diff options
| author | florian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2010-04-11 20:51:37 +0000 |
|---|---|---|
| committer | florian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2010-04-11 20:51:37 +0000 |
| commit | b02fa11a17a01d456ef0b71fb9d3725a6e0ed264 (patch) | |
| tree | 74b461f817e9248275cdec31f429a8126239c33c | |
| parent | 5788420c902c3adc3ff1df3e4b854de6cf38f21e (diff) | |
[kernel] swconfig: Check vlan/port indexes for validity.
Swconfig needs to make sure that requested vlans/ports actually exist,
else it might read or modify memory not belonging to itself.
This patch adds a quick range check in swconfig's kernel part to
prevent accidential or intentional memory modification.
Signed-off-by: Jonas Gorski <jonas.gorski+openwrt@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20811 3c298f89-4303-0410-b956-a3cf2f4a3e73
| -rw-r--r-- | target/linux/generic-2.6/files/drivers/net/phy/swconfig.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/files/drivers/net/phy/swconfig.c b/target/linux/generic-2.6/files/drivers/net/phy/swconfig.c index 7207e4659..bb49df83e 100644 --- a/target/linux/generic-2.6/files/drivers/net/phy/swconfig.c +++ b/target/linux/generic-2.6/files/drivers/net/phy/swconfig.c @@ -463,6 +463,8 @@ swconfig_lookup_attr(struct switch_dev *dev, struct genl_info *info, if (!info->attrs[SWITCH_ATTR_OP_VLAN]) goto done; val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_VLAN]); + if (val->port_vlan >= dev->vlans) + goto done; break; case SWITCH_CMD_SET_PORT: case SWITCH_CMD_GET_PORT: @@ -473,6 +475,8 @@ swconfig_lookup_attr(struct switch_dev *dev, struct genl_info *info, if (!info->attrs[SWITCH_ATTR_OP_PORT]) goto done; val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_PORT]); + if (val->port_vlan >= dev->ports) + goto done; break; default: WARN_ON(1); |