diff options
| author | Dan Aloni <dan@aloni.org> | 2009-06-24 22:34:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-07-12 13:21:45 -0700 |
| commit | 91fca6da389b897483b4c1edea29885172989fda (patch) | |
| tree | 750c7f198301660c028f09264f361f4edb16de3d | |
| parent | 02c8baecf5d8850dba40b47cdf003ed2e04e66dd (diff) | |
| download | linux-91fca6da389b897483b4c1edea29885172989fda.tar.bz2 | |
Staging: prevent rtl8192su from crashing dev_ioctl in SIOCGIWNAME
(adapted from the rtl8187se patch)
ieee80211_wx_get_name() ignores sizeof(wrqu->name) which is IFNAMSIZ (16), and
on certain conditions, the concatenated string will be larger than IFNAMSIZ
including the terminating zero.
length ("802.11" ++ "b" ++ "/g" ++ " linked" ++ "\x00") == 17
This fix uses strl{cpy,cat} in addition to the reduction of the total
possible length of the output string by a char.
It can be applied to 2.6.30-stable as well.
Signed-off-by: Dan Aloni <dan@aloni.org>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/staging/rtl8192su/ieee80211/ieee80211_softmac_wx.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/staging/rtl8192su/ieee80211/ieee80211_softmac_wx.c b/drivers/staging/rtl8192su/ieee80211/ieee80211_softmac_wx.c index 1f50c46dcb90..191dc3fbbe32 100644 --- a/drivers/staging/rtl8192su/ieee80211/ieee80211_softmac_wx.c +++ b/drivers/staging/rtl8192su/ieee80211/ieee80211_softmac_wx.c @@ -548,21 +548,21 @@ int ieee80211_wx_get_name(struct ieee80211_device *ieee, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { - strcpy(wrqu->name, "802.11"); + strlcpy(wrqu->name, "802.11", IFNAMSIZ); if(ieee->modulation & IEEE80211_CCK_MODULATION){ - strcat(wrqu->name, "b"); + strlcat(wrqu->name, "b", IFNAMSIZ); if(ieee->modulation & IEEE80211_OFDM_MODULATION) - strcat(wrqu->name, "/g"); + strlcat(wrqu->name, "/g", IFNAMSIZ); }else if(ieee->modulation & IEEE80211_OFDM_MODULATION) - strcat(wrqu->name, "g"); + strlcat(wrqu->name, "g", IFNAMSIZ); if (ieee->mode & (IEEE_N_24G | IEEE_N_5G)) - strcat(wrqu->name, "/n"); + strlcat(wrqu->name, "/n", IFNAMSIZ); if((ieee->state == IEEE80211_LINKED) || (ieee->state == IEEE80211_LINKED_SCANNING)) - strcat(wrqu->name," linked"); + strlcat(wrqu->name, " link", IFNAMSIZ); else if(ieee->state != IEEE80211_NOLINK) - strcat(wrqu->name," link.."); + strlcat(wrqu->name, " .....", IFNAMSIZ); return 0; |