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 1CDE6E9904F for ; Fri, 10 Apr 2026 07:42:42 +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:In-Reply-To:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=9ZjD20nPYfQ3EopmFcrTK3T3DqtuuftiR8P7fA60BUw=; b=CRzRpWwd+TcEYA WIxvIsS0kqclbyZGAYCYmDBHkMOKe6beyC+ub5JjMcqSh+Nf0+gORio6WGh+nPBu1xq9VOLtTUhL7 umnARHwiXas4BLF3w+oMaiamO2Sxm+qNeT3uIQOA9Zh//5Z0AG+c1sKkfOTuj7MTL0wDpcn0PMmyD 8dm6l2MvqKqjF7+ZzX5BOx2zB3Lj6cLXvf7VYuBkPzYckA2ZlciI+i5Cz2xcdJBo13qm8eMblt24+ JXLl+5DPlG2OrIp3iqdF9OUW59s9Ck4Pt5wAum47I1D6Cp5zVE04aMRgjlxiNQqmoFLxHkkN5ABNJ 0BmFqTEe1S3ZhhJTaA/g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wB6Vf-0000000Bm9U-40uk; Fri, 10 Apr 2026 07:42:35 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wB6Vf-0000000Bm9H-1VDs for linux-riscv@lists.infradead.org; Fri, 10 Apr 2026 07:42:35 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 7972B60141; Fri, 10 Apr 2026 07:42:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95FEBC19424; Fri, 10 Apr 2026 07:42:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775806954; bh=hQEK5B+09TH3hB6G8BbCrNjCMFs2zQm4NBC7Qt/Xwmw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=o1Q70DAHbF9ymHI+DDlrLqozCWoAs3VQ6stb0XlLNxQjwPl5an4pJnjexXoVdPlVh x+ktMQQ90GLDgz/prtL3i8IhOwqAip9Iy5rxXrYDACUq3yaLwN2tRGLTI2o9ipID8z Z8ILXJ+xP5Al51T2KOxvFqB/xt++gB2XfpElG4ZXysB3L9lsOw4C5gPoUk67tn2BAg k6QbzqF7ftzTEv/lxC/yIum5Y6PHva3y2En7I7bK7gWEL3W2LrA9mrNpDfxpviXBj8 sgTxoqQfHMauB+SjScKfwTaNWQKkzMEAf1OphnbQvKJbMIsQjJ6lGLSowx8OnI77uT 2hGj7EkbOoBsg== Message-ID: Date: Fri, 10 Apr 2026 09:42:26 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/5] riscv: mm: Fix NULL pointer dereference in __set_memory To: Michael Neuling Cc: =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= , "Mike Rapoport (Microsoft)" , "Vishal Moola (Oracle)" , Albert Ou , Aleksa Paunovic , Aleksandar Rikalo , Alexandre Ghiti , Andrew Jones , Andrew Morton , Arnd Bergmann , Djordje Todorovic , Guo Ren , Junhui Liu , Kevin Brodsky , Lorenzo Stoakes , Nam Cao , Oleg Nesterov , Oscar Salvador , Palmer Dabbelt , Paul Walmsley , Qinglin Pan , Raj Vishwanathan4 , linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org References: <20260409091143.1348853-1-mikey@neuling.org> <20260409091143.1348853-4-mikey@neuling.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 4/10/26 08:23, Michael Neuling wrote: >>> 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) { >> >> Which caller would end up calling __set_memory() in such a way? > > It wouldn't. You're right on this and the other two. Sorry for the noise. Slopped-by: Cursor:claude-4.6-opus-high-thinking :) Patch #1 seems reasonable (although non-critical); not sure about patch #2, leaving both to Risc-V people! -- Cheers, David _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv