From: Johannes Berg <johannes.berg@xxxxxxxxx>
The IBSS BSSID is never validated, so an
invalid one might end up being used. Fix
this by rejecting invalid configuration.
Reported-by: Marek Lindner <lindner_marek@xxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
net/wireless/nl80211.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/net/wireless/nl80211.c 2011-09-16 13:42:50.000000000 +0200
+++ b/net/wireless/nl80211.c 2011-09-16 13:43:49.000000000 +0200
@@ -4522,8 +4522,12 @@ static int nl80211_join_ibss(struct sk_b
wiphy = &rdev->wiphy;
- if (info->attrs[NL80211_ATTR_MAC])
+ if (info->attrs[NL80211_ATTR_MAC]) {
ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
+
+ if (!is_valid_ether_addr(ibss.bssid))
+ return -EINVAL;
+ }
ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
--
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