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wifi: mt76: mt7915: fix bounds checking for tx-free-done command

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According to the tx-free-done documentation, the DW4 can be repeated,
so have to be more careful about how we test for walking off the
end of the array.

Signed-off-by: Ben Greear <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Ben Greear
2022-10-01 14:38:05 +02:00
committed by Felix Fietkau
parent 9059a5de3b
commit d75f15ddeb
1 changed files with 5 additions and 3 deletions
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mt7915/mac.c
+5 -3
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@@ -903,17 +903,19 @@ mt7915_mac_tx_free(struct mt7915_dev *dev, void *data, int len)
total = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT);
v3 = (FIELD_GET(MT_TX_FREE_VER, txd) == 0x4);
if (WARN_ON_ONCE((void *)&tx_info[total >> v3] > end))
return;
for (cur_info = tx_info; count < total; cur_info++) {
u32 msdu, info = le32_to_cpu(*cur_info);
u32 msdu, info;
u8 i;
if (WARN_ON_ONCE((void *)cur_info >= end))
return;
/*
* 1'b1: new wcid pair.
* 1'b0: msdu_id with the same 'wcid pair' as above.
*/
info = le32_to_cpu(*cur_info);
if (info & MT_TX_FREE_PAIR) {
struct mt7915_sta *msta;
struct mt76_wcid *wcid;