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| author | Felix Fietkau <nbd@nbd.name> | 2024-01-04 19:10:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-01 13:13:33 +0100 |
| commit | 85720b69aef177318f4a18efbcc4302228a340e5 (patch) | |
| tree | c42b97f84a1211fd2809e4fed8b5c7aba6823c92 /net | |
| parent | d3032de2c83026a2c538ebb1d086765e97489b96 (diff) | |
| download | linux-85720b69aef177318f4a18efbcc4302228a340e5.tar.gz linux-85720b69aef177318f4a18efbcc4302228a340e5.tar.bz2 linux-85720b69aef177318f4a18efbcc4302228a340e5.zip | |
wifi: mac80211: fix race condition on enabling fast-xmit
[ Upstream commit bcbc84af1183c8cf3d1ca9b78540c2185cd85e7f ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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 0f97c6fcec17..e330036e02ea 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -683,6 +683,8 @@ 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: sta_info_hash_del(local, sta); diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 8bd01dfa75cb..5fd9a6f752a1 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2919,7 +2919,7 @@ 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) || |