diff options
| author | Lv Yunlong <lyl2019@mail.ustc.edu.cn> | 2021-04-02 11:26:27 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-14 10:50:13 +0200 |
| commit | 2fc2b00a500fb57659acc17f61ea010c5fbac4b0 (patch) | |
| tree | 2b3e62d90180c93ac9421ce5005f45943f05cd15 | |
| parent | b37bc7747dd46828a7ecb4b637227309b8b4239d (diff) | |
mwl8k: Fix a double Free in mwl8k_probe_hw
[ Upstream commit a8e083ee8e2a6c94c29733835adae8bf5b832748 ]
In mwl8k_probe_hw, hw->priv->txq is freed at the first time by
dma_free_coherent() in the call chain:
if(!priv->ap_fw)->mwl8k_init_txqs(hw)->mwl8k_txq_init(hw, i).
Then in err_free_queues of mwl8k_probe_hw, hw->priv->txq is freed
at the second time by mwl8k_txq_deinit(hw, i)->dma_free_coherent().
My patch set txq->txd to NULL after the first free to avoid the
double free.
Fixes: a66098daacee2 ("mwl8k: Marvell TOPDOG wireless driver")
Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210402182627.4256-1-lyl2019@mail.ustc.edu.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/wireless/marvell/mwl8k.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/wireless/marvell/mwl8k.c b/drivers/net/wireless/marvell/mwl8k.c index abf3b0233ccc..e98e7680eb53 100644 --- a/drivers/net/wireless/marvell/mwl8k.c +++ b/drivers/net/wireless/marvell/mwl8k.c @@ -1474,6 +1474,7 @@ static int mwl8k_txq_init(struct ieee80211_hw *hw, int index) if (txq->skb == NULL) { dma_free_coherent(&priv->pdev->dev, size, txq->txd, txq->txd_dma); + txq->txd = NULL; return -ENOMEM; } |