On 12/18/2017 04:24 AM, Toshiaki Makita wrote:
> On 2017/12/16 20:31, Nikolay Aleksandrov wrote:
[snip]
> ...
>> err = br_changelink(dev, tb, data, extack);
>> - if (err)
>> + if (err) {
>> + /* clean possible fdbs from br_stp_change_bridge_id above */
>> + br_fdb_delete_by_port(br, NULL, 0, 1);
>
> Don't we need to call br_dev_delete (br_link_ops.dellink) after
> successful register instead of br_fdb_delete?
> Particularly I'm wondering if not calling br_sysfs_delbr() is ok or not.
>
Funny, that is actually the only reason we need to call it (br_sysfs_delbr). :-)
Good catch, that is another leak - the bridge sysfs entries are registered when
NETDEV_REGISTER event happens (register_netdevice) but are not properly cleaned
up
on error there. This has also been present since the introduction of changelink
during newlink, commit:
b6677449dff6 ("bridge: netlink: call br_changelink() during br_dev_newlink()")
I'll send v2 that does br_dev_delete(dev, NULL) instead of the current cleanup.
With kobject debug enabled and that I can see "brif" and the rest of the sysfs
files getting freed properly, while before they weren't.
Thanks,
Nik
