Re: [PATCH 2/4] net: mac80211: scan.c: Fix RCU list related warnings.
flat view
From: Johannes Berg <johannes@sipsolutions.net>
Date: 2020-04-24 09:21:38
Also in:
linux-kernel-mentees, linux-wireless, lkml
On Thu, 2020-04-09 at 13:58 +0530, madhuparnabhowmik10@gmail.com wrote:
From: Madhuparna Bhowmik <redacted> This patch fixes the following warning: WARNING: suspicious RCU usage [ 84.530619] 5.6.0+ #4 Not tainted [ 84.530637] ----------------------------- [ 84.530658] net/mac80211/scan.c:454 RCU-list traversed in non-reader section!! As local->mtx is held in __ieee80211_scan_completed()
Yeah, but is that really the right lock? I think it should be RTNL or iflist_mtx for the interface list. (Not that this is necessarily a good idea - we perhaps should clean up and significantly reduce the number of locks used here.) johannes