From nobody Tue Apr 7 07:05:54 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 421353101D0 for ; Wed, 25 Feb 2026 08:15:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007332; cv=none; b=uWZRbLpU5Vcw3Z/cefaI4GVN5YFKKpHniLH7TigNkxGO4BzTIIEFgH6FehVt0HzKBs8xfFxb6LvJtyQUu9/Trl78kv366xzs1cggbnhwN36dDPcMqGFKYVKNecoRJOsrp8xOipRvKv+6meKaHjc63M+haCFDzfAa68cYdZQJH2s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007332; c=relaxed/simple; bh=LanImvKLX9Jg/kKmnRDnHcw1cAnp8QGv+qKVqiPRSHM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=eEud4nBmS0vyQin4dRCfKvpXPbKr7rlwDkZOz+sE40JXbSOe+0tVYSJ8PBqsynOyQHq5lkV+hTeQIFKb424WBS6CWFyc7Xfdei3hTWbbXK8qJr0lZPFNKwigx1y35U/5DEPGl6dlZnf3NB0IeE0aXanpY+5+Xo/Q5trFslul1mc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=dvr8nlRM; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="dvr8nlRM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007330; 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=dvr8nlRMNGMQ/0IiTExCFwwlS4EIBQTQ4JlMMPpybuAGXpVJmkhvQmWqtCjmCTFtV+gMtD cNcZGUcOJlpNCbVrGDXL3J3pXLVVZ8Ri6MHwa8PwGRpASUYJtSWyonidVdQOxHZmLLDo+7 WhX1AjnIXcOyDt7jnjo9UKM/HvtBHNs= 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Content-Type: text/plain; charset="utf-8" Now everything is ready, setting kasan=3Doff 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 @@ =20 #include =20 -#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); =20 @@ -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; } =20 static inline void kasan_enable(void) {} -#endif /* CONFIG_ARCH_DEFER_KASAN || CONFIG_KASAN_HW_TAGS */ +#endif =20 #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" =20 -#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 =20 -#ifdef CONFIG_KASAN_HW_TAGS bool kasan_arg_disabled __ro_after_init; =20 /* kasan=3Doff/on */ @@ -61,7 +58,6 @@ static int __init early_kasan_flag(char *arg) return 0; } early_param("kasan", early_kasan_flag); -#endif =20 struct slab *kasan_addr_to_slab(const void *addr) { --=20 2.52.0