From eabfbe6230ee7363681e7a561948d362b87169f0 Mon Sep 17 00:00:00 2001 From: "frank.blaschka@de.ibm.com" Date: Tue, 24 Jul 2012 22:34:29 +0000 Subject: [PATCH] qeth: repair crash in qeth_l3_vlan_rx_kill_vid() Commit efc73f4b "net: Fix memory leak - vlan_info struct" adds deletion of VLAN 0 for devices with feature NETIF_F_HW_VLAN_FILTER. For driver qeth these are the layer 3 devices. Usually there exists no separate vlan net_device for VLAN 0. Thus the qeth functions qeth_l3_free_vlan_addresses4() and qeth_l3_free_vlan_addresses6() require an extra checking if function __vlan_find_dev_deep() returns with a net_device. Cc: stable@vger.kernel.org Signed-off-by: Ursula Braun Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- drivers/s390/net/qeth_l3_main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 0cf706699a04..c5f03fa70fba 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -1758,6 +1758,8 @@ static void qeth_l3_free_vlan_addresses4(struct qeth_card *card, QETH_CARD_TEXT(card, 4, "frvaddr4"); netdev = __vlan_find_dev_deep(card->dev, vid); + if (!netdev) + return; in_dev = in_dev_get(netdev); if (!in_dev) return; @@ -1786,6 +1788,8 @@ static void qeth_l3_free_vlan_addresses6(struct qeth_card *card, QETH_CARD_TEXT(card, 4, "frvaddr6"); netdev = __vlan_find_dev_deep(card->dev, vid); + if (!netdev) + return; in6_dev = in6_dev_get(netdev); if (!in6_dev) return;