From patchwork Tue Jun 21 10:02:31 2016 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: 9190109 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0955A601C0 for ; Tue, 21 Jun 2016 10:03:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EC78E27FAD for ; Tue, 21 Jun 2016 10:03:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E11CA2807B; Tue, 21 Jun 2016 10:03:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8867D27FAD for ; Tue, 21 Jun 2016 10:03:44 +0000 (UTC) Received: from localhost ([::1]:50358 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFIX1-00057K-NU for patchwork-qemu-devel@patchwork.kernel.org; Tue, 21 Jun 2016 06:03:43 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46247) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFIWP-00054u-JN for qemu-devel@nongnu.org; Tue, 21 Jun 2016 06:03:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bFIWJ-0000Dg-A6 for qemu-devel@nongnu.org; Tue, 21 Jun 2016 06:03:05 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47782) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bFIWJ-0000Dc-45 for qemu-devel@nongnu.org; Tue, 21 Jun 2016 06:02:59 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8F2F485542; Tue, 21 Jun 2016 10:02:58 +0000 (UTC) Received: from localhost ([10.41.1.246]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u5LA2vwT010462; Tue, 21 Jun 2016 06:02:58 -0400 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Date: Tue, 21 Jun 2016 12:02:31 +0200 Message-Id: <1466503372-28334-4-git-send-email-marcandre.lureau@redhat.com> In-Reply-To: <1466503372-28334-1-git-send-email-marcandre.lureau@redhat.com> References: <1466503372-28334-1-git-send-email-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Tue, 21 Jun 2016 10:02:58 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 03/24] qemu-char: check socket is actually connected X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: yuanhan.liu@linux.intel.com, victork@redhat.com, mst@redhat.com, jonshin@cisco.com, mukawa@igel.co.jp, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Marc-André Lureau Calling qemu_chr_fe_set_msgfds() on unconnected socket can lead to crash if s->ioc is NULL. Signed-off-by: Marc-André Lureau --- qemu-char.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/qemu-char.c b/qemu-char.c index 84f49ac..06eaba3 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -2761,14 +2761,16 @@ static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num) { TCPCharDriver *s = chr->opaque; - if (!qio_channel_has_feature(s->ioc, - QIO_CHANNEL_FEATURE_FD_PASS)) { - return -1; - } /* clear old pending fd array */ g_free(s->write_msgfds); s->write_msgfds = NULL; + if (!s->connected || + !qio_channel_has_feature(s->ioc, + QIO_CHANNEL_FEATURE_FD_PASS)) { + return -1; + } + if (num) { s->write_msgfds = g_new(int, num); memcpy(s->write_msgfds, fds, num * sizeof(int));