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 54316EA3C55 for ; Thu, 9 Apr 2026 12:38:19 +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:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=QRsMf4w4iFXWvSz0zN+MnQDdgnBFg3aXrkmPlk/Luyc=; b=TJnVU5ZTchINus CQHdY0LyVlLuYb10Hqqbkd9IVwXgV13ANQfYIwJQis2G8ahEBPWQ08M0x/tb1v5gNxPI2PuCPIcXp WgSD6NBJ/jRA+pBINaJd5yFO5MI6anOUNG09h1aljHk5td+tgT724rd0X/7LhqnJDaj5sTyrala8e HAZD6r50OsiE0pwyM1pf0fV2KGhhRetyqXfcvgmIeMWcH4koN5YUBDvOikNny/7sET/7V1j8qIruH SLEh2Kg7W0Z9ogtD+Y1Ts6WOCWC+zTcTxcVisswghMwKIa08DBjjSR9A+j+wAcoeS8mh4YYsl8+bn E3XttB57mo23t6/r4t3g==; 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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 4/9/26 11:11, Michael Neuling wrote: > find_vm_area() can return NULL if no vm_struct covers the given address. > The code immediately dereferences area->addr without a NULL check. > While is_vmalloc_or_module_addr() confirms the address falls within the > vmalloc/module address range, it does not guarantee the address belongs > to an active allocation, so find_vm_area() may still return NULL. > > Add the missing NULL check. > > Fixes: 311cd2f6e2 ("riscv: Fix set_memory_XX() and set_direct_map_XX() by splitting huge linear mappings") > Signed-off-by: Michael Neuling > Assisted-by: Cursor:claude-4.6-opus-high-thinking > --- > 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 3f76db3d27..46a999c86b 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) { Which caller would end up calling __set_memory() in such a way? -- Cheers, David _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv