Hi backport team, I'm trying to backport wifi drivers from 5.15.8.1-1 to 4.15.0-3. However, starting NetworkManager results in the following kernel trace: kernel: [ 1442.859649] BUG: unable to handle kernel NULL pointer dereference at 00000000000001e8 kernel: [ 1442.859835] IP: cfg80211_init_wdev+0xa3/0x150 [cfg80211] kernel: [ 1442.859917] PGD 8000000187ac4067 P4D 8000000187ac4067 PUD 186ce3067 PMD 0 kernel: [ 1442.860037] Oops: 0000 [#1] SMP PTI kernel: [ 1442.860095] Modules linked in: ccm snd_hda_codec_hdmi bnep binfmt_misc snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core 8250_dw snd_soc_sst_dsp snd_soc_sst_ipc snd_soc_acpi snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi ipt_REJECT nf_reject_ipv4 bridge ath10k_pci(OE) stp nf_log_ipv4 llc nf_log_common ath10k_core(OE) snd_seq xt_LOG ath(OE) xt_limit intel_rapl xt_tcpudp x86_pkg_temp_thermal intel_powerclamp xt_addrtype coretemp snd_seq_device kvm_intel snd_timer kvm mac80211(OE) irqbypass intel_cstate intel_rapl_perf btusb snd btrtl btbcm joydev btintel input_leds bluetooth idma64 mei_me virt_dma intel_wmi_thunderbolt cfg80211(OE) compat(OE) soundcore ecdh_generic mei intel_lpss_pci intel_lpss shpchp May 24 14:23:14 mir kernel: [ 1442.861207] intel_pch_thermal intel_vbtn sparse_keymap acpi_pad nf_conntrack_ipv4 nf_defrag_ipv4 mac_hid xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear i915 crct10dif_pclmul crc32_pclmul drm_kms_helper hid_logitech_hidpp ghash_clmulni_intel syscopyarea pcbc hid_logitech_dj igb sysfillrect e1000e sysimgblt aesni_intel fb_sys_fops dca i2c_algo_bit aes_x86_64 usbhid crypto_simd ptp glue_helper wmi hid drm cryptd ahci pps_core libahci video kernel: [ 1442.862346] CPU: 1 PID: 29290 Comm: wpa_supplicant Tainted: G OE 4.15.0-38-generic #41~16.04.1-Ubuntu kernel: [ 1442.862492] Hardware name: DFI Inc. SU25x/EC70A, BIOS B208.07C 08/07/2020 kernel: [ 1442.862644] RIP: 0010:cfg80211_init_wdev+0xa3/0x150 [cfg80211] kernel: [ 1442.862737] RSP: 0018:ffffba9701feba20 EFLAGS: 00010282 kernel: [ 1442.862822] RAX: 0000000000000000 RBX: ffffa07e07ad0010 RCX: 0000000000000000 kernel: [ 1442.862938] RDX: ffffffffc09de1cc RSI: ffffffffc09bfa39 RDI: ffffa07e07ad0058 kernel: [ 1442.863054] RBP: ffffba9701feba28 R08: 0000000000000000 R09: ffffa07e07ad0010 kernel: [ 1442.863165] R10: ffffba9701feba08 R11: ffffa07e08ca0000 R12: ffffa07e07ad0010 kernel: [ 1442.863278] R13: ffffba9701febaf8 R14: ffffa07eb6f40000 R15: ffffa07eb6f40300 kernel: [ 1442.863410] FS: 00007f1e91b15880(0000) GS:ffffa07ec2480000(0000) knlGS:0000000000000000 kernel: [ 1442.863541] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kernel: [ 1442.863637] CR2: 00000000000001e8 CR3: 0000000188968002 CR4: 00000000003606e0 kernel: [ 1442.863748] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kernel: [ 1442.863857] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kernel: [ 1442.863967] Call Trace: kernel: [ 1442.864074] nl80211_new_interface+0x348/0x4a0 [cfg80211] kernel: [ 1442.864174] genl_family_rcv_msg+0x1fe/0x3e0 kernel: [ 1442.864258] genl_rcv_msg+0x4c/0x90 kernel: [ 1442.864327] ? genl_family_rcv_msg+0x3e0/0x3e0 kernel: [ 1442.864416] netlink_rcv_skb+0xd9/0x110 kernel: [ 1442.864489] genl_rcv+0x28/0x40 kernel: [ 1442.864547] netlink_unicast+0x198/0x260 kernel: [ 1442.864618] netlink_sendmsg+0x2e2/0x3d0 kernel: [ 1442.869965] sock_sendmsg+0x3e/0x50 kernel: [ 1442.874568] ___sys_sendmsg+0x2e9/0x300 kernel: [ 1442.879477] ? mem_cgroup_commit_charge+0x82/0x510 kernel: [ 1442.884419] ? __handle_mm_fault+0xf96/0x11e0 kernel: [ 1442.889381] __sys_sendmsg+0x54/0x90 kernel: [ 1442.893967] ? __sys_sendmsg+0x54/0x90 kernel: [ 1442.898509] SyS_sendmsg+0x12/0x20 kernel: [ 1442.903369] do_syscall_64+0x73/0x130 kernel: [ 1442.906876] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 kernel: [ 1442.909850] RIP: 0033:0x7f1e903bd8a0 kernel: [ 1442.912841] RSP: 002b:00007ffd91351258 EFLAGS: 00000246 ORIG_RAX: 000000000000002e kernel: [ 1442.915343] RAX: ffffffffffffffda RBX: 00000000012d2900 RCX: 00007f1e903bd8a0 kernel: [ 1442.917929] RDX: 0000000000000000 RSI: 00007ffd913512e0 RDI: 0000000000000006 kernel: [ 1442.920371] RBP: 00000000012d3d00 R08: 0000000000000000 R09: 0000000000000000 kernel: [ 1442.922630] R10: 00000000012d4ca0 R11: 0000000000000246 R12: 00000000012d4c60 kernel: [ 1442.924470] R13: 00007ffd913512e0 R14: 00007ffd913514f0 R15: 0000000000000000 kernel: [ 1442.926252] Code: 00 48 b8 e0 ff ff ff 0f 00 00 00 48 89 83 d8 03 00 00 48 8d 83 e0 03 00 00 48 89 83 e0 03 00 00 48 89 83 e8 03 00 00 48 8b 43 20 <48> 83 b8 e8 01 00 00 00 0f 84 8a 00 00 00 48 8b 03 c6 83 b4 03 kernel: [ 1442.928219] RIP: cfg80211_init_wdev+0xa3/0x150 [cfg80211] RSP: ffffba9701feba20 kernel: [ 1442.930159] CR2: 00000000000001e8 kernel: [ 1442.932054] ---[ end trace 0b637babb145a8e2 ]--- I'm running NetworkManager 1.2.6 and wpa_supplicant 2.4. I don't get the same issue with netctl. I encountered the same issue backporting from 4.19.221-1. Do you have any suggestions? -- To unsubscribe from this list: send the line "unsubscribe backports" in
