[PATCH AUTOSEL 4.9 5/5] mac80211: do not allow bigger VHT MPDUs than the hardware supports
From: Sasha Levin <sashal@kernel.org>
Date: 2020-09-29 01:33:23
Also in:
linux-wireless, lkml, stable
Subsystem:
mac80211, the rest · Maintainers:
Johannes Berg, Linus Torvalds
From: Felix Fietkau <nbd@nbd.name> [ Upstream commit 3bd5c7a28a7c3aba07a2d300d43f8e988809e147 ] Limit maximum VHT MPDU size by local capability. Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20200917125031.45009-1-nbd@nbd.name (local) Signed-off-by: Johannes Berg <redacted> Signed-off-by: Sasha Levin <sashal@kernel.org> --- net/mac80211/vht.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
index 43e45bb660bcd..b1d3fa708e16b 100644
--- a/net/mac80211/vht.c
+++ b/net/mac80211/vht.c@@ -170,10 +170,7 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata, /* take some capabilities as-is */ cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info); vht_cap->cap = cap_info; - vht_cap->cap &= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 | - IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 | - IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 | - IEEE80211_VHT_CAP_RXLDPC | + vht_cap->cap &= IEEE80211_VHT_CAP_RXLDPC | IEEE80211_VHT_CAP_VHT_TXOP_PS | IEEE80211_VHT_CAP_HTC_VHT | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
@@ -182,6 +179,9 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata, IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN; + vht_cap->cap |= min_t(u32, cap_info & IEEE80211_VHT_CAP_MAX_MPDU_MASK, + own_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK); + /* and some based on our own capabilities */ switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
--
2.25.1