From patchwork Tue Feb 2 07:08:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pavel Dovgalyuk X-Patchwork-Id: 12060873 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3B6BC433E0 for ; Tue, 2 Feb 2021 07:09:32 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C13AE64ED4 for ; Tue, 2 Feb 2021 07:09:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C13AE64ED4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=ispras.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37026 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l6poY-0000GM-NN for qemu-devel@archiver.kernel.org; Tue, 02 Feb 2021 02:09:30 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:42886) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l6pnl-0008Ih-M1 for qemu-devel@nongnu.org; Tue, 02 Feb 2021 02:08:41 -0500 Received: from mail.ispras.ru ([83.149.199.84]:54668) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l6pnj-0004Wm-FL for qemu-devel@nongnu.org; Tue, 02 Feb 2021 02:08:41 -0500 Received: from [127.0.1.1] (unknown [62.118.151.149]) by mail.ispras.ru (Postfix) with ESMTPSA id 7E7B140D4004; Tue, 2 Feb 2021 07:08:31 +0000 (UTC) Subject: [PATCH] char: don't fail when client is not connected From: Pavel Dovgalyuk To: qemu-devel@nongnu.org Date: Tue, 02 Feb 2021 10:08:31 +0300 Message-ID: <161224971122.79781.8594358970645859667.stgit@pasha-ThinkPad-X280> User-Agent: StGit/0.23 MIME-Version: 1.0 Received-SPF: pass client-ip=83.149.199.84; envelope-from=pavel.dovgalyuk@ispras.ru; helo=mail.ispras.ru X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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: pbonzini@redhat.com, pavel.dovgalyuk@ispras.ru, marcandre.lureau@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This patch checks that ioc is not null before using it in tcp socket tcp_chr_add_watch function. Signed-off-by: Pavel Dovgalyuk Reviewed-by: Marc-André Lureau --- chardev/char-socket.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/chardev/char-socket.c b/chardev/char-socket.c index 213a4c8dd0..cef1d9438f 100644 --- a/chardev/char-socket.c +++ b/chardev/char-socket.c @@ -385,6 +385,9 @@ static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len) static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond) { SocketChardev *s = SOCKET_CHARDEV(chr); + if (!s->ioc) { + return NULL; + } return qio_channel_create_watch(s->ioc, cond); }