I have observed on my two main machines that I am getting a kernel oops when I boot that only occurs when I am running IWD 1.8. When I downgrade to IWD 1.7, the oops goes away. I have observed this on kernels 5.7.4 and 5.7.5 (at least). The kernel oops does not seem to negatively impact the operation of the system, and wireless works fine after this as well. Here are the oops details: [ 2.951230] ------------[ cut here ]------------ [ 2.951235] WARNING: CPU: 13 PID: 3703 at net/wireless/nl80211.c:7259 nl80211_get_reg_do+0x1f1/0x220 [ 2.951235] Modules linked in: algif_aead algif_skcipher md4 algif_hash af_alg amd64_edac_mod(-) pcc_cpufreq(-) iwlmvm btusb btrtl btbcm btintel bluetooth ecdh_generic iwlwifi ecc snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel crypto_simd cryptd snd_hda_intel glue_helper snd_intel_dspcfg snd_hda_codec k10temp snd_hwdep snd_hda_core [ 2.951245] CPU: 13 PID: 3703 Comm: iwd Tainted: G T 5.7.5 #2 [ 2.951246] Hardware name: Micro-Star International Co., Ltd. MS-7B93/MPG X570 GAMING PRO CARBON WIFI (MS-7B93), BIOS 1.50 11/06/2019 [ 2.951248] RIP: 0010:nl80211_get_reg_do+0x1f1/0x220 [ 2.951249] Code: 24 0c 01 00 00 00 e8 7e 13 7b ff 85 c0 0f 84 01 ff ff ff eb a6 48 89 ef 48 89 04 24 e8 48 5b e4 ff 48 8b 04 24 e9 43 ff ff ff <0f> 0b 48 89 ef e8 35 5b e4 ff b8 ea ff ff ff e9 2f ff ff ff e9 78 [ 2.951250] RSP: 0018:ffffaff480b9fc10 EFLAGS: 00010202 [ 2.951251] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 2.951252] RDX: ffff8bcf874c0008 RSI: 0000000000000000 RDI: ffff8bcf874c0300 [ 2.951252] RBP: ffff8bcf8d5d7700 R08: 0000000000000004 R09: ffff8bcf911cb014 [ 2.951253] R10: 0000000000000017 R11: ffffffff8874a580 R12: ffffaff480b9fc68 [ 2.951254] R13: 0000000000000000 R14: ffff8bcf911cb014 R15: ffff8bcf874c0300 [ 2.951255] FS: 00007f715bc30740(0000) GS:ffff8bcf9eb40000(0000) knlGS:0000000000000000 [ 2.951256] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.951256] CR2: 00007f715bbcca55 CR3: 0000000fd16b8000 CR4: 0000000000340ee0 [ 2.951257] Call Trace: [ 2.951261] ? _cond_resched+0x15/0x30 [ 2.951264] genl_rcv_msg+0x1bd/0x320 [ 2.951266] ? genl_family_rcv_msg_attrs_parse+0xf0/0xf0 [ 2.951268] netlink_rcv_skb+0x49/0x110 [ 2.951269] genl_rcv+0x24/0x40 [ 2.951271] netlink_unicast+0x191/0x230 [ 2.951272] netlink_sendmsg+0x21e/0x430 [ 2.951275] __sys_sendto+0x1a4/0x1c0 [ 2.951278] __x64_sys_sendto+0x25/0x30 [ 2.951280] do_syscall_64+0x48/0x130 [ 2.951282] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 2.951283] RIP: 0033:0x7f715bd31c7c [ 2.951284] Code: c0 ff ff ff ff eb bc 0f 1f 80 00 00 00 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 c3 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 [ 2.951285] RSP: 002b:00007ffe48183bd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 2.951286] RAX: ffffffffffffffda RBX: 000055bff8539870 RCX: 00007f715bd31c7c [ 2.951286] RDX: 000000000000001c RSI: 000055bff854da30 RDI: 0000000000000004 [ 2.951287] RBP: 000055bff8544bc0 R08: 0000000000000000 R09: 0000000000000000 [ 2.951287] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe48183c30 [ 2.951288] R13: 00007ffe48183c2c R14: 000055bff8543500 R15: 0000000000000000 [ 2.951289] ---[ end trace 4fa37a5b4f72d39c ]--- Note that I am using Intel wireless cards in both of my systems. This system has the AX200 Intel card, and my other system has an older low-end single-stream 433Mbps 802.11ac chipset (I think the Intel 3165). This system is Gentoo, Ryzen 9 3900x, AMD x570 chipset. The other system is Arch Linux, Ryzen 7 2700x, AMD B350 chipset. Both recently updated to IWD 1.8, which is when I started seeing this. I have tried to run the current git master branch (currently f7c036a8018213d3b8ce3fe36fdceeb633c00c54), but I can't get iwd to start on that commit (it just exits with a non-zero return. I tried to strace it, and it seems to be having some issue with accessing the kernel keystore, maybe?) I wanted to report this here so that it would be noticed, and possibly fixed in a future release. I am happy to test patches.