Commit 7c2844e3 authored by Brian Norris's avatar Brian Norris Committed by Jiri Slaby

mwifiex: printk() overflow with 32-byte SSIDs

commit fcd2042e 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: 5e6e3a92 ("wireless: mwifiex: initial commit for Marvell mwifiex driver")
Signed-off-by: default avatarBrian Norris <briannorris@chromium.org>
Acked-by: default avatarAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
parent 04b56f02
......@@ -1693,8 +1693,9 @@ mwifiex_cfg80211_assoc(struct mwifiex_private *priv, size_t ssid_len, u8 *ssid,
is_scanning_required = 1;
} else {
dev_dbg(priv->adapter->dev,
"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;
}
......@@ -1735,8 +1736,8 @@ mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
return -EINVAL;
}
wiphy_dbg(wiphy, "info: Trying to associate to %s and bssid %pM\n",
(char *) sme->ssid, sme->bssid);
wiphy_dbg(wiphy, "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);
......@@ -1859,8 +1860,8 @@ mwifiex_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
goto done;
}
wiphy_dbg(wiphy, "info: trying to join to %s and bssid %pM\n",
(char *) params->ssid, params->bssid);
wiphy_dbg(wiphy, "info: trying to join to %.*s and bssid %pM\n",
params->ssid_len, (char *)params->ssid, params->bssid);
mwifiex_set_ibss_params(priv, params);
......
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