From nobody Fri Dec 19 13:10:11 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9DA6AC4332F for ; Tue, 12 Dec 2023 19:54:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377325AbjLLTyG (ORCPT ); Tue, 12 Dec 2023 14:54:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233299AbjLLTyE (ORCPT ); Tue, 12 Dec 2023 14:54:04 -0500 Received: from mail-wm1-x32f.google.com (mail-wm1-x32f.google.com [IPv6:2a00:1450:4864:20::32f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D06E8A6 for ; Tue, 12 Dec 2023 11:54:09 -0800 (PST) Received: by mail-wm1-x32f.google.com with SMTP id 5b1f17b1804b1-40c2308faedso62660065e9.1 for ; Tue, 12 Dec 2023 11:54:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1702410848; x=1703015648; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=JvZSnb3frgLpz0T6ZYUyMh/rwMmfERMcSWI4MbVdOSg=; b=p//1Jm1aiKjuy56MVZ68YNmdwJRP31bLSUjEsqLMVgRlfb7av6pjVy2u7Vk4kQ/LFi 9qr5jfisGQSZA63Pl41EqL0kR46jYFTkmHaO2HuVHtPFYT9tJGp159e6jFqp+9wcseCl DTWxCk4FniYgyf7QXxk78U2ttbYUZG+rMhgrtsZCoHsCNcpwXsSSbEUM2M5XZkqneDMa Ih+fSMqlVNXDH622RbYO5bOEuKTC10i1rGVawgY2422T3gfzxpj15XMTeMHHqc3IZbqJ 6IxS3zLLk7xHi0JqKztT6BOF5veaDQi4YzZ06FqygV1b9OXJBqCaZAqAZTQLigF0HkEi CFcA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702410848; x=1703015648; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=JvZSnb3frgLpz0T6ZYUyMh/rwMmfERMcSWI4MbVdOSg=; b=W5okq8+wOa+H/QNPxxsJOC/a6YWqL76iXXWi30BOyAy6+p/zAwxY+gK5m6JFs7LdNQ uYilYXS6gcvuC02x/EPKLcvQFLh2N3sBBxnX/AU18qd2W7+GlR5ktcI9iclF9xP/ZhUM Bje/sN0zDVz0TFAg+gbrltkrRXaN51TCGqZxPfRrwHezuXJcs/oVsa4owGFln1IPcWu0 eqNykeYy9PiOm/+wOdj6tgzt4YNoUzgErm8lJlRk97qtNyrzTGhF/lEP4JqqbiWbJXHS A6z/3Xd9UO/ong6/QKrpGPhX5uFFy+Tbgpqy0D8Q0rv3faL1lktuLNeIxEH+bc0CsQSu qdWQ== X-Gm-Message-State: AOJu0YxTvZq4sB/NfCLq+z3Sh9EQfZrEOisZIMTYeuI+k3Y7O2AxY+Kr WBKSXz8Xm9lATZBs8s43IztxbA== X-Google-Smtp-Source: AGHT+IFX8nhEI0rbRpXhN/yjpVG2jYdKFpfLKOx+8sbynBMkPhmvV7Er0fQU4K1nNgFwq+Xh7r9xLQ== X-Received: by 2002:a05:600c:2a41:b0:40c:32f1:816b with SMTP id x1-20020a05600c2a4100b0040c32f1816bmr3121626wme.162.1702410848328; Tue, 12 Dec 2023 11:54:08 -0800 (PST) Received: from alex-rivos.ba.rivosinc.com (amontpellier-656-1-456-62.w92-145.abo.wanadoo.fr. [92.145.124.62]) by smtp.gmail.com with ESMTPSA id e12-20020a05600c4e4c00b0040b398f0585sm17973419wmq.9.2023.12.12.11.54.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Dec 2023 11:54:07 -0800 (PST) From: Alexandre Ghiti To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: syzbot+afb726d49f84c8d95ee1@syzkaller.appspotmail.com Subject: [PATCH -fixes v2] riscv: Fix wrong usage of lm_alias() when splitting a huge linear mapping Date: Tue, 12 Dec 2023 20:54:00 +0100 Message-Id: <20231212195400.128457-1-alexghiti@rivosinc.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" lm_alias() can only be used on kernel mappings since it explicitly uses __pa_symbol(), so simply fix this by checking where the address belongs to before. Fixes: 311cd2f6e253 ("riscv: Fix set_memory_XX() and set_direct_map_XX() by= splitting huge linear mappings") Reported-by: syzbot+afb726d49f84c8d95ee1@syzkaller.appspotmail.com Closes: https://lore.kernel.org/linux-riscv/000000000000620dd0060c02c5e1@go= ogle.com/ Signed-off-by: Alexandre Ghiti Reviewed-by: Charlie Jenkins --- Changes in v2: - Fix llvm warning about unitialized return value arch/riscv/mm/pageattr.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index fc5fc4f785c4..96cbda683936 100644 --- a/arch/riscv/mm/pageattr.c +++ b/arch/riscv/mm/pageattr.c @@ -305,8 +305,13 @@ static int __set_memory(unsigned long addr, int numpag= es, pgprot_t set_mask, goto unlock; } } else if (is_kernel_mapping(start) || is_linear_mapping(start)) { - lm_start =3D (unsigned long)lm_alias(start); - lm_end =3D (unsigned long)lm_alias(end); + if (is_kernel_mapping(start)) { + lm_start =3D (unsigned long)lm_alias(start); + lm_end =3D (unsigned long)lm_alias(end); + } else { + lm_start =3D start; + lm_end =3D end; + } =20 ret =3D split_linear_mapping(lm_start, lm_end); if (ret) --=20 2.39.2