From: Arunk Khandavalli akhandav@codeaurora.org
[ 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 akhandav@codeaurora.org Signed-off-by: Jouni Malinen jouni@codeaurora.org Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- net/wireless/nl80211.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index fefc9a4d3592..2e1633ac93f7 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -9223,6 +9223,7 @@ static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info) return -EOPNOTSUPP;
if (!info->attrs[NL80211_ATTR_MDID] || + !info->attrs[NL80211_ATTR_IE] || !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) return -EINVAL;