If, by any reason, parallelsNetworkOpen fails it dereferences newly allocated privconn->networks via virObjectUnref, which in turn deallocates its memory. Subsequent call of parallelsNetworkClose calls virObjectUnref that leads to double memory free. To prevent this we should zero privconn->networks to make all subsequent virObjectUnref be safe. Signed-off-by: Maxim Nestratov <mnestratov(a)parallels.com&gt; --- src/parallels/parallels_network.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/src/parallels/parallels_network.c b/src/parallels/parallels_network.c index 8cc0582..8caad4a 100644 --- a/src/parallels/parallels_network.c +++ b/src/parallels/parallels_network.c @@ -348,6 +348,7 @@ parallelsNetworkOpen(virConnectPtr conn, return VIR_DRV_OPEN_SUCCESS; error: virObjectUnref(privconn->networks); + privconn->networks = NULL; return VIR_DRV_OPEN_DECLINED; }