linux-kernel - [ 053/109] qeth: repair crash in qeth_l3_vlan_rx_kill

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue,  7 Aug 2012 15:35:12 -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, Ursula Braun <ursula.braun@...ibm.com>,
	Frank Blaschka <frank.blaschka@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 053/109] qeth: repair crash in qeth_l3_vlan_rx_kill_vid()

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

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

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

From: Frank Blaschka <frank.blaschka@...ibm.com>

commit eabfbe6230ee7363681e7a561948d362b87169f0 upstream.

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.

Signed-off-by: Ursula Braun <ursula.braun@...ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@...ibm.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/s390/net/qeth_l3_main.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1818,6 +1818,8 @@ static void qeth_l3_free_vlan_addresses4
 	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;
@@ -1846,6 +1848,8 @@ static void qeth_l3_free_vlan_addresses6
 	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;

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/