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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 6F25FEFD202 for ; Wed, 25 Feb 2026 08:16:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=qbXEkZK+UBZ3F7j2MH1sXu6emUlCr8xCSA0nHJ3EKL0=; b=GbyZrG/CA+0QHVcIx81NpHyGDf TXJ1B7oe5eHw3HFuHl9k6xr1jo5ddPCiTtkJ+eYojVByYtZYWvjkOShmxzZ7AzksDVQvRr81yrfak JWwRmk3ZKPt4kFy2yuCqEtuWvY9zp1uMpJNecjtYT6tmdi36LjRMnVZ3czWcWtjxcOA9+cLrpj0j4 w3ZaunTpgCToLtxUeyNvR43uHEKJsaFeVEsQ7iuldP4Ppuyo1kpXFLXNdAxRQjVp6nMaaT23jCHCl GstBrh5j8d5LCBrCq5DvNyzPFwcPXn8kaR7E3cktDOl/RmTWjnc8KsvBS6YB/J2JXgptGa3af4i/P GW1U6uMw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvA3q-00000003V50-1beb; Wed, 25 Feb 2026 08:15:58 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvA3n-00000003V0R-2rAM for linux-arm-kernel@lists.infradead.org; Wed, 25 Feb 2026 08:15:57 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007354; 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=qbXEkZK+UBZ3F7j2MH1sXu6emUlCr8xCSA0nHJ3EKL0=; b=V05vutQRqBf9h7tY4tzubeoZFRBlno0ELN3CUrsLkAINB3FbYIYR/Z3IQ3Ent1pVKAsYiT 4Y6gh+rrjqRGKL9p0Gm2bjdWZl2bA2aEPRAES0rzay52YvHPNRrvmwIAd2q4bhgGsroE2v M78GaeMlbG4j4ZtQAHvgyPpWWxa0Mjs= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-304-4chxBKYfMym28iynbNI3jg-1; Wed, 25 Feb 2026 03:15:50 -0500 X-MC-Unique: 4chxBKYfMym28iynbNI3jg-1 X-Mimecast-MFC-AGG-ID: 4chxBKYfMym28iynbNI3jg_1772007348 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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 0CB5F195609F; Wed, 25 Feb 2026 08:15:48 +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 C1E3A1800286; Wed, 25 Feb 2026 08:15:38 +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 07/15] arch/arm64: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:04 +0800 Message-ID: <20260225081412.76502-8-bhe@redhat.com> In-Reply-To: <20260225081412.76502-1-bhe@redhat.com> References: <20260225081412.76502-1-bhe@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mimecast-MFC-PROC-ID: 0ND6_zqcpANHPm1y1xvUVUVs1r1kc4pINipunpVbW1k_1772007348 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260225_001555_863167_1588BF73 X-CRM114-Status: UNSURE ( 9.11 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Here, kasan is disabled if specified 'kasan=off' in kernel cmdline. And also need skip kasan_populate_early_vm_area_shadow() if kasan is disabled. Signed-off-by: Baoquan He Cc: linux-arm-kernel@lists.infradead.org --- arch/arm64/mm/kasan_init.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c index abeb81bf6ebd..4a58e609c81b 100644 --- a/arch/arm64/mm/kasan_init.c +++ b/arch/arm64/mm/kasan_init.c @@ -384,6 +384,9 @@ void __init kasan_populate_early_vm_area_shadow(void *start, unsigned long size) { unsigned long shadow_start, shadow_end; + if (!kasan_enabled()) + return; + if (!is_vmalloc_or_module_addr(start)) return; @@ -397,6 +400,10 @@ void __init kasan_populate_early_vm_area_shadow(void *start, unsigned long size) void __init kasan_init(void) { + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; + kasan_init_shadow(); kasan_init_depth(); kasan_init_generic(); -- 2.52.0