diff mbox

[PULL,2/4] hw/net/xen_nic.c: Free 'netdev->txs' when map 'netdev->rxs' fails

Message ID 1421058466-5473-3-git-send-email-stefanha@redhat.com
State New
Headers show

Commit Message

Stefan Hajnoczi Jan. 12, 2015, 10:27 a.m. UTC 
From: Chen Gang <gang.chen.5i5j@gmail.com>

When map 'netdev->rxs' fails, need free the original resource, or will
cause resource leak.

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 hw/net/xen_nic.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c
index 63918ae..7a57feb 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);