[Bug 1221967] Re: Segfault on rebuild

Cedric Kimaru launchpad at ckimaru.com
Sat Jan 11 10:50:38 UTC 2014 

seeing this as well on 12.04

root at amilet:/home/myubuntu# dmraid -R isw_bffghfhhej_RAID5_3Disks /dev/sdc
ERROR: isw: wrong number of devices in RAID set "isw_bffghfhhej_RAID5_3Disks" [2/3] on /dev/sdd
ERROR: isw: wrong number of devices in RAID set "isw_bffghfhhej_RAID5_3Disks" [2/3] on /dev/sdb
Segmentation fault (core dumped)

root at amilet:/home/myubuntu# dmesg 
[  692.512042] show_signal_msg: 48 callbacks suppressed
[  692.512047] dmraid[3909]: segfault at 0 ip b775ecc9 sp bfdfe720 error 4 in libdmraid.so.1.0.0.rc16[b7747000+35000]

root at amilet:/home/myubuntu# lsb_release -rd
Description:	Ubuntu 12.04.3 LTS
Release:	12.04

However, adding debug and verbose doesn't result in the core but raid
still doesn't rebuild ;(

root at amilet:/home/myubuntu# dmraid -d -v -R isw_bffghfhhej_RAID5_3Disks /dev/sdc
DEBUG: not isw at 721419264
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at 720337408
DEBUG: not isw at -1024
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1082880
DEBUG: not isw at -1024
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1082880
DEBUG: not isw at -2105541632
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -2106623488
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: not isw at -522494976
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -523576832
DEBUG: not isw at -522494976
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -523576832
DEBUG: not isw at -1055826944
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -1056908800
DEBUG: isw metadata found at -522494976 from probe at 232

DEBUG: not isw at -522494976
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at -523576832
DEBUG: isw metadata found at -522494976 from probe at 232

DEBUG: not isw at 1891654656
DEBUG: isw trying hard coded -2115 offset.
DEBUG: not isw at 1890572800
DEBUG: _find_set: searching /dev/sdc
DEBUG: _find_set: not found /dev/sdc
DEBUG: _find_set: searching isw_bffghfhhej
DEBUG: _find_set: not found isw_bffghfhhej
DEBUG: _find_set: searching isw_bffghfhhej_RAID5_3Disks
DEBUG: _find_set: searching isw_bffghfhhej_RAID5_3Disks
DEBUG: _find_set: not found isw_bffghfhhej_RAID5_3Disks
DEBUG: _find_set: not found isw_bffghfhhej_RAID5_3Disks
DEBUG: freeing devices of RAID set "isw_bffghfhhej_RAID5_3Disks"
DEBUG: freeing device "isw_bffghfhhej_RAID5_3Disks", path "/dev/sdd"
DEBUG: freeing devices of RAID set "isw_bffghfhhej"
DEBUG: freeing device "isw_bffghfhhej", path "/dev/sdd"
DEBUG: _find_set: searching isw_bffghfhhej
DEBUG: _find_set: not found isw_bffghfhhej
DEBUG: _find_set: searching isw_bffghfhhej_RAID5_3Disks
DEBUG: _find_set: searching isw_bffghfhhej_RAID5_3Disks
DEBUG: _find_set: not found isw_bffghfhhej_RAID5_3Disks
DEBUG: _find_set: not found isw_bffghfhhej_RAID5_3Disks
DEBUG: freeing devices of RAID set "isw_bffghfhhej_RAID5_3Disks"
DEBUG: freeing device "isw_bffghfhhej_RAID5_3Disks", path "/dev/sdb"
DEBUG: freeing devices of RAID set "isw_bffghfhhej"
DEBUG: freeing device "isw_bffghfhhej", path "/dev/sdb"
ERROR: either the required RAID set not found or more options required
no raid sets and with names: "/dev/sdc"

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https://bugs.launchpad.net/bugs/1221967

Title:
  Segfault on rebuild

Status in “dmraid” package in Ubuntu:
  New

Bug description:
  
  Hi, 
  I have a 4 disk RAID5 array with a failed disk. I removed the bad disk and inserted a new disk. However, when I try to rebuild with the new disk, dmraid crashes.  (See details below.)

  I read elsewhere that ntfs may cause problems?  I have two ntfs
  partitions. Can this be part of the problem? I need  to rebuild my
  array before I loose another disk!  (Of course, I'm backed up.... but
  still..... :-)

  Thanks for any help!

  # dmraid -f isw -R isw_chifcdfhf /dev/sdc
  ERROR: isw: wrong number of devices in RAID set "isw_chifcdfhf_RAID5" [3/4] on /dev/sdd
  ERROR: isw: wrong number of devices in RAID set "isw_chifcdfhf_RAID5" [3/4] on /dev/sde
  ERROR: isw: wrong number of devices in RAID set "isw_chifcdfhf_RAID5" [3/4] on /dev/sdf
  Segmentation fault (core dumped)

  # dmraid -r
  *** Group superset isw_chifcdfhf
  --> *Inconsistent* Active Subset
  name   : isw_chifcdfhf_RAID5
  size   : 3907041280
  stride : 256
  type   : raid5_la
  status : inconsistent
  subsets: 0
  devs   : 3
  spares : 0

  # dmraid -s 
  /dev/sdf: isw, "isw_chifcdfhf", GROUP, ok, 1953525166 sectors, data@ 0
  /dev/sde: isw, "isw_chifcdfhf", GROUP, ok, 1953525166 sectors, data@ 0
  /dev/sdd: isw, "isw_chifcdfhf", GROUP, ok, 1953525166 sectors, data@ 0

  # # df -T | grep mapper
  /dev/mapper/isw_chifcdfhf_RAID5p5 fuseblk  2804317180 884804828 1919512352  32% /mnt/data
  /dev/mapper/isw_chifcdfhf_RAID5p2 fuseblk    10485752   4082644    6403108  39% /mnt/share
  /dev/mapper/isw_chifcdfhf_RAID5p3 ext4       10321208   3007356    6789564  31% /var
  /dev/mapper/isw_chifcdfhf_RAID5p4 ext4      103212320  75764656   22204784  78% /home

  # lsb_release -rd
  Description:	Ubuntu 12.04.2 LTS
  Release:	12.04

  # apt-cache policy dmraid
  dmraid:
    Installed: 1.0.0.rc16-4.1ubuntu8
    Candidate: 1.0.0.rc16-4.1ubuntu8

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