On Fri, 2018-06-15 at 11:09 +0000, McGinn, Dan wrote: > Hi, I'm newly trying out Intel iwd daemon but I experience regular kernel errors in 4.17, although WPA2-PSK connection remains stable. These errors don't seem to be experienced with wpa_supplicant. The errors reliably appear around the following events: > netdev_unicast_notify() > netdev_control_port_frame_event() > netdev_set_rekey_offload() > netdev_set_gtk() > > @Denkenz in IRC helpfully suggests Johannes could follow the finger of suspicion to this commit: > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=911806491425d79107cadddbde11b42bbdfe38c8 It's his code ;-) Clearly this comes from cfg80211 without any locking other than rtnl, so you don't have preemption disabled. That's the minimum needed to get rid of the warning you found. I was thinking this is also wrong because of locking assumptions, but I don't see that in the code now, so I guess it's fine. johannes
