From: Johannes Berg <johannes.berg@xxxxxxxxx>
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@xxxxxxxxxxxxxxx [3.8+]
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
net/wireless/scan.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index eeb7148..d4397eb 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) {
--
1.8.4.rc3
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
