diff options
| author |   Johannes Berg <johannes.berg@intel.com> | 2013-10-21 11:33:35 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-10-21 11:59:15 +0200 |
| commit | 79845c662eeb95c9a180b9bd0d3ad848ee65b94c (patch) | |
| tree | 191a0f1abdc8af9391159bd09c11fa981204aa12 /net/wireless/scan.c | |
| parent | mac80211: disable WMM with invalid parameters (diff) | |
| download | linux-dev-79845c662eeb95c9a180b9bd0d3ad848ee65b94c.tar.xz linux-dev-79845c662eeb95c9a180b9bd0d3ad848ee65b94c.zip | |
cfg80211: fix scheduled scan pointer access
Since rdev->sched_scan_req is dereferenced outside the
lock protecting it, this might be done at the wrong
time, causing crashes. Move the dereference to where
it should be - inside the RTNL locked section.
Cc: stable@vger.kernel.org [3.8+]
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/scan.c')
| -rw-r--r-- | net/wireless/scan.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c index eeb71480f1af..d4397eba5408 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -254,10 +254,10 @@ void __cfg80211_sched_scan_results(struct work_struct *wk) rdev = container_of(wk, struct cfg80211_registered_device, sched_scan_results_wk); - request = rdev->sched_scan_req; - rtnl_lock(); + request = rdev->sched_scan_req; + /* we don't have sched_scan_req anymore if the scan is stopping */ if (request) { if (request->flags & NL80211_SCAN_FLAG_FLUSH) { |