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staging: rtl8192e: Fix potential use-after-free in rtllib_rx_Monitor()

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[ Upstream commit d30f4436f364b4ad915ca2c09be07cd0f93ceb44 ]

The skb is delivered to netif_rx() in rtllib_monitor_rx(), which may free it,
after calling this, dereferencing skb may trigger use-after-free.
Found by Smatch.

Fixes: 94a799425e ("From: wlanfae <wlanfae@realtek.com> [PATCH 1/8] rtl8192e: Import new version of driver from realtek")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20221123081253.22296-1-yuehaibing@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
YueHaibing 2022-11-23 16:12:53 +08:00 committed by Greg Kroah-Hartman
parent 288ada16a9
commit e5c97a433c
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/rtl8192e/rtllib_rx.c
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@ -1490,9 +1490,9 @@ static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
hdrlen += 4;
}
rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
ieee->stats.rx_packets++;
ieee->stats.rx_bytes += skb->len;
rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
return 1;
}