From: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx>
This patch fixes a missing bridge port check caught by smatch.
setlink/dellink of attributes like vlans can come for a bridge device
and there is no need to offload those today. So, this patch adds a bridge
port check. (In these cases however, the BRIDGE_SELF flags will always be set
and we may not hit a problem with the current code).
smatch complaint:
The patch 68e331c785b8: "bridge: offload bridge port attributes to
switch asic if feature flag set" from Jan 29, 2015, leads to the
following Smatch complaint:
net/bridge/br_netlink.c:552 br_setlink()
error: we previously assumed 'p' could be null (see line 518)
net/bridge/br_netlink.c
517
518 if (p && protinfo) {
^
Check for NULL.
Reported-By: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx>
---
net/bridge/br_netlink.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index b93f42c..4fbcea0 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -543,7 +543,7 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
afspec, RTM_SETLINK);
}
- if (!(flags & BRIDGE_FLAGS_SELF)) {
+ if (p && !(flags & BRIDGE_FLAGS_SELF)) {
/* set bridge attributes in hardware if supported
*/
ret_offload = netdev_switch_port_bridge_setlink(dev, nlh,
@@ -583,7 +583,7 @@ int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
*/
br_ifinfo_notify(RTM_NEWLINK, p);
- if (!(flags & BRIDGE_FLAGS_SELF)) {
+ if (p && !(flags & BRIDGE_FLAGS_SELF)) {
/* del bridge attributes in hardware
*/
ret_offload = netdev_switch_port_bridge_dellink(dev, nlh,
--
1.7.10.4
