From patchwork Mon Feb 15 15:26:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 383225 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 E6B56C433E0 for ; Mon, 15 Feb 2021 15:38:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AE04864DB1 for ; Mon, 15 Feb 2021 15:38:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231130AbhBOPiI (ORCPT ); Mon, 15 Feb 2021 10:38:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:50212 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231366AbhBOPhS (ORCPT ); Mon, 15 Feb 2021 10:37:18 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id ECC6A600EF; Mon, 15 Feb 2021 15:32:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1613403144; bh=ft/YBWz1t9UpptJmcSTd20AycxE77gRkYFZxdGCheSs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lVgdAeuT/cphymnYGk1HUBEEMlbjEKw1e+UtGds5VdSwcJdmMbcCm1clo3cOLnrBT m1xCz5NPbe92S77cvUrQPu3RzHNKAPiIHC0UcIMCCHQeK9BVnJXpgUq2El1f9ahXXr 4vjPcShFVcWiM9QLEeHgzzsPxbNOZXX/mcBcvGu0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexandre Ghiti , Atish Patra , Palmer Dabbelt , Sasha Levin Subject: [PATCH 5.10 037/104] riscv: virt_addr_valid must check the address belongs to linear mapping Date: Mon, 15 Feb 2021 16:26:50 +0100 Message-Id: <20210215152720.680761820@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210215152719.459796636@linuxfoundation.org> References: <20210215152719.459796636@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alexandre Ghiti [ Upstream commit 2ab543823322b564f205cb15d0f0302803c87d11 ] virt_addr_valid macro checks that a virtual address is valid, ie that the address belongs to the linear mapping and that the corresponding physical page exists. Add the missing check that ensures the virtual address belongs to the linear mapping, otherwise __virt_to_phys, when compiled with CONFIG_DEBUG_VIRTUAL enabled, raises a WARN that is interpreted as a kernel bug by syzbot. Signed-off-by: Alexandre Ghiti Reviewed-by: Atish Patra Signed-off-by: Palmer Dabbelt Signed-off-by: Sasha Levin --- arch/riscv/include/asm/page.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index 2d50f76efe481..64a675c5c30ac 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -135,7 +135,10 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x); #endif /* __ASSEMBLY__ */ -#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr))) +#define virt_addr_valid(vaddr) ({ \ + unsigned long _addr = (unsigned long)vaddr; \ + (unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \ +}) #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC