Commit 9c167b2d authored Jul 20, 2020 by Julian Squires Committed by Johannes Berg Jul 31, 2020

cfg80211: allow vendor dumpit to terminate by returning 0



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>

parent f2a0c187

net/wireless/nl80211.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -13479,7 +13479,7 @@ static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
		if (err == -ENOBUFS \|\| err == -ENOENT) {
		genlmsg_cancel(skb, hdr);
		break;
		} else if (err) {
		} else if (err <= 0) {
		genlmsg_cancel(skb, hdr);
		goto out;
		}