tree 3a4a59d732bbf4e7d34fc90af03b2c66462f34bb
parent 796e1112176ada7ebc084491458dfbfbe3a193b6
author Benjamin Beichler <benjamin.beichler@uni-rostock.de> 1520442667 +0100
committer Johannes Berg <johannes.berg@intel.com> 1521626253 +0100

mac80211_hwsim: fix use-after-free bug in hwsim_exit_net

When destroying a net namespace, all hwsim interfaces, which are not
created in default namespace are deleted. But the async deletion of the
interfaces could last longer than the actual destruction of the
namespace, which results to an use after free bug. Therefore use
synchronous deletion in this case.

Fixes: 100cb9ff40e0 ("mac80211_hwsim: Allow managing radios from non-initial namespaces")
Reported-by: syzbot+70ce058e01259de7bb1d@syzkaller.appspotmail.com
Signed-off-by: Benjamin Beichler <benjamin.beichler@uni-rostock.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>