mac80211: make debugfs files root-only
commitbebb8a5e2cd30adcc5e9a14c3366a231da728aee
authorJohannes Berg <johannes@sipsolutions.net>
Fri, 4 Apr 2008 21:33:37 +0000 (4 23:33 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Tue, 8 Apr 2008 20:44:43 +0000 (8 16:44 -0400)
treed4965ea266e0415ecea063aa7e54fd41aaa311fe
parenta82d992261f79506a0d55b9a179a211f96caf878
mac80211: make debugfs files root-only

Unfortunately, debugfs can be made to access invalid memory by
open()ing a file and then waiting until the corresponding debugfs
file has been removed (and, probably, the underlying object.)

That could be exploited by any user if the user is able to open
debugfs files and can cause networking devices, STA entries or
similar to disappear which is quite easy to do.

Hence, all debugfs files should be root-only.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
net/mac80211/debugfs.c
net/mac80211/debugfs_netdev.c
net/mac80211/debugfs_sta.c