Re: [syzbot] [wireless?] WARNING in rate_control_rate_init

[syzbot]

For archival purposes, forwarding an incoming command email to
linux-kernel@xxxxxxxxxxxxxxx.

***

Subject: [wireless?] WARNING in rate_control_rate_init
Author: eadavis@xxxxxx

please test WARNING in rate_control_rate_init

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 6e2332e0ab53

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 606b1b2e4123..d0b5a5dd7410 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1788,10 +1788,10 @@ static int sta_link_apply_parameters(struct ieee80211_local *local,
 					  lockdep_is_held(&local->hw.wiphy->mtx));
 
 	/*
-	 * If there are no changes, then accept a link that doesn't exist,
+	 * If there are no changes, then accept a link that exist,
 	 * unless it's a new link.
 	 */
-	if (params->link_id < 0 && !new_link &&
+	if ((sta->sta.valid_links & BIT(params->link_id)) && !new_link &&
 	    !params->link_mac && !params->txpwr_set &&
 	    !params->supported_rates_len &&
 	    !params->ht_capa && !params->vht_capa &&
-- 
2.43.0