linux-kernel - [ 080/109] net: Fix memory leak

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Date:	Tue,  7 Aug 2012 15:35:39 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Amir Hanania <amir.hanania@...el.com>,
	John Fastabend <john.r.fastabend@...el.com>,
	Aaron Brown <aaron.f.brown@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 080/109] net: Fix memory leak - vlan_info struct

From: Greg KH <gregkh@...uxfoundation.org>

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------


From: Amir Hanania <amir.hanania@...el.com>

[ Upstream commit efc73f4bbc238d4f579fb612c04c8e1dd8a82979 ]

In driver reload test there is a memory leak.
The structure vlan_info was not freed when the driver was removed.
It was not released since the nr_vids var is one after last vlan was removed.
The nr_vids is one, since vlan zero is added to the interface when the interface
is being set, but the vlan zero is not deleted at unregister.
Fix - delete vlan zero when we unregister the device.

Signed-off-by: Amir Hanania <amir.hanania@...el.com>
Acked-by: John Fastabend <john.r.fastabend@...el.com>
Tested-by: Aaron Brown <aaron.f.brown@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/8021q/vlan.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -403,6 +403,9 @@ static int vlan_device_event(struct noti
 		break;
 
 	case NETDEV_DOWN:
+		if (dev->features & NETIF_F_HW_VLAN_FILTER)
+			vlan_vid_del(dev, 0);
+
 		/* Put all VLANs for this dev in the down state too.  */
 		for (i = 0; i < VLAN_N_VID; i++) {
 			vlandev = vlan_group_get_device(grp, i);


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