From patchwork Thu Aug 5 13:57:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= X-Patchwork-Id: 1513919 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=S7fFu3HJ; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4GgVkk1pN6z9sRK for ; Fri, 6 Aug 2021 00:05:50 +1000 (AEST) Received: from localhost ([::1]:38010 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mBe0J-0004sq-UL for incoming@patchwork.ozlabs.org; Thu, 05 Aug 2021 10:05:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47742) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mBdtk-0008AV-1u for qemu-devel@nongnu.org; Thu, 05 Aug 2021 09:59:01 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:53044) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mBdth-00010W-3G for qemu-devel@nongnu.org; Thu, 05 Aug 2021 09:58:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628171936; 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=THZGEmL1ON3sOCgaZq2CNcN8xwiiSAihcDMZ4EzEkSY=; b=S7fFu3HJqm+1qwu0euCh7Jg3b8KX53eCcdlXf4VtKOZkSKsrZRMTAYEuRnp8CfTLyGjtdl s8YYPNmnEkuntMlhBDRHSb34Xc3ozMfJsCYLHLS32xVUDx3U7V5xJOntmQCPNtSWebhHi4 vpWEM/C47w/O1Y9b5qH7mKigkSiS1yU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-203-WWEdrQ7hO0ywktTiW7h-xA-1; Thu, 05 Aug 2021 09:58:55 -0400 X-MC-Unique: WWEdrQ7hO0ywktTiW7h-xA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 741A0190D345 for ; Thu, 5 Aug 2021 13:58:54 +0000 (UTC) Received: from localhost (unknown [10.39.208.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8C7B85C1D0; Thu, 5 Aug 2021 13:58:53 +0000 (UTC) From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Subject: [PATCH v3 09/18] ui/vdagent: disconnect handlers and reset state on finalize Date: Thu, 5 Aug 2021 17:57:06 +0400 Message-Id: <20210805135715.857938-10-marcandre.lureau@redhat.com> In-Reply-To: <20210805135715.857938-1-marcandre.lureau@redhat.com> References: <20210805135715.857938-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=marcandre.lureau@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.699, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Gerd Hoffmann Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Marc-André Lureau Avoid handlers being called with dangling pointers when the object is freed. Signed-off-by: Marc-André Lureau Reviewed-by: Philippe Mathieu-Daudé --- ui/vdagent.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/ui/vdagent.c b/ui/vdagent.c index 5ae5734c81..1a29016e07 100644 --- a/ui/vdagent.c +++ b/ui/vdagent.c @@ -721,22 +721,26 @@ static void vdagent_chr_accept_input(Chardev *chr) vdagent_send_buf(vd); } +static void vdagent_disconnect(VDAgentChardev *vd) +{ + vdagent_reset_bufs(vd); + vd->caps = 0; + if (vd->mouse_hs) { + qemu_input_handler_deactivate(vd->mouse_hs); + } + if (vd->cbpeer.update.notify) { + qemu_clipboard_peer_unregister(&vd->cbpeer); + memset(&vd->cbpeer, 0, sizeof(vd->cbpeer)); + } +} + static void vdagent_chr_set_fe_open(struct Chardev *chr, int fe_open) { VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr); if (!fe_open) { trace_vdagent_close(); - /* reset state */ - vdagent_reset_bufs(vd); - vd->caps = 0; - if (vd->mouse_hs) { - qemu_input_handler_deactivate(vd->mouse_hs); - } - if (vd->cbpeer.update.notify) { - qemu_clipboard_peer_unregister(&vd->cbpeer); - memset(&vd->cbpeer, 0, sizeof(vd->cbpeer)); - } + vdagent_disconnect(vd); return; } @@ -781,6 +785,7 @@ static void vdagent_chr_fini(Object *obj) { VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(obj); + vdagent_disconnect(vd); buffer_free(&vd->outbuf); }