Author: avos
Date: Thu Jan  7 18:41:03 2016
New Revision: 293339
URL: https://svnweb.freebsd.org/changeset/base/293339

Log:
  net80211 drivers: fix ieee80211_init_channels() usage
  
  Fix out-of-bounds read (all) / write (11n capable) for drivers
  that are using ieee80211_init_channels() to initialize channel list.
  
  Tested with:
   * RTL8188EU, STA mode.
   * RTL8188CUS, STA mode.
   * WUSB54GC, HOSTAP mode.
  
  Approved by:  adrian (mentor)
  MFC after:    2 weeks
  Differential Revision:        https://reviews.freebsd.org/D4818

Modified:
  head/sys/dev/bwi/if_bwi.c
  head/sys/dev/if_ndis/if_ndis.c
  head/sys/dev/iwi/if_iwi.c
  head/sys/dev/malo/if_malo.c
  head/sys/dev/otus/if_otus.c
  head/sys/dev/ral/rt2560.c
  head/sys/dev/ral/rt2661.c
  head/sys/dev/ral/rt2860.c
  head/sys/dev/rtwn/if_rtwn.c
  head/sys/dev/usb/wlan/if_rsu.c
  head/sys/dev/usb/wlan/if_rum.c
  head/sys/dev/usb/wlan/if_run.c
  head/sys/dev/usb/wlan/if_uath.c
  head/sys/dev/usb/wlan/if_upgt.c
  head/sys/dev/usb/wlan/if_ural.c
  head/sys/dev/usb/wlan/if_urtw.c
  head/sys/dev/usb/wlan/if_urtwn.c
  head/sys/dev/usb/wlan/if_zyd.c

Modified: head/sys/dev/bwi/if_bwi.c
==============================================================================
--- head/sys/dev/bwi/if_bwi.c   Thu Jan  7 18:34:56 2016        (r293338)
+++ head/sys/dev/bwi/if_bwi.c   Thu Jan  7 18:41:03 2016        (r293339)
@@ -356,8 +356,8 @@ bwi_attach(struct bwi_softc *sc)
        device_t dev = sc->sc_dev;
        struct bwi_mac *mac;
        struct bwi_phy *phy;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
        int i, error;
-       uint8_t bands;
 
        BWI_LOCK_INIT(sc);
 
@@ -453,15 +453,15 @@ bwi_attach(struct bwi_softc *sc)
        /*
         * Setup ratesets, phytype, channels and get MAC address
         */
-       bands = 0;
+       memset(bands, 0, sizeof(bands));
        if (phy->phy_mode == IEEE80211_MODE_11B ||
            phy->phy_mode == IEEE80211_MODE_11G) {
-               setbit(&bands, IEEE80211_MODE_11B);
+               setbit(bands, IEEE80211_MODE_11B);
                if (phy->phy_mode == IEEE80211_MODE_11B) {
                        ic->ic_phytype = IEEE80211_T_DS;
                } else {
                        ic->ic_phytype = IEEE80211_T_OFDM;
-                       setbit(&bands, IEEE80211_MODE_11G);
+                       setbit(bands, IEEE80211_MODE_11G);
                }
 
                bwi_get_eaddr(sc, BWI_SPROM_11BG_EADDR, ic->ic_macaddr);
@@ -475,7 +475,7 @@ bwi_attach(struct bwi_softc *sc)
                }
        } else if (phy->phy_mode == IEEE80211_MODE_11A) {
                /* TODO:11A */
-               setbit(&bands, IEEE80211_MODE_11A);
+               setbit(bands, IEEE80211_MODE_11A);
                error = ENXIO;
                goto fail;
        } else {
@@ -487,7 +487,7 @@ bwi_attach(struct bwi_softc *sc)
                                   BWI_SPROM_CARD_INFO_LOCALE);
        DPRINTF(sc, BWI_DBG_ATTACH, "locale: %d\n", sc->sc_locale);
        /* XXX use locale */
-       ieee80211_init_channels(ic, NULL, &bands);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ic->ic_softc = sc;
        ic->ic_name = device_get_nameunit(dev);

Modified: head/sys/dev/if_ndis/if_ndis.c
==============================================================================
--- head/sys/dev/if_ndis/if_ndis.c      Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/if_ndis/if_ndis.c      Thu Jan  7 18:41:03 2016        
(r293339)
@@ -724,8 +724,8 @@ ndis_80211attach(struct ndis_softc *sc)
        ndis_80211_rates_ex     rates;
        struct ndis_80211_nettype_list *ntl;
        uint32_t                arg;
-       int                     mode, i, r, len;
-       uint8_t                 bands = 0;
+       int                     mode, i, r, len, nonettypes = 1;
+       uint8_t                 bands[howmany(IEEE80211_MODE_MAX, 8)] = { 0 };
 
        callout_init(&sc->ndis_scan_callout, 1);
 
@@ -751,8 +751,9 @@ ndis_80211attach(struct ndis_softc *sc)
        for (i = 0; i < ntl->ntl_items; i++) {
                mode = ndis_nettype_mode(ntl->ntl_type[i]);
                if (mode) {
+                       nonettypes = 0;
                        setbit(ic->ic_modecaps, mode);
-                       setbit(&bands, mode);
+                       setbit(bands, mode);
                } else
                        device_printf(sc->ndis_dev, "Unknown nettype %d\n",
                            ntl->ntl_type[i]);
@@ -760,9 +761,9 @@ ndis_80211attach(struct ndis_softc *sc)
        free(ntl, M_DEVBUF);
 nonettypes:
        /* Default to 11b channels if the card did not supply any */
-       if (bands == 0) {
+       if (nonettypes) {
                setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
-               setbit(&bands, IEEE80211_MODE_11B);
+               setbit(bands, IEEE80211_MODE_11B);
        }
        len = sizeof(rates);
        bzero((char *)&rates, len);
@@ -859,7 +860,7 @@ nonettypes:
 #undef INCRATE
 #undef TESTSETRATE
 
-       ieee80211_init_channels(ic, NULL, &bands);
+       ieee80211_init_channels(ic, NULL, bands);
 
        /*
         * To test for WPA support, we need to see if we can

Modified: head/sys/dev/iwi/if_iwi.c
==============================================================================
--- head/sys/dev/iwi/if_iwi.c   Thu Jan  7 18:34:56 2016        (r293338)
+++ head/sys/dev/iwi/if_iwi.c   Thu Jan  7 18:41:03 2016        (r293339)
@@ -271,8 +271,8 @@ iwi_attach(device_t dev)
        struct iwi_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;
        uint16_t val;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
        int i, error;
-       uint8_t bands;
 
        sc->sc_dev = dev;
 
@@ -373,13 +373,13 @@ iwi_attach(device_t dev)
        val = iwi_read_prom_word(sc, IWI_EEPROM_MAC + 2);
        ic->ic_macaddr[4] = val & 0xff;
        ic->ic_macaddr[5] = val >> 8;
-       
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
+
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
        if (pci_get_device(dev) >= 0x4223) 
-               setbit(&bands, IEEE80211_MODE_11A);
-       ieee80211_init_channels(ic, NULL, &bands);
+               setbit(bands, IEEE80211_MODE_11A);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        /* override default methods */

Modified: head/sys/dev/malo/if_malo.c
==============================================================================
--- head/sys/dev/malo/if_malo.c Thu Jan  7 18:34:56 2016        (r293338)
+++ head/sys/dev/malo/if_malo.c Thu Jan  7 18:41:03 2016        (r293339)
@@ -173,7 +173,7 @@ malo_attach(uint16_t devid, struct malo_
        struct ieee80211com *ic = &sc->malo_ic;
        struct malo_hal *mh;
        int error;
-       uint8_t bands;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
 
        MALO_LOCK_INIT(sc);
        callout_init_mtx(&sc->malo_watchdog_timer, &sc->malo_mtx, 0);
@@ -222,10 +222,10 @@ malo_attach(uint16_t devid, struct malo_
            sc->malo_hwspecs.wcbbase[2], sc->malo_hwspecs.wcbbase[3]);
 
        /* NB: firmware looks that it does not export regdomain info API.  */
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
-       ieee80211_init_channels(ic, NULL, &bands);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
+       ieee80211_init_channels(ic, NULL, bands);
 
        sc->malo_txantenna = 0x2;       /* h/w default */
        sc->malo_rxantenna = 0xffff;    /* h/w default */

Modified: head/sys/dev/otus/if_otus.c
==============================================================================
--- head/sys/dev/otus/if_otus.c Thu Jan  7 18:34:56 2016        (r293338)
+++ head/sys/dev/otus/if_otus.c Thu Jan  7 18:41:03 2016        (r293339)
@@ -624,8 +624,8 @@ otus_attachhook(struct otus_softc *sc)
        struct ieee80211com *ic = &sc->sc_ic;
        usb_device_request_t req;
        uint32_t in, out;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
        int error;
-       uint8_t bands;
 
        /* Not locked */
        error = otus_load_firmware(sc, "otusfw_init", AR_FW_INIT_ADDR);
@@ -743,19 +743,19 @@ otus_attachhook(struct otus_softc *sc)
        otus_get_chanlist(sc);
 #else
        /* Set supported .11b and .11g rates. */
-       bands = 0;
+       memset(bands, 0, sizeof(bands));
        if (sc->eeprom.baseEepHeader.opCapFlags & AR5416_OPFLAGS_11G) {
-               setbit(&bands, IEEE80211_MODE_11B);
-               setbit(&bands, IEEE80211_MODE_11G);
+               setbit(bands, IEEE80211_MODE_11B);
+               setbit(bands, IEEE80211_MODE_11G);
        }
        if (sc->eeprom.baseEepHeader.opCapFlags & AR5416_OPFLAGS_11A) {
-               setbit(&bands, IEEE80211_MODE_11A);
+               setbit(bands, IEEE80211_MODE_11A);
        }
 #if 0
        if (sc->sc_ht)
-               setbit(&bands, IEEE80211_MODE_11NG);
+               setbit(bands, IEEE80211_MODE_11NG);
 #endif
-       ieee80211_init_channels(ic, NULL, &bands);
+       ieee80211_init_channels(ic, NULL, bands);
 #endif
 
        ieee80211_ifattach(ic);

Modified: head/sys/dev/ral/rt2560.c
==============================================================================
--- head/sys/dev/ral/rt2560.c   Thu Jan  7 18:34:56 2016        (r293338)
+++ head/sys/dev/ral/rt2560.c   Thu Jan  7 18:41:03 2016        (r293339)
@@ -199,7 +199,7 @@ rt2560_attach(device_t dev, int id)
 {
        struct rt2560_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;
-       uint8_t bands;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
        int error;
 
        sc->sc_dev = dev;
@@ -278,12 +278,12 @@ rt2560_attach(device_t dev, int id)
 #endif
                ;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
        if (sc->rf_rev == RT2560_RF_5222)
-               setbit(&bands, IEEE80211_MODE_11A);
-       ieee80211_init_channels(ic, NULL, &bands);
+               setbit(bands, IEEE80211_MODE_11A);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        ic->ic_raw_xmit = rt2560_raw_xmit;

Modified: head/sys/dev/ral/rt2661.c
==============================================================================
--- head/sys/dev/ral/rt2661.c   Thu Jan  7 18:34:56 2016        (r293338)
+++ head/sys/dev/ral/rt2661.c   Thu Jan  7 18:41:03 2016        (r293339)
@@ -199,8 +199,8 @@ rt2661_attach(device_t dev, int id)
        struct rt2661_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t val;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
        int error, ac, ntries;
-       uint8_t bands;
 
        sc->sc_id = id;
        sc->sc_dev = dev;
@@ -279,12 +279,12 @@ rt2661_attach(device_t dev, int id)
 #endif
                ;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
        if (sc->rf_rev == RT2661_RF_5225 || sc->rf_rev == RT2661_RF_5325) 
-               setbit(&bands, IEEE80211_MODE_11A);
-       ieee80211_init_channels(ic, NULL, &bands);
+               setbit(bands, IEEE80211_MODE_11A);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
 #if 0

Modified: head/sys/dev/ral/rt2860.c
==============================================================================
--- head/sys/dev/ral/rt2860.c   Thu Jan  7 18:34:56 2016        (r293338)
+++ head/sys/dev/ral/rt2860.c   Thu Jan  7 18:41:03 2016        (r293339)
@@ -232,8 +232,8 @@ rt2860_attach(device_t dev, int id)
        struct rt2860_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t tmp;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
        int error, ntries, qid;
-       uint8_t bands;
 
        sc->sc_dev = dev;
        sc->sc_debug = 0;
@@ -319,12 +319,12 @@ rt2860_attach(device_t dev, int id)
                | IEEE80211_C_WME               /* 802.11e */
                ;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
        if (sc->rf_rev == RT2860_RF_2750 || sc->rf_rev == RT2860_RF_2850)
-               setbit(&bands, IEEE80211_MODE_11A);
-       ieee80211_init_channels(ic, NULL, &bands);
+               setbit(bands, IEEE80211_MODE_11A);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
 

Modified: head/sys/dev/rtwn/if_rtwn.c
==============================================================================
--- head/sys/dev/rtwn/if_rtwn.c Thu Jan  7 18:34:56 2016        (r293338)
+++ head/sys/dev/rtwn/if_rtwn.c Thu Jan  7 18:41:03 2016        (r293339)
@@ -251,7 +251,7 @@ rtwn_attach(device_t dev)
        struct rtwn_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t lcsr;
-       uint8_t bands;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
        int i, count, error, rid;
 
        sc->sc_dev = dev;
@@ -353,10 +353,10 @@ rtwn_attach(device_t dev)
                | IEEE80211_C_WME               /* 802.11e */
                ;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
-       ieee80211_init_channels(ic, NULL, &bands);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
 

Modified: head/sys/dev/usb/wlan/if_rsu.c
==============================================================================
--- head/sys/dev/usb/wlan/if_rsu.c      Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/usb/wlan/if_rsu.c      Thu Jan  7 18:41:03 2016        
(r293339)
@@ -403,7 +403,8 @@ rsu_attach(device_t self)
        struct rsu_softc *sc = device_get_softc(self);
        struct ieee80211com *ic = &sc->sc_ic;
        int error;
-       uint8_t iface_index, bands;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
+       uint8_t iface_index;
        struct usb_interface *iface;
        const char *rft;
 
@@ -531,12 +532,12 @@ rsu_attach(device_t self)
        }
 
        /* Set supported .11b and .11g rates. */
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
        if (sc->sc_ht)
-               setbit(&bands, IEEE80211_MODE_11NG);
-       ieee80211_init_channels(ic, NULL, &bands);
+               setbit(bands, IEEE80211_MODE_11NG);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        ic->ic_raw_xmit = rsu_raw_xmit;

Modified: head/sys/dev/usb/wlan/if_rum.c
==============================================================================
--- head/sys/dev/usb/wlan/if_rum.c      Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/usb/wlan/if_rum.c      Thu Jan  7 18:41:03 2016        
(r293339)
@@ -468,8 +468,9 @@ rum_attach(device_t self)
        struct usb_attach_arg *uaa = device_get_ivars(self);
        struct rum_softc *sc = device_get_softc(self);
        struct ieee80211com *ic = &sc->sc_ic;
-       uint8_t iface_index, bands;
        uint32_t tmp;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
+       uint8_t iface_index;
        int error, ntries;
 
        device_set_usb_desc(self);
@@ -537,12 +538,12 @@ rum_attach(device_t self)
            IEEE80211_CRYPTO_TKIPMIC |
            IEEE80211_CRYPTO_TKIP;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
        if (sc->rf_rev == RT2573_RF_5225 || sc->rf_rev == RT2573_RF_5226)
-               setbit(&bands, IEEE80211_MODE_11A);
-       ieee80211_init_channels(ic, NULL, &bands);
+               setbit(bands, IEEE80211_MODE_11A);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        ic->ic_update_promisc = rum_update_promisc;

Modified: head/sys/dev/usb/wlan/if_run.c
==============================================================================
--- head/sys/dev/usb/wlan/if_run.c      Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/usb/wlan/if_run.c      Thu Jan  7 18:41:03 2016        
(r293339)
@@ -704,8 +704,9 @@ run_attach(device_t self)
        struct usb_attach_arg *uaa = device_get_ivars(self);
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t ver;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
+       uint8_t iface_index;
        int ntries, error;
-       uint8_t iface_index, bands;
 
        device_set_usb_desc(self);
        sc->sc_udev = uaa->device;
@@ -785,14 +786,14 @@ run_attach(device_t self)
        ic->ic_flags |= IEEE80211_F_DATAPAD;
        ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
        if (sc->rf_rev == RT2860_RF_2750 || sc->rf_rev == RT2860_RF_2850 ||
            sc->rf_rev == RT3070_RF_3052 || sc->rf_rev == RT3593_RF_3053 ||
            sc->rf_rev == RT5592_RF_5592)
-               setbit(&bands, IEEE80211_MODE_11A);
-       ieee80211_init_channels(ic, NULL, &bands);
+               setbit(bands, IEEE80211_MODE_11A);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
 

Modified: head/sys/dev/usb/wlan/if_uath.c
==============================================================================
--- head/sys/dev/usb/wlan/if_uath.c     Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/usb/wlan/if_uath.c     Thu Jan  7 18:41:03 2016        
(r293339)
@@ -328,7 +328,8 @@ uath_attach(device_t dev)
        struct uath_softc *sc = device_get_softc(dev);
        struct usb_attach_arg *uaa = device_get_ivars(dev);
        struct ieee80211com *ic = &sc->sc_ic;
-       uint8_t bands, iface_index = UATH_IFACE_INDEX;          /* XXX */
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
+       uint8_t iface_index = UATH_IFACE_INDEX;         /* XXX */
        usb_error_t error;
 
        sc->sc_dev = dev;
@@ -431,13 +432,13 @@ uath_attach(device_t dev)
        /* put a regulatory domain to reveal informations.  */
        uath_regdomain = sc->sc_devcap.regDomain;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
        if ((sc->sc_devcap.analog5GhzRevision & 0xf0) == 0x30)
-               setbit(&bands, IEEE80211_MODE_11A);
+               setbit(bands, IEEE80211_MODE_11A);
        /* XXX turbo */
-       ieee80211_init_channels(ic, NULL, &bands);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        ic->ic_raw_xmit = uath_raw_xmit;

Modified: head/sys/dev/usb/wlan/if_upgt.c
==============================================================================
--- head/sys/dev/usb/wlan/if_upgt.c     Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/usb/wlan/if_upgt.c     Thu Jan  7 18:41:03 2016        
(r293339)
@@ -243,7 +243,8 @@ upgt_attach(device_t dev)
        struct upgt_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;
        struct usb_attach_arg *uaa = device_get_ivars(dev);
-       uint8_t bands, iface_index = UPGT_IFACE_INDEX;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
+       uint8_t iface_index = UPGT_IFACE_INDEX;
        int error;
 
        sc->sc_dev = dev;
@@ -337,10 +338,10 @@ upgt_attach(device_t dev)
                | IEEE80211_C_WPA               /* 802.11i */
                ;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
-       ieee80211_init_channels(ic, NULL, &bands);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        ic->ic_raw_xmit = upgt_raw_xmit;

Modified: head/sys/dev/usb/wlan/if_ural.c
==============================================================================
--- head/sys/dev/usb/wlan/if_ural.c     Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/usb/wlan/if_ural.c     Thu Jan  7 18:41:03 2016        
(r293339)
@@ -424,7 +424,8 @@ ural_attach(device_t self)
        struct usb_attach_arg *uaa = device_get_ivars(self);
        struct ural_softc *sc = device_get_softc(self);
        struct ieee80211com *ic = &sc->sc_ic;
-       uint8_t iface_index, bands;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
+       uint8_t iface_index;
        int error;
 
        device_set_usb_desc(self);
@@ -473,12 +474,12 @@ ural_attach(device_t self)
            | IEEE80211_C_WPA           /* 802.11i */
            ;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
        if (sc->rf_rev == RAL_RF_5222)
-               setbit(&bands, IEEE80211_MODE_11A);
-       ieee80211_init_channels(ic, NULL, &bands);
+               setbit(bands, IEEE80211_MODE_11A);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        ic->ic_update_promisc = ural_update_promisc;

Modified: head/sys/dev/usb/wlan/if_urtw.c
==============================================================================
--- head/sys/dev/usb/wlan/if_urtw.c     Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/usb/wlan/if_urtw.c     Thu Jan  7 18:41:03 2016        
(r293339)
@@ -785,7 +785,8 @@ urtw_attach(device_t dev)
        struct urtw_softc *sc = device_get_softc(dev);
        struct usb_attach_arg *uaa = device_get_ivars(dev);
        struct ieee80211com *ic = &sc->sc_ic;
-       uint8_t bands, iface_index = URTW_IFACE_INDEX;          /* XXX */
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
+       uint8_t iface_index = URTW_IFACE_INDEX;         /* XXX */
        uint16_t n_setup;
        uint32_t data;
        usb_error_t error;
@@ -876,10 +877,10 @@ urtw_attach(device_t dev)
            IEEE80211_C_BGSCAN |        /* capable of bg scanning */
            IEEE80211_C_WPA;            /* 802.11i */
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
-       ieee80211_init_channels(ic, NULL, &bands);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        ic->ic_raw_xmit = urtw_raw_xmit;

Modified: head/sys/dev/usb/wlan/if_urtwn.c
==============================================================================
--- head/sys/dev/usb/wlan/if_urtwn.c    Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/usb/wlan/if_urtwn.c    Thu Jan  7 18:41:03 2016        
(r293339)
@@ -439,7 +439,7 @@ urtwn_attach(device_t self)
        struct usb_attach_arg *uaa = device_get_ivars(self);
        struct urtwn_softc *sc = device_get_softc(self);
        struct ieee80211com *ic = &sc->sc_ic;
-       uint8_t bands;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
        int error;
 
        device_set_usb_desc(self);
@@ -525,10 +525,10 @@ urtwn_attach(device_t self)
            IEEE80211_CRYPTO_TKIP |
            IEEE80211_CRYPTO_AES_CCM;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
-       ieee80211_init_channels(ic, NULL, &bands);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        ic->ic_raw_xmit = urtwn_raw_xmit;

Modified: head/sys/dev/usb/wlan/if_zyd.c
==============================================================================
--- head/sys/dev/usb/wlan/if_zyd.c      Thu Jan  7 18:34:56 2016        
(r293338)
+++ head/sys/dev/usb/wlan/if_zyd.c      Thu Jan  7 18:41:03 2016        
(r293339)
@@ -334,7 +334,8 @@ zyd_attach(device_t dev)
        struct usb_attach_arg *uaa = device_get_ivars(dev);
        struct zyd_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;
-       uint8_t iface_index, bands;
+       uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];
+       uint8_t iface_index;
        int error;
 
        if (uaa->info.bcdDevice < 0x4330) {
@@ -387,10 +388,10 @@ zyd_attach(device_t dev)
                | IEEE80211_C_WPA               /* 802.11i */
                ;
 
-       bands = 0;
-       setbit(&bands, IEEE80211_MODE_11B);
-       setbit(&bands, IEEE80211_MODE_11G);
-       ieee80211_init_channels(ic, NULL, &bands);
+       memset(bands, 0, sizeof(bands));
+       setbit(bands, IEEE80211_MODE_11B);
+       setbit(bands, IEEE80211_MODE_11G);
+       ieee80211_init_channels(ic, NULL, bands);
 
        ieee80211_ifattach(ic);
        ic->ic_raw_xmit = zyd_raw_xmit;
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