diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2011-08-10 19:00:33 -0600 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-08-11 14:23:06 -0400 |
| commit | 040bdf713d2bec8235f1af705e2d13da5d9baec8 (patch) | |
| tree | 94bf0221a212b7e88ebaccfe9c4b76f4f210bd0f | |
| parent | 6a6767b046e2d336e2af06cb605106ed44a852b6 (diff) | |
| download | linux-040bdf713d2bec8235f1af705e2d13da5d9baec8.tar.bz2 | |
cfg80211: fix a crash in nl80211_send_station
mac80211 leaves sinfo->assoc_req_ies uninitialized, causing a random
pointer memory access in nl80211_send_station.
Instead of checking if the pointer is null, use sinfo->filled, like
the rest of the fields.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | include/net/cfg80211.h | 4 | ||||
| -rw-r--r-- | net/wireless/nl80211.c | 2 |
2 files changed, 4 insertions, 2 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 779e3008df4d..96876d366c6a 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -421,6 +421,7 @@ struct station_parameters { * @STATION_INFO_RX_BITRATE: @rxrate fields are filled * @STATION_INFO_BSS_PARAM: @bss_param filled * @STATION_INFO_CONNECTED_TIME: @connected_time filled + * @STATION_INFO_ASSOC_REQ_IES: @assoc_req_ies filled */ enum station_info_flags { STATION_INFO_INACTIVE_TIME = 1<<0, @@ -439,7 +440,8 @@ enum station_info_flags { STATION_INFO_SIGNAL_AVG = 1<<13, STATION_INFO_RX_BITRATE = 1<<14, STATION_INFO_BSS_PARAM = 1<<15, - STATION_INFO_CONNECTED_TIME = 1<<16 + STATION_INFO_CONNECTED_TIME = 1<<16, + STATION_INFO_ASSOC_REQ_IES = 1<<17 }; /** diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index ca7697701076..253e56319d7e 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2236,7 +2236,7 @@ static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq, } nla_nest_end(msg, sinfoattr); - if (sinfo->assoc_req_ies) + if (sinfo->filled & STATION_INFO_ASSOC_REQ_IES) NLA_PUT(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len, sinfo->assoc_req_ies); |