From: Phil Karn <karn@ka9q.net>
To: kaber@trash.net
Cc: netdev@vger.kernel.org
Subject: Off-by-one error in net/8021q/vlan.c
Date: Wed, 16 Feb 2011 02:58:23 -0800 [thread overview]
Message-ID: <4D5BADCF.5000804@ka9q.net> (raw)
The range check on vlan_id in register_vlan_device is off by one, and it
prevents the creation of a vlan interface for vlan ID 4095. (OSX allows
this, I checked.)
Here's the trivial patch:
--- linux-2.6.37/net/8021q/vlan.c~ 2011-01-04 16:50:19.000000000 -0800
+++ linux-2.6.37/net/8021q/vlan.c 2011-02-16 02:43:13.988812958 -0800
@@ -239,7 +239,7 @@
char name[IFNAMSIZ];
int err;
- if (vlan_id >= VLAN_VID_MASK)
+ if (vlan_id > VLAN_VID_MASK)
return -ERANGE;
err = vlan_check_real_dev(real_dev, vlan_id);
next reply other threads:[~2011-02-16 10:58 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-16 10:58 Phil Karn [this message]
2011-02-16 12:51 ` Off-by-one error in net/8021q/vlan.c richard -rw- weinberger
2011-02-16 13:22 ` Patrick McHardy
2011-02-16 15:58 ` Phil Karn
2011-02-16 16:10 ` richard -rw- weinberger
2011-02-16 16:28 ` Phil Karn
2011-02-16 16:35 ` richard -rw- weinberger
2011-02-16 16:39 ` Eric Dumazet
2011-02-16 18:41 ` Michał Mirosław
2011-02-21 19:26 ` Brent Cook
2011-02-21 21:47 ` Phil Karn
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