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- From: Arunk Khandavalli <[email protected]>
- Date: Thu, 30 Aug 2018 00:40:16 +0300
- Subject: [PATCH] cfg80211: nl80211_update_ft_ies() to validate
- NL80211_ATTR_IE
- 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 <[email protected]>
- Signed-off-by: Jouni Malinen <[email protected]>
- Signed-off-by: Johannes Berg <[email protected]>
- ---
- --- a/net/wireless/nl80211.c
- +++ b/net/wireless/nl80211.c
- @@ -11763,6 +11763,7 @@ static int nl80211_update_ft_ies(struct
- return -EOPNOTSUPP;
-
- if (!info->attrs[NL80211_ATTR_MDID] ||
- + !info->attrs[NL80211_ATTR_IE] ||
- !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
- return -EINVAL;
-
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