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[209.132.180.67]) by mx.google.com with ESMTP id t25si1449428oic.183.2020.03.06.07.12.20; Fri, 06 Mar 2020 07:12:37 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@c-s.fr header.s=mail header.b=CsEmQFb4; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727026AbgCFPJm (ORCPT + 99 others); Fri, 6 Mar 2020 10:09:42 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:16254 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726182AbgCFPJm (ORCPT ); Fri, 6 Mar 2020 10:09:42 -0500 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 48Yrcz5Y9Xz9tyYp; Fri, 6 Mar 2020 16:09:39 +0100 (CET) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=CsEmQFb4; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id sGjbpDJnAcHu; Fri, 6 Mar 2020 16:09:39 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 48Yrcz4W9mz9tyYk; Fri, 6 Mar 2020 16:09:39 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1583507379; bh=MVNuZpG6BlWDuNhIvH1ckycgX1wgPx0zDvL/lDwnCNc=; h=From:Subject:To:Cc:Date:From; b=CsEmQFb4X6Tbc6k5DtVedZanARcpnDgkQDNqGeC6/fetCd9uc5X7zjNEqk2r224Or G7rFJTXIyixOSuDtVEj28XouCkYR0U7EqgD+mziOs+wg+XGyjig4yW/VhI5Ta/CqwG S20WdZBZsaCUYm1WxOgBHXGXuCVqyq+FWIV0cfZc= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 135198B88B; Fri, 6 Mar 2020 16:09:41 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id Pdcl8IxPPNJn; Fri, 6 Mar 2020 16:09:41 +0100 (CET) Received: from pc16570vm.idsi0.si.c-s.fr (po15451.idsi0.si.c-s.fr [172.25.230.100]) by messagerie.si.c-s.fr (Postfix) with ESMTP id E05FC8B89A; Fri, 6 Mar 2020 16:09:40 +0100 (CET) Received: by pc16570vm.idsi0.si.c-s.fr (Postfix, from userid 0) id B5E0F65470; Fri, 6 Mar 2020 15:09:40 +0000 (UTC) Message-Id: <4e7b56865e01569058914c991143f5961b5d4719.1583507333.git.christophe.leroy@c-s.fr> From: Christophe Leroy Subject: [PATCH] powerpc/kasan: Fix kasan_remap_early_shadow_ro() To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Fri, 6 Mar 2020 15:09:40 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org At the moment kasan_remap_early_shadow_ro() does nothing, because k_end is 0 and k_cur < 0 is always true. Change the test to k_cur != k_end, as done in kasan_init_shadow_page_tables() Signed-off-by: Christophe Leroy Fixes: cbd18991e24f ("powerpc/mm: Fix an Oops in kasan_mmu_init()") Cc: stable@vger.kernel.org --- arch/powerpc/mm/kasan/kasan_init_32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c index f19526e7d3dc..1a29cf469903 100644 --- a/arch/powerpc/mm/kasan/kasan_init_32.c +++ b/arch/powerpc/mm/kasan/kasan_init_32.c @@ -101,7 +101,7 @@ static void __init kasan_remap_early_shadow_ro(void) kasan_populate_pte(kasan_early_shadow_pte, prot); - for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) { + for (k_cur = k_start & PAGE_MASK; k_cur != k_end; k_cur += PAGE_SIZE) { pmd_t *pmd = pmd_ptr_k(k_cur); pte_t *ptep = pte_offset_kernel(pmd, k_cur); -- 2.25.0