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| author | Dmitry Ivanov <dmitrijs.ivanovs@ubnt.com> | 2016-04-06 17:23:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-04 14:48:45 -0700 |
| commit | 56b8eaa38b04f147a6b825a73a31b826b6051604 (patch) | |
| tree | aa97848d92c7aaedd6d303f9f88d240e64de5570 /net/mac802154/rx.c | |
| parent | c89c3225062d64c63532c127c374ea962f336e6b (diff) | |
nl80211: check netlink protocol in socket release notification
commit 8f815cdde3e550e10c2736990d791f60c2ce43eb upstream.
A non-privileged user can create a netlink socket with the same port_id as
used by an existing open nl80211 netlink socket (e.g. as used by a hostapd
process) with a different protocol number.
Closing this socket will then lead to the notification going to nl80211's
socket release notification handler, and possibly cause an action such as
removing a virtual interface.
Fix this issue by checking that the netlink protocol is NETLINK_GENERIC.
Since generic netlink has no notifier chain of its own, we can't fix the
problem more generically.
Fixes: 026331c4d9b5 ("cfg80211/mac80211: allow registering for and sending action frames")
Signed-off-by: Dmitry Ivanov <dima@ubnt.com>
[rewrite commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/mac802154/rx.c')
0 files changed, 0 insertions, 0 deletions