Package: hplip
Version: 3.14.1-1
Severity: normal
And this is what is logged:
Apr 20 13:04:22 debian kernel: [162198.348002] INFO: task hp-config_usb_p:6065
blocked for more than 120 seconds.
Apr 20 13:04:22 debian kernel: [162198.348005] Tainted: P O
3.13-1-amd64 #1
Apr 20 13:04:22 debian kernel: [162198.348006] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 20 13:04:22 debian kernel: [162198.348008] hp-config_usb_p D
ffff88040b54cb40 0 6065 1 0x00000080
Apr 20 13:04:22 debian kernel: [162198.348011] ffff88040b54c800
0000000000000086 0000000000014280 0000000000014280
Apr 20 13:04:22 debian kernel: [162198.348014] ffff880036b4bfd8
ffff88040b54c800 ffffffffa03a6040 ffff880036b4be78
Apr 20 13:04:22 debian kernel: [162198.348016] ffffffffa03a6044
ffff88040b54c800 00000000ffffffff ffffffffa03a6048
Apr 20 13:04:22 debian kernel: [162198.348018] Call Trace:
Apr 20 13:04:22 debian kernel: [162198.348033] [<ffffffff814a45d0>] ?
schedule_preempt_disabled+0x20/0x70
Apr 20 13:04:22 debian kernel: [162198.348036] [<ffffffff814a6043>] ?
__mutex_lock_slowpath+0x133/0x1b0
Apr 20 13:04:22 debian kernel: [162198.348040] [<ffffffff814a60d6>] ?
mutex_lock+0x16/0x25
Apr 20 13:04:22 debian kernel: [162198.348043] [<ffffffffa03a42d0>] ?
pp_ioctl+0x20/0x870 [ppdev]
Apr 20 13:04:22 debian kernel: [162198.348047] [<ffffffff8118b94f>] ?
do_vfs_ioctl+0x2cf/0x4a0
Apr 20 13:04:22 debian kernel: [162198.348048] [<ffffffff8118bba0>] ?
SyS_ioctl+0x80/0xa0
Apr 20 13:04:22 debian kernel: [162198.348052] [<ffffffff814aeb79>] ?
system_call_fastpath+0x16/0x1b
All this started to show up while testing a udev-rule to mount a
filesystem on a USB-stick connected to an usb-port in a hub built into
"HP Compaq LA2405x" monitors. I used:
# udevadm trigger --action=add /dev/sdg
which activates the rules in:
/lib/udev/rules.d/56-hpmud.rules
That rules run /usr/bin/hp-config_usb_printer on usb devices which
seem to be scanners (Device: ID 03f0:2512):
Bus 004 Device 004: ID 03f0:2512 Hewlett-Packard OfficeJet Pro L7300
Bus 003 Device 005: ID 03f0:2512 Hewlett-Packard OfficeJet Pro L7300
but they are not. They are usb-hubs that built into "HP Compaq
LA2405x" monitors. Seen the forked processes:
root 6065 0.0 0.0 126856 15076 ? D 12:53 0:00
/usr/bin/python /usr/bin/hp-config_usb_printer 003:005
root 6074 0.0 0.0 126856 15072 ? S 12:53 0:00
/usr/bin/python /usr/bin/hp-config_usb_printer 004:004
Took a look at:
# ls -al /proc/6074/fd
total 0
dr-x------ 2 root root 0 Apr 20 13:17 .
dr-xr-xr-x 9 root root 0 Apr 20 12:53 ..
lrwx------ 1 root root 64 Apr 20 13:17 0 -> /dev/null
lrwx------ 1 root root 64 Apr 20 13:17 1 -> /dev/null
lrwx------ 1 root root 64 Apr 20 13:17 13 -> socket:[3215190]
lrwx------ 1 root root 64 Apr 20 13:17 2 -> /dev/null
l-wx------ 1 root root 64 Apr 20 13:17 3 ->
/root/.hplip/hplip_config_usb_printer.log
lr-x------ 1 root root 64 Apr 20 13:17 4 -> /dev/parport0
and:
# ls -al /root/.hplip/hplip_config_usb_printer.log
-rw-r----- 1 root root 0 Apr 20 12:53
/root/.hplip/hplip_config_usb_printer.log
Killing the processes:
# kill -9 6074 6065
silences the kernel.
It shows up this is a problem reported here too:
https://bugs.launchpad.net/hplip/+bug/1266704
that even has a partial solution (This fix is released in HPLIP-3.14.3):
https://bugs.launchpad.net/hplip/+bug/1266704/comments/5
since 2014-03-13. Debian might consider a package upgrade. Still...
That bug report states "Usb device 003:004 is HP Smart Card Terminal
keyboard and Usb device 003:005 is HP mouse".
It seems the matching rule:
ATTR{idVendor}=="03f0", ATTR{idProduct}=="????",
in 56-hpmud.rules is _far_ too generous. I made a few attempts to
find ways to blacklist the 03f0:2512 devices. Came up with this one:
,----[ /etc/udev/rules.d/10-hpmud-blacklist.rules ]
| ACTION!="add|change", GOTO="hpmud_blacklist_rules_end"
| SUBSYSTEM!="usb", GOTO="hpmud_blacklist_rules_end"
| ENV{DEVTYPE}!="usb_device", GOTO="hpmud_blacklist_rules_end"
|
| ATTR{idVendor}=="03f0", ATTR{idProduct}=="2512",
ENV{ID_MM_DEVICE_IGNORE}:="1", RUN:="/usr/bin/logger -p info -t
10-hpmud-blacklist.rules -- ignore %N, /sys%p"
|
| LABEL="hpmud_blacklist_rules_end"
`----
But that doesn't stop /lib/udev/rules.d/56-hpmud.rules from doing it's
thing :(, when:
# udevadm trigger --action=add /dev/sdg
The only way I found in to avoid that is to modify 56-hpmud.rules:
LABEL="hpmud_usb_rules"
+# "03f0:2512 Hewlett-Packard OfficeJet Pro L7300" is an USB hub
+# integrated into an HP Compaq LA2405x monitor, on my system
+ATTR{idVendor}=="03f0", ATTR{idProduct}=="2512", PROGRAM="/bin/sh -c
'logger -p info -t 56-hpmud.rules -- skipping HP Device $env{BUSNUM}
$env{DEVNUM}'", GOTO="hpmud_rules_end"
which works, but is obviously not ideal (as editing distributed conf-files
is unsustainable).
Is there _any_ standard procedure I could use instead, to avoid
mangling 56-hpmud.rules?
-- System Information:
Debian Release: jessie/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.13-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Versions of packages hplip depends on:
ii adduser 3.113+nmu3
ii coreutils 8.21-1.2
ii cups 1.7.2-1
ii hplip-data 3.14.1-1
ii libc6 2.18-4
ii libcups2 1.7.2-1
ii libdbus-1-3 1.8.0-3
ii libhpmud0 3.14.1-1
ii libsane 1.0.24-1.1+b1
ii libsane-hpaio 3.14.1-1
ii libsnmp30 5.7.2.1~dfsg-3
ii libssl1.0.0 1.0.1g-3
ii libusb-1.0-0 2:1.0.18-2
ii lsb-base 4.1+Debian12
ii policykit-1 0.105-4
ii printer-driver-hpcups 3.14.1-1
ii python 2.7.5-5
ii python-dbus 1.2.0-2+b2
ii python-gobject-2 2.28.6-12+b1
ii python-imaging 2.3.0-2
ii python-pexpect 3.1-1
ii python-reportlab 3.0-1
ii wget 1.15-1
Versions of packages hplip recommends:
ii avahi-daemon 0.6.31-4
pn printer-driver-postscript-hp <none>
ii sane-utils 1.0.24-1.1+b1
Versions of packages hplip suggests:
pn hplip-doc <none>
ii hplip-gui 3.14.1-1
ii python-notify 0.1.1-3
ii system-config-printer 1.4.3-4
-- no debconf information
-- debsums errors found:
debsums: changed file /lib/udev/rules.d/56-hpmud.rules (from hplip package)
Cheers,
--
Cristian
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