From patchwork Mon Oct 16 10:06:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juan Quintela X-Patchwork-Id: 13422875 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 5B0E7CDB465 for ; Mon, 16 Oct 2023 10:08:35 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qsKVg-0001RZ-7K; Mon, 16 Oct 2023 06:07:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qsKVa-0001Pe-Cj for qemu-devel@nongnu.org; Mon, 16 Oct 2023 06:07:34 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qsKVT-0007QW-Be for qemu-devel@nongnu.org; Mon, 16 Oct 2023 06:07:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697450846; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=OiLKIO5TbzSXhdgDp9tKmh2z6/MsAlT7rsSFH9LqfWY=; b=O+LPC2XSo9E0GsxvkwFhJPQ5zmPJHAxeNPOSOiZNLx5jtYjfzcdRHcaXXrTm90B/O5XQcY rKDG9vJi4Af02noh9Wd0sLiT8l/vhTZREE9LJ9bnD104OPFPcp6MkwpV9jRkCH+mzXsZmB Sw6UWIvRcAHaxWE6zfXIuLFMiL4k/EQ= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-157-YLwM_el-PyayI8FKVGjJfA-1; Mon, 16 Oct 2023 06:07:24 -0400 X-MC-Unique: YLwM_el-PyayI8FKVGjJfA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 3B1B93826D2B; Mon, 16 Oct 2023 10:07:24 +0000 (UTC) Received: from secure.mitica (unknown [10.39.194.127]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0008863F21; Mon, 16 Oct 2023 10:07:20 +0000 (UTC) From: Juan Quintela To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, Paolo Bonzini , Vladimir Sementsov-Ogievskiy , Fam Zheng , Cleber Rosa , Eric Blake , Li Zhijian , Peter Xu , Markus Armbruster , John Snow , Stefan Hajnoczi , Juan Quintela , Leonardo Bras , Laurent Vivier , Fabiano Rosas , Thomas Huth , Dmitry Frolov Subject: [PULL 04/38] migration: fix RAMBlock add NULL check Date: Mon, 16 Oct 2023 12:06:32 +0200 Message-ID: <20231016100706.2551-5-quintela@redhat.com> In-Reply-To: <20231016100706.2551-1-quintela@redhat.com> References: <20231016100706.2551-1-quintela@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 Received-SPF: pass client-ip=170.10.129.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, T_SPF_TEMPERROR=0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Dmitry Frolov qemu_ram_block_from_host() may return NULL, which will be dereferenced w/o check. Usualy return value is checked for this function. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Dmitry Frolov Reviewed-by: Fabiano Rosas Reviewed-by: Peter Xu Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Message-ID: <20231010104851.802947-1-frolov@swemel.ru> --- migration/ram.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/migration/ram.c b/migration/ram.c index 24d91de8b3..e8df4dc862 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -4285,6 +4285,11 @@ static void ram_mig_ram_block_resized(RAMBlockNotifier *n, void *host, RAMBlock *rb = qemu_ram_block_from_host(host, false, &offset); Error *err = NULL; + if (!rb) { + error_report("RAM block not found"); + return; + } + if (migrate_ram_is_ignored(rb)) { return; }