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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2021-01-19 17:48:03 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-01-19 19:34:49 -0800 |
| commit | 8e4052c32d6b4b39c1e13c652c7e33748d447409 (patch) | |
| tree | 716a26084f94a0594cbb8736ee9cbd221f8ee904 /drivers/net/dsa/b53/b53_common.c | |
| parent | b160c28548bc0a87cbd16d5af6d3edcfd70b8c9a (diff) | |
| download | linux-8e4052c32d6b4b39c1e13c652c7e33748d447409.tar.bz2 | |
net: dsa: b53: fix an off by one in checking "vlan->vid"
The > comparison should be >= to prevent accessing one element beyond
the end of the dev->vlans[] array in the caller function, b53_vlan_add().
The "dev->vlans" array is allocated in the b53_switch_init() function
and it has "dev->num_vlans" elements.
Fixes: a2482d2ce349 ("net: dsa: b53: Plug in VLAN support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/YAbxI97Dl/pmBy5V@mwanda
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/dsa/b53/b53_common.c')
| -rw-r--r-- | drivers/net/dsa/b53/b53_common.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 288b5a5c3e0d..95c7fa171e35 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -1404,7 +1404,7 @@ int b53_vlan_prepare(struct dsa_switch *ds, int port, !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED)) return -EINVAL; - if (vlan->vid_end > dev->num_vlans) + if (vlan->vid_end >= dev->num_vlans) return -ERANGE; b53_enable_vlan(dev, true, ds->vlan_filtering); |