repeatable usb crash

I have a situation that I have not seen before.

1 - I plug a card reader into a USB3 port of a server

2 - I insert an SD card into the reader. It is /dev/sdk.
   within a few seconds the full set of USB interfaces disconnect and the machine
   locks up soon after.

3 - I log in through a serial console

4 - I attempt to shut down mythtv
   at this point the machine totally crashes. No magic sysrq response.

Pressing the reset button caused a boot into grub, looping with errors.
A full power off/on brought the system up properly. (*1)
I did it again, to check that the crash is related to the SD card, with same result.

- The card reader is regularly used and never had any problem.
- The same card reader and SD card then worked just fine on another machine.

The SD card is the only new item here, acquired recently and maybe used for the first
time.

I find it unusual that an SD card can lead to the whole USB system aborting.
The death of MythTV is probably due to the unexpected disappearance of the USB tuners, but
it could
probably do better than just crash with "NULL pointer dereference".

This machine runs latest f30 (I know, I am just about to upgrade to f32).
$ uname -a
Linux e7.eyal.emu.id.au 5.6.13-100.fc30.x86_64 #1 SMP Fri May 15 00:36:06 UTC 2020 x86_64
x86_64 x86_64 GNU/Linux

(*1) the fact that a reset did not lead to a good restart makes me suspect that the
problem is
related to the hardware (the mobo? the fw?).

================================
##### 1 Card reader plugged in
Jun 23 18:05:55 e7 kernel: usb 2-7: new SuperSpeed Gen 1 USB device number 5 using
xhci_hcd
Jun 23 18:05:55 e7 kernel: usb 2-7: New USB device found, idVendor=05e3, idProduct=0732,
bcdDevice= 5.66
Jun 23 18:05:55 e7 kernel: usb 2-7: New USB device strings: Mfr=3, Product=4,
SerialNumber=5
Jun 23 18:05:55 e7 kernel: usb 2-7: Product:  USB3 Reader
Jun 23 18:05:55 e7 kernel: usb 2-7: Manufacturer: Genesys
Jun 23 18:05:55 e7 kernel: usb 2-7: SerialNumber: 00000000566
Jun 23 18:05:55 e7 mtp-probe[3763]: checking bus 2, device 5:
"/sys/devices/pci0000:00/0000:00:14.0/usb2/2-7"
Jun 23 18:05:55 e7 mtp-probe[3763]: bus: 2, device: 5 was not an MTP device
Jun 23 18:05:55 e7 kernel: usb-storage 2-7:1.0: USB Mass Storage device detected
Jun 23 18:05:55 e7 kernel: scsi host7: usb-storage 2-7:1.0
Jun 23 18:05:55 e7 kernel: usbcore: registered new interface driver usb-storage
Jun 23 18:05:55 e7 kernel: usbcore: registered new interface driver uas
Jun 23 18:05:55 e7 mtp-probe[3772]: checking bus 2, device 5:
"/sys/devices/pci0000:00/0000:00:14.0/usb2/2-7"
Jun 23 18:05:55 e7 mtp-probe[3772]: bus: 2, device: 5 was not an MTP device
Jun 23 18:05:56 e7 kernel: scsi 7:0:0:0: Direct-Access     Generic  STORAGE DEVICE   0566
PQ: 0 ANSI: 6
Jun 23 18:05:56 e7 kernel: scsi 7:0:0:1: Direct-Access     Generic  STORAGE DEVICE   0566
PQ: 0 ANSI: 6
Jun 23 18:05:56 e7 kernel: scsi 7:0:0:2: Direct-Access     Generic  STORAGE DEVICE   0566
PQ: 0 ANSI: 6
Jun 23 18:05:56 e7 kernel: scsi 7:0:0:3: Direct-Access     Generic  STORAGE DEVICE   0566
PQ: 0 ANSI: 6
Jun 23 18:05:56 e7 kernel: sd 7:0:0:0: Attached scsi generic sg9 type 0
Jun 23 18:05:56 e7 kernel: sd 7:0:0:1: Attached scsi generic sg10 type 0
Jun 23 18:05:56 e7 kernel: sd 7:0:0:2: Attached scsi generic sg11 type 0
Jun 23 18:05:56 e7 kernel: sd 7:0:0:3: Attached scsi generic sg12 type 0
Jun 23 18:05:56 e7 kernel: sd 7:0:0:0: [sdj] Attached SCSI removable disk
Jun 23 18:05:56 e7 kernel: sd 7:0:0:3: [sdm] Attached SCSI removable disk
Jun 23 18:05:56 e7 kernel: sd 7:0:0:1: [sdk] Attached SCSI removable disk
Jun 23 18:05:56 e7 kernel: sd 7:0:0:2: [sdl] Attached SCSI removable disk
Jun 23 18:06:01 e7 audit[3787]: USER_ACCT pid=3787 uid=0 auid=4294967295 ses=4294967295
msg='op=PAM:accounting grantors=pam_access,pam_unix acct="eyal"
exe="/usr/sbin/crond" hostname=? addr=? terminal=cron res=success'
Jun 23 18:06:01 e7 systemd[1]: Started Session 3 of user eyal.
Jun 23 18:06:01 e7 kernel: audit: type=1101 audit(1592899561.379:790): pid=3787 uid=0
auid=4294967295 ses=4294967295 msg='op=PAM:accounting grantors=pam_access,pam_unix
acct="eyal" exe="/usr/sbin/crond" hostname=? addr=? terminal=cron
res=success'
Jun 23 18:06:01 e7 kernel: audit: type=1103 audit(1592899561.379:791): pid=3787 uid=0
auid=4294967295 ses=4294967295 msg='op=PAM:setcred grantors=pam_env,pam_unix
acct="eyal" exe="/usr/sbin/crond" hostname=? addr=? terminal=cron
res=success'
Jun 23 18:06:01 e7 audit[3787]: CRED_ACQ pid=3787 uid=0 auid=4294967295 ses=4294967295
msg='op=PAM:setcred grantors=pam_env,pam_unix acct="eyal"
exe="/usr/sbin/crond" hostname=? addr=? terminal=cron res=success'
Jun 23 18:06:01 e7 kernel: audit: type=1006 audit(1592899561.379:792): pid=3787 uid=0
old-auid=4294967295 auid=500 tty=(none) old-ses=4294967295 ses=3 res=1
Jun 23 18:06:01 e7 kernel: audit: type=1105 audit(1592899561.383:793): pid=3787 uid=0
auid=500 ses=3 msg='op=PAM:session_open
grantors=pam_loginuid,pam_keyinit,pam_limits,pam_systemd acct="eyal"
exe="/usr/sbin/crond" hostname=? addr=? terminal=cron res=success'
Jun 23 18:06:01 e7 audit[3787]: USER_START pid=3787 uid=0 auid=500 ses=3
msg='op=PAM:session_open grantors=pam_loginuid,pam_keyinit,pam_limits,pam_systemd
acct="eyal" exe="/usr/sbin/crond" hostname=? addr=? terminal=cron
res=success'
Jun 23 18:06:01 e7 kernel: audit: type=1110 audit(1592899561.384:794): pid=3787 uid=0
auid=500 ses=3 msg='op=PAM:setcred grantors=pam_env,pam_unix acct="eyal"
exe="/usr/sbin/crond" hostname=? addr=? terminal=cron res=success'
Jun 23 18:06:01 e7 audit[3787]: CRED_REFR pid=3787 uid=0 auid=500 ses=3
msg='op=PAM:setcred grantors=pam_env,pam_unix acct="eyal"
exe="/usr/sbin/crond" hostname=? addr=? terminal=cron res=success'
##### 2 SD card inserted
Jun 23 18:06:09 e7 kernel: sd 7:0:0:1: [sdk] 31102976 512-byte logical blocks: (15.9
GB/14.8 GiB)
Jun 23 18:06:09 e7 kernel: sdk: sdk1 sdk2
Jun 23 18:06:16 e7 audit[3787]: CRED_DISP pid=3787 uid=0 auid=500 ses=3
msg='op=PAM:setcred grantors=pam_env,pam_unix acct="eyal"
exe="/usr/sbin/crond" hostname=? addr=? terminal=cron res=success'
Jun 23 18:06:16 e7 systemd[1]: session-3.scope: Succeeded.
Jun 23 18:06:16 e7 audit[3787]: USER_END pid=3787 uid=0 auid=500 ses=3
msg='op=PAM:session_close grantors=pam_loginuid,pam_keyinit,pam_limits,pam_systemd
acct="eyal" exe="/usr/sbin/crond" hostname=? addr=? terminal=cron
res=success'
Jun 23 18:06:16 e7 kernel: audit: type=1104 audit(1592899576.742:795): pid=3787 uid=0
auid=500 ses=3 msg='op=PAM:setcred grantors=pam_env,pam_unix acct="eyal"
exe="/usr/sbin/crond" hostname=? addr=? terminal=cron res=success'
Jun 23 18:06:16 e7 kernel: audit: type=1106 audit(1592899576.742:796): pid=3787 uid=0
auid=500 ses=3 msg='op=PAM:session_close
grantors=pam_loginuid,pam_keyinit,pam_limits,pam_systemd acct="eyal"
exe="/usr/sbin/crond" hostname=? addr=? terminal=cron res=success'
Jun 23 18:06:17 e7 kernel: usb 2-7: Disable of device-initiated U1 failed.
Jun 23 18:06:17 e7 kernel: usb 2-7: Disable of device-initiated U2 failed.
Jun 23 18:06:23 e7 kernel: xhci_hcd 0000:00:14.0: xHCI host not responding to stop
endpoint command.
Jun 23 18:06:23 e7 kernel: xhci_hcd 0000:00:14.0: xHCI host controller not responding,
assume dead
Jun 23 18:06:23 e7 kernel: xhci_hcd 0000:00:14.0: Timeout while waiting for setup device
command
Jun 23 18:06:23 e7 kernel: xhci_hcd 0000:00:14.0: HC died; cleaning up
Jun 23 18:06:23 e7 kernel: usb 1-2: USB disconnect, device number 2
Jun 23 18:06:23 e7 upsd[3242]: Data for UPS [eaton] is stale - check driver
Jun 23 18:06:23 e7 upsd[3242]: Data for UPS [eaton] is stale - check driver
Jun 23 18:06:23 e7 kernel: usb 1-2.2: USB disconnect, device number 4
Jun 23 18:06:23 e7 kernel: usb 1-4.1: dvb_usb_v2: rc.query() failed=-19
Jun 23 18:06:23 e7 kernel: usb 1-4.4: dvb_usb_v2: rc.query() failed=-19
Jun 23 18:06:23 e7 kernel: usb 2-3: USB disconnect, device number 2
Jun 23 18:06:23 e7 kernel: usb 2-4: USB disconnect, device number 3
Jun 23 18:06:23 e7 kernel: usb 2-5: USB disconnect, device number 4
Jun 23 18:06:23 e7 kernel: usb 1-4.3: dvb_usb_v2: rc.query() failed=-19
Jun 23 18:06:23 e7 kernel: usb 2-7: USB disconnect, device number 0
Jun 23 18:06:23 e7 kernel: usb 1-3: USB disconnect, device number 3
Jun 23 18:06:23 e7 kernel: usb 1-3.1: USB disconnect, device number 6
Jun 23 18:06:23 e7 kernel: usb 1-11: dvb_usb_v2: rc.query() failed=-19
Jun 23 18:06:23 e7 kernel: usb 1-3.2: USB disconnect, device number 9
Jun 23 18:06:23 e7 kernel: usb 1-3.3: USB disconnect, device number 16
Jun 23 18:06:23 e7 kernel: pl2303 ttyUSB0: error sending break = -19
Jun 23 18:06:23 e7 kernel: pl2303 ttyUSB0: pl2303 converter now disconnected from
ttyUSB0
Jun 23 18:06:23 e7 kernel: pl2303 1-3.3:1.0: device disconnected
Jun 23 18:06:23 e7 kernel: usb 1-3.4: USB disconnect, device number 17
Jun 23 18:06:23 e7 kernel: usblp0: removed
Jun 23 18:06:23 e7 kernel: usb 1-4: USB disconnect, device number 5
Jun 23 18:06:23 e7 kernel: usb 1-4.1: USB disconnect, device number 8
Jun 23 18:06:23 e7 kernel: usb 1-4.2: dvb_usb_v2: rc.query() failed=-19
Jun 23 18:06:23 e7 kernel: r820t 6-001a: r820t_write: i2c wr failed=-19 reg=06 len=1: b1
Jun 23 18:06:23 e7 kernel: r820t 6-001a: destroying instance
Jun 23 18:06:23 e7 kernel: dvb_usb_v2: 'Realtek RTL2832U reference design:1-4.1'
successfully deinitialized and disconnected
Jun 23 18:06:23 e7 kernel: usb 1-4.2: USB disconnect, device number 11
Jun 23 18:06:23 e7 kernel: dvb_usb_v2: 'Realtek RTL2832U reference design:1-4.2'
successfully deinitialized and disconnected
Jun 23 18:06:23 e7 kernel: usb 1-4.3: USB disconnect, device number 13
Jun 23 18:06:23 e7 kernel: dvb_usb_v2: 'Realtek RTL2832U reference design:1-4.3'
successfully deinitialized and disconnected
Jun 23 18:06:23 e7 kernel: usb 1-4.4: USB disconnect, device number 15
Jun 23 18:06:23 e7 kernel: dvb_usb_v2: 'Realtek RTL2832U reference design:1-4.4'
successfully deinitialized and disconnected
Jun 23 18:06:23 e7 kernel: usb 1-5: USB disconnect, device number 7
Jun 23 18:06:23 e7 kernel: usb 1-5.1: USB disconnect, device number 12
Jun 23 18:06:23 e7 NetworkManager[1215]: <info>  [1592899583.8288] bluez5: NAP:
removed interface 00:02:5B:05:24:9B
Jun 23 18:06:23 e7 kernel: usb 1-5.3: USB disconnect, device number 14
Jun 23 18:06:23 e7 kernel: usb 1-11: USB disconnect, device number 10
Jun 23 18:06:23 e7 kernel: r820t 8-001a: r820t_write: i2c wr failed=-19 reg=06 len=1: b1
Jun 23 18:06:23 e7 kernel: r820t 8-001a: destroying instance
Jun 23 18:06:23 e7 kernel: dvb_usb_v2: 'Realtek RTL2832U reference design:1-11'
successfully deinitialized and disconnected
Jun 23 18:06:23 e7 kernel: usb 2-7: device not accepting address 5, error -22
Jun 23 18:06:23 e7 kernel: sd 7:0:0:1: [sdk] tag#0 FAILED Result: hostbyte=DID_ERROR
driverbyte=DRIVER_OK cmd_age=14s
Jun 23 18:06:23 e7 kernel: sd 7:0:0:1: [sdk] tag#0 CDB: Read(10) 28 00 01 da 97 c0 00 00
08 00
Jun 23 18:06:23 e7 kernel: blk_update_request: I/O error, dev sdk, sector 31102912 op
0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
Jun 23 18:06:23 e7 kernel: sd 7:0:0:1: [sdk] tag#0 FAILED Result: hostbyte=DID_NO_CONNECT
driverbyte=DRIVER_OK cmd_age=0s
Jun 23 18:06:23 e7 kernel: sd 7:0:0:1: [sdk] tag#0 CDB: Read(10) 28 00 01 da 97 c0 00 00
08 00
Jun 23 18:06:23 e7 kernel: blk_update_request: I/O error, dev sdk, sector 31102912 op
0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Jun 23 18:06:24 e7 kernel: Buffer I/O error on dev sdk, logical block 3887864, async page
read
Jun 23 18:06:27 e7 mythbackend[2672]: 2020-06-23 18:06:27.737781 N 
autoexpire.cpp:259:CalcParams  AutoExpire: CalcParams(): Max required Free Space: 1.0 GB
w/freq: 15 min
Jun 23 18:06:27 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:06:27 e7 upsmon[3244]: Communications with UPS eaton@ups lost
Jun 23 18:06:27 e7 upsmon[3244]: Network UPS Tools upsmon 2.7.4
Jun 23 18:06:32 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:06:37 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:06:42 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:06:47 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:06:52 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:06:57 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:07:02 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
##### 3 logged in through serial console
Jun 23 18:07:06 e7 audit[3228]: USER_AUTH pid=3228 uid=0 auid=4294967295 ses=4294967295
msg='op=PAM:authentication grantors=pam_unix acct="eyal"
exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=? terminal=ttyS0
res=success'
Jun 23 18:07:06 e7 systemd-logind[1182]: New session 4 of user eyal.
Jun 23 18:07:06 e7 systemd[1]: Started Session 4 of user eyal.
Jun 23 18:07:06 e7 audit[3228]: USER_ACCT pid=3228 uid=0 auid=4294967295 ses=4294967295
msg='op=PAM:accounting grantors=pam_unix acct="eyal"
exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=? terminal=ttyS0
res=success'
Jun 23 18:07:06 e7 audit[3228]: CRED_ACQ pid=3228 uid=0 auid=4294967295 ses=4294967295
msg='op=PAM:setcred grantors=pam_unix acct="eyal"
exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=? terminal=ttyS0
res=success'
Jun 23 18:07:06 e7 kernel: audit: type=1100 audit(1592899626.341:797): pid=3228 uid=0
auid=4294967295 ses=4294967295 msg='op=PAM:authentication grantors=pam_unix
acct="eyal" exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=?
terminal=ttyS0 res=success'
Jun 23 18:07:06 e7 kernel: audit: type=1101 audit(1592899626.341:798): pid=3228 uid=0
auid=4294967295 ses=4294967295 msg='op=PAM:accounting grantors=pam_unix
acct="eyal" exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=?
terminal=ttyS0 res=success'
Jun 23 18:07:06 e7 kernel: audit: type=1103 audit(1592899626.341:799): pid=3228 uid=0
auid=4294967295 ses=4294967295 msg='op=PAM:setcred grantors=pam_unix
acct="eyal" exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=?
terminal=ttyS0 res=success'
Jun 23 18:07:06 e7 kernel: audit: type=1006 audit(1592899626.341:800): pid=3228 uid=0
old-auid=4294967295 auid=500 tty=ttyS0 old-ses=4294967295 ses=4 res=1
Jun 23 18:07:06 e7 kernel: audit: type=1105 audit(1592899626.393:801): pid=3228 uid=0
auid=500 ses=4 msg='op=PAM:session_open
grantors=pam_selinux,pam_loginuid,pam_console,pam_selinux,pam_namespace,pam_keyinit,pam_keyinit,pam_limits,pam_systemd,pam_unix,pam_umask,pam_lastlog,pam_ck_connector
acct="eyal" exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=?
terminal=ttyS0 res=success'
Jun 23 18:07:06 e7 audit[3228]: USER_START pid=3228 uid=0 auid=500 ses=4
msg='op=PAM:session_open
grantors=pam_selinux,pam_loginuid,pam_console,pam_selinux,pam_namespace,pam_keyinit,pam_keyinit,pam_limits,pam_systemd,pam_unix,pam_umask,pam_lastlog,pam_ck_connector
acct="eyal" exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=?
terminal=ttyS0 res=success'
Jun 23 18:07:06 e7 kernel: audit: type=1110 audit(1592899626.393:802): pid=3228 uid=0
auid=500 ses=4 msg='op=PAM:setcred grantors=pam_unix acct="eyal"
exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=? terminal=ttyS0
res=success'
Jun 23 18:07:06 e7 audit[3228]: CRED_REFR pid=3228 uid=0 auid=500 ses=4
msg='op=PAM:setcred grantors=pam_unix acct="eyal"
exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=? terminal=ttyS0
res=success'
Jun 23 18:07:06 e7 kernel: audit: type=1112 audit(1592899626.393:803): pid=3228 uid=0
auid=500 ses=4 msg='op=login id=500 exe="/usr/bin/login"
hostname=e7.eyal.emu.id.au addr=? terminal=ttyS0 res=success'
Jun 23 18:07:06 e7 audit[3228]: USER_LOGIN pid=3228 uid=0 auid=500 ses=4 msg='op=login
id=500 exe="/usr/bin/login" hostname=e7.eyal.emu.id.au addr=? terminal=ttyS0
res=success'
Jun 23 18:07:07 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:07:12 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:07:17 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:07:22 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:07:27 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:07:32 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
##### 4 Issued "mythtv-stop.sh" which does "systemctl stop
mythbackend"
Jun 23 18:07:35 e7 audit[4050]: USER_ACCT pid=4050 uid=500 auid=500 ses=4
msg='op=PAM:accounting grantors=pam_unix acct="eyal"
exe="/usr/bin/sudo" hostname=e7.eyal.emu.id.au addr=? terminal=/dev/ttyS0
res=success'
Jun 23 18:07:35 e7 audit[4050]: USER_CMD pid=4050 uid=500 auid=500 ses=4
msg='cwd="/home/eyal" cmd="mythtv-stop.sh"
exe="/usr/bin/sudo" terminal=ttyS0 res=success'
Jun 23 18:07:35 e7 systemd[1]: Stopping MythTV backend service...
Jun 23 18:07:35 e7 kernel: audit: type=1101 audit(1592899655.791:804): pid=4050 uid=500
auid=500 ses=4 msg='op=PAM:accounting grantors=pam_unix acct="eyal"
exe="/usr/bin/sudo" hostname=e7.eyal.emu.id.au addr=? terminal=/dev/ttyS0
res=success'
Jun 23 18:07:35 e7 kernel: audit: type=1123 audit(1592899655.791:805): pid=4050 uid=500
auid=500 ses=4 msg='cwd="/home/eyal" cmd="mythtv-stop.sh"
exe="/usr/bin/sudo" terminal=ttyS0 res=success'
Jun 23 18:07:35 e7 kernel: audit: type=1110 audit(1592899655.791:806): pid=4050 uid=0
auid=500 ses=4 msg='op=PAM:setcred grantors=pam_env,pam_unix acct="root"
exe="/usr/bin/sudo" hostname=e7.eyal.emu.id.au addr=? terminal=/dev/ttyS0
res=success'
Jun 23 18:07:35 e7 audit[4050]: CRED_REFR pid=4050 uid=0 auid=500 ses=4
msg='op=PAM:setcred grantors=pam_env,pam_unix acct="root"
exe="/usr/bin/sudo" hostname=e7.eyal.emu.id.au addr=? terminal=/dev/ttyS0
res=success'
Jun 23 18:07:35 e7 kernel: audit: type=1105 audit(1592899655.795:807): pid=4050 uid=0
auid=500 ses=4 msg='op=PAM:session_open
grantors=pam_keyinit,pam_limits,pam_keyinit,pam_limits,pam_systemd,pam_unix
acct="root" exe="/usr/bin/sudo" hostname=e7.eyal.emu.id.au addr=?
terminal=/dev/ttyS0 res=success'
Jun 23 18:07:35 e7 audit[4050]: USER_START pid=4050 uid=0 auid=500 ses=4
msg='op=PAM:session_open
grantors=pam_keyinit,pam_limits,pam_keyinit,pam_limits,pam_systemd,pam_unix
acct="root" exe="/usr/bin/sudo" hostname=e7.eyal.emu.id.au addr=?
terminal=/dev/ttyS0 res=success'
Jun 23 18:07:35 e7 mythbackend[2672]: 2020-06-23 18:07:35.817664 C 
signalhandling.cpp:302:handleSignal  Received Terminated: Code 0, PID 1, UID 0, Value
0x00000000
Jun 23 18:07:35 e7 mythbackend[2672]: 2020-06-23 18:07:35.818098 N 
main_helpers.cpp:743:run_backend  MythBackend exiting
Jun 23 18:07:35 e7 mythbackend[2672]: 2020-06-23 18:07:35.818620 I 
bonjourregister.cpp:26:~BonjourRegister  Bonjour: De-registering service
'_mythbackend._tcp.' on 'Mythbackend on e7.eyal.emu.id.au'
Jun 23 18:07:37 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:07:40 e7 kernel: BUG: kernel NULL pointer dereference, address:
0000000000000200
Jun 23 18:07:40 e7 kernel: #PF: supervisor write access in kernel mode
Jun 23 18:07:40 e7 kernel: #PF: error_code(0x0002) - not-present page
Jun 23 18:07:40 e7 kernel: PGD 84e644067 P4D 84e644067 PUD 898110067 PMD 0
Jun 23 18:07:40 e7 kernel: Oops: 0002 [#1] SMP NOPTI
Jun 23 18:07:40 e7 kernel: CPU: 1 PID: 2672 Comm: mythbackend Not tainted
5.6.13-100.fc30.x86_64 #1
Jun 23 18:07:40 e7 kernel: Hardware name: Gigabyte Technology Co., Ltd. Z390 UD/Z390 UD,
BIOS F8 05/24/2019
Jun 23 18:07:40 e7 kernel: RIP: 0010:dvb_frontend_release+0x3b/0x180 [dvb_core]
Jun 23 18:07:40 e7 kernel: Code: f5 53 48 8b 9e c8 00 00 00 4c 8b a3 90 00 00 00 4d 8b b4
24 10 03 00 00 0f 1f 44 00 00 f6 45 40 03 74 11 48 8b 05 05 4f a8 db <49> 89 86 00
02 00 00 0f ae f0 4c 89 ef 48 89 ee e8 50 5f ff ff 83
Jun 23 18:07:40 e7 kernel: RSP: 0018:ffffade802a7fe58 EFLAGS: 00010202
Jun 23 18:07:40 e7 kernel: RAX: 00000000ffff76cc RBX: ffff9a7b1abf6b40 RCX:
0000000000000001
Jun 23 18:07:40 e7 kernel: RDX: ffff9a7ad638a0d0 RSI: ffff9a7ad638a000 RDI:
ffff9a7b1b1b3b80
Jun 23 18:07:40 e7 kernel: RBP: ffff9a7ad638a000 R08: 0000000000000000 R09:
0000000000000000
Jun 23 18:07:40 e7 kernel: R10: ffff9a7b1b1b3b80 R11: ffff9a7ad638a010 R12:
ffff9a7b0eaa5928
Jun 23 18:07:40 e7 kernel: R13: ffff9a7b1b1b3b80 R14: 0000000000000000 R15:
ffff9a7b13819f00
Jun 23 18:07:40 e7 kernel: FS:  00007f49c5992940(0000) GS:ffff9a7b1e440000(0000)
knlGS:0000000000000000
Jun 23 18:07:40 e7 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jun 23 18:07:40 e7 kernel: CR2: 0000000000000200 CR3: 00000008561d8005 CR4:
00000000003606e0
Jun 23 18:07:40 e7 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
Jun 23 18:07:40 e7 kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
Jun 23 18:07:40 e7 kernel: Call Trace:
Jun 23 18:07:40 e7 kernel: __fput+0xc1/0x250
Jun 23 18:07:40 e7 kernel: task_work_run+0x8a/0xb0
Jun 23 18:07:40 e7 kernel: exit_to_usermode_loop+0x102/0x130
Jun 23 18:07:40 e7 kernel: do_syscall_64+0x1a6/0x1c0
Jun 23 18:07:40 e7 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9
Jun 23 18:07:40 e7 kernel: RIP: 0033:0x7f49cefaca6b
Jun 23 18:07:40 e7 kernel: Code: 00 00 0f 05 48 3d 00 f0 ff ff 77 43 c3 66 90 48 83 ec 18
89 7c 24 0c e8 e3 fb ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0
ff ff 77 2f 44 89 c7 89 44 24 0c e8 21 fc ff ff 8b 44
Jun 23 18:07:40 e7 kernel: RSP: 002b:00007ffeae4efaa0 EFLAGS: 00000293 ORIG_RAX:
0000000000000003
Jun 23 18:07:40 e7 kernel: RAX: 0000000000000000 RBX: 0000000002185d00 RCX:
00007f49cefaca6b
Jun 23 18:07:40 e7 kernel: RDX: 0000000002317de0 RSI: 0000000000000007 RDI:
000000000000000b
Jun 23 18:07:40 e7 kernel: RBP: 00007ffeae4efb50 R08: 0000000000000000 R09:
0000000000000006
Jun 23 18:07:40 e7 kernel: R10: 0000000002311ec8 R11: 0000000000000293 R12:
0000000002197fc0
Jun 23 18:07:40 e7 kernel: R13: 0000000002185e30 R14: 0000000002185dc8 R15:
0000000000000000
Jun 23 18:07:40 e7 kernel: Modules linked in: uas usb_storage xt_mac nf_log_ipv4
nf_log_common xt_limit xt_LOG nfsd auth_rpcgss nfsv4 dns_resolver nfs_acl nfs lockd grace
sunrpc fscache xt_CHECKSUM tun ip6table_mangle ip6table_nat iptable_mangle ebtable_filter
ebtables ip6table_filter ip6_tables cfg80211 br_netfilter bridge stp llc ipt_REJECT
nf_reject_ipv4 xt_state xt_conntrack xt_physdev iptable_filter xt_MASQUERADE iptable_nat
nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 bnep snd_sof_pci snd_sof_intel_byt
snd_sof_intel_ipc snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_xtensa_dsp
snd_sof_intel_hda snd_sof intel_rapl_msr intel_rapl_common snd_soc_skl snd_soc_sst_ipc
snd_soc_sst_dsp snd_hda_ext_core snd_hda_codec_hdmi snd_soc_acpi_intel_match snd_soc_acpi
snd_soc_core snd_hda_codec_realtek snd_compress snd_hda_codec_generic fc0012 ac97_bus
snd_pcm_dmaengine ledtrig_audio x86_pkg_temp_thermal intel_powerclamp raid456
snd_hda_intel coretemp async_raid6_recov snd_intel_dspcfg async_memcpy async_pq
Jun 23 18:07:40 e7 kernel: btusb async_xor kvm_intel snd_hda_codec btrtl async_tx kvm
snd_hda_core btbcm xor r820t irqbypass btintel snd_hwdep raid6_pq rtl2832 snd_seq i2c_mux
crct10dif_pclmul libcrc32c crc32_pclmul bluetooth snd_seq_device dvb_usb_rtl28xxu snd_pcm
ghash_clmulni_intel iTCO_wdt iTCO_vendor_support intel_cstate dvb_usb_v2 pl2303
intel_uncore dvb_core ecdh_generic rfkill snd_timer mei_hdcp ecc usblp snd intel_rapl_perf
intel_wmi_thunderbolt mc pcspkr i2c_i801 wmi_bmof soundcore mei_me mei intel_pch_thermal
ie31200_edac acpi_pad ip_tables i915 i2c_algo_bit cec mpt3sas drm_kms_helper raid_class
drm crc32c_intel e1000e r8169 scsi_transport_sas wmi pinctrl_cannonlake video
pinctrl_intel it87 hwmon_vid
Jun 23 18:07:40 e7 kernel: CR2: 0000000000000200
Jun 23 18:07:40 e7 kernel: ---[ end trace 2aa07bcc0dea7156 ]---
Jun 23 18:07:40 e7 kernel: RIP: 0010:dvb_frontend_release+0x3b/0x180 [dvb_core]
Jun 23 18:07:40 e7 kernel: Code: f5 53 48 8b 9e c8 00 00 00 4c 8b a3 90 00 00 00 4d 8b b4
24 10 03 00 00 0f 1f 44 00 00 f6 45 40 03 74 11 48 8b 05 05 4f a8 db <49> 89 86 00
02 00 00 0f ae f0 4c 89 ef 48 89 ee e8 50 5f ff ff 83
Jun 23 18:07:40 e7 kernel: RSP: 0018:ffffade802a7fe58 EFLAGS: 00010202
Jun 23 18:07:40 e7 kernel: RAX: 00000000ffff76cc RBX: ffff9a7b1abf6b40 RCX:
0000000000000001
Jun 23 18:07:40 e7 kernel: RDX: ffff9a7ad638a0d0 RSI: ffff9a7ad638a000 RDI:
ffff9a7b1b1b3b80
Jun 23 18:07:40 e7 kernel: RBP: ffff9a7ad638a000 R08: 0000000000000000 R09:
0000000000000000
Jun 23 18:07:40 e7 kernel: R10: ffff9a7b1b1b3b80 R11: ffff9a7ad638a010 R12:
ffff9a7b0eaa5928
Jun 23 18:07:40 e7 kernel: R13: ffff9a7b1b1b3b80 R14: 0000000000000000 R15:
ffff9a7b13819f00
Jun 23 18:07:40 e7 kernel: FS:  00007f49c5992940(0000) GS:ffff9a7b1e440000(0000)
knlGS:0000000000000000
Jun 23 18:07:40 e7 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jun 23 18:07:40 e7 kernel: CR2: 0000000000000200 CR3: 00000008561d8005 CR4:
00000000003606e0
Jun 23 18:07:40 e7 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
Jun 23 18:07:40 e7 kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
Jun 23 18:07:42 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
Jun 23 18:07:47 e7 upsmon[3244]: Poll UPS [eaton@ups] failed - Data stale
================================
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