Hi, I am forwarding the following issue from Gentoo linux to you here. Please see: https://bugs.gentoo.org/746539 I hope this is the right place to continue with this issue. This is the summary: iwd-1.7 was not hit, but 1.8 and 1.9 have been hit by the issue. The kernel has been bisected down to this commit: https://git.kernel.org/pub/scm/network/wireless/iwd.git/commit/?id=b43e91... However, it may not be the real cause, maybe only revealing the issue. Still happening with linux 5.9.1. In the testbed iwd gets started via systemd (at least here). Note: Starting the service *after* the boot process manually does *not* crash. So, currently everything works, as the service gets restarted after the initial crash. Last but not least, the output of dmesg: [ 16.086329] ------------[ cut here ]------------ [ 16.086333] WARNING: CPU: 0 PID: 370 at net/wireless/nl80211.c:7284 nl80211_get_reg_do+0x1fc/0x230 [ 16.086334] CPU: 0 PID: 370 Comm: iwd Not tainted 5.8.13 #15 [ 16.086335] Hardware name: LENOVO 20KFCTO1WW/20KFCTO1WW, BIOS N20ET55W (1.40 ) 06/01/2020 [ 16.086336] RIP: 0010:nl80211_get_reg_do+0x1fc/0x230 [ 16.086338] Code: 00 00 00 48 89 ef e8 13 ff 85 ff 85 c0 0f 84 01 ff ff ff eb a6 48 89 ef 48 89 04 24 e8 4d ff e0 ff 48 8b 04 24 e9 43 ff ff ff <0f> 0b 48 89 ef e8 3a ff e0 ff b8 ea ff ff ff e9 2f ff ff ff e9 78 [ 16.086338] RSP: 0018:ffff9ab9c041bb98 EFLAGS: 00010202 [ 16.086339] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 16.086340] RDX: ffff95472b7b0008 RSI: 0000000000000000 RDI: ffff95472b7b02e0 [ 16.086340] RBP: ffff9547264c1d00 R08: 0000000000000004 R09: ffff954728585014 [ 16.086340] R10: ffff954728581000 R11: 0000000000000001 R12: ffff9ab9c041bbf0 [ 16.086341] R13: 0000000000000000 R14: ffff954728585014 R15: ffff95472b7b02e0 [ 16.086341] FS: 00007f346c24e740(0000) GS:ffff95472e400000(0000) knlGS:0000000000000000 [ 16.086342] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 16.086342] CR2: 000055f2e8fc3010 CR3: 00000004222c2002 CR4: 00000000003606f0 [ 16.086343] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 16.086343] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 16.086344] Call Trace: [ 16.086346] genl_rcv_msg+0x1ae/0x2f0 [ 16.086348] ? genl_family_rcv_msg_attrs_parse.isra.0+0xd0/0xd0 [ 16.086349] netlink_rcv_skb+0x46/0x110 [ 16.086350] genl_rcv+0x1f/0x30 [ 16.086351] netlink_unicast+0x197/0x230 [ 16.086352] netlink_sendmsg+0x1ed/0x400 [ 16.086353] __sys_sendto+0x1d3/0x1f0 [ 16.086355] __x64_sys_sendto+0x21/0x30 [ 16.086356] do_syscall_64+0x4d/0x1d0 [ 16.086358] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 16.086360] RIP: 0033:0x7f346c3d862c [ 16.086361] Code: 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 21 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 6c e9 91 0c 04 00 0f 1f 80 00 00 00 00 55 48 [ 16.086361] RSP: 002b:00007fff38eb6978 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 16.086362] RAX: ffffffffffffffda RBX: 000055f2e8faab00 RCX: 00007f346c3d862c [ 16.086362] RDX: 000000000000001c RSI: 000055f2e8fc2ac0 RDI: 0000000000000004 [ 16.086363] RBP: 000055f2e8fc1910 R08: 0000000000000000 R09: 0000000000000000 [ 16.086363] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff38eb6a08 [ 16.086364] R13: 000055f2e8fb4910 R14: 000055f2e8fb4790 R15: 0000000000000000 [ 16.086364] ---[ end trace a7bf7b4f3a41fe0a ]--- Thanks!