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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 39374EFD20A for ; Wed, 25 Feb 2026 08:17:20 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4fLS9t4dqfz3dX7; Wed, 25 Feb 2026 19:17:06 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1772007426; cv=none; b=Xb/ZmfRXqAU/fechzdtqhZAhG5jjL4cp80ZMbgXARKoEOtfvLg1EO/tbpsErhnczttOC1K5yR/5xi3JmEHY8l5Knzx2lLVellRs/U5vIMeWtwB33rzlrFacHnRtcd5QbTVeaU+rMAdV+IfRC6/fFJsiCai4OxMHOutP7fAdM5XWwFUkUbPluhp9+MGGaILWY9idpg3JH28TzQBB9/2rNJlHBxKVi4PEdgjgkZuygudbwQaObfZ0pLQulCP7vVbQcNuZPaAOh6+hwjl1Wyfs7AWhw05+F81aDIDPioef/0Zg8IMlrr2Po3ur3LpIw1LT7yjNJ7l4D/DhB1ZrD2UhINg== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1772007426; c=relaxed/relaxed; bh=yJ/15auNTcs4bEnKE4TKOadihs1pA/T7OdgqiTtaDyY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=YTBtqA9C4kbpNpuSo803Jha76ZLa/Snu90iq6t+fv2W3AANHqlbJlBPukrERSGyj3cf0RgUQfrdj+zdqrLa5PAXQSKPsDVtTwFn5f+nDbgZekqJCe2T/V3pQ1DhHnv55RQx6kzOQUk9Pgiw+nd8DKhFrFvkYFKZNRN/VeqvNuVNWnKBsBHY/QDzDjzrgTzkRy9JHwszVswbcDUU/NfZh87CXzlQMH3wja6/2LY7OvI3AuM2Mr8zalgy+C9o7v0XsCA98T83BSATlw2XIEElkFovtg+01RTp1ncwfOXxgT+x++MapYvVsYJBUKCQI0dtWjziJqcvbVJlu7tkQ/HfsNQ== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=Q9qhd6Bo; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=iOoen/vw; dkim-atps=neutral; spf=pass (client-ip=170.10.133.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=bhe@redhat.com; receiver=lists.ozlabs.org) smtp.mailfrom=redhat.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=Q9qhd6Bo; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=iOoen/vw; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=redhat.com (client-ip=170.10.133.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=bhe@redhat.com; receiver=lists.ozlabs.org) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4fLS9s4c3Jz3f1r for ; Wed, 25 Feb 2026 19:17:05 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007422; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yJ/15auNTcs4bEnKE4TKOadihs1pA/T7OdgqiTtaDyY=; b=Q9qhd6BoKk25/pDR1ffVxRvMTUCEb8owcd4l0GY9vah8KPb2RrvtxOESICBzhS4v1fEIqt Df0AgoQbW/6+gzmXrfCDUJc6BPww9nwyf7EOcSRHikAMePojL4qoPTfxoxKePrZ7IOl5h3 LY1ZkZHyuRSMNyM3W87CfKTAqzE86Rg= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007423; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yJ/15auNTcs4bEnKE4TKOadihs1pA/T7OdgqiTtaDyY=; b=iOoen/vwp+ia4RQ72J6I7gaFI4EShd9ePvCzaKGHTSVpqzNdGLVHhAAhLJCl00i5F9AbrG rw4BnKlleM7aZulu+M/tTmKzHCO4GmRciVfRcCK9f66AHaI4UFT2VlGlhkmXSTUIe7Jx3K UfAoilVrtiYzzmJXmRzPGgAh1baT/Io= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-110-MO7Loi8qMuGy7jOa06YqRg-1; Wed, 25 Feb 2026 03:15:25 -0500 X-MC-Unique: MO7Loi8qMuGy7jOa06YqRg-1 X-Mimecast-MFC-AGG-ID: MO7Loi8qMuGy7jOa06YqRg_1772007319 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 320AA1800349; Wed, 25 Feb 2026 08:15:19 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.55]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id BFB231800465; Wed, 25 Feb 2026 08:15:08 +0000 (UTC) From: Baoquan He To: kasan-dev@googlegroups.com Cc: linux-mm@kvack.org, andreyknvl@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, dvyukov@google.com, linux-kernel@vger.kernel.org, linux-um@lists.infradead.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, x86@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com, linux-s390@vger.kernel.org, hca@linux.ibm.com, Baoquan He Subject: [PATCH v5 04/15] mm/kasan: make kasan=on|off take effect for all three modes Date: Wed, 25 Feb 2026 16:14:01 +0800 Message-ID: <20260225081412.76502-5-bhe@redhat.com> In-Reply-To: <20260225081412.76502-1-bhe@redhat.com> References: <20260225081412.76502-1-bhe@redhat.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mimecast-MFC-PROC-ID: bcaggeRTtf809QkySRqAw7JQvAx7dUEKHMIojEzHdlM_1772007319 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit Now everything is ready, setting kasan=off can disable kasan for all three modes. Signed-off-by: Baoquan He --- include/linux/kasan-enabled.h | 12 +++++------- mm/kasan/common.c | 4 ---- 2 files changed, 5 insertions(+), 11 deletions(-) diff --git a/include/linux/kasan-enabled.h b/include/linux/kasan-enabled.h index b7cb906825ca..cec21a08446e 100644 --- a/include/linux/kasan-enabled.h +++ b/include/linux/kasan-enabled.h @@ -4,10 +4,11 @@ #include -#if defined(CONFIG_ARCH_DEFER_KASAN) || defined(CONFIG_KASAN_HW_TAGS) +#ifdef CONFIG_KASAN +extern bool kasan_arg_disabled; + /* * Global runtime flag for KASAN modes that need runtime control. - * Used by ARCH_DEFER_KASAN architectures and HW_TAGS mode. */ DECLARE_STATIC_KEY_FALSE(kasan_flag_enabled); @@ -25,18 +26,15 @@ static inline void kasan_enable(void) static_branch_enable(&kasan_flag_enabled); } #else -/* For architectures that can enable KASAN early, use compile-time check. */ static __always_inline bool kasan_enabled(void) { - return IS_ENABLED(CONFIG_KASAN); + return false; } static inline void kasan_enable(void) {} -#endif /* CONFIG_ARCH_DEFER_KASAN || CONFIG_KASAN_HW_TAGS */ +#endif #ifdef CONFIG_KASAN_HW_TAGS -extern bool kasan_arg_disabled; - static inline bool kasan_hw_tags_enabled(void) { return kasan_enabled(); diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 0d788a468e96..fc6513fa5795 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -33,16 +33,13 @@ #include "kasan.h" #include "../slab.h" -#if defined(CONFIG_ARCH_DEFER_KASAN) || defined(CONFIG_KASAN_HW_TAGS) /* * Definition of the unified static key declared in kasan-enabled.h. * This provides consistent runtime enable/disable across KASAN modes. */ DEFINE_STATIC_KEY_FALSE(kasan_flag_enabled); EXPORT_SYMBOL_GPL(kasan_flag_enabled); -#endif -#ifdef CONFIG_KASAN_HW_TAGS bool kasan_arg_disabled __ro_after_init; /* kasan=off/on */ @@ -61,7 +58,6 @@ static int __init early_kasan_flag(char *arg) return 0; } early_param("kasan", early_kasan_flag); -#endif struct slab *kasan_addr_to_slab(const void *addr) { -- 2.52.0