korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-09-22 12:44:11 +08:00
Code Issues Packages Projects Releases Wiki Activity

xen-netback: fix memory leaks on XenBus disconnect

Browse Source 
Eliminate memory leaks introduced several years ago by cleaning the
queue resources which are allocated on XenBus connection event. Namely, queue
structure array and pages used for IO rings.

Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Igor Druzhinin 2017-01-17 20:49:37 +00:00 committed by David S. Miller
parent 6acbe37160
commit 9a6cdf52b8
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/net/xen-netback/xenbus.c
View File

@ -493,11 +493,20 @@ static int backend_create_xenvif(struct backend_info *be)
static void backend_disconnect(struct backend_info *be)
{
if (be->vif) {
unsigned int queue_index;
xen_unregister_watchers(be->vif);
#ifdef CONFIG_DEBUG_FS
xenvif_debugfs_delif(be->vif);
#endif /* CONFIG_DEBUG_FS */
xenvif_disconnect_data(be->vif);
for (queue_index = 0; queue_index < be->vif->num_queues; ++queue_index)
xenvif_deinit_queue(&be->vif->queues[queue_index]);
vfree(be->vif->queues);
be->vif->num_queues = 0;
be->vif->queues = NULL;
xenvif_disconnect_ctrl(be->vif);
}
}
@ -1034,6 +1043,8 @@ static void connect(struct backend_info *be)
err:
if (be->vif->num_queues > 0)
xenvif_disconnect_data(be->vif); /* Clean up existing queues */
for (queue_index = 0; queue_index < be->vif->num_queues; ++queue_index)
xenvif_deinit_queue(&be->vif->queues[queue_index]);
vfree(be->vif->queues);
be->vif->queues = NULL;
be->vif->num_queues = 0;