From 7957a9dea8bf58b02e6ebf28f91c4bce74b5c91c Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 6 Aug 2018 22:49:13 -0700
Subject: [PATCH] mac80211: Don't access sk_queue_head->next directly.
Use __skb_peek() instead.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/mac80211/rx.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index c6bfd4019d44d..a0ca27aeb7329 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2077,6 +2077,7 @@ ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
idx = sdata->fragment_next;
for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
struct ieee80211_hdr *f_hdr;
+ struct sk_buff *f_skb;
idx--;
if (idx < 0)
@@ -2088,7 +2089,8 @@ ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata,
entry->last_frag + 1 != frag)
continue;
- f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data;
+ f_skb = __skb_peek(&entry->skb_list);
+ f_hdr = (struct ieee80211_hdr *) f_skb->data;
/*
* Check ftype and addresses are equal, else check next fragment
--
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