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wifi: mt76: add a wrapper for wcid access with validation

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Several places use rcu_dereference to get a wcid entry without validating
if the index exceeds the array boundary. Fix this by using a helper function,
which handles validation.

Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2025-07-04 20:46:06 +02:00
parent c4a114e2b8
commit 243e572d89
17 changed files with 41 additions and 68 deletions
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mt76.h
+10
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@@ -1229,6 +1229,16 @@ static inline int mt76_wed_dma_setup(struct mt76_dev *dev, struct mt76_queue *q,
#define mt76_dereference(p, dev) \
rcu_dereference_protected(p, lockdep_is_held(&(dev)->mutex))
static inline struct mt76_wcid *
__mt76_wcid_ptr(struct mt76_dev *dev, u16 idx)
{
if (idx >= ARRAY_SIZE(dev->wcid))
return NULL;
return rcu_dereference(dev->wcid[idx]);
}
#define mt76_wcid_ptr(dev, idx) __mt76_wcid_ptr(&(dev)->mt76, idx)
struct mt76_dev *mt76_alloc_device(struct device *pdev, unsigned int size,
const struct ieee80211_ops *ops,
const struct mt76_driver_ops *drv_ops);