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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76D77C43331 for ; Tue, 24 Mar 2020 10:52:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4967E208E0 for ; Tue, 24 Mar 2020 10:52:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585047173; bh=28FajiIpTyOHoigH0+DT2DHz/lzMkgmR1Jc1TPsX4sQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yNkoPWCXTHRnN5CJjtmo1BXW3QeRTr8XFqVe6ys9LUh9JTzmi4XS3W7kE0DsAimq2 VpwjrukR1yu25I6JUHeLSQgkjikOkwQc85OU2dsVm1TnSb2jlgq3bP5zVK5CX/9xCL 6F/GvHk8S/HQSRQLkc1s2t8fID3p7dRptbABFgPc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727304AbgCXKww (ORCPT ); Tue, 24 Mar 2020 06:52:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:32968 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726818AbgCXKwv (ORCPT ); Tue, 24 Mar 2020 06:52:51 -0400 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8ABE1208CA; Tue, 24 Mar 2020 10:52:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585047170; bh=28FajiIpTyOHoigH0+DT2DHz/lzMkgmR1Jc1TPsX4sQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MhEapYe0aCKi6JizZ1IklX+bhS+HoZkqodOna/Qaj6x3D3IrunRq97Hj4wBF8yZjg I2+cT3X7WOnClu4OzWb98T6d70hYsP2fq/8R72vswpKGQY0Z/Ku/NweoCdA21zPAni 0s83c/7g0V7V7QJUSZPEGJ7nw3+a0B5PVd1HEa/Q= From: Will Deacon To: linux-kernel@vger.kernel.org Cc: kernel-team@android.com, Will Deacon , "David S. Miller" , Peter Zijlstra , Nick Desaulniers , Matt Fleming , sparclinux@vger.kernel.org Subject: [PATCH 1/4] sparc32: mm: Fix argument checking in __srmmu_get_nocache() Date: Tue, 24 Mar 2020 10:40:02 +0000 Message-Id: <20200324104005.11279-2-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200324104005.11279-1-will@kernel.org> References: <20200324104005.11279-1-will@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The 'size' argument to __srmmu_get_nocache() is a number of bytes not a shift value, so fix up the sanity checking to treat it properly. Cc: "David S. Miller" Cc: Peter Zijlstra Signed-off-by: Will Deacon --- arch/sparc/mm/srmmu.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c index f56c3c9a9793..a19863cac0c4 100644 --- a/arch/sparc/mm/srmmu.c +++ b/arch/sparc/mm/srmmu.c @@ -175,18 +175,18 @@ pte_t *pte_offset_kernel(pmd_t *dir, unsigned long address) */ static void *__srmmu_get_nocache(int size, int align) { - int offset; + int offset, minsz = 1 << SRMMU_NOCACHE_BITMAP_SHIFT; unsigned long addr; - if (size < SRMMU_NOCACHE_BITMAP_SHIFT) { + if (size < minsz) { printk(KERN_ERR "Size 0x%x too small for nocache request\n", size); - size = SRMMU_NOCACHE_BITMAP_SHIFT; + size = minsz; } - if (size & (SRMMU_NOCACHE_BITMAP_SHIFT - 1)) { - printk(KERN_ERR "Size 0x%x unaligned int nocache request\n", + if (size & (minsz - 1)) { + printk(KERN_ERR "Size 0x%x unaligned in nocache request\n", size); - size += SRMMU_NOCACHE_BITMAP_SHIFT - 1; + size += minsz - 1; } BUG_ON(align > SRMMU_NOCACHE_ALIGN_MAX); -- 2.20.1