From 869aaab1812c4212e65fb181e94b824cf49f9509 Mon Sep 17 00:00:00 2001 From: Michael Buesch Date: Fri, 5 May 2006 17:23:51 +0200 Subject: [PATCH] [PATCH] bcm43xx: Fix array overrun in bcm43xx_geo_init The problem here is that the bcm34xx driver and the ieee80211 stack do not agree on what channels are possible for 802.11a. The ieee80211 stack only wants channels between 34 and 165, while the bcm43xx driver accepts anything from 0 to 200. I made the bcm43xx driver comply with the ieee80211 stack expectations, by using the proper constants. Signed-off-by: Jean Delvare [mb]: Reduce stack usage by kzalloc-ing ieee80211_geo Signed-off-by: Michael Buesch Signed-off-by: John W. Linville --- drivers/net/wireless/bcm43xx/bcm43xx_main.c | 43 +++++++++++++++++------------ drivers/net/wireless/bcm43xx/bcm43xx_main.h | 6 ++-- 2 files changed, 30 insertions(+), 19 deletions(-) diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.c b/drivers/net/wireless/bcm43xx/bcm43xx_main.c index 4be2d9b..e2982a8 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_main.c +++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.c @@ -939,9 +939,9 @@ static int bcm43xx_sprom_extract(struct bcm43xx_private *bcm) return 0; } -static void bcm43xx_geo_init(struct bcm43xx_private *bcm) +static int bcm43xx_geo_init(struct bcm43xx_private *bcm) { - struct ieee80211_geo geo; + struct ieee80211_geo *geo; struct ieee80211_channel *chan; int have_a = 0, have_bg = 0; int i; @@ -949,7 +949,10 @@ static void bcm43xx_geo_init(struct bcm43xx_private *bcm) struct bcm43xx_phyinfo *phy; const char *iso_country; - memset(&geo, 0, sizeof(geo)); + geo = kzalloc(sizeof(*geo), GFP_KERNEL); + if (!geo) + return -ENOMEM; + for (i = 0; i < bcm->nr_80211_available; i++) { phy = &(bcm->core_80211_ext[i].phy); switch (phy->type) { @@ -967,31 +970,36 @@ static void bcm43xx_geo_init(struct bcm43xx_private *bcm) iso_country = bcm43xx_locale_iso(bcm->sprom.locale); if (have_a) { - for (i = 0, channel = 0; channel < 201; channel++) { - chan = &geo.a[i++]; + for (i = 0, channel = IEEE80211_52GHZ_MIN_CHANNEL; + channel <= IEEE80211_52GHZ_MAX_CHANNEL; channel++) { + chan = &geo->a[i++]; chan->freq = bcm43xx_channel_to_freq_a(channel); chan->channel = channel; } - geo.a_channels = i; + geo->a_channels = i; } if (have_bg) { - for (i = 0, channel = 1; channel < 15; channel++) { - chan = &geo.bg[i++]; + for (i = 0, channel = IEEE80211_24GHZ_MIN_CHANNEL; + channel <= IEEE80211_24GHZ_MAX_CHANNEL; channel++) { + chan = &geo->bg[i++]; chan->freq = bcm43xx_channel_to_freq_bg(channel); chan->channel = channel; } - geo.bg_channels = i; + geo->bg_channels = i; } - memcpy(geo.name, iso_country, 2); + memcpy(geo->name, iso_country, 2); if (0 /*TODO: Outdoor use only */) - geo.name[2] = 'O'; + geo->name[2] = 'O'; else if (0 /*TODO: Indoor use only */) - geo.name[2] = 'I'; + geo->name[2] = 'I'; else - geo.name[2] = ' '; - geo.name[3] = '\0'; + geo->name[2] = ' '; + geo->name[3] = '\0'; + + ieee80211_set_geo(bcm->ieee, geo); + kfree(geo); - ieee80211_set_geo(bcm->ieee, &geo); + return 0; } /* DummyTransmission function, as documented on @@ -3479,6 +3487,9 @@ static int bcm43xx_attach_board(struct bcm43xx_private *bcm) goto err_80211_unwind; bcm43xx_wireless_core_disable(bcm); } + err = bcm43xx_geo_init(bcm); + if (err) + goto err_80211_unwind; bcm43xx_pctl_set_crystal(bcm, 0); /* Set the MAC address in the networking subsystem */ @@ -3487,8 +3498,6 @@ static int bcm43xx_attach_board(struct bcm43xx_private *bcm) else memcpy(bcm->net_dev->dev_addr, bcm->sprom.il0macaddr, 6); - bcm43xx_geo_init(bcm); - snprintf(bcm->nick, IW_ESSID_MAX_SIZE, "Broadcom %04X", bcm->chip_id); diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.h b/drivers/net/wireless/bcm43xx/bcm43xx_main.h index eca79a3..30a202b 100644 --- a/drivers/net/wireless/bcm43xx/bcm43xx_main.h +++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.h @@ -118,12 +118,14 @@ int bcm43xx_channel_to_freq(struct bcm43xx_private *bcm, static inline int bcm43xx_is_valid_channel_a(u8 channel) { - return (channel <= 200); + return (channel >= IEEE80211_52GHZ_MIN_CHANNEL + && channel <= IEEE80211_52GHZ_MAX_CHANNEL); } static inline int bcm43xx_is_valid_channel_bg(u8 channel) { - return (channel >= 1 && channel <= 14); + return (channel >= IEEE80211_24GHZ_MIN_CHANNEL + && channel <= IEEE80211_24GHZ_MAX_CHANNEL); } static inline int bcm43xx_is_valid_channel(struct bcm43xx_private *bcm, -- 2.7.4