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 dmesg: BUG: using smp_processor_id() in preemptible [00000000] code: iwd/517 caller is __ieee80211_subif_start_xmit+0x144/0x210 [mac80211] CPU: 9 PID: 517 Comm: iwd Tainted: P O 4.17.0-1-custom #1 Hardware name: BIOS 05/14/2018 Call Trace: dump_stack+0x5c/0x80 check_preemption_disabled.cold.0+0x46/0x51 __ieee80211_subif_start_xmit+0x144/0x210 [mac80211] ieee80211_tx_control_port+0x116/0x140 [mac80211] nl80211_tx_control_port+0x13c/0x270 [cfg80211] genl_family_rcv_msg+0x1c4/0x3a0 ? _raw_spin_lock_irqsave+0x25/0x50 ? _raw_spin_unlock_irqrestore+0x20/0x40 ? ep_poll_callback+0x212/0x290 genl_rcv_msg+0x47/0x90 ? __kmalloc_node_track_caller+0x210/0x2b0 ? genl_family_rcv_msg+0x3a0/0x3a0 netlink_rcv_skb+0x4c/0x120 genl_rcv+0x24/0x40 netlink_unicast+0x196/0x240 netlink_sendmsg+0x1fd/0x3c0 sock_sendmsg+0x33/0x40 __sys_sendto+0xee/0x160 ? do_epoll_wait+0xb0/0xd0 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x5b/0x170 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f94f41c98cd RSP: 002b:00007ffd224eab48 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000557648053250 RCX: 00007f94f41c98cd RDX: 0000000000000098 RSI: 00005576480615e0 RDI: 0000000000000006 RBP: 0000557648062560 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd224eabb0 R13: 00007ffd224eabac R14: 0000000000000000 R15: 0000000000000000 Kernel: 4.17 mainline with iwlwifi patched for recent Intel9560/Killer1552 hardware VID/PIDs: https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/backport-iwlwifi.git/commit/?id=a3ef483ec5002b7af5a2ad04cb7a77366cd23b9f uCode: iwlwifi-9000-pu-b0-jf-b0-38 Tried iwd with both 0.2tag and master with same result. Appears minor, but please let me know if more info is required tracking this down.
