From b4f72e31b924bec2c18fe0b2a8c6462dbed9dcb2 Mon Sep 17 00:00:00 2001 From: Chen Gang Date: Wed, 17 Dec 2014 04:48:54 +0800 Subject: hw/net/xen_nic.c: Free 'netdev->txs' when map 'netdev->rxs' fails When map 'netdev->rxs' fails, need free the original resource, or will cause resource leak. Signed-off-by: Chen Gang Signed-off-by: Stefan Hajnoczi --- hw/net/xen_nic.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c index 63918ae1a0..7a57feb29b 100644 --- a/hw/net/xen_nic.c +++ b/hw/net/xen_nic.c @@ -370,11 +370,16 @@ static int net_connect(struct XenDevice *xendev) netdev->xendev.dom, netdev->tx_ring_ref, PROT_READ | PROT_WRITE); + if (!netdev->txs) { + return -1; + } netdev->rxs = xc_gnttab_map_grant_ref(netdev->xendev.gnttabdev, netdev->xendev.dom, netdev->rx_ring_ref, PROT_READ | PROT_WRITE); - if (!netdev->txs || !netdev->rxs) { + if (!netdev->rxs) { + xc_gnttab_munmap(netdev->xendev.gnttabdev, netdev->txs, 1); + netdev->txs = NULL; return -1; } BACK_RING_INIT(&netdev->tx_ring, netdev->txs, XC_PAGE_SIZE); -- cgit v1.2.3