Before the patch, when users create bridge named "default", although
ovs-vsctl fails but vswitchd in the background will keep retrying it,
causing the systemd-udev to reach 100% cpu utilization. The reason is
due to frequent calls into kernel's register_netdevice function,
which will invoke several kernel elements who has registered on the
netdevice notifier chain. One of the notifier, the inetdev_event rejects
this devname and register_netdevice fails. The patch prohibits creating
"default" bridge name.
VMWare-BZ: #1842388
Signed-off-by: William Tu <u9012...@gmail.com>
---
vswitchd/bridge.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/vswitchd/bridge.c b/vswitchd/bridge.c
index ebb6249416fa..e8a22f82e1d6 100644
--- a/vswitchd/bridge.c
+++ b/vswitchd/bridge.c
@@ -1710,7 +1710,8 @@ add_del_bridges(const struct ovsrec_open_vswitch *cfg)
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
const struct ovsrec_bridge *br_cfg = cfg->bridges[i];
- if (strchr(br_cfg->name, '/') || strchr(br_cfg->name, '\\')) {
+ if (strchr(br_cfg->name, '/') || strchr(br_cfg->name, '\\')
+ || !strcmp(br_cfg->name, "default")) {
/* Prevent remote ovsdb-server users from accessing arbitrary
* directories, e.g. consider a bridge named "../../../etc/".
*
--
2.7.4
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