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 7E930EFD208 for ; Wed, 25 Feb 2026 08:17:11 +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=pa4Mok84BgrIJ096oguK0x0r8biU2FN9KdJaqHRRdYY=; b=MbbbM7LzMSLw/3pdKWfxWA+Rp7 YsWbZNTqO/o6id2cXUr50sVg4viqwfrmkp8V4YNwHyJsIuy8Yzr8kB6v/BYEgK0WsGr3+JL9ewJ+D SSzVLz5LyfpmY80nu4lmGfu6io4QKiqYePm28l6ZBW4CEDd2ip3TjDvKu63Lus5nXimsze6d6czVB g7htdTYMltWPY8gpPHU54jpGPqQ9GKN5Jv5yglMs6W9nmQzzzyEgr55hb4Avw2/crtcwFnsNzr7gl izxHQuCeWD7+btP+CZ4QuAaPSwd+Idk/irmm/GY6Iy54u6gvnK01n4LXXCiwyP/a+QMt2gAuEMq/8 hUiP9T8A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvA4p-00000003WD0-3Oit; Wed, 25 Feb 2026 08:17:01 +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 1vvA4n-00000003W8k-1TyI for linux-arm-kernel@lists.infradead.org; Wed, 25 Feb 2026 08:16:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007416; 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=pa4Mok84BgrIJ096oguK0x0r8biU2FN9KdJaqHRRdYY=; b=dsmmaydCithuodbM4ydtn8WZ7Rv3I7zel8L38Unx90UigDLSxXAeaFNkTOrZ0N6ffMR6BS SdmEDH9yCNfPZyKK858Nui+B+6u9GTwc1HYsUHS1vZYYrlyA+MpNzzgUXpbPYzru7bL/U+ yfcG0mNe/ohuqFo3h5MJNvApo9rpkHU= 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-199-nAFljNsZOpiYJ57hUOCZnA-1; Wed, 25 Feb 2026 03:16:54 -0500 X-MC-Unique: nAFljNsZOpiYJ57hUOCZnA-1 X-Mimecast-MFC-AGG-ID: nAFljNsZOpiYJ57hUOCZnA_1772007412 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 32EB918003FC; Wed, 25 Feb 2026 08:16:52 +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 A81041800351; Wed, 25 Feb 2026 08:16:42 +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 13/15] arch/um: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:10 +0800 Message-ID: <20260225081412.76502-14-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: nYUpIPGCI1alEjq-zRSvBs-m5tekPun4tNkYc9dxZ18_1772007412 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_001657_491244_E2B40075 X-CRM114-Status: GOOD ( 11.04 ) 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 wrap up the kasan code into CONFIG_KASAN ifdeffery scope. Signed-off-by: Baoquan He Cc: linux-um@lists.infradead.org --- arch/um/kernel/mem.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index 89c8c8b94a79..2bf858ab35b5 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -62,8 +62,11 @@ static unsigned long brk_end; void __init arch_mm_preinit(void) { +#ifdef CONFIG_KASAN /* Safe to call after jump_label_init(). Enables KASAN. */ - kasan_init_generic(); + if (!kasan_arg_disabled) + kasan_init_generic(); +#endif /* clear the zero-page */ memset(empty_zero_page, 0, PAGE_SIZE); -- 2.52.0