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-rw-r--r--net/mac80211/mlme.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index dc60804d6dd0..1619e0cd26e2 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -441,6 +441,9 @@ static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid)
u8 index, indexn1, indexn2;
struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
+ if (unlikely(!tim || elems->tim_len < 4))
+ return false;
+
aid &= 0x3fff;
index = aid / 8;
mask = 1 << (aid & 7);