linux-kernel - Re: [syzbot] [wireless?] divide error in mac80211_hwsim_set

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Message-ID: <tencent_36256BBAA7BB3833A69E7E1B514B2B1BA308@qq.com>
Date: Sun, 13 Apr 2025 13:35:29 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+064815c6cd721082a52a@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [wireless?] divide error in mac80211_hwsim_set_tsf

#syz test

diff --git a/drivers/net/wireless/virtual/mac80211_hwsim.c b/drivers/net/wireless/virtual/mac80211_hwsim.c
index cf3e976471c6..cd9e89aebb83 100644
--- a/drivers/net/wireless/virtual/mac80211_hwsim.c
+++ b/drivers/net/wireless/virtual/mac80211_hwsim.c
@@ -1226,6 +1226,11 @@ static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 {
 	struct mac80211_hwsim_data *data = hw->priv;
 	u64 now = mac80211_hwsim_get_tsf(hw, vif);
+	struct ieee80211_bss_conf *conf = link_conf_dereference_protected(vif,
+			data->link_data[0].link_id);
+
+	if (conf && !conf->enable_beacon)
+		return;
 	/* MLD not supported here */
 	u32 bcn_int = data->link_data[0].beacon_int;
 	u64 delta = abs(tsf - now);