Gk3jg0reoXyBjPpMVxH+Yb2c=; b=GXgOGre7Vz7fMb34bNE5Fnr0Fuz4xu004X0MvPHy3/ZVL+bYlIvBjrV+j3YFiM1CTK mJkoYwcw3HaG/wFWu+8a8eNgFdyZ+lugSDUKxpy2+KE2NszFF0T4QCsaW2mRSU0o1cr0 L4JjnBcgjutYdsDlHwx8ar2SgdZzcFlAMC8payn3TF3SmxFFyMHRpVKYKwva/yq8awSr wVcZ3GEscUwsETAU+tAXkq1+65Jv1of7kB0ZGMYWCVf5FwPvBffxwIrF+WOJpVYS0v3R 7yr57qXUpXc/ywOqBLbco3E3QgGAYb4X9rQf2/4JaE+1hQFmMa8LP0vowZgbRmzD8ypy 08bw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=U1SYL24RcTv9N7iT3p8Gk3jg0reoXyBjPpMVxH+Yb2c=; b=YScpFg01ddQ0XEhafj7nRc/TEaQe4mW3A0F1NcBBrCLrNJ1uq0PQQLHV18BPxMvsPJ U07n0SHzJuxJSMylWUEAB4mx4s5GE3sJT/HtsHz7GvDe/YQBms8IGT5Jb28c98/sa5yK xW+KOC/8CnRq3GfxrZjvk01XdcuKSTRMuNgf6MQu1GnXFimYJlYkoNmFMNttjg3pRqVl u4NKHeV1lzBT3TjexKU0CSYkCdnJhjg32HzeRQtAW8TAGfjxdQ4mUn/x8uNePgA7vGxH 0iJDg2hY7oUo2566ZAp4n7T4K3IGd7ZRl9DfyDajt3HC26wooHhRfDIcaVtUBHKvkPnc mHuQ== X-Gm-Message-State: AOAM5329ipDpolWq+Q346NRCeRW56qB8Vm75SH4yFTUM30O5VNy+vJkj qmff20wtItb5N3m+u8j+hUvXP8TUidsJ X-Google-Smtp-Source: ABdhPJzhbiY6OL3SEP4f5SvcBbQqzn20Wueip3Hg4YPjnhhPTZC1kw4E3QbluKfoOYm2U9VaaZ7MgAacn1oH Sender: "tzungbi via sendgmr" X-Received: from tzungbi-z840.tpe.corp.google.com ([2401:fa00:1:b:725a:fff:fe41:c6a5]) (user=tzungbi job=sendgmr) by 2002:a0c:a8c4:: with SMTP id h4mr404502qvc.58.1605516275666; Mon, 16 Nov 2020 00:44:35 -0800 (PST) Date: Mon, 16 Nov 2020 16:44:11 +0800 In-Reply-To: <20201116084413.3312631-1-tzungbi@google.com> Message-Id: <20201116084413.3312631-2-tzungbi@google.com> Mime-Version: 1.0 References: <20201116084413.3312631-1-tzungbi@google.com> X-Mailer: git-send-email 2.29.2.299.gdc1121823c-goog Subject: [PATCH v2 1/3] remoteproc/mediatek: fix boundary check From: Tzung-Bi Shih To: ohad@wizery.com, bjorn.andersson@linaro.org Cc: linux-remoteproc@vger.kernel.org, matthias.bgg@gmail.com, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, pihsun@chromium.org, tzungbi@google.com Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org It is valid if offset+length == sram_size. For example, sram_size=100, offset=99, length=1. Accessing offset 99 with length 1 is valid. Signed-off-by: Tzung-Bi Shih Reviewed-by: Mathieu Poirier --- drivers/remoteproc/mtk_scp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index a1e23b5f19b9..0abbeb62cf43 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -408,11 +408,11 @@ static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len) if (da < scp->sram_size) { offset = da; - if (offset >= 0 && (offset + len) < scp->sram_size) + if (offset >= 0 && (offset + len) <= scp->sram_size) return (void __force *)scp->sram_base + offset; } else if (scp->dram_size) { offset = da - scp->dma_addr; - if (offset >= 0 && (offset + len) < scp->dram_size) + if (offset >= 0 && (offset + len) <= scp->dram_size) return scp->cpu_addr + offset; }