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 08B3DCA0EDC for ; Tue, 12 Aug 2025 16:23:16 +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=rmch9LxILHmDSZgEKLxWACfFjV5jmswbcfLkcrWwQo8=; b=VuqQ+pgHlLmfyZ0Jio+l8blekD BI4WShrSZguSnJDYyGY27jZPx/bz1NHbHqmUs3ntbhtWPlTEHmLoxw5KkPHGmGxuqdBsLwN6i9cRO 2kr+Jm7I7lLUpQVQI8qheTCrU6DlVIy/nDTRe21lmc6TcjA+2x+I0mcnX+kK+LDNKF3L3AGneGrMj upamxg3raSfceZulbsfr8iTEGX/U9aJARS4fKcW5ccZtqvSGSlEydzkkUQpye8136dxkri9uVa/qU 0+6oftHevsdxzKjPr+wxvQNeXXMyerWwTYmtEmnJKC3fW7BJ8X1HeEOjFsx7f5q03MC1kXLGTuVMQ gDfxzbMg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1ulrmK-0000000BO10-2nbI; Tue, 12 Aug 2025 16:23:12 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uloSc-0000000Aq3j-1qEP for kexec@lists.infradead.org; Tue, 12 Aug 2025 12:50:39 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1755003037; 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=rmch9LxILHmDSZgEKLxWACfFjV5jmswbcfLkcrWwQo8=; b=jPQXWaKlsYJ73r/IaUWGLo05glYiekfRv3CKFh5TwkXxA8PzsCS21J+Lq6tAYGjRjoJm3q QWL2jQ6A0aPt/RQ0mjAS4rNiMDpvfe6tQDun1l9qLJtoFC2oMv9RENlVtRUFExkSJl4ZgV 1OIJfuQqBHcPtSZHBJ+IswBzuO/YgyI= Received: from mx-prod-mc-03.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-57-v2GUSWdCNJ2cbTTT3izsjQ-1; Tue, 12 Aug 2025 08:50:34 -0400 X-MC-Unique: v2GUSWdCNJ2cbTTT3izsjQ-1 X-Mimecast-MFC-AGG-ID: v2GUSWdCNJ2cbTTT3izsjQ_1755003030 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 0D25E19560B5; Tue, 12 Aug 2025 12:50:30 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.156]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id D92EC3001458; Tue, 12 Aug 2025 12:50:22 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, sj@kernel.org, lorenzo.stoakes@oracle.com, elver@google.com, snovitoll@gmail.com, Baoquan He Subject: [PATCH v2 05/12] arch/arm64: don't initialize kasan if it's disabled Date: Tue, 12 Aug 2025 20:49:34 +0800 Message-ID: <20250812124941.69508-6-bhe@redhat.com> In-Reply-To: <20250812124941.69508-1-bhe@redhat.com> References: <20250812124941.69508-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250812_055038_552306_DDCB327D X-CRM114-Status: UNSURE ( 9.33 ) X-CRM114-Notice: Please train this message. X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org And also add code to enable kasan_flag_enabled, this is for later usage. And also need skip kasan_populate_early_vm_area_shadow() if kasan is disabled. Signed-off-by: Baoquan He --- 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 d541ce45daeb..0e4ffe3f5d0e 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 +400,9 @@ void __init kasan_populate_early_vm_area_shadow(void *start, unsigned long size) void __init kasan_init(void) { + if (kasan_arg_disabled) + return; + kasan_init_shadow(); kasan_init_depth(); #if defined(CONFIG_KASAN_GENERIC) @@ -405,6 +411,7 @@ void __init kasan_init(void) * Software and Hardware Tag-Based modes still require * kasan_init_sw_tags() and kasan_init_hw_tags() correspondingly. */ + static_branch_enable(&kasan_flag_enabled); pr_info("KernelAddressSanitizer initialized (generic)\n"); #endif } -- 2.41.0