From: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
[ Upstream commit cc8e7c69db4dcc565ed3020f97ddd6debab6cbe8 ]
IFLA_VXLAN_* attributes are in the data array, which is correctly
used when fetching the value, but not when setting the extended
ack. Because IFLA_VXLAN_MAX < IFLA_MAX, we avoid out of bounds
array accesses, but we don't provide a pointer to the invalid
attribute to userspace.
Fixes: 653ef6a3e4af ("vxlan: change vxlan_[config_]validate() to use netlink_ext_ack for error reporting")
Fixes: b4d3069783bc ("vxlan: Allow configuration of DF behaviour")
Signed-off-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/vxlan.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -3144,7 +3144,7 @@ static int vxlan_validate(struct nlattr
u32 id = nla_get_u32(data[IFLA_VXLAN_ID]);
if (id >= VXLAN_N_VID) {
- NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_ID],
+ NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VXLAN_ID],
"VXLAN ID must be lower than 16777216");
return -ERANGE;
}
@@ -3155,7 +3155,7 @@ static int vxlan_validate(struct nlattr
= nla_data(data[IFLA_VXLAN_PORT_RANGE]);
if (ntohs(p->high) < ntohs(p->low)) {
- NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_PORT_RANGE],
+ NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VXLAN_PORT_RANGE],
"Invalid source port range");
return -EINVAL;
}
@@ -3165,7 +3165,7 @@ static int vxlan_validate(struct nlattr
enum ifla_vxlan_df df = nla_get_u8(data[IFLA_VXLAN_DF]);
if (df < 0 || df > VXLAN_DF_MAX) {
- NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_DF],
+ NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VXLAN_DF],
"Invalid DF attribute");
return -EINVAL;
}
