tree 00fa538ef4be31be2b922add8809fb22a8864df8
parent f698b28afc3402c4020e6574e735f7d3857048ce
author Kirill Tkhai <ktkhai@virtuozzo.com> 1527852638 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1528899402 +0200

kcm: Fix use-after-free caused by clonned sockets

[ Upstream commit eb7f54b90bd8f469834c5e86dcf72ebf9a629811 ]

(resend for properly queueing in patchwork)

kcm_clone() creates kernel socket, which does not take net counter.
Thus, the net may die before the socket is completely destructed,
i.e. kcm_exit_net() is executed before kcm_done().

Reported-by: syzbot+5f1a04e374a635efc426@syzkaller.appspotmail.com
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>