This is a note to let you know that I've just added the patch titled mac80211_hwsim: initialize ieee80211_tx_info at hw_scan_work to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mac80211_hwsim-initialize-ieee80211_tx_info-at-hw_sc.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit b47c9fe6c88bcaa65b9d31f6906dd8d2fb238deb Author: JaeMan Park <jaeman@xxxxxxxxxx> Date: Thu Jan 13 15:02:35 2022 +0900 mac80211_hwsim: initialize ieee80211_tx_info at hw_scan_work [ Upstream commit cacfddf82baf1470e5741edeecb187260868f195 ] In mac80211_hwsim, the probe_req frame is created and sent while scanning. It is sent with ieee80211_tx_info which is not initialized. Uninitialized ieee80211_tx_info can cause problems when using mac80211_hwsim with wmediumd. wmediumd checks the tx_rates field of ieee80211_tx_info and doesn't relay probe_req frame to other clients even if it is a broadcasting message. Call ieee80211_tx_prepare_skb() to initialize ieee80211_tx_info for the probe_req that is created by hw_scan_work in mac80211_hwsim. Signed-off-by: JaeMan Park <jaeman@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220113060235.546107-1-jaeman@xxxxxxxxxx [fix memory leak] Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index 6cd9a8b610107..c84ee5ba53812 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -2082,6 +2082,15 @@ static void hw_scan_work(struct work_struct *work) if (req->ie_len) skb_put_data(probe, req->ie, req->ie_len); + if (!ieee80211_tx_prepare_skb(hwsim->hw, + hwsim->hw_scan_vif, + probe, + hwsim->tmp_chan->band, + NULL)) { + kfree_skb(probe); + continue; + } + local_bh_disable(); mac80211_hwsim_tx_frame(hwsim->hw, probe, hwsim->tmp_chan);