This is a note to let you know that I've just added the patch titled
staging: rtl8192e: Fix potential use-after-free in rtllib_rx_Monitor()
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
staging-rtl8192e-fix-potential-use-after-free-in-rtl.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e1b3cc2880172c81daddaba82726f9de897e74db
Author: YueHaibing <yuehaibing@xxxxxxxxxx>
Date: Wed Nov 23 16:12:53 2022 +0800
staging: rtl8192e: Fix potential use-after-free in rtllib_rx_Monitor()
[ 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: 94a799425eee ("From: wlanfae <wlanfae@xxxxxxxxxxx> [PATCH 1/8] rtl8192e: Import new version of driver from realtek")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221123081253.22296-1-yuehaibing@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/staging/rtl8192e/rtllib_rx.c b/drivers/staging/rtl8192e/rtllib_rx.c
index 3bfd63fe4ac1..004d89853a68 100644
--- a/drivers/staging/rtl8192e/rtllib_rx.c
+++ b/drivers/staging/rtl8192e/rtllib_rx.c
@@ -1500,9 +1500,9 @@ 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;
}
