cfg80211: Fix validation of AKM suites
authorJouni Malinen <jouni@qca.qualcomm.com>
Wed, 21 Sep 2011 13:13:07 +0000 (16:13 +0300)
committerJohn W. Linville <linville@tuxdriver.com>
Wed, 21 Sep 2011 19:58:24 +0000 (15:58 -0400)
commit1b9ca0272ffae212e726380f66777b30a56ed7a5
treedd91eefd0ee5fe21ba06816a4a25cc2303603744
parent65d0f19e583e80e42b1c67c166bfc4dfdf6ab693
cfg80211: Fix validation of AKM suites

Incorrect variable was used in validating the akm_suites array from
NL80211_ATTR_AKM_SUITES. In addition, there was no explicit
validation of the array length (we only have room for
NL80211_MAX_NR_AKM_SUITES).

This can result in a buffer write overflow for stack variables with
arbitrary data from user space. The nl80211 commands using the affected
functionality require GENL_ADMIN_PERM, so this is only exposed to admin
users.

Cc: stable@kernel.org
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
net/wireless/nl80211.c