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Subject[PATCH 3.18 074/120] cfg80211: nl80211_update_ft_ies() to validate NL80211_ATTR_IE
3.18-stable review patch.  If anyone has any objections, please let me know.


From: Arunk Khandavalli <>

[ Upstream commit 4f0223bfe9c3e62d8f45a85f1ef1b18a8a263ef9 ]

nl80211_update_ft_ies() tried to validate NL80211_ATTR_IE with
is_valid_ie_attr() before dereferencing it, but that helper function
returns true in case of NULL pointer (i.e., attribute not included).
This can result to dereferencing a NULL pointer. Fix that by explicitly
checking that NL80211_ATTR_IE is included.

Fixes: 355199e02b83 ("cfg80211: Extend support for IEEE 802.11r Fast BSS Transition")
Signed-off-by: Arunk Khandavalli <>
Signed-off-by: Jouni Malinen <>
Signed-off-by: Johannes Berg <>
Signed-off-by: Sasha Levin <>
Signed-off-by: Greg Kroah-Hartman <>
net/wireless/nl80211.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -9223,6 +9223,7 @@ static int nl80211_update_ft_ies(struct

if (!info->attrs[NL80211_ATTR_MDID] ||
+ !info->attrs[NL80211_ATTR_IE] ||
return -EINVAL;

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