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mt76: clear skb pointers from rx aggregation reorder buffer during cleanup 

[ Upstream commit 9379df2fd9 ]

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>
5.4-rM2-2.2.x-imx-squashed
Felix Fietkau 2019-12-14 00:15:26 +01:00 committed by Greg Kroah-Hartman
parent 1841613e97
commit 9b42bfb06d
1 changed files with 1 additions and 0 deletions
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drivers/net/wireless/mediatek/mt76/agg-rx.c
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@ -268,6 +268,7 @@ 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);
}