nl80211 vendor netlink dumpit, like netlink_callback->dump, should
signal successful completion by returning 0.
Currently, that will just cause dumpit to be called again, possibly
many times until an error occurs. Since skb->len is never going to be
0 by the time dumpit is called, the only way for dumpit to signal
completion is by returning an error. If it returns a positive value,
the current message is cancelled, but that positive value is returned
and nl80211_vendor_cmd_dump gets called again.
Fix that by passing a return value of 0 through.
Signed-off-by: Julian Squires <julian@cipht.net>
Link: https://lore.kernel.org/r/20200720145033.401307-1-julian@cipht.net
[reword commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
if (err == -ENOBUFS || err == -ENOENT) {
genlmsg_cancel(skb, hdr);
break;
- } else if (err) {
+ } else if (err <= 0) {
genlmsg_cancel(skb, hdr);
goto out;
}