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 X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 A5BABC48BDF for ; Fri, 18 Jun 2021 14:08:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 891256044F for ; Fri, 18 Jun 2021 14:08:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234257AbhFROKS (ORCPT ); Fri, 18 Jun 2021 10:10:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229782AbhFROKR (ORCPT ); Fri, 18 Jun 2021 10:10:17 -0400 Received: from ustc.edu.cn (email6.ustc.edu.cn [IPv6:2001:da8:d800::8]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 9ECB8C061574 for ; Fri, 18 Jun 2021 07:08:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mail.ustc.edu.cn; s=dkim; h=Received:Date:From:To:Cc:Subject: Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding; bh=6URVM7kwZFYoTQ0Jt4HvPCFsmhETjeMSlkHESOmiSxc=; b=KfvNmLF8rwEXo cWOT41SqhY1jGblyAPA7iScVIy6QG+c3DgJpp86miXZcOLjCZtG3jC02pi5+qJzz t1efEvqOjm2FDF/UTmfwjLTuevCQ0qrXe7f+b4oirNxMmpPcQhcMAp5bxv9IjyfN f60WG9X846ZeliA1rLzYXnCi2RX5KA= Received: from xhacker (unknown [101.86.20.15]) by newmailweb.ustc.edu.cn (Coremail) with SMTP id LkAmygCHj1uTqMxgX_3+AA--.51710S2; Fri, 18 Jun 2021 22:07:15 +0800 (CST) Date: Fri, 18 Jun 2021 22:01:36 +0800 From: Jisheng Zhang To: Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: kasan-dev@googlegroups.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] riscv: kasan: Fix MODULES_VADDR evaluation due to local variables' name Message-ID: <20210618220136.21f32b98@xhacker> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-CM-TRANSID: LkAmygCHj1uTqMxgX_3+AA--.51710S2 X-Coremail-Antispam: 1UD129KBjvJXoW7KFyxtr18WFW5Kw17Cw18Grg_yoW8Wry3pr WDtF4rJrW5ZrsYgasrK34j9F1UJ3Z2ya4fJr1UAan8Aa98Crs0qrn8uFZ8ZryjgFWxu3WF yw4Fyry7Wr12y37anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkmb7Iv0xC_KF4lb4IE77IF4wAFF20E14v26r4j6ryUM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rw A2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xII jxv20xvEc7CjxVAFwI0_Cr0_Gr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I 8E87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI 64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8Jw Am72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IY64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1l 42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJV WUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAK I48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F 4UMIIF0xvE42xK8VAvwI8IcIk0rVWrZr1j6s0DMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF 0xvEx4A2jsIEc7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvjxU2xR6UUUUU X-CM-SenderInfo: xmv2xttqjtqzxdloh3xvwfhvlgxou0/ Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jisheng Zhang commit 2bfc6cd81bd1 ("riscv: Move kernel mapping outside of linear mapping") makes use of MODULES_VADDR to populate kernel, BPF, modules mapping. Currently, MODULES_VADDR is defined as below for RV64: | #define MODULES_VADDR (PFN_ALIGN((unsigned long)&_end) - SZ_2G) But kasan_init() has two local variables which are also named as _start, _end, so MODULES_VADDR is evaluated with the local variable _end rather than the global "_end" as we expected. Fix this issue by renaming the two local variables. Fixes: 2bfc6cd81bd1 ("riscv: Move kernel mapping outside of linear mapping") Signed-off-by: Jisheng Zhang --- arch/riscv/mm/kasan_init.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c index 55c113345460..d7189c8714a9 100644 --- a/arch/riscv/mm/kasan_init.c +++ b/arch/riscv/mm/kasan_init.c @@ -169,7 +169,7 @@ static void __init kasan_shallow_populate(void *start, void *end) void __init kasan_init(void) { - phys_addr_t _start, _end; + phys_addr_t p_start, p_end; u64 i; /* @@ -189,9 +189,9 @@ void __init kasan_init(void) (void *)kasan_mem_to_shadow((void *)VMALLOC_END)); /* Populate the linear mapping */ - for_each_mem_range(i, &_start, &_end) { - void *start = (void *)__va(_start); - void *end = (void *)__va(_end); + for_each_mem_range(i, &p_start, &p_end) { + void *start = (void *)__va(p_start); + void *end = (void *)__va(p_end); if (start >= end) break; -- 2.32.0