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 4B5EB10854AA for ; Sat, 14 Mar 2026 22:30:00 +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:Message-ID:Date:Subject:To :From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=72tDSEWdEDNVwDvbu3DItr822VitwGtx+sm7izPBj+4=; b=P6ci1w3QGxPJdb 074DkJsce+yN0v66UCIYUEAePpoxTpTdkqneizHdAXZ6HivyEU+IN1o8dOSfpdACHKAne+mDs04JS lT9uRu3mPxQ84c4HNz2plDimqJZ/ijZRzWhpyL1yc3ag03LP85Wj0uhuVl4Wgxjl19kluQTFTRz9N z249W4CzZ88qIkgZZvxEJoantrchuMgf6bPlfWN8DdDjMzek9qSSTnZnK64mEhP2GuD9p5JaFxThy Ngf13xEkdxgAdVPzmxcPVriDhTRQ4EZEdbSyEkVzvvxXHNbIazAc632nnjGEH/JzFBSnFlPIIoqAx hJJejg/C2SywTfpEKbTg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w1XUP-00000002D3e-20SO; Sat, 14 Mar 2026 22:29:45 +0000 Received: from mail-wr1-x435.google.com ([2a00:1450:4864:20::435]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w1XUM-00000002D3J-1RFM for linux-riscv@lists.infradead.org; Sat, 14 Mar 2026 22:29:43 +0000 Received: by mail-wr1-x435.google.com with SMTP id ffacd0b85a97d-43b3cfc38edso445634f8f.3 for ; Sat, 14 Mar 2026 15:29:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1773527379; x=1774132179; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:from:to:cc:subject:date:message-id:reply-to; bh=jrFd10CMHTUngJ+QOak22idMJWYggdJEidQTQ1ilrUk=; b=DvjlUAYMoqb3sC6MIIMPXVyvPiJeCnVeKY1ONsCftkCQeNxx9C1QJB1h6U7PS8oZld OHZPTLdvp+sVNk4nAW/S8iB9WymUoiksiNpVGeTgoF+o+fNpLG9peQHLiIXThzqw+qXg XiviB9vmlyW5r/nhXqUnoRpetJedspw5gkn4MprtCwAnAm9wiYvG+LdiYRrhTlfN3f9k MF5oMXy3hvGaFU+POfWoRxf1mxcgFHZdwQNL8/ftg2gHn0AI7Hh40oBMeOiywwpoA/GS XxrhY0pWC7q+B8HJ8h6eS7sxZxuj4X6nbbzVzJQ9dK2mfSveN08VYPXXxPoaqgRepnXU 4mKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773527379; x=1774132179; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=jrFd10CMHTUngJ+QOak22idMJWYggdJEidQTQ1ilrUk=; b=mZLY0JUoQolyImZMarQvYgeDhtWdEq8F0gajRLDFmzxqN+mPvJsrXwE6xWtbzGz1Yj Vk/HQBIB8mjyBGb8vcv/IpGEptVHjdelggPtWcM6K1Flz7VzjxTpKO9uOIfxksBB5GtA 2KFpKJx2mYecVz04LrV/KHH7Dwy/K9a8NeEIPAMcUs6zzDI5IjoKWTh9IgLJcFxN+kj2 Mpi9x4/Ed2PG9el1m9M/tP/UviB4syaMqj7B25FPD5iTui37PwxjyOhiWxJ/aBQrOcf+ 08FD7EJOpkCicYiX3HA+OQYbUsgL0COTWCgtsOPLiG77Ifk3Zpw66IjVAls8wzKpd6ef F/KA== X-Forwarded-Encrypted: i=1; AJvYcCWy+BVbfYcr0fVnnkw2CoewH7N3Vae+vfD3yNysKsH0YiEBpfK61397XWwgbYbNXPlFxmhnmgNYDf13Og==@lists.infradead.org X-Gm-Message-State: AOJu0Ywyob2mgFcqDGryxhqKaQmJSN6z+/0T+caHsUccyy92bnJpBI7Y /i6bHDUqoq3TCXa8vr3DxPy1QVNvTKWQuqkA5AyH6Ap51v2QNbauNw0g X-Gm-Gg: ATEYQzwSFE0+t59NX3f6MxERV8KEAicHWzxdG0DFXJK/htizPK+b3RnToDRS3JraGFa xYS2Hw+EJvs3azSiBrwuAUSoMoTeb/AEgmU82ZO29VFFnsjXR9WJBtCi4ttocm2HZHh9Gx/kiwk N3wNOX8cNgvEWpIi5qLu9lYaxAerPPDCUfn+HFHF68vCwYuQyqk5DbbdrAZsJXD4MmaNrPQXzKi pLjAg9wluB1qozhAIHUfVfJKPelkHQrs2FE8jovHfvOaLjA+wabDzbfNujYnoMb7V43SB5YV8qK bIv/uq/X+0YaNqrko5NZPlqmsy0UpOBwkH9WNRlJjL7LSR3uV4lvYgIrosMP4iJXeUbPZhjed+Q EEtcQpvtU5R69v7ek2OnOTnCO6LS0jxYN+0957sVEyTpp7bCDVeKk/Pk0OsBR62+FN5Z286w4W8 xF+zo/ppnCzTc0M3BKDhaJlp/JfX3Nf8h6InKOvDoKjbkgJAEb7C/qTm3Jlxk= X-Received: by 2002:a05:6000:1863:b0:439:bce5:6519 with SMTP id ffacd0b85a97d-43a04dc0849mr14418218f8f.39.1773527379315; Sat, 14 Mar 2026 15:29:39 -0700 (PDT) Received: from osama.. ([41.238.114.180]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-439fe20c0b4sm31185193f8f.25.2026.03.14.15.29.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Mar 2026 15:29:38 -0700 (PDT) From: Osama Abdelkader To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Suren Baghdasaryan , Lorenzo Stoakes , Oscar Salvador , Andrew Morton , Qi Zheng , Osama Abdelkader , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] riscv: mm: add null check for find_vm_area in set_memory Date: Sat, 14 Mar 2026 23:28:14 +0100 Message-ID: <20260314222815.153203-1-osama.abdelkader@gmail.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260314_152942_388111_2B574FC0 X-CRM114-Status: GOOD ( 10.05 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org find_vm_area() can return NULL. Add a null check to avoid potential null pointer dereference, matching the pattern used by other arches. Signed-off-by: Osama Abdelkader --- arch/riscv/mm/pageattr.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index 3f76db3d2769..46a999c86b26 100644 --- a/arch/riscv/mm/pageattr.c +++ b/arch/riscv/mm/pageattr.c @@ -289,6 +289,10 @@ static int __set_memory(unsigned long addr, int numpages, pgprot_t set_mask, int i, page_start; area = find_vm_area((void *)start); + if (!area) { + ret = -EINVAL; + goto unlock; + } page_start = (start - (unsigned long)area->addr) >> PAGE_SHIFT; for (i = page_start; i < page_start + numpages; ++i) { -- 2.43.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv