linux-kernel - Re: [syzbot] [wireless?] WARNING in rate_control_rate

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Message-ID: <000000000000c01a51060b487f55@google.com>
Date:   Wed, 29 Nov 2023 03:04:28 -0800
From:   syzbot <syzbot+62d7eef57b09bfebcd84@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org
Subject: Re: [syzbot] [wireless?] WARNING in rate_control_rate_init

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

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