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author | Dmitry Ivanov <dmitrijs.ivanovs@ubnt.com> | 2016-04-06 17:23:18 +0300 |
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committer | Johannes Berg <johannes.berg@intel.com> | 2016-04-12 15:39:06 +0200 |
commit | 8f815cdde3e550e10c2736990d791f60c2ce43eb (patch) | |
tree | 73a1773500eb7bb14d10b0c30001af5be98baf22 /arch/sparc | |
parent | 30d237a6c2e9be1bb816fe8e787b88fd7aad833b (diff) | |
download | op-kernel-dev-8f815cdde3e550e10c2736990d791f60c2ce43eb.zip op-kernel-dev-8f815cdde3e550e10c2736990d791f60c2ce43eb.tar.gz |
nl80211: check netlink protocol in socket release notification
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")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Ivanov <dima@ubnt.com>
[rewrite commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'arch/sparc')
0 files changed, 0 insertions, 0 deletions