diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2017-01-05 10:57:14 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2017-01-05 10:59:53 +0100 |
| commit | 753aacfd2e95df6a0caf23c03dc309020765bea9 (patch) | |
| tree | d1f35e254b4cf620ceb0e3833ee19bcdb5aba36c | |
| parent | 35f432a03e41d3bf08c51ede917f94e2288fbe8c (diff) | |
| download | linux-753aacfd2e95df6a0caf23c03dc309020765bea9.tar.gz linux-753aacfd2e95df6a0caf23c03dc309020765bea9.tar.bz2 linux-753aacfd2e95df6a0caf23c03dc309020765bea9.zip | |
nl80211: fix sched scan netlink socket owner destruction
A single netlink socket might own multiple interfaces *and* a
scheduled scan request (which might belong to another interface),
so when it goes away both may need to be destroyed.
Remove the schedule_scan_stop indirection to fix this - it's only
needed for interface destruction because of the way this works
right now, with a single work taking care of all interfaces.
Cc: stable@vger.kernel.org
Fixes: 93a1e86ce10e4 ("nl80211: Stop scheduled scan if netlink client disappears")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | net/wireless/nl80211.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 3df85a751a85..ef5eff93a8b8 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -14502,13 +14502,17 @@ static int nl80211_netlink_notify(struct notifier_block * nb, list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) { bool schedule_destroy_work = false; - bool schedule_scan_stop = false; struct cfg80211_sched_scan_request *sched_scan_req = rcu_dereference(rdev->sched_scan_req); if (sched_scan_req && notify->portid && - sched_scan_req->owner_nlportid == notify->portid) - schedule_scan_stop = true; + sched_scan_req->owner_nlportid == notify->portid) { + sched_scan_req->owner_nlportid = 0; + + if (rdev->ops->sched_scan_stop && + rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) + schedule_work(&rdev->sched_scan_stop_wk); + } list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) { cfg80211_mlme_unregister_socket(wdev, notify->portid); @@ -14539,12 +14543,6 @@ static int nl80211_netlink_notify(struct notifier_block * nb, spin_unlock(&rdev->destroy_list_lock); schedule_work(&rdev->destroy_work); } - } else if (schedule_scan_stop) { - sched_scan_req->owner_nlportid = 0; - - if (rdev->ops->sched_scan_stop && - rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) - schedule_work(&rdev->sched_scan_stop_wk); } } |