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Bug 1362664 - sensors-detect triggers multiple errors if unsupported
Summary: sensors-detect triggers multiple errors if unsupported
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: lm_sensors
Version: 7.3
Hardware: All
OS: Linux
high
medium
Target Milestone: rc
: 7.3
Assignee: Martin Sehnoutka
QA Contact: Rachel Sibley
URL:
Whiteboard:
: 1371791 (view as bug list)
Depends On:
Blocks: 1230910 1364088 1752854
TreeView+ depends on / blocked
 
Reported: 2016-08-02 19:29 UTC by Rachel Sibley
Modified: 2019-09-17 12:27 UTC (History)
10 users (show)

Fixed In Version: lm_sensors-3.4.0-4.20160601gitf9185e5.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-11-04 06:39:11 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2016:2450 0 normal SHIPPED_LIVE lm_sensors bug fix update 2016-11-03 14:03:53 UTC

Description Rachel Sibley 2016-08-02 19:29:47 UTC 
Description of problem:

After running sensors-detect, I'm seeing the following errors printed on aarch64 HP Moonshot system:
- Use of uninitialized value in concatenation (.) or string at /usr/sbin/sensors-detect line 2880.
- modprobe: FATAL: Module cpuid not found. Failed to load module cpuid.
- /dev/port: No such file or directory
- Processor:  (//)

Version-Release number of selected component (if applicable):
~]# rpm -q lm_sensors
lm_sensors-3.4.0-2.20160601gitf9185e5.el7.aarch64

How reproducible:
Always

Steps to Reproduce:
1. sensors-detect
2.
3.

Actual results:
~]# sensors-detect
# sensors-detect revision $Revision$
# System: HP ProLiant m400 Server
# Kernel: 4.5.0-0.48.el7.aarch64 aarch64
Use of uninitialized value in concatenation (.) or string at /usr/sbin/sensors-detect line 2880.
Use of uninitialized value in concatenation (.) or string at /usr/sbin/sensors-detect line 2880.
Use of uninitialized value in concatenation (.) or string at /usr/sbin/sensors-detect line 2880.
Use of uninitialized value in concatenation (.) or string at /usr/sbin/sensors-detect line 2880.
# Processor:  (//)

This program will help you determine which kernel modules you need
to load to use lm_sensors most effectively. It is generally safe
and recommended to accept the default answers to all questions,
unless you know what you're doing.

Some south bridges, CPUs or memory controllers contain embedded sensors.
Do you want to scan for them? This is totally safe. (YES/no):    
modprobe: FATAL: Module cpuid not found.
Failed to load module cpuid.
Silicon Integrated Systems SIS5595...                       No
VIA VT82C686 Integrated Sensors...                          No
VIA VT8231 Integrated Sensors...                            No
AMD K8 thermal sensors...                                   No
AMD Family 10h thermal sensors...                           No
AMD Family 11h thermal sensors...                           No
AMD Family 12h and 14h thermal sensors...                   No
AMD Family 15h thermal sensors...                           No
AMD Family 16h thermal sensors...                           No
AMD Family 15h power sensors...                             No
AMD Family 16h power sensors...                             No
Intel digital thermal sensor...                             No
Intel AMB FB-DIMM thermal sensor...                         No
Intel 5500/5520/X58 thermal sensor...                       No
VIA C7 thermal sensor...                                    No
VIA Nano thermal sensor...                                  No

Some Super I/O chips contain embedded sensors. We have to write to
standard I/O ports to probe them. This is usually safe.
Do you want to scan for Super I/O sensors? (YES/no): 
/dev/port: No such file or directory

Some systems (mainly servers) implement IPMI, a set of common interfaces
through which system health data may be retrieved, amongst other things.
We first try to get the information from SMBIOS. If we don't find it
there, we have to read from arbitrary I/O ports to probe for such
interfaces. This is normally safe. Do you want to scan for IPMI
interfaces? (YES/no): 
Found `IPMI BMC KCS' at 0xca2...                            Success!
    (confidence 8, driver `to-be-written')

Some hardware monitoring chips are accessible through the ISA I/O ports.
We have to write to arbitrary I/O ports to probe them. This is usually
safe though. Yes, you do have ISA I/O ports even if you do not have any
ISA slots! Do you want to scan the ISA I/O ports? (YES/no): 
/dev/port: No such file or directory

Lastly, we can probe the I2C/SMBus adapters for connected hardware
monitoring devices. This is the most risky part, and while it works
reasonably well on most systems, it has been reported to cause trouble
on some systems.
Do you want to probe the I2C/SMBus adapters now? (YES/no): 
Sorry, no supported PCI bus adapters found.
Module i2c-dev loaded successfully.


Now follows a summary of the probes I have just done.
Just press ENTER to continue: 

Driver `to-be-written':
  * ISA bus, address 0xca2
    Chip `IPMI BMC KCS' (confidence: 8)

Note: there is no driver for IPMI BMC KCS yet.
Check http://www.lm-sensors.org/wiki/Devices for updates.

No modules to load, skipping modules configuration.

Unloading i2c-dev... OK


Expected results:
NO errors

Additional info:
Comment 2 Rachel Sibley 2016-08-03 15:02:39 UTC 
If sensors-detect is not supported maybe a usage message could be displayed ?
Comment 3 Al Stone 2016-08-23 22:04:46 UTC 
This is really just an FYI...

Since I was the one that added the patch to remove /dev/port from aarch64, I thought I would take a look at this bug.  It appears some porting is needed; I'm afraid perl is not a strong point for me, but the initial reported message is due to there being no CPU info to print out in the function print_cpu_info() in sensors-detect (i.e., that $cpu is undefined at line 2880).  The cpuid module is not found because it is specific to x86.  And /dev/port is not present because it makes little sense on aarch64 and has been removed.

Out of curiosity, I tried the Debian sid version of sensors-detect (also a 3.4.0 version, but claiming support for multiple architectures) and it was much more polite -- none of the above messages appeared, but no CPU info was printed either.  It does, however, use quite a few patches, at least three changing sensors-detect.  It looks like aarch64 ended up working better because of sone of the patches made to support ppc64; not knowing enough about this package or perl, though, I hesitate to suggest which patches if any may help.
Comment 5 Rachel Sibley 2016-08-25 12:56:53 UTC 
Much better ! The version details looks good and the 'Use of uninitialized value in concatenation (.) or string at /usr/sbin/sensors-detect line 2880' error is no longer displayed, it would be nice to also suppress the 'modprobe: FATAL: Module cpuid not found.Failed to load module cpuid.' and '/dev/port: No such file or directory' on the aarch64 arch, but at least now we are warned about the unsupported architecture.

[root@hp-moonshot-02-c10 ~]# rpm -q lm_sensors
lm_sensors-3.4.0-4.20160601gitf9185e5.el7.aarch64

[root@hp-moonshot-02-c10 ~]# sensors-detect
# sensors-detect revision 3.4.0-4 (2016-06-01)
# System: HPE ProLiant m400 Server
# Kernel: 4.5.0-3.el7.aarch64 aarch64
**********
Your processor's architecture is not yet supported. Beware that sensors-detect might not work properly!
**********

This program will help you determine which kernel modules you need
to load to use lm_sensors most effectively. It is generally safe
and recommended to accept the default answers to all questions,
unless you know what you're doing.

Some south bridges, CPUs or memory controllers contain embedded sensors.
Do you want to scan for them? This is totally safe. (YES/no): 
modprobe: FATAL: Module cpuid not found.
Failed to load module cpuid.
Silicon Integrated Systems SIS5595...                       No
VIA VT82C686 Integrated Sensors...                          No
VIA VT8231 Integrated Sensors...                            No
AMD K8 thermal sensors...                                   No
AMD Family 10h thermal sensors...                           No
AMD Family 11h thermal sensors...                           No
AMD Family 12h and 14h thermal sensors...                   No
AMD Family 15h thermal sensors...                           No
AMD Family 16h thermal sensors...                           No
AMD Family 15h power sensors...                             No
AMD Family 16h power sensors...                             No
Intel digital thermal sensor...                             No
Intel AMB FB-DIMM thermal sensor...                         No
Intel 5500/5520/X58 thermal sensor...                       No
VIA C7 thermal sensor...                                    No
VIA Nano thermal sensor...                                  No

Some Super I/O chips contain embedded sensors. We have to write to
standard I/O ports to probe them. This is usually safe.
Do you want to scan for Super I/O sensors? (YES/no): 
/dev/port: No such file or directory

Some systems (mainly servers) implement IPMI, a set of common interfaces
through which system health data may be retrieved, amongst other things.
We first try to get the information from SMBIOS. If we don't find it
there, we have to read from arbitrary I/O ports to probe for such
interfaces. This is normally safe. Do you want to scan for IPMI
interfaces? (YES/no): 
Found `IPMI BMC KCS' at 0xca2...                            Success!
    (confidence 8, driver `to-be-written')

Some hardware monitoring chips are accessible through the ISA I/O ports.
We have to write to arbitrary I/O ports to probe them. This is usually
safe though. Yes, you do have ISA I/O ports even if you do not have any
ISA slots! Do you want to scan the ISA I/O ports? (YES/no): 
/dev/port: No such file or directory

Lastly, we can probe the I2C/SMBus adapters for connected hardware
monitoring devices. This is the most risky part, and while it works
reasonably well on most systems, it has been reported to cause trouble
on some systems.
Do you want to probe the I2C/SMBus adapters now? (YES/no): 
Sorry, no supported PCI bus adapters found.
Module i2c-dev loaded successfully.


Now follows a summary of the probes I have just done.
Just press ENTER to continue: 

Driver `to-be-written':
  * ISA bus, address 0xca2
    Chip `IPMI BMC KCS' (confidence: 8)

Note: there is no driver for IPMI BMC KCS yet.
Check http://www.lm-sensors.org/wiki/Devices for updates.

No modules to load, skipping modules configuration.

Unloading i2c-dev... OK
Comment 8 Martin Sehnoutka 2016-08-31 07:58:24 UTC 
*** Bug 1371791 has been marked as a duplicate of this bug. ***
Comment 11 Rachel Sibley 2016-09-07 16:37:51 UTC 
Verified as fixed, using an unsupported arch, a warning message is now displayed, no longer seeing 'Use of uninitialized value in concatenation (.) or string at /usr/sbin/sensors-detect line 2880.' However I am seeing a regression on supported systems, I will file a new bug to track.

[root@hp-moonshot-03-c12 ~]# sensors-detect
# sensors-detect revision 3.4.0-4 (2016-06-01)
# System: HPE ProLiant m400 Server
# Kernel: 4.5.0-8.el7.aarch64 aarch64
**********
Your processor's architecture is not yet supported. Beware that sensors-detect might not work properly!
**********

This program will help you determine which kernel modules you need
to load to use lm_sensors most effectively. It is generally safe
and recommended to accept the default answers to all questions,
unless you know what you're doing.

Some south bridges, CPUs or memory controllers contain embedded sensors.
Do you want to scan for them? This is totally safe. (YES/no): 
modprobe: FATAL: Module cpuid not found.
Failed to load module cpuid.
Silicon Integrated Systems SIS5595...                       No
VIA VT82C686 Integrated Sensors...                          No
VIA VT8231 Integrated Sensors...                            No
AMD K8 thermal sensors...                                   No
AMD Family 10h thermal sensors...                           No
AMD Family 11h thermal sensors...                           No
AMD Family 12h and 14h thermal sensors...                   No
AMD Family 15h thermal sensors...                           No
AMD Family 16h thermal sensors...                           No
AMD Family 15h power sensors...                             No
AMD Family 16h power sensors...                             No
Intel digital thermal sensor...                             No
Intel AMB FB-DIMM thermal sensor...                         No
Intel 5500/5520/X58 thermal sensor...                       No
VIA C7 thermal sensor...                                    No
VIA Nano thermal sensor...                                  No

Some Super I/O chips contain embedded sensors. We have to write to
standard I/O ports to probe them. This is usually safe.
Do you want to scan for Super I/O sensors? (YES/no): 
/dev/port: No such file or directory

Some systems (mainly servers) implement IPMI, a set of common interfaces
through which system health data may be retrieved, amongst other things.
We first try to get the information from SMBIOS. If we don't find it
there, we have to read from arbitrary I/O ports to probe for such
interfaces. This is normally safe. Do you want to scan for IPMI
interfaces? (YES/no): 
Found `IPMI BMC KCS' at 0xca2...                            Success!
    (confidence 8, driver `to-be-written')

Some hardware monitoring chips are accessible through the ISA I/O ports.
We have to write to arbitrary I/O ports to probe them. This is usually
safe though. Yes, you do have ISA I/O ports even if you do not have any
ISA slots! Do you want to scan the ISA I/O ports? (YES/no): 
/dev/port: No such file or directory

Lastly, we can probe the I2C/SMBus adapters for connected hardware
monitoring devices. This is the most risky part, and while it works
reasonably well on most systems, it has been reported to cause trouble
on some systems.
Do you want to probe the I2C/SMBus adapters now? (YES/no): 
Sorry, no supported PCI bus adapters found.
Module i2c-dev loaded successfully.


Now follows a summary of the probes I have just done.
Just press ENTER to continue: 

Driver `to-be-written':
  * ISA bus, address 0xca2
    Chip `IPMI BMC KCS' (confidence: 8)

Note: there is no driver for IPMI BMC KCS yet.
Check http://www.lm-sensors.org/wiki/Devices for updates.

No modules to load, skipping modules configuration.

Unloading i2c-dev... OK
Comment 12 IBM Bug Proxy 2016-09-19 11:10:44 UTC 
------- Comment From pavsubra.com 2016-09-19 07:04 EDT-------
I have installed RHEL 7.3 LE Snapshot3 build and again executed the test.

[root@ltc-garri5 ~]# uname -a
Linux ltc-garri5.aus.stglabs.ibm.com 3.10.0-505.el7.ppc64le #1 SMP Tue Sep 6 11:09:32 EDT 2016 ppc64le ppc64le ppc64le GNU/Linux
[root@ltc-garri5 ~]# cat /etc/os-release
NAME="Red Hat Enterprise Linux Server"
VERSION="7.3 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="7.3"
PRETTY_NAME="Red Hat Enterprise Linux Server 7.3 Beta (Maipo)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:7.3:beta:server"
HOME_URL="https://www.redhat.com/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_BUGZILLA_PRODUCT_VERSION=7.3
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="7.3 Beta"

[root@ltc-garri5 ~]# update_flash -d

Firmware version:
Product Name          : OpenPOWER Firmware
Product Version       : IBM-garrison-ibm-OP8_v1.10_2.17
Product Extra         :        op-build-b4e013a
Product Extra         :        buildroot-81b8d98
Product Extra         :        skiboot-5.3.3
Product Extra         :        hostboot-1f6784d-113d2bd
Product Extra         :        linux-4.4.16-openpower1-a515412
Product Extra         :        petitboot-v1.2.4-7e6637c
Product Extra         :        garrison-xml-3db7b6e
Product Extra         :        occ-69fb587
Product Extra         :        hostboot-bina

[root@ltc-garri5 ~]# cat /proc/cpuinfo | tail
processor       : 159
cpu             : POWER8NVL (raw), altivec supported
clock           : 4023.000000MHz
revision        : 1.0 (pvr 004c 0100)

timebase        : 512000000
platform        : PowerNV
model           : 8335-GTB
machine         : PowerNV 8335-GTB
firmware        : OPAL v3

[root@ltc-garri5 ~]# which sensors-detect
/usr/sbin/sensors-detect
[root@ltc-garri5 ~]# rpm -qf /usr/sbin/sensors-detect
lm_sensors-3.4.0-4.20160601gitf9185e5.el7.ppc64le

------- Comment From pavsubra.com 2016-09-19 07:06 EDT-------
[root@ltc-garri5 ~]# sensors-detect
# DMI data unavailable, please consider installing dmidecode 2.7
# or later for better results.
# Kernel: 3.10.0-505.el7.ppc64le ppc64le

Do you want to scan for them? This is totally safe. (YES/no): YES
mmap: Invalid argument

Do you want to scan for Super I/O sensors? (YES/no): YES
Probing for Super-I/O at 0x2e/0x2f
Trying family `National Semiconductor/ITE'...               Yes
Found unknown chip with ID 0x6060
Probing for Super-I/O at 0x4e/0x4f
Trying family `National Semiconductor/ITE'...               Yes
Found unknown chip with ID 0x6060

interfaces? (YES/no): YES
Probing for `IPMI BMC KCS' at 0xca0...                      Success!
(confidence 4, driver `to-be-written')
Probing for `IPMI BMC SMIC' at 0xca8...                     Success!
(confidence 4, driver `to-be-written')

ISA slots! Do you want to scan the ISA I/O ports? (YES/no): YES
Probing for `National Semiconductor LM78' at 0x290...       No
Probing for `National Semiconductor LM79' at 0x290...       No
Probing for `Winbond W83781D' at 0x290...                   No
Probing for `Winbond W83782D' at 0x290...                   No

Do you want to probe the I2C/SMBus adapters now? (YES/no): YES

As can be seen the above command execution doesn't show the original uninitialized messages.
So, the issue is fixed and the bug is resolved and verified.
Comment 14 errata-xmlrpc 2016-11-04 06:39:11 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2450.html
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