The patch below does not apply to the 3.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 79845c662eeb95c9a180b9bd0d3ad848ee65b94c Mon Sep 17 00:00:00 2001 From: Johannes Berg <[email protected]> Date: Mon, 21 Oct 2013 11:33:35 +0200 Subject: [PATCH] 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: [email protected] [3.8+] Reviewed-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]> 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) { -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
