Bug#736173: lvextend segfault

[Ian Jackson]

Here's that *display output I promised.

I have the system where this occurs ready and waiting for debugging
steps.  If I don't get useful suggestions here I may get out a
debugger :-).

BTW I'm aware of #561931 but (a) that's very old and (b) supplying the
pv name doesn't help:

root at gall-mite:~# lvextend -i1 -l +5492 /dev/gall-mite/root /dev/sdb
  Extending logical volume root to 453.52 GiB
  Segmentation fault

Thanks,
Ian.

root at gall-mite:~# lvdisplay -a
  --- Logical volume ---
  LV Path                /dev/gall-mite/root
  LV Name                root
  VG Name                gall-mite
  LV UUID                ieotHT-FTgL-3WX2-4Vlq-BVRq-GLNB-yoE7Uh
  LV Write Access        read/write
  LV Creation host, time gall-mite, 2014-01-20 17:34:34 +0000
  LV Status              available
  # open                 1
  LV Size                432.06 GiB
  Current LE             110608
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     512
  Block device           254:0
   
  --- Logical volume ---
  LV Path                /dev/gall-mite/swap_1
  LV Name                swap_1
  VG Name                gall-mite
  LV UUID                h1s6rg-WgvL-MceO-QEmU-TwKj-zOwa-twWTtF
  LV Write Access        read/write
  LV Creation host, time gall-mite, 2014-01-20 17:34:34 +0000
  LV Status              available
  # open                 2
  LV Size                1.86 GiB
  Current LE             476
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:1
   
  --- Logical volume ---
  LV Path                /dev/gall-mite/swap_osstest_build
  LV Name                swap_osstest_build
  VG Name                gall-mite
  LV UUID                nuzgsT-yToV-ERtT-qvwH-l0Lt-cuZA-yQfjLg
  LV Write Access        read/write
  LV Creation host, time gall-mite, 2014-01-20 17:46:10 +0000
  LV Status              available
  # open                 2
  LV Size                10.00 GiB
  Current LE             2560
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:2
   
root at gall-mite:~# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda5
  VG Name               gall-mite
  PV Size               232.55 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              59532
  Free PE               0
  Allocated PE          59532
  PV UUID               MMfWnJ-G0PD-oHFD-T8Jc-7W8f-76El-9qfOHS
   
  --- Physical volume ---
  PV Name               /dev/sdb
  VG Name               gall-mite
  PV Size               232.83 GiB / not usable 2.58 MiB
  Allocatable           yes 
  PE Size               4.00 MiB
  Total PE              59604
  Free PE               5492
  Allocated PE          54112
  PV UUID               UV94be-oNne-I5n8-FL3U-FxVI-kbSp-AQpMsM
   
root at gall-mite:~# vgdisplay 
  --- Volume group ---
  VG Name               gall-mite
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  9
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               3
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               465.38 GiB
  PE Size               4.00 MiB
  Total PE              119136
  Alloc PE / Size       113644 / 443.92 GiB
  Free  PE / Size       5492 / 21.45 GiB
  VG UUID               G7KYvx-Al7G-tob3-nZY6-IFXs-IAR3-7UVYoK
   
root at gall-mite:~#