From 39193498913f82dd7e484aa908843ca4114c3b0c Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 16 Sep 2011 13:45:25 +0200 Subject: [PATCH] cfg80211: validate IBSS BSSID 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 Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/wireless/nl80211.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 11089541bb03..430b432bc3f0 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -4527,8 +4527,12 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info) 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]); -- 2.30.2