diff options
| author | Felix Fietkau <nbd@nbd.name> | 2024-01-04 19:10:59 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2024-01-18 14:51:15 +0100 |
| commit | bcbc84af1183c8cf3d1ca9b78540c2185cd85e7f (patch) | |
| tree | 456b103b61c063ea6e967c61000d823f13b59320 /net | |
| parent | wifi: iwlwifi: fix a memory corruption (diff) | |
| download | linux-bcbc84af1183c8cf3d1ca9b78540c2185cd85e7f.tar.xz linux-bcbc84af1183c8cf3d1ca9b78540c2185cd85e7f.zip | |
wifi: mac80211: fix race condition on enabling fast-xmit
fast-xmit must only be enabled after the sta has been uploaded to the driver,
otherwise it could end up passing the not-yet-uploaded sta via drv_tx calls
to the driver, leading to potential crashes because of uninitialized drv_priv
data.
Add a missing sta->uploaded check and re-check fast xmit after inserting a sta.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://msgid.link/20240104181059.84032-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/sta_info.c | 2 | ||||
| -rw-r--r-- | net/mac80211/tx.c | 2 |
2 files changed, 3 insertions, 1 deletions
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index c33decbb97f2..bcf3f727fc6d 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -913,6 +913,8 @@ static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) if (ieee80211_vif_is_mesh(&sdata->vif)) mesh_accept_plinks_update(sdata); + ieee80211_check_fast_xmit(sta); + return 0; out_remove: if (sta->sta.valid_links) diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index ed4fdf655343..4b2823e36a37 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -3048,7 +3048,7 @@ void ieee80211_check_fast_xmit(struct sta_info *sta) sdata->vif.type == NL80211_IFTYPE_STATION) goto out; - if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) + if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED) || !sta->uploaded) goto out; if (test_sta_flag(sta, WLAN_STA_PS_STA) || |