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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 81200C433E6 for ; Sat, 9 Jan 2021 10:34:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 54EC9239D1 for ; Sat, 9 Jan 2021 10:34:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726899AbhAIKeB (ORCPT ); Sat, 9 Jan 2021 05:34:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51540 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726375AbhAIKeA (ORCPT ); Sat, 9 Jan 2021 05:34:00 -0500 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71DE0C06179F for ; Sat, 9 Jan 2021 02:33:20 -0800 (PST) Received: by mail-pl1-x630.google.com with SMTP id e2so6998247plt.12 for ; Sat, 09 Jan 2021 02:33:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0xLmuarIgQdWn84D3wx5rQsfGRtDVE6UQliEht6Oq48=; b=tznSyNRiMyzItLUMQF6oR/88pqEwX9kk7kTQfKdCANR4RIg/jSGWow+vKdXCem/hFb 3hSA000zXc3fyKUBdl/ZjSgR2sEYKmFdqPf4S63Pq3QJjj+bNy413T645P3RQ23jgmVt 3J3FN8KfuLI2UcJsPN3IuNUC+xuBK2yRVHcTCAS5lB5ZR5KUApOT3cZsVhs984Mmsz+/ V4Z6OZsDrFjz+MRDH1hiEauKdGXjagzEXCWcgckQrokmREpHGU7Y6/Z2qKMRYnBqpqtE iEY5t/mq3PAmOu1pAJ8pySebW15PR/thBHPuWzHkZqim021luT+y9tkl8tBRN4AkugJS Vpqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0xLmuarIgQdWn84D3wx5rQsfGRtDVE6UQliEht6Oq48=; b=jL2Tl0nsLycyoqSAc+e2QFmgIG1wapKqyEGm2Cf3CqHvgPZE+FT5qXRJh19cWRuUly noyktAZQ0EMNMXKbN4hlguyQ5i6PFXFY7v0uwNOwqxVzuQsepUsH8YpZktsxvEucT6vE InAhtg6iwHY3lG2AC7QVAwXV+q3J1QxYIeP0o4fNWjQcxH0jTEN516QnJ994pM+drtXz Z7Z6xp1zA1+nLqRMPBc6pM+ZW3ODEozln0bTGD25h4BQJRVyBISxKGCYk53wGyEznQyZ kGkeydG7W2QuIauoMam6B5uSmJloD5Q9QH6r315MZ8j7YvM6JqosOheeLu4U8bA+HS0F OqKw== X-Gm-Message-State: AOAM5336M8Bz4HemJmEJgJt+hjZKRAWxiofaS4TJgBJ8YPdXiOWn1c3Q eNuq+PQ9WaFch0BeWd1E6TA1SrwvsTk6zg== X-Google-Smtp-Source: ABdhPJwBW139zzmCSB7i8s5twWc31e2pZPSPq4BBWMA49N6/L9k08yfNKeLBW6qnhsn2aMKeT1auFA== X-Received: by 2002:a17:902:b189:b029:dc:4102:4edf with SMTP id s9-20020a170902b189b02900dc41024edfmr8031040plr.80.1610188399222; Sat, 09 Jan 2021 02:33:19 -0800 (PST) Received: from localhost.localdomain (61-230-13-78.dynamic-ip.hinet.net. [61.230.13.78]) by smtp.gmail.com with ESMTPSA id w200sm11691572pfc.14.2021.01.09.02.33.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 09 Jan 2021 02:33:18 -0800 (PST) From: Lecopzer Chen To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org Cc: dan.j.williams@intel.com, aryabinin@virtuozzo.com, glider@google.com, dvyukov@google.com, akpm@linux-foundation.org, linux-mediatek@lists.infradead.org, yj.chiang@mediatek.com, will@kernel.org, catalin.marinas@arm.com, ardb@kernel.org, andreyknvl@google.com, broonie@kernel.org, linux@roeck-us.net, rppt@kernel.org, tyhicks@linux.microsoft.com, robin.murphy@arm.com, vincenzo.frascino@arm.com, gustavoars@kernel.org, Lecopzer Chen , Lecopzer Chen Subject: [PATCH v2 1/4] arm64: kasan: don't populate vmalloc area for CONFIG_KASAN_VMALLOC Date: Sat, 9 Jan 2021 18:32:49 +0800 Message-Id: <20210109103252.812517-2-lecopzer@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210109103252.812517-1-lecopzer@gmail.com> References: <20210109103252.812517-1-lecopzer@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linux support KAsan for VMALLOC since commit 3c5c3cfb9ef4da9 ("kasan: support backing vmalloc space with real shadow memory") Like how the MODULES_VADDR does now, just not to early populate the VMALLOC_START between VMALLOC_END. similarly, the kernel code mapping is now in the VMALLOC area and should keep these area populated. Signed-off-by: Lecopzer Chen --- arch/arm64/mm/kasan_init.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c index d8e66c78440e..39b218a64279 100644 --- a/arch/arm64/mm/kasan_init.c +++ b/arch/arm64/mm/kasan_init.c @@ -214,6 +214,7 @@ static void __init kasan_init_shadow(void) { u64 kimg_shadow_start, kimg_shadow_end; u64 mod_shadow_start, mod_shadow_end; + u64 vmalloc_shadow_start, vmalloc_shadow_end; phys_addr_t pa_start, pa_end; u64 i; @@ -223,6 +224,9 @@ static void __init kasan_init_shadow(void) mod_shadow_start = (u64)kasan_mem_to_shadow((void *)MODULES_VADDR); mod_shadow_end = (u64)kasan_mem_to_shadow((void *)MODULES_END); + vmalloc_shadow_start = (u64)kasan_mem_to_shadow((void *)VMALLOC_START); + vmalloc_shadow_end = (u64)kasan_mem_to_shadow((void *)VMALLOC_END); + /* * We are going to perform proper setup of shadow memory. * At first we should unmap early shadow (clear_pgds() call below). @@ -241,12 +245,21 @@ static void __init kasan_init_shadow(void) kasan_populate_early_shadow(kasan_mem_to_shadow((void *)PAGE_END), (void *)mod_shadow_start); - kasan_populate_early_shadow((void *)kimg_shadow_end, - (void *)KASAN_SHADOW_END); + if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) { + kasan_populate_early_shadow((void *)vmalloc_shadow_end, + (void *)KASAN_SHADOW_END); + if (vmalloc_shadow_start > mod_shadow_end) + kasan_populate_early_shadow((void *)mod_shadow_end, + (void *)vmalloc_shadow_start); + + } else { + kasan_populate_early_shadow((void *)kimg_shadow_end, + (void *)KASAN_SHADOW_END); + if (kimg_shadow_start > mod_shadow_end) + kasan_populate_early_shadow((void *)mod_shadow_end, + (void *)kimg_shadow_start); + } - if (kimg_shadow_start > mod_shadow_end) - kasan_populate_early_shadow((void *)mod_shadow_end, - (void *)kimg_shadow_start); for_each_mem_range(i, &pa_start, &pa_end) { void *start = (void *)__phys_to_virt(pa_start); -- 2.25.1 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=-13.7 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 B6A05C433DB for ; Sat, 9 Jan 2021 10:34:28 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5FE0C238EC for ; Sat, 9 Jan 2021 10:34:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5FE0C238EC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=OiGMyfzcbWKzA5YjEiXSYzyVChQ6oqocHVnY7d5e3kA=; b=Qr9bbi74Ckt7oJydO5CgYSxWY QDBdncJfXhtF/Gl/YzU12sLR/Oac5wJU/KwFcFER0kOvbt7rRvyfb5joyfT9YkRNuem17Wc7hTPYz H1pzOpPQga3De6GuYyi3E+hT4huThfvp1jRN9r+VjbFBgS/kJnd3ojZGhAJuMXE+kSFZpYW73rvmY pob7Y1oGKmCi4IQ4P57iFrFV4UBmQk+HVhS80xE7GAi5Mv1+e8l/GKtihiWoZeLaommum5a2l7WKJ VjyC+D9ILRhsSXWeTALg+VP4TxFsYAswHDwir2rjejTcP+Ltomat20BE+9FtHrkWBQv1Pf8vcNuWA Usq79AcjA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kyBZQ-0007yV-4j; Sat, 09 Jan 2021 10:34:08 +0000 Received: from mail-pj1-x102e.google.com ([2607:f8b0:4864:20::102e]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kyBYf-0007jE-Hz; Sat, 09 Jan 2021 10:33:23 +0000 Received: by mail-pj1-x102e.google.com with SMTP id f14so5028064pju.4; Sat, 09 Jan 2021 02:33:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0xLmuarIgQdWn84D3wx5rQsfGRtDVE6UQliEht6Oq48=; b=tznSyNRiMyzItLUMQF6oR/88pqEwX9kk7kTQfKdCANR4RIg/jSGWow+vKdXCem/hFb 3hSA000zXc3fyKUBdl/ZjSgR2sEYKmFdqPf4S63Pq3QJjj+bNy413T645P3RQ23jgmVt 3J3FN8KfuLI2UcJsPN3IuNUC+xuBK2yRVHcTCAS5lB5ZR5KUApOT3cZsVhs984Mmsz+/ V4Z6OZsDrFjz+MRDH1hiEauKdGXjagzEXCWcgckQrokmREpHGU7Y6/Z2qKMRYnBqpqtE iEY5t/mq3PAmOu1pAJ8pySebW15PR/thBHPuWzHkZqim021luT+y9tkl8tBRN4AkugJS Vpqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0xLmuarIgQdWn84D3wx5rQsfGRtDVE6UQliEht6Oq48=; b=QaS4YI9ecqFL5HAz/jeu/ZZZadoP66GeQvC2+vVtKwibUj9v/cMBlGLftrmcGuyYUt k1Zpd8RiMh6YKxcYE6sLpNPE8t6LLgQ2yx3hG4qI28BhSJbapMZrmeRQQxC0UQFTNg4v OJf7hdv6hVxN5agoUWyRsGTtkC2xdaNUYpnsDYTwHhTs/MNpUUNQvLhYsTXov+mA0gNT DfcqMGOSuSj/uL9mx4YDDtI/X6ZI+6EDamyYMA+QHZ1wtQJ0DoEg8NkhzbH9VfAR0k7o XgytdF5bBBY1VZ2M42udTqEURJSBqbRM5mKWUgN0neaqf7qI2juHVLYsROJ0jMklPWnx SIfA== X-Gm-Message-State: AOAM530p0+JqPrY2XXpSW9sO5TUOTpP80l4R02A+P5GpDEQww7AP0qE5 o2YdWR6plqBjFFivPrYjgkk= X-Google-Smtp-Source: ABdhPJwBW139zzmCSB7i8s5twWc31e2pZPSPq4BBWMA49N6/L9k08yfNKeLBW6qnhsn2aMKeT1auFA== X-Received: by 2002:a17:902:b189:b029:dc:4102:4edf with SMTP id s9-20020a170902b189b02900dc41024edfmr8031040plr.80.1610188399222; Sat, 09 Jan 2021 02:33:19 -0800 (PST) Received: from localhost.localdomain (61-230-13-78.dynamic-ip.hinet.net. [61.230.13.78]) by smtp.gmail.com with ESMTPSA id w200sm11691572pfc.14.2021.01.09.02.33.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 09 Jan 2021 02:33:18 -0800 (PST) From: Lecopzer Chen To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 1/4] arm64: kasan: don't populate vmalloc area for CONFIG_KASAN_VMALLOC Date: Sat, 9 Jan 2021 18:32:49 +0800 Message-Id: <20210109103252.812517-2-lecopzer@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210109103252.812517-1-lecopzer@gmail.com> References: <20210109103252.812517-1-lecopzer@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210109_053321_803423_F1CAE136 X-CRM114-Status: GOOD ( 13.49 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tyhicks@linux.microsoft.com, gustavoars@kernel.org, Lecopzer Chen , glider@google.com, yj.chiang@mediatek.com, robin.murphy@arm.com, andreyknvl@google.com, ardb@kernel.org, Lecopzer Chen , broonie@kernel.org, linux-mediatek@lists.infradead.org, linux@roeck-us.net, rppt@kernel.org, catalin.marinas@arm.com, aryabinin@virtuozzo.com, dan.j.williams@intel.com, vincenzo.frascino@arm.com, will@kernel.org, akpm@linux-foundation.org, dvyukov@google.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Linux support KAsan for VMALLOC since commit 3c5c3cfb9ef4da9 ("kasan: support backing vmalloc space with real shadow memory") Like how the MODULES_VADDR does now, just not to early populate the VMALLOC_START between VMALLOC_END. similarly, the kernel code mapping is now in the VMALLOC area and should keep these area populated. Signed-off-by: Lecopzer Chen --- arch/arm64/mm/kasan_init.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c index d8e66c78440e..39b218a64279 100644 --- a/arch/arm64/mm/kasan_init.c +++ b/arch/arm64/mm/kasan_init.c @@ -214,6 +214,7 @@ static void __init kasan_init_shadow(void) { u64 kimg_shadow_start, kimg_shadow_end; u64 mod_shadow_start, mod_shadow_end; + u64 vmalloc_shadow_start, vmalloc_shadow_end; phys_addr_t pa_start, pa_end; u64 i; @@ -223,6 +224,9 @@ static void __init kasan_init_shadow(void) mod_shadow_start = (u64)kasan_mem_to_shadow((void *)MODULES_VADDR); mod_shadow_end = (u64)kasan_mem_to_shadow((void *)MODULES_END); + vmalloc_shadow_start = (u64)kasan_mem_to_shadow((void *)VMALLOC_START); + vmalloc_shadow_end = (u64)kasan_mem_to_shadow((void *)VMALLOC_END); + /* * We are going to perform proper setup of shadow memory. * At first we should unmap early shadow (clear_pgds() call below). @@ -241,12 +245,21 @@ static void __init kasan_init_shadow(void) kasan_populate_early_shadow(kasan_mem_to_shadow((void *)PAGE_END), (void *)mod_shadow_start); - kasan_populate_early_shadow((void *)kimg_shadow_end, - (void *)KASAN_SHADOW_END); + if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) { + kasan_populate_early_shadow((void *)vmalloc_shadow_end, + (void *)KASAN_SHADOW_END); + if (vmalloc_shadow_start > mod_shadow_end) + kasan_populate_early_shadow((void *)mod_shadow_end, + (void *)vmalloc_shadow_start); + + } else { + kasan_populate_early_shadow((void *)kimg_shadow_end, + (void *)KASAN_SHADOW_END); + if (kimg_shadow_start > mod_shadow_end) + kasan_populate_early_shadow((void *)mod_shadow_end, + (void *)kimg_shadow_start); + } - if (kimg_shadow_start > mod_shadow_end) - kasan_populate_early_shadow((void *)mod_shadow_end, - (void *)kimg_shadow_start); for_each_mem_range(i, &pa_start, &pa_end) { void *start = (void *)__phys_to_virt(pa_start); -- 2.25.1 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek 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=-13.7 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 9FD9EC433DB for ; Sat, 9 Jan 2021 10:36:13 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5D7DE23A01 for ; Sat, 9 Jan 2021 10:36:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5D7DE23A01 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ziHGRhFB62Co8mJZ3cLFqx2yvmsn+jRVWMxDw499CxA=; b=U4un3rgStrNRi7sLe3/yYacee LGZcMeJDV/ET+cZQ0XuSL3E879hvMcHo7ls5PPj0KoL2iYvSskQ3IhjXodW+MV88FGrGk3qJxjocc iqzjDAbFYX6CMj9ptJxe66pxV5m7Hjsd0h077ED1Lw9Ck3+LyW5iW7yMXKW1cEjsCQRcYD8pHP14f 4k+ze0IgpgzxY4cYxzDNxjI0b83HqpI5hJ33L3AYUPgztJdt9PyADgxuzgBn3fV7ipFQZWqNkumyr rSuvYWvjrzc+F9/zhK66BkkvDVzUc1S7ftbRRMhz3q1lGRknyXcnYtRknesUuxoxG4E2815rYBTy3 jUmV3zwZQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kyBZM-0007xu-SA; Sat, 09 Jan 2021 10:34:04 +0000 Received: from mail-pj1-x102e.google.com ([2607:f8b0:4864:20::102e]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kyBYf-0007jE-Hz; Sat, 09 Jan 2021 10:33:23 +0000 Received: by mail-pj1-x102e.google.com with SMTP id f14so5028064pju.4; Sat, 09 Jan 2021 02:33:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0xLmuarIgQdWn84D3wx5rQsfGRtDVE6UQliEht6Oq48=; b=tznSyNRiMyzItLUMQF6oR/88pqEwX9kk7kTQfKdCANR4RIg/jSGWow+vKdXCem/hFb 3hSA000zXc3fyKUBdl/ZjSgR2sEYKmFdqPf4S63Pq3QJjj+bNy413T645P3RQ23jgmVt 3J3FN8KfuLI2UcJsPN3IuNUC+xuBK2yRVHcTCAS5lB5ZR5KUApOT3cZsVhs984Mmsz+/ V4Z6OZsDrFjz+MRDH1hiEauKdGXjagzEXCWcgckQrokmREpHGU7Y6/Z2qKMRYnBqpqtE iEY5t/mq3PAmOu1pAJ8pySebW15PR/thBHPuWzHkZqim021luT+y9tkl8tBRN4AkugJS Vpqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0xLmuarIgQdWn84D3wx5rQsfGRtDVE6UQliEht6Oq48=; b=QaS4YI9ecqFL5HAz/jeu/ZZZadoP66GeQvC2+vVtKwibUj9v/cMBlGLftrmcGuyYUt k1Zpd8RiMh6YKxcYE6sLpNPE8t6LLgQ2yx3hG4qI28BhSJbapMZrmeRQQxC0UQFTNg4v OJf7hdv6hVxN5agoUWyRsGTtkC2xdaNUYpnsDYTwHhTs/MNpUUNQvLhYsTXov+mA0gNT DfcqMGOSuSj/uL9mx4YDDtI/X6ZI+6EDamyYMA+QHZ1wtQJ0DoEg8NkhzbH9VfAR0k7o XgytdF5bBBY1VZ2M42udTqEURJSBqbRM5mKWUgN0neaqf7qI2juHVLYsROJ0jMklPWnx SIfA== X-Gm-Message-State: AOAM530p0+JqPrY2XXpSW9sO5TUOTpP80l4R02A+P5GpDEQww7AP0qE5 o2YdWR6plqBjFFivPrYjgkk= X-Google-Smtp-Source: ABdhPJwBW139zzmCSB7i8s5twWc31e2pZPSPq4BBWMA49N6/L9k08yfNKeLBW6qnhsn2aMKeT1auFA== X-Received: by 2002:a17:902:b189:b029:dc:4102:4edf with SMTP id s9-20020a170902b189b02900dc41024edfmr8031040plr.80.1610188399222; Sat, 09 Jan 2021 02:33:19 -0800 (PST) Received: from localhost.localdomain (61-230-13-78.dynamic-ip.hinet.net. [61.230.13.78]) by smtp.gmail.com with ESMTPSA id w200sm11691572pfc.14.2021.01.09.02.33.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 09 Jan 2021 02:33:18 -0800 (PST) From: Lecopzer Chen To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 1/4] arm64: kasan: don't populate vmalloc area for CONFIG_KASAN_VMALLOC Date: Sat, 9 Jan 2021 18:32:49 +0800 Message-Id: <20210109103252.812517-2-lecopzer@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210109103252.812517-1-lecopzer@gmail.com> References: <20210109103252.812517-1-lecopzer@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210109_053321_803423_F1CAE136 X-CRM114-Status: GOOD ( 13.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tyhicks@linux.microsoft.com, gustavoars@kernel.org, Lecopzer Chen , glider@google.com, yj.chiang@mediatek.com, robin.murphy@arm.com, andreyknvl@google.com, ardb@kernel.org, Lecopzer Chen , broonie@kernel.org, linux-mediatek@lists.infradead.org, linux@roeck-us.net, rppt@kernel.org, catalin.marinas@arm.com, aryabinin@virtuozzo.com, dan.j.williams@intel.com, vincenzo.frascino@arm.com, will@kernel.org, akpm@linux-foundation.org, dvyukov@google.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Linux support KAsan for VMALLOC since commit 3c5c3cfb9ef4da9 ("kasan: support backing vmalloc space with real shadow memory") Like how the MODULES_VADDR does now, just not to early populate the VMALLOC_START between VMALLOC_END. similarly, the kernel code mapping is now in the VMALLOC area and should keep these area populated. Signed-off-by: Lecopzer Chen --- arch/arm64/mm/kasan_init.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c index d8e66c78440e..39b218a64279 100644 --- a/arch/arm64/mm/kasan_init.c +++ b/arch/arm64/mm/kasan_init.c @@ -214,6 +214,7 @@ static void __init kasan_init_shadow(void) { u64 kimg_shadow_start, kimg_shadow_end; u64 mod_shadow_start, mod_shadow_end; + u64 vmalloc_shadow_start, vmalloc_shadow_end; phys_addr_t pa_start, pa_end; u64 i; @@ -223,6 +224,9 @@ static void __init kasan_init_shadow(void) mod_shadow_start = (u64)kasan_mem_to_shadow((void *)MODULES_VADDR); mod_shadow_end = (u64)kasan_mem_to_shadow((void *)MODULES_END); + vmalloc_shadow_start = (u64)kasan_mem_to_shadow((void *)VMALLOC_START); + vmalloc_shadow_end = (u64)kasan_mem_to_shadow((void *)VMALLOC_END); + /* * We are going to perform proper setup of shadow memory. * At first we should unmap early shadow (clear_pgds() call below). @@ -241,12 +245,21 @@ static void __init kasan_init_shadow(void) kasan_populate_early_shadow(kasan_mem_to_shadow((void *)PAGE_END), (void *)mod_shadow_start); - kasan_populate_early_shadow((void *)kimg_shadow_end, - (void *)KASAN_SHADOW_END); + if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) { + kasan_populate_early_shadow((void *)vmalloc_shadow_end, + (void *)KASAN_SHADOW_END); + if (vmalloc_shadow_start > mod_shadow_end) + kasan_populate_early_shadow((void *)mod_shadow_end, + (void *)vmalloc_shadow_start); + + } else { + kasan_populate_early_shadow((void *)kimg_shadow_end, + (void *)KASAN_SHADOW_END); + if (kimg_shadow_start > mod_shadow_end) + kasan_populate_early_shadow((void *)mod_shadow_end, + (void *)kimg_shadow_start); + } - if (kimg_shadow_start > mod_shadow_end) - kasan_populate_early_shadow((void *)mod_shadow_end, - (void *)kimg_shadow_start); for_each_mem_range(i, &pa_start, &pa_end) { void *start = (void *)__phys_to_virt(pa_start); -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel