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authorBrian Norris <briannorris@chromium.org>2016-11-08 18:28:24 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-12-08 07:15:24 +0100
commitd7a2c259fc1f41c3c030868b0344112c92f06c34 (patch)
tree46c4fb3401ec5b6e6b4455472999c1c140890e50 /drivers
parentac6e42d7a7201245e9a8db922ad795ef2a257568 (diff)
mwifiex: printk() overflow with 32-byte SSIDs
commit fcd2042e8d36cf644bd2d69c26378d17158b17df upstream. SSIDs aren't guaranteed to be 0-terminated. Let's cap the max length when we print them out. This can be easily noticed by connecting to a network with a 32-octet SSID: [ 3903.502925] mwifiex_pcie 0000:01:00.0: info: trying to associate to '0123456789abcdef0123456789abcdef <uninitialized mem>' bssid xx:xx:xx:xx:xx:xx Fixes: 5e6e3a92b9a4 ("wireless: mwifiex: initial commit for Marvell mwifiex driver") Signed-off-by: Brian Norris <briannorris@chromium.org> Acked-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/mwifiex/cfg80211.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 4073116e6e9f..c3331d6201c3 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -2144,8 +2144,9 @@ done:
is_scanning_required = 1;
} else {
mwifiex_dbg(priv->adapter, MSG,
- "info: trying to associate to '%s' bssid %pM\n",
- (char *)req_ssid.ssid, bss->bssid);
+ "info: trying to associate to '%.*s' bssid %pM\n",
+ req_ssid.ssid_len, (char *)req_ssid.ssid,
+ bss->bssid);
memcpy(&priv->cfg_bssid, bss->bssid, ETH_ALEN);
break;
}
@@ -2202,8 +2203,8 @@ mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
}
mwifiex_dbg(adapter, INFO,
- "info: Trying to associate to %s and bssid %pM\n",
- (char *)sme->ssid, sme->bssid);
+ "info: Trying to associate to %.*s and bssid %pM\n",
+ (int)sme->ssid_len, (char *)sme->ssid, sme->bssid);
ret = mwifiex_cfg80211_assoc(priv, sme->ssid_len, sme->ssid, sme->bssid,
priv->bss_mode, sme->channel, sme, 0);
@@ -2333,8 +2334,8 @@ mwifiex_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
}
mwifiex_dbg(priv->adapter, MSG,
- "info: trying to join to %s and bssid %pM\n",
- (char *)params->ssid, params->bssid);
+ "info: trying to join to %.*s and bssid %pM\n",
+ params->ssid_len, (char *)params->ssid, params->bssid);
mwifiex_set_ibss_params(priv, params);