http://bugzilla.suse.com/show_bug.cgi?id=1167245 http://bugzilla.suse.com/show_bug.cgi?id=1167245#c7 --- Comment #7 from Jiri Slaby <jslaby@suse.com> --- The crash is in device_links_flush_sync_list: if (dev->bus->sync_state) dev->bus->sync_state(dev); dev->bus is NULL, sync_state is at offset 0x48, hence the crash:

BUG: kernel NULL pointer dereference, address: 0000000000000048 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 0 PID: 2433 Comm: modprobe Not tainted 5.5.9-1-default #1 openSUSE Tumbleweed (unreleased) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-0-ga698c89-rebuilt.opensuse.org 04/01/2014 RIP: 0010:device_links_flush_sync_list+0xa7/0xe0 Code: 48 89 4a 08 48 89 11 48 89 85 d0 00 00 00 48 89 85 d8 00 00 00 49 39 ec 74 0c 48 8d bd 80 00 00 00 e8 ad 5a 2c 00 48 8b 45 60 <48> 8b 40 48 48 85 c0 75 80 48 8b 45 68 48 85 c0 0f 84 7b ff ff ff RSP: 0018:ffffa55dc2803b40 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffa55dc2803a98 RCX: ffffa55dc2803b68 RDX: ffffa55dc2803b68 RSI: ffff90831c64e800 RDI: ffffa55dc2803b68 RBP: ffff90831c64e800 R08: 0000000000000000 R09: 0000000000000228 R10: 0000000000000dc0 R11: 0000000001320122 R12: ffff90831c64e800 R13: ffffa55dc2803b68 R14: ffffffffa6f20080 R15: 0000000000000000 FS: 00007f252bf63740(0000) GS:ffff90831e400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000048 CR3: 00000000123ec000 CR4: 00000000000006f0 Call Trace: device_links_driver_bound+0x194/0x220 driver_bound+0x4c/0xe0 device_bind_driver+0x4d/0x60 mac80211_hwsim_new_radio+0x14a/0xdc0 [mac80211_hwsim] ? __class_register+0x10c/0x170 ? 0xffffffffc092c000 init_mac80211_hwsim+0x26f/0x1000 [mac80211_hwsim] ? 0xffffffffc092c000 do_one_initcall+0x46/0x200 ? _cond_resched+0x15/0x30 ? kmem_cache_alloc_trace+0x189/0x280 ? do_init_module+0x23/0x230 do_init_module+0x5c/0x230 load_module+0x14b2/0x1650 ? __do_sys_init_module+0x16e/0x1a0 __do_sys_init_module+0x16e/0x1a0 do_syscall_64+0x64/0x240 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f252c08ed9a Code: 48 8b 0d f9 f0 0b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 af 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c6 f0 0b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffd0bc12378 EFLAGS: 00000246 ORIG_RAX: 00000000000000af RAX: ffffffffffffffda RBX: 0000559358949ee0 RCX: 00007f252c08ed9a RDX: 000055935894a750 RSI: 000000000002180b RDI: 00007f2527cc8010 RBP: 00007f2527cc8010 R08: 0000000000000000 R09: 00007f252c4559e0 R10: 0000000000000001 R11: 0000000000000246 R12: 000055935894a750 R13: 0000000000000000 R14: 0000559358949f80 R15: 0000559358949ee0 Modules linked in: mac80211_hwsim(+) mac80211 cfg80211 libarc4 nls_utf8 isofs fuse af_packet rfkill xt_tcpudp ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nfnetlink ebtable_filter ebtables scsi_transport_iscsi ip6table_filter ip6_tables iptable_filter ip_tables x_tables bpfilter ppdev snd_hda_codec_generic ledtrig_audio bochs_drm drm_vram_helper drm_ttm_helper ttm drm_kms_helper snd_hda_intel snd_intel_dspcfg snd_hda_codec drm snd_hda_core joydev snd_hwdep pcspkr snd_pcm parport_pc snd_timer snd parport fb_sys_fops syscopyarea sysfillrect soundcore sysimgblt i2c_piix4 button hid_generic usbhid btrfs blake2b_generic libcrc32c xor ehci_pci ata_generic raid6_pq ehci_hcd sr_mod cdrom usbcore ata_piix virtio_net virtio_blk serio_raw floppy virtio_scsi net_failover failover qemu_fw_cfg sg dm_multipath dm_mod scsi_dh_rdac scsi_dh_emc scsi_dh_alua CR2: 0000000000000048 ---[ end trace 085626c17d7c1908 ]---

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