This is a note to let you know that I've just added the patch titled
cfg80211: fix scheduled scan pointer access
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cfg80211-fix-scheduled-scan-pointer-access.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 79845c662eeb95c9a180b9bd0d3ad848ee65b94c Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@xxxxxxxxx>
Date: Mon, 21 Oct 2013 11:33:35 +0200
Subject: cfg80211: fix scheduled scan pointer access
From: Johannes Berg <johannes.berg@xxxxxxxxx>
commit 79845c662eeb95c9a180b9bd0d3ad848ee65b94c upstream.
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.
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/wireless/scan.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -253,10 +253,10 @@ void __cfg80211_sched_scan_results(struc
rdev = container_of(wk, struct cfg80211_registered_device,
sched_scan_results_wk);
- request = rdev->sched_scan_req;
-
mutex_lock(&rdev->sched_scan_mtx);
+ 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) {
Patches currently in stable-queue which might be from johannes.berg@xxxxxxxxx are
queue-3.10/cfg80211-fix-scheduled-scan-pointer-access.patch
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