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mt76: mt76x02: add check for invalid vif idx

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On adding vifs the idx can become 1 + (7 & 7) = 8 for APs.
Check against that, as only AP vif idx 0-7 is possible.

Signed-off-by: Markus Theil <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Markus Theil
2019-12-22 15:17:42 +01:00
committed by Felix Fietkau
parent 8b5d3615e1
commit dc364547d9
1 changed files with 3 additions and 1 deletions
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mt76x02_util.c
+3 -1
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@@ -325,7 +325,9 @@ mt76x02_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
if (vif->type == NL80211_IFTYPE_STATION)
idx += 8;
if (dev->vif_mask & BIT(idx))
/* vif is already set or idx is 8 for AP/Mesh/... */
if (dev->vif_mask & BIT(idx) ||
(vif->type != NL80211_IFTYPE_STATION && idx > 7))
return -EBUSY;
dev->vif_mask |= BIT(idx);