Patch "rtl8xxxu: Fix memory leak in handling rxdesc16 packets" has been added to the 4.8-stable tree

This is a note to let you know that I've just added the patch titled

rtl8xxxu: Fix memory leak in handling rxdesc16 packets

to the 4.8-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:
rtl8xxxu-fix-memory-leak-in-handling-rxdesc16-packets.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Jes Sorensen <[email protected]>
Date: Thu, 29 Sep 2016 15:40:54 -0400
Subject: rtl8xxxu: Fix memory leak in handling rxdesc16 packets

From: Jes Sorensen <[email protected]>

commit 1e54134ccad00f76ddf00f3e77db3dc8fdefbb47 upstream.

A device running without RX package aggregation could return more data in the USB packet than the actual network packet. In this case we could would clone the skb but then determine that that there was no packet to handle and exit without freeing the cloned skb first.

This has so far only been observed with 8188eu devices, but could affect others.

---
 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

@@ -5201,7 +5201,12 @@ int rtl8xxxu_parse_rxdesc16(struct rtl8x
 		pkt_offset = roundup(pkt_len + drvinfo_sz + desc_shift +
 				     sizeof(struct rtl8xxxu_rxdesc16), 128);
 
-		if (pkt_cnt > 1)
+		/*
+		 * Only clone the skb if there's enough data at the end to
+		 * at least cover the rx descriptor
+		 */
+		if (pkt_cnt > 1 &&
+		    urb_len > (pkt_offset + sizeof(struct rtl8xxxu_rxdesc16)))
 			next_skb = skb_clone(skb, GFP_ATOMIC);
 
 		rx_status = IEEE80211_SKB_RXCB(skb);

Patches currently in stable-queue which might be from [email protected] are

queue-4.8/rtl8xxxu-fix-memory-leak-in-handling-rxdesc16-packets.patch queue-4.8/rtl8xxxu-fix-big-endian-problem-reporting-mactime.patch queue-4.8/rtl8xxxu-fix-rtl8723bu-driver-reload-issue.patch