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Description of problem:
Segmentation fault after performing lvconvert --thinpool vg/thick


Version-Release number of selected component (if applicable):
lvm2-2.02.97-1.el7.x86_64

How reproducible:


Steps to Reproduce:
1.lvcreate -l10 -n vg/thick
2.lvconvert --thinpool vg/thick -vvvv
attaching the debug log.
  
Actual results:
Segmentation fault (core dumped)

# lvs -a vg
  LV            VG   Attr     LSize  Pool Origin Data%  Move Log Copy%  Convert
  [thick_tdata] vg   Twi---t- 40.00m                                           
  [thick_tmeta] vg   twi---t- 40.00m   

# dmesg
>>>
[66842.263751] lvconvert[4058]: segfault at 7fff24467fd8 ip 0000003340a46b7b sp 00007fff24467fe0 error 6 in libc-2.16.so[3340a00000+1ad000]
>>>

Expected results:


Additional info:

I also hit it on fedora 18 alpha.

attaching the lvconvert -vvvv log file.

=== backtrace ===
Core was generated by `lvconvert --thinpool vg/thick'.
Program terminated with signal 11, Segmentation fault.
#0  0x000000000045e808 in print_log ()
Missing separate debuginfos, use: debuginfo-install lvm2-2.02.97-1.fc18.x86_64
(gdb) bt
#0  0x000000000045e808 in print_log ()
#1  0x0000003eaac29306 in dm_task_run () from /lib64/libdevmapper.so.1.02
#2  0x0000000000495d04 in ?? ()
#3  0x0000000000495eb5 in ?? ()
#4  0x0000000000496a49 in ?? ()
#5  0x0000000000496d35 in ?? ()
#6  0x0000000000496f9d in ?? ()
#7  0x0000000000496f9d in ?? ()
#8  0x0000000000496f9d in ?? ()
#9  0x0000000000496f9d in ?? ()
#10 0x0000000000496f9d in ?? ()
#11 0x0000000000496f9d in ?? ()
#12 0x0000000000496f9d in ?? ()
#13 0x0000000000496f9d in ?? ()
#14 0x0000000000496f9d in ?? ()
#15 0x0000000000496f9d in ?? ()

Created attachment 617939 [details]
lvconvert.log

*** This bug has been marked as a duplicate of bug 858874 ***