From patchwork Fri Jul 20 00:45:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 946680 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 41WsdZ57Xdz9s4V for ; Fri, 20 Jul 2018 10:46:26 +1000 (AEST) Received: from localhost ([::1]:45919 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fgJYu-0007TQ-Bi for incoming@patchwork.ozlabs.org; Thu, 19 Jul 2018 20:46:24 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33447) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fgJYD-0007RS-VW for qemu-devel@nongnu.org; Thu, 19 Jul 2018 20:45:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fgJYC-0003gM-UH for qemu-devel@nongnu.org; Thu, 19 Jul 2018 20:45:42 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:36350 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fgJYC-0003g8-On; Thu, 19 Jul 2018 20:45:40 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 409CD81A88DE; Fri, 20 Jul 2018 00:45:40 +0000 (UTC) Received: from jason-ThinkPad-T450s.redhat.com (ovpn-12-42.pek2.redhat.com [10.72.12.42]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9FC3C111E40B; Fri, 20 Jul 2018 00:45:37 +0000 (UTC) From: Jason Wang To: peter.maydell@linaro.org, qemu-devel@nongnu.org Date: Fri, 20 Jul 2018 08:45:29 +0800 Message-Id: <1532047529-17961-3-git-send-email-jasowang@redhat.com> In-Reply-To: <1532047529-17961-1-git-send-email-jasowang@redhat.com> References: <1532047529-17961-1-git-send-email-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Fri, 20 Jul 2018 00:45:40 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Fri, 20 Jul 2018 00:45:40 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'jasowang@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PULL 2/2] tap: fix memory leak on success to create a tap device 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: Jason Wang , Yunjian Wang , qemu-stable@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Yunjian Wang The memory leak on success to create a tap device. And the nfds and nvhosts may not be the same and need to be processed separately. Fixes: 07825977 ("tap: fix memory leak on failure to create a multiqueue tap device") Fixes: 264986e2 ("tap: multiqueue support") Cc: qemu-stable@nongnu.org Signed-off-by: Yunjian Wang Signed-off-by: Jason Wang --- net/tap.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/net/tap.c b/net/tap.c index 2126f48..cc8525f 100644 --- a/net/tap.c +++ b/net/tap.c @@ -805,7 +805,8 @@ int net_init_tap(const Netdev *netdev, const char *name, } else if (tap->has_fds) { char **fds; char **vhost_fds; - int nfds, nvhosts; + int nfds = 0, nvhosts = 0; + int ret = 0; if (tap->has_ifname || tap->has_script || tap->has_downscript || tap->has_vnet_hdr || tap->has_helper || tap->has_queues || @@ -825,6 +826,7 @@ int net_init_tap(const Netdev *netdev, const char *name, if (nfds != nvhosts) { error_setg(errp, "The number of fds passed does not match " "the number of vhostfds passed"); + ret = -1; goto free_fail; } } @@ -833,6 +835,7 @@ int net_init_tap(const Netdev *netdev, const char *name, fd = monitor_fd_param(cur_mon, fds[i], &err); if (fd == -1) { error_propagate(errp, err); + ret = -1; goto free_fail; } @@ -843,6 +846,7 @@ int net_init_tap(const Netdev *netdev, const char *name, } else if (vnet_hdr != tap_probe_vnet_hdr(fd)) { error_setg(errp, "vnet_hdr not consistent across given tap fds"); + ret = -1; goto free_fail; } @@ -852,21 +856,21 @@ int net_init_tap(const Netdev *netdev, const char *name, vnet_hdr, fd, &err); if (err) { error_propagate(errp, err); + ret = -1; goto free_fail; } } - g_free(fds); - g_free(vhost_fds); - return 0; free_fail: + for (i = 0; i < nvhosts; i++) { + g_free(vhost_fds[i]); + } for (i = 0; i < nfds; i++) { g_free(fds[i]); - g_free(vhost_fds[i]); } g_free(fds); g_free(vhost_fds); - return -1; + return ret; } else if (tap->has_helper) { if (tap->has_ifname || tap->has_script || tap->has_downscript || tap->has_vnet_hdr || tap->has_queues || tap->has_vhostfds) {