Re: Fail to load network modules properly

[Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>]

On Sun, Jan 27, 2019 at 09:14:37PM +0100, Łukasz Słaboń wrote:
> Hello everyone,
> 
> Since starting using linux last year (xubuntu 18.04) I am experiencing
> occasional problems with wifi interface (broadcom BCM43224 rev 01
> 14e4:4353). From time to time (every 3 - 4 starts) my wifi card is not
> recognized and I do not see wifi interface after boot. After comparing
> dmesg listings from successful and failed boots I have discovered one
> difference. My main partition is mounted twice and in successful boot it is
> done before  before cfg80211 module. In failed boot second mount is done
> after cfg80211 module. Can this be a cause of network interface problems?
> If yes is there any possibility to solve this within systemd? Just to
> clarify such situations happen with proprietary and open-source drivers as
> well.
> 
> Here is the fragment of dmesg listing after successful boot:
> [    4.452703] [drm] Initialized radeon 2.50.0 20080528 for 0000:02:00.0 on
> minor 0
> [    4.601495] EXT4-fs (sda5): mounted filesystem with ordered data mode.
> Opts: (null)
> [    4.669690] clocksource: Switched to clocksource tsc
> [    5.068753] input: SynPS/2 Synaptics TouchPad as
> /devices/platform/i8042/serio1/input/input5
> [    5.774502] random: crng init done
> [    5.774503] random: 7 urandom warning(s) missed due to ratelimiting
> [    6.151902] ip_tables: (C) 2000-2006 Netfilter Core Team
> [    9.336683] lp: driver loaded but no devices found
> [    9.366325] ppdev: user-space parallel port driver
> [    9.405084] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro
> [   12.325130] Adding 2097148k swap on /swapfile.  Priority:-2 extents:6
> across:2260988k FS
> [   20.381638] cfg80211: Loading compiled-in X.509 certificates for
> regulatory database
> [   20.385106] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
> [   20.863926] wl: loading out-of-tree module taints kernel.
> [   20.863932] wl: module license 'MIXED/Proprietary' taints kernel.
> [   20.863932] Disabling lock debugging due to kernel taint
> [   20.866504] wl: module verification failed: signature and/or required
> key missing - tainting kernel
> [   20.941673] wlan0: Broadcom BCM4353 802.11 Hybrid Wireless Controller
> 6.30.223.271 (r587334)
> 
> Here is the fragment of dmesg listing after failed boot:
> [    5.194759] EXT4-fs (sda5): mounted filesystem with ordered data mode.
> Opts: (null)
> [    6.249451] random: crng init done
> [    6.249454] random: 7 urandom warning(s) missed due to ratelimiting
> [    6.728424] ip_tables: (C) 2000-2006 Netfilter Core Team
> [    9.888353] lp: driver loaded but no devices found
> [    9.913126] ppdev: user-space parallel port driver
> [   10.152833] cfg80211: Loading compiled-in X.509 certificates for
> regulatory database
> [   10.156199] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
> [   10.174030] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro
> [   21.275568] Adding 2097148k swap on /swapfile.  Priority:-2 extents:6
> across:2260988k FS
> [   21.472260] wl: loading out-of-tree module taints kernel.
> [   21.472264] wl: module license 'MIXED/Proprietary' taints kernel.
> [   21.472265] Disabling lock debugging due to kernel taint
> [   21.474938] wl: module verification failed: signature and/or required
> key missing - tainting kernel
> [   21.477657] wl 0000:08:00.0: enabling device (0000 -> 0002)
> [   21.477881] wl driver 6.30.223.271 (r587334) failed with code 1
> [   21.477882] ERROR @wl_cfg80211_detach :
> [   21.477883] NULL ndev->ieee80211ptr, unable to deref wl

Looks like a bug in the closed-source wl kernel driver.  Please contact
the authors of that code and ask them for help as there's really nothing
we can do about this.

sorry,

greg k-h
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