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-rw-r--r--package/kernel/mac80211/patches/subsys/331-mac80211-do-not-allow-bigger-VHT-MPDUs-than-the-hard.patch34
1 files changed, 34 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/331-mac80211-do-not-allow-bigger-VHT-MPDUs-than-the-hard.patch b/package/kernel/mac80211/patches/subsys/331-mac80211-do-not-allow-bigger-VHT-MPDUs-than-the-hard.patch
new file mode 100644
index 0000000000..ce39fe0d8b
--- /dev/null
+++ b/package/kernel/mac80211/patches/subsys/331-mac80211-do-not-allow-bigger-VHT-MPDUs-than-the-hard.patch
@@ -0,0 +1,34 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Thu, 17 Sep 2020 12:07:19 +0200
+Subject: [PATCH] mac80211: do not allow bigger VHT MPDUs than the hardware
+ supports
+
+Limit maximum VHT MPDU size by local capability
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/vht.c
++++ b/net/mac80211/vht.c
+@@ -170,10 +170,7 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(stru
+ /* 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(stru
+ 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: