From: Felix Fietkau nbd@nbd.name
[ Upstream commit 9379df2fd9234e3b67a23101c2370c99f6af6d77 ]
During the cleanup of the aggregation session, a rx handler (or release timer) on another CPU might still hold a pointer to the reorder buffer and could attempt to release some packets. Clearing pointers during cleanup avoids a theoretical use-after-free bug here.
Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/mediatek/mt76/agg-rx.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/net/wireless/mediatek/mt76/agg-rx.c b/drivers/net/wireless/mediatek/mt76/agg-rx.c index d44d57e6eb27a..97df6b3a472b1 100644 --- a/drivers/net/wireless/mediatek/mt76/agg-rx.c +++ b/drivers/net/wireless/mediatek/mt76/agg-rx.c @@ -278,6 +278,7 @@ static void mt76_rx_aggr_shutdown(struct mt76_dev *dev, struct mt76_rx_tid *tid) if (!skb) continue;
+ tid->reorder_buf[i] = NULL; tid->nframes--; dev_kfree_skb(skb); }