[ Upstream commit 02c665f048a439c0d58cc45334c94634bd7c18e6 ]

If the interface isn't enabled, don't apply multicast rate changes immediately.

Reported-by: syzbot+de87c09cc7b964ea2e23@syzkaller.appspotmail.com Signed-off-by: Johannes Berg johannes.berg@intel.com [oficerovas: Backported to 5.10 and 5.15] Signed-off-by: Alexander Ofitserov oficerovas@altlinux.org Signed-off-by: Alexandr Shashkin dutyrok@altlinux.org --- Changes in v2: - edit comment of oficerovas and add upstream commit --- net/mac80211/cfg.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 0c3da7771b48..13ac16026129 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2560,7 +2560,8 @@ static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev, memcpy(sdata->vif.bss_conf.mcast_rate, rate, sizeof(int) * NUM_NL80211_BANDS);

- ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MCAST_RATE); + if (ieee80211_sdata_running(sdata)) + ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MCAST_RATE);

return 0; }