diff options
| author | Antonio Quartulli <ordex@autistici.org> | 2012-10-26 18:54:25 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-17 13:18:34 -0800 |
| commit | 0355494503b5922528b72a129de874bbe526f9c7 (patch) | |
| tree | e36aa9579ed0e371132c9830199b7062aeee2e27 | |
| parent | 3a817522b33cb42171cd36f5fa77fa40f447f351 (diff) | |
| download | lwn-0355494503b5922528b72a129de874bbe526f9c7.tar.gz lwn-0355494503b5922528b72a129de874bbe526f9c7.zip | |
mac80211: fix SSID copy on IBSS JOIN
commit badecb001a310408d3473b1fc2ed5aefd0bc92a9 upstream.
The 'ssid' field of the cfg80211_ibss_params is a u8 pointer and
its length is likely to be less than IEEE80211_MAX_SSID_LEN most
of the time.
This patch fixes the ssid copy in ieee80211_ibss_join() by using
the SSID length to prevent it from reading beyond the string.
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
[rewrapped commit message, small rewording]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/mac80211/ibss.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 5746d62faba1..327aa076c2bb 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -1074,7 +1074,7 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; sdata->u.ibss.ibss_join_req = jiffies; - memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN); + memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); sdata->u.ibss.ssid_len = params->ssid_len; mutex_unlock(&sdata->u.ibss.mtx); |