nl80211: fix check for valid SSID size in scan operations
commit946ea1c993016a55eacdf6a5bc4119889cbae41d
authorLuciano Coelho <coelho@ti.com>
Wed, 18 May 2011 21:43:38 +0000 (19 00:43 +0300)
committerGreg Kroah-Hartman <gregkh@suse.de>
Thu, 23 Jun 2011 22:24:06 +0000 (23 15:24 -0700)
tree849775e09771c5bf474a9a2e9573aa7a13af88e8
parent2d3b027dc8b636feb584ebc07556c26b0ae68977
nl80211: fix check for valid SSID size in scan operations

commit 208c72f4fe44fe09577e7975ba0e7fa0278f3d03 upstream.

In both trigger_scan and sched_scan operations, we were checking for
the SSID length before assigning the value correctly.  Since the
memory was just kzalloc'ed, the check was always failing and SSID with
over 32 characters were allowed to go through.

This was causing a buffer overflow when copying the actual SSID to the
proper place.

This bug has been there since 2.6.29-rc4.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
net/wireless/nl80211.c