Bug 1047376

Summary: blkid hangs while reading from /dev/fd0
Product: Red Hat Enterprise Linux 7 Reporter: Berkley Shands <bshands>
Component: util-linuxAssignee: Karel Zak <kzak>
Status: CLOSED CURRENTRELEASE QA Contact: Leos Pol <lpol>
Severity: high Docs Contact:
Priority: high    
Version: 7.0CC: jbastian, jscotka, ksrot, kzak, lpol, mvadkert, pholica, rpacheco, walters
Target Milestone: rcKeywords: Regression
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: util-linux-2.23.2-16.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-06-13 11:08:56 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 717785, 1080727    
Attachments:
Description Flags
blkid_debug
none
partitions none

Description Berkley Shands 2013-12-30 19:10:02 UTC 
Description of problem:
Installing on an old SuperMicro H8DCE 2-socket AMD 940 motherboard
With ForcedEth ethernet, floppy controller enabled, but *NO* floppy
powered. Late stage install of boot block fails with grub2-install step hanging
attempting to access the floppy FD0, which in this case, does not exist.
The retry does not time out even after 30 minutes.


Version-Release number of selected component (if applicable):


How reproducible:

Install general workstation development on old AMD socket 940 motherboard.
Leave the floppy drive unpowered.


Steps to Reproduce:
1.
2.
3.

Actual results:

Hang in grub2- step trying for a floppy. <Alt><F4>
 shows grub2 step, and scrolling FD0 errors.

Expected results:

A grub2 boot block

Additional info:

Yeah, its old and in the way, but it didn't cost much :-)
The forcedeth is not a valid ethernet device either (also no big deal).
Comment 2 Pavel Holica 2014-03-17 12:10:34 UTC 
I was able to reproduce the issue, and it was caused by blkid which is run inside os /bin/os-prober in function partitions.

Changing component to util-linux. blkid was from: util-linux-2.23.2-14.el7
Comment 5 Leos Pol 2014-03-18 14:15:46 UTC 
Any progress with this?
Comment 6 Karel Zak 2014-03-18 14:54:57 UTC 
It would be nice to have /proc/partitions from the machine. libblkid should not read fd0 by default at all. It would be also nice to have output from

 LIBBLKID_DEBUG=0xffff blkid
Comment 7 Pavel Holica 2014-03-18 15:54:08 UTC 
Created attachment 876011 [details]
blkid_debug
Comment 8 Pavel Holica 2014-03-18 15:54:11 UTC 
Created attachment 876012 [details]
partitions
Comment 9 Karel Zak 2014-03-19 09:28:47 UTC 
Hmm... it seems that we're affected by stupid kernel regression (which will not be fixed...), see

  https://groups.google.com/forum/#!topic/linux.kernel/uj-jvmwn9yg

where kernel displays removable media in /proc/partitions now.

It will be probably necessary to add an extra filter to libblkid to ignore by default the floppies.
Comment 10 Karel Zak 2014-03-20 09:38:56 UTC 
The another story are mess in return codes in the library. It should be fixed together with the floppy problem.
Comment 11 Karel Zak 2014-03-20 10:28:14 UTC 
Note that there is also kernel solution, see bug #1078786.
Comment 12 Karel Zak 2014-03-24 10:40:25 UTC 
Fixed by upstream commits 296d96e20e565e497e9510e6ac9b71e0a0ca447d and 37f4060225df0591ab8e1dd676dbc8115d900d4f.
Comment 17 Karel Zak 2014-03-28 13:38:24 UTC 
*** Bug 1081567 has been marked as a duplicate of this bug. ***
Comment 20 Miroslav Vadkerti 2014-04-01 08:09:20 UTC 
*** Bug 1082961 has been marked as a duplicate of this bug. ***
Comment 23 Ludek Smid 2014-06-13 11:08:56 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.