From nobody Tue Apr 7 07:08:24 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 73A9B30F532 for ; Wed, 25 Feb 2026 08:15:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007323; cv=none; b=iPu/8Uw0KPULP+b15OSLodaTGENy/5DNiGyBKxEOXz/C3E8wlslE1PotLqRJoadrMuHE8dY/vfy6ELJJuDq1ZM4PKKETbwlgHOhLX5Uc7PpRrz6QSq39CnKp6hy7yXDCOp/ZhVaZjDes6JrXzgbmFYKI2uWWZF+LdCGytKuxF/g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007323; c=relaxed/simple; bh=6y9yGb1KomQEBH/3B4vy/U8GsLaTCLQkmSCA7l0nNBI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=Zqx6t0lKEyN6QQ1ryHMGL7ADRFbPrzQWGqr9BEHmdUy09eWcud/zgztfqPJTV7GUKcImvRGYSiD0bVNubRFjmgU07f3SDGfoy69uW7DMVqix5j5ZBVybf+U8vYzvuzjrZUKfcB+HeEwEWjuOPMbq8e/4LDzhHhHcQ2Nf05tlTHs= 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=L8lH5NRm; arc=none smtp.client-ip=170.10.129.124 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="L8lH5NRm" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007321; 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=krRB48lflglDsnK+MbRSOk31duSyM0PDe9SlLiivSrU=; b=L8lH5NRm1MJEeFnOge0c5hiH6crUmPFwlYZsZuD3ASdI1aJV4cXA2z7YzgRfdmuOVY98J3 0OnP88tAQj9WMeOeHy2BhHg7gxlvvETuJl6K21P897vaYS/pK1Qc5gTfbov6Q53HutNV/x 9eOGRAhzDb3ejKNEkUXPAUPpwityekY= Received: from mx-prod-mc-08.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-297-WO8-mb7BPemrfREQOcvRnw-1; Wed, 25 Feb 2026 03:15:11 -0500 X-MC-Unique: WO8-mb7BPemrfREQOcvRnw-1 X-Mimecast-MFC-AGG-ID: WO8-mb7BPemrfREQOcvRnw_1772007308 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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 14EC918004AD; Wed, 25 Feb 2026 08:15:08 +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 860561800465; Wed, 25 Feb 2026 08:14:58 +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 03/15] mm/kasan: mm/kasan: move kasan= code to common place Date: Wed, 25 Feb 2026 16:14:00 +0800 Message-ID: <20260225081412.76502-4-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" This allows generic and sw_tags to be set in kernel cmdline too. Signed-off-by: Baoquan He --- include/linux/kasan-enabled.h | 2 ++ mm/kasan/common.c | 21 +++++++++++++++++++++ mm/kasan/hw_tags.c | 18 ------------------ 3 files changed, 23 insertions(+), 18 deletions(-) diff --git a/include/linux/kasan-enabled.h b/include/linux/kasan-enabled.h index 9eca967d8526..b7cb906825ca 100644 --- a/include/linux/kasan-enabled.h +++ b/include/linux/kasan-enabled.h @@ -35,6 +35,8 @@ static inline void kasan_enable(void) {} #endif /* CONFIG_ARCH_DEFER_KASAN || CONFIG_KASAN_HW_TAGS */ =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 b7d05c2a6d93..0d788a468e96 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -42,6 +42,27 @@ 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; + +/* kasan=3Doff/on */ +static int __init early_kasan_flag(char *arg) +{ + if (!arg) + return -EINVAL; + + if (!strcmp(arg, "off")) + kasan_arg_disabled =3D true; + else if (!strcmp(arg, "on")) + kasan_arg_disabled =3D false; + else + return -EINVAL; + + return 0; +} +early_param("kasan", early_kasan_flag); +#endif + struct slab *kasan_addr_to_slab(const void *addr) { if (virt_addr_valid(addr)) diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index 26a69f0d822c..9602ea4861e2 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -35,7 +35,6 @@ enum kasan_arg_vmalloc { KASAN_ARG_VMALLOC_ON, }; =20 -bool kasan_arg_disabled __ro_after_init; static enum kasan_arg_mode kasan_arg_mode __ro_after_init; static enum kasan_arg_vmalloc kasan_arg_vmalloc __initdata; =20 @@ -75,23 +74,6 @@ unsigned int kasan_page_alloc_sample_order =3D PAGE_ALLO= C_SAMPLE_ORDER_DEFAULT; =20 DEFINE_PER_CPU(long, kasan_page_alloc_skip); =20 -/* kasan=3Doff/on */ -static int __init early_kasan_flag(char *arg) -{ - if (!arg) - return -EINVAL; - - if (!strcmp(arg, "off")) - kasan_arg_disabled =3D true; - else if (!strcmp(arg, "on")) - kasan_arg_disabled =3D false; - else - return -EINVAL; - - return 0; -} -early_param("kasan", early_kasan_flag); - /* kasan.mode=3Dsync/async/asymm */ static int __init early_kasan_mode(char *arg) { --=20 2.52.0