Bug 1445987

Summary: RAID TAKEOVER: lvconvert segfault in _raid_add_target_line
Product: Red Hat Enterprise Linux 7 Reporter: Corey Marthaler <cmarthal>
Component: lvm2Assignee: Heinz Mauelshagen <heinzm>
lvm2 sub component: Mirroring and RAID QA Contact: cluster-qe <cluster-qe>
Status: CLOSED CURRENTRELEASE Docs Contact:
Severity: medium    
Priority: unspecified CC: agk, cmarthal, heinzm, jbrassow, msnitzer, prajnoha, prockai, teigland, zkabelac
Version: 7.4   
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-05-26 14:30:46 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:
Attachments:
Description Flags
verbose lvconvert attempt none

Description Corey Marthaler 2017-04-26 22:48:45 UTC 
Description of problem:
This is the issue in https://bugzilla.redhat.com/show_bug.cgi?id=1441334#c6 that appears to be an unrelated bug.



Scenario raid0: Convert Striped raid0 volume
********* Take over hash info for this scenario *********
* from type:    raid0
* to type:      raid4
* from legs:    2
* to legs:      2
* from region:  0
* to region:    2048.00k
* contiguous:   1
* snapshot:     0
******************************************************

Creating original volume on host-073...
host-073: lvcreate  --type raid0  -i 2 -n takeover -L 4G centipede2
Waiting until all mirror|raid volumes become fully syncd...
   1/1 mirror(s) are fully synced: ( 100.00% )
Sleeping 15 sec

Current volume device structure:
  LV                  Attr       LSize   Cpy%Sync Devices                                  
  takeover            rwi-a-r---   4.00g          takeover_rimage_0(0),takeover_rimage_1(0)
  [takeover_rimage_0] iwi-aor---   2.00g          /dev/sde1(0)                             
  [takeover_rimage_1] iwi-aor---   2.00g          /dev/sdf1(0)                             


Creating xfs on top of mirror(s) on host-073...
Mounting mirrored xfs filesystems on host-073...

TAKEOVER (with verbose): lvconvert --yes -R 2048.00k  --type raid4 centipede2/takeover
sh: line 1: 26654 Segmentation fault      (core dumped) lvconvert -vvvv --yes -R 2048.00k --type raid4 centipede2/takeover > /tmp/lvconvert.18843 2>&1



Core was generated by `lvconvert -vvvv --yes -R 2048.00k --type raid4 centipede2/takeover'.
Program terminated with signal 11, Segmentation fault.
#0  0x000055c2995f88bd in _raid_add_target_line (dm=0x55c29b1522f0, mem=<optimized out>, cmd=<optimized out>, target_state=<optimized out>, seg=0x55c29b127550, laopts=<optimized out>, 
    node=0x55c29b0ad928, len=8388608, pvmove_mirror_count=0x55c29b152308) at raid/raid.c:275
275                             uint64_t status = seg_lv(seg, s)->status;
Missing separate debuginfos, use: debuginfo-install bzip2-libs-1.0.6-13.el7.x86_64 elfutils-libelf-0.168-5.el7.x86_64 elfutils-libs-0.168-5.el7.x86_64 glibc-2.17-192.el7.x86_64 libattr-2.4.46-12.el7.x86_64 libblkid-2.23.2-39.el7.x86_64 libcap-2.22-9.el7.x86_64 libgcc-4.8.5-14.el7.x86_64 libselinux-2.5-11.el7.x86_64 libsepol-2.5-6.el7.x86_64 libuuid-2.23.2-39.el7.x86_64 ncurses-libs-5.9-13.20130511.el7.x86_64 pcre-8.32-17.el7.x86_64 readline-6.2-10.el7.x86_64 systemd-libs-219-35.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-17.el7.x86_64
(gdb) bt
#0  0x000055c2995f88bd in _raid_add_target_line (dm=0x55c29b1522f0, mem=<optimized out>, cmd=<optimized out>, target_state=<optimized out>, seg=0x55c29b127550, laopts=<optimized out>, 
    node=0x55c29b0ad928, len=8388608, pvmove_mirror_count=0x55c29b152308) at raid/raid.c:275
#1  0x000055c2995ff200 in _add_target_to_dtree (dm=<optimized out>, dnode=<optimized out>, seg=<optimized out>, laopts=<optimized out>) at activate/dev_manager.c:2512
#2  0x000055c299602153 in _add_segment_to_dtree (layer=0x0, laopts=<optimized out>, seg=<optimized out>, dnode=0x55c29b0ad928, dtree=0x55c29b0ad6f0, dm=0x55c29b1522f0)
    at activate/dev_manager.c:2710
#3  _add_new_lv_to_dtree (dm=dm@entry=0x55c29b1522f0, dtree=dtree@entry=0x55c29b0ad6f0, lv=lv@entry=0x55c29b1270e0, laopts=laopts@entry=0x7ffd4157fe80, layer=0x0)
    at activate/dev_manager.c:2899
#4  0x000055c299603637 in _tree_action (dm=dm@entry=0x55c29b1522f0, lv=lv@entry=0x55c29b1270e0, laopts=laopts@entry=0x7ffd4157fe80, action=action@entry=PRELOAD)
    at activate/dev_manager.c:3147
#5  0x000055c299605d36 in dev_manager_preload (dm=dm@entry=0x55c29b1522f0, lv=lv@entry=0x55c29b1270e0, laopts=laopts@entry=0x7ffd4157fe80, 
    flush_required=flush_required@entry=0x7ffd4157fe2c) at activate/dev_manager.c:3210
#6  0x000055c29955caf4 in _lv_preload (lv=lv@entry=0x55c29b1270e0, laopts=laopts@entry=0x7ffd4157fe80, flush_required=flush_required@entry=0x7ffd4157fe2c) at activate/activate.c:1414
#7  0x000055c29956166d in _lv_suspend (error_if_not_suspended=0, lv_pre=0x55c29b1270e0, lv=0x55c29b13b100, laopts=0x7ffd4157fe80, 
    lvid_s=0x7ffd41580fa0 "0LFnCknKYd4plqZOBOIlVLoz5TSyGSEP5JQsqnZhuevg7SYOFxZQcMgOgjsmuycg", cmd=0x55c29b067020) at activate/activate.c:2152
#8  lv_suspend_if_active (cmd=cmd@entry=0x55c29b067020, lvid_s=lvid_s@entry=0x7ffd41580fa0 "0LFnCknKYd4plqZOBOIlVLoz5TSyGSEP5JQsqnZhuevg7SYOFxZQcMgOgjsmuycg", 
    origin_only=origin_only@entry=0, exclusive=exclusive@entry=0, lv=<optimized out>, lv_pre=<optimized out>) at activate/activate.c:2265
#9  0x000055c29961743d in _file_lock_resource (cmd=0x55c29b067020, resource=0x7ffd41580fa0 "0LFnCknKYd4plqZOBOIlVLoz5TSyGSEP5JQsqnZhuevg7SYOFxZQcMgOgjsmuycg", flags=60, 
    lv=<optimized out>) at locking/file_locking.c:114
#10 0x000055c299592888 in _lock_vol (cmd=cmd@entry=0x55c29b067020, resource=<optimized out>, 
    resource@entry=0x7ffd41580fa0 "0LFnCknKYd4plqZOBOIlVLoz5TSyGSEP5JQsqnZhuevg7SYOFxZQcMgOgjsmuycg", flags=flags@entry=60, lv_op=lv_op@entry=LV_SUSPEND, lv=lv@entry=0x55c29b1270e0)
    at locking/locking.c:275
#11 0x000055c2995931d3 in lock_vol (cmd=0x55c29b067020, vol=<optimized out>, vol@entry=0x55c29b1270e0 "0LFnCknKYd4plqZOBOIlVLoz5TSyGSEP5JQsqnZhuevg7SYOFxZQcMgOgjsmuycg", flags=60, 
    lv=lv@entry=0x55c29b1270e0) at locking/locking.c:355
#12 0x000055c29959d17c in _lv_update_and_reload (lv=lv@entry=0x55c29b1270e0, origin_only=origin_only@entry=0) at metadata/lv_manip.c:6371
#13 0x000055c2995a5757 in lv_update_and_reload (lv=lv@entry=0x55c29b1270e0) at metadata/lv_manip.c:6397
#14 0x000055c2995d30b4 in _lv_update_reload_fns_reset_eliminate_lvs (lv=lv@entry=0x55c29b1270e0, origin_only=0, origin_only=0) at metadata/raid_manip.c:567
#15 0x000055c2995d6dfb in _takeover_upconvert_wrapper (lv=0x55c29b1270e0, new_segtype=0x55c29b0a5590, new_image_count=<optimized out>, new_data_copies=2, new_stripe_size=128, 
    new_region_size=4096, allocate_pvs=0x55c29b126378, force=<optimized out>, yes=<optimized out>, new_stripes=0) at metadata/raid_manip.c:5195
#16 0x000055c2995d9f63 in lv_raid_convert (lv=lv@entry=0x55c29b1270e0, new_segtype=0x55c29b0a5590, yes=1, force=0, new_stripes=0, new_stripe_size_supplied=<optimized out>, 
    new_stripe_size=128, new_region_size=4096, allocate_pvs=0x55c29b126378) at metadata/raid_manip.c:6072
#17 0x000055c29952515d in _lvconvert_raid (lv=lv@entry=0x55c29b1270e0, lp=lp@entry=0x7ffd41581940) at lvconvert.c:1401
#18 0x000055c299526f5c in _convert_striped_raid (cmd=<optimized out>, lp=0x7ffd41581940, lv=0x55c29b1270e0) at lvconvert.c:1609
#19 _convert_striped (lp=<optimized out>, lv=<optimized out>, cmd=<optimized out>) at lvconvert.c:1676
#20 _lvconvert_raid_types (cmd=cmd@entry=0x55c29b067020, lv=lv@entry=0x55c29b1270e0, lp=lp@entry=0x7ffd41581940) at lvconvert.c:1749
#21 0x000055c29952717a in _lvconvert_raid_types_single (cmd=cmd@entry=0x55c29b067020, lv=0x55c29b1270e0, handle=handle@entry=0x55c29b0b45e8) at lvconvert.c:4241
#22 0x000055c29954bc38 in process_each_lv_in_vg (cmd=cmd@entry=0x55c29b067020, vg=vg@entry=0x55c29b1262a0, arg_lvnames=arg_lvnames@entry=0x7ffd41581820, 
---Type <return> to continue, or q <return> to quit---
    tags_in=tags_in@entry=0x7ffd415817d0, stop_on_error=stop_on_error@entry=0, handle=handle@entry=0x55c29b0b45e8, 
    check_single_lv=check_single_lv@entry=0x55c299521230 <_lvconvert_raid_types_check>, process_single_lv=process_single_lv@entry=0x55c299527100 <_lvconvert_raid_types_single>)
    at toollib.c:3134
#23 0x000055c29954d084 in _process_lv_vgnameid_list (process_single_lv=0x55c299527100 <_lvconvert_raid_types_single>, check_single_lv=0x55c299521230 <_lvconvert_raid_types_check>, 
    handle=0x55c29b0b45e8, arg_tags=0x7ffd415817d0, arg_lvnames=0x7ffd415817f0, arg_vgnames=0x7ffd415817e0, vgnameids_to_process=0x7ffd41581810, read_flags=1048576, cmd=0x55c29b067020)
    at toollib.c:3629
#24 process_each_lv (cmd=cmd@entry=0x55c29b067020, argc=argc@entry=1, argv=<optimized out>, one_vgname=one_vgname@entry=0x0, one_lvname=one_lvname@entry=0x0, 
    read_flags=read_flags@entry=1048576, handle=handle@entry=0x55c29b0b45e8, check_single_lv=check_single_lv@entry=0x55c299521230 <_lvconvert_raid_types_check>, 
    process_single_lv=process_single_lv@entry=0x55c299527100 <_lvconvert_raid_types_single>) at toollib.c:3781
#25 0x000055c2995293b8 in lvconvert_raid_types_cmd (cmd=0x55c29b067020, argc=<optimized out>, argv=<optimized out>) at lvconvert.c:4328
#26 0x000055c2995350c8 in lvm_run_command (cmd=cmd@entry=0x55c29b067020, argc=1, argc@entry=8, argv=0x7ffd41581e10, argv@entry=0x7ffd41581dd8) at lvmcmdline.c:2925
#27 0x000055c299535db3 in lvm2_main (argc=8, argv=0x7ffd41581dd8) at lvmcmdline.c:3454
#28 0x00007fbc5ec02c05 in __libc_start_main () from /lib64/libc.so.6
#29 0x000055c299514e8e in _start ()



Version-Release number of selected component (if applicable):
3.10.0-651.el7.x86_64

lvm2-2.02.170-2.el7    BUILT: Thu Apr 13 14:37:43 CDT 2017
lvm2-libs-2.02.170-2.el7    BUILT: Thu Apr 13 14:37:43 CDT 2017
lvm2-cluster-2.02.170-2.el7    BUILT: Thu Apr 13 14:37:43 CDT 2017
device-mapper-1.02.139-2.el7    BUILT: Thu Apr 13 14:37:43 CDT 2017
device-mapper-libs-1.02.139-2.el7    BUILT: Thu Apr 13 14:37:43 CDT 2017
device-mapper-event-1.02.139-2.el7    BUILT: Thu Apr 13 14:37:43 CDT 2017
device-mapper-event-libs-1.02.139-2.el7    BUILT: Thu Apr 13 14:37:43 CDT 2017
device-mapper-persistent-data-0.7.0-0.1.rc6.el7    BUILT: Mon Mar 27 10:15:46 CDT 2017
Comment 2 Corey Marthaler 2017-04-26 22:51:50 UTC 
Created attachment 1274454 [details]
verbose lvconvert attempt
Comment 3 David Teigland 2017-05-19 21:19:55 UTC 
Corey, this works for me, so if you can reproduce it save the core file (or better I can log in and run gdb on the machine.)
Comment 4 David Teigland 2017-05-22 14:47:51 UTC 
Saved this core if more info is needed.


Core was generated by `lvconvert --yes -R 2048.00k --type raid4 centipede2/takeover'.
Program terminated with signal 11, Segmentation fault.
#0  0x000055fee48ab8cb in _add_dev_to_dtree (dm=dm@entry=0x55fee6ab2360, 
    dtree=dtree@entry=0x55fee6a6daa0, lv=lv@entry=0x55fee6a78170, layer=layer@entry=0x0)
    at activate/dev_manager.c:1723
1723		if (!(name = dm_build_dm_name(dm->mem, lv->vg->name, lv->name, layer)))
Missing separate debuginfos, use: debuginfo-install bzip2-libs-1.0.6-13.el7.x86_64 elfutils-libelf-0.168-5.el7.x86_64 elfutils-libs-0.168-5.el7.x86_64 glibc-2.17-194.el7.x86_64 libattr-2.4.46-12.el7.x86_64 libblkid-2.23.2-39.el7.x86_64 libcap-2.22-9.el7.x86_64 libgcc-4.8.5-14.el7.x86_64 libselinux-2.5-11.el7.x86_64 libsepol-2.5-6.el7.x86_64 libuuid-2.23.2-39.el7.x86_64 ncurses-libs-5.9-13.20130511.el7.x86_64 pcre-8.32-17.el7.x86_64 readline-6.2-10.el7.x86_64 systemd-libs-219-38.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-17.el7.x86_64
(gdb) bt
#0  0x000055fee48ab8cb in _add_dev_to_dtree (dm=dm@entry=0x55fee6ab2360, 
    dtree=dtree@entry=0x55fee6a6daa0, lv=lv@entry=0x55fee6a78170, layer=layer@entry=0x0)
    at activate/dev_manager.c:1723
#1  0x000055fee48abdd0 in _add_lv_to_dtree (dm=dm@entry=0x55fee6ab2360, 
    dtree=dtree@entry=0x55fee6a6daa0, lv=0x55fee6a78170, origin_only=origin_only@entry=0)
    at activate/dev_manager.c:2030
#2  0x000055fee48ac22b in _add_lv_to_dtree (dm=dm@entry=0x55fee6ab2360, 
    dtree=dtree@entry=0x55fee6a6daa0, lv=lv@entry=0x55fee6a87150, origin_only=0)
    at activate/dev_manager.c:2185
#3  0x000055fee48afdd4 in _create_partial_dtree (origin_only=0, lv=0x55fee6a87150, 
    dm=0x55fee6ab2360) at activate/dev_manager.c:2210
#4  _tree_action (dm=dm@entry=0x55fee6ab2360, lv=lv@entry=0x55fee6a87150, 
    laopts=laopts@entry=0x7fff1dbbfd60, action=action@entry=PRELOAD)
    at activate/dev_manager.c:3102
#5  0x000055fee48b2796 in dev_manager_preload (dm=dm@entry=0x55fee6ab2360, 
    lv=lv@entry=0x55fee6a87150, laopts=laopts@entry=0x7fff1dbbfd60, 
    flush_required=flush_required@entry=0x7fff1dbbfd0c) at activate/dev_manager.c:3210
#6  0x000055fee48090a4 in _lv_preload (lv=lv@entry=0x55fee6a87150, 
    laopts=laopts@entry=0x7fff1dbbfd60, 
    flush_required=flush_required@entry=0x7fff1dbbfd0c) at activate/activate.c:1414
#7  0x000055fee480dc1d in _lv_suspend (error_if_not_suspended=0, lv_pre=0x55fee6a87150, 
    lv=0x55fee6a9b170, laopts=0x7fff1dbbfd60, 
    lvid_s=0x7fff1dbc0e80 "sNM4hOHdQ39rEw82Qp9KH6X9khLJtAcjY4fHuctxCxB8R0rMcGM0H3aDKXyx1ed---Type <return> to continue, or q <return> to quit---
w", cmd=0x55fee69c9020) at activate/activate.c:2152
#8  lv_suspend_if_active (cmd=cmd@entry=0x55fee69c9020, 
    lvid_s=lvid_s@entry=0x7fff1dbc0e80 "sNM4hOHdQ39rEw82Qp9KH6X9khLJtAcjY4fHuctxCxB8R0rMcGM0H3aDKXyx1edw", origin_only=origin_only@entry=0, exclusive=exclusive@entry=0, 
    lv=<optimized out>, lv_pre=<optimized out>) at activate/activate.c:2265
#9  0x000055fee48c3e9d in _file_lock_resource (cmd=0x55fee69c9020, 
    resource=0x7fff1dbc0e80 "sNM4hOHdQ39rEw82Qp9KH6X9khLJtAcjY4fHuctxCxB8R0rMcGM0H3aDKXyx1edw", flags=60, lv=<optimized out>) at locking/file_locking.c:114
#10 0x000055fee483ee38 in _lock_vol (cmd=cmd@entry=0x55fee69c9020, 
    resource=<optimized out>, 
    resource@entry=0x7fff1dbc0e80 "sNM4hOHdQ39rEw82Qp9KH6X9khLJtAcjY4fHuctxCxB8R0rMcGM0H3aDKXyx1edw", flags=flags@entry=60, lv_op=lv_op@entry=LV_SUSPEND, 
    lv=lv@entry=0x55fee6a87150) at locking/locking.c:275
#11 0x000055fee483f783 in lock_vol (cmd=0x55fee69c9020, vol=<optimized out>, 
    vol@entry=0x55fee6a87150 "sNM4hOHdQ39rEw82Qp9KH6X9khLJtAcjY4fHuctxCxB8R0rMcGM0H3aDKXyx1edw", flags=60, lv=lv@entry=0x55fee6a87150) at locking/locking.c:355
#12 0x000055fee484972c in _lv_update_and_reload (lv=lv@entry=0x55fee6a87150, 
    origin_only=origin_only@entry=0) at metadata/lv_manip.c:6371
#13 0x000055fee4851d07 in lv_update_and_reload (lv=lv@entry=0x55fee6a87150)
    at metadata/lv_manip.c:6397
#14 0x000055fee487efe6 in _lv_update_reload_fns_reset_eliminate_lvs (
    lv=lv@entry=0x55fee6a87150, origin_only=0, origin_only=0)
    at metadata/raid_manip.c:580
#15 0x000055fee4883716 in _takeover_upconvert_wrapper (lv=0x55fee6a87150, 
    new_segtype=0x55fee6a07590, new_image_count=<optimized out>, new_data_copies=2, 
    new_stripe_size=<optimized out>, new_region_size=<optimized out>, 
    allocate_pvs=0x55fee6a863e8, force=<optimized out>, yes=<optimized out>, 
    new_stripes=0) at metadata/raid_manip.c:5274
#16 0x000055fee48869d3 in lv_raid_convert (lv=lv@entry=0x55fee6a87150, 
    new_segtype=0x55fee6a07590, yes=1, force=0, new_stripes=0, 
    new_stripe_size_supplied=<optimized out>, new_stripe_size=128, new_region_size=4096, 
    allocate_pvs=0x55fee6a863e8) at metadata/raid_manip.c:6143
#17 0x000055fee47d121d in _lvconvert_raid (lv=lv@entry=0x55fee6a87150, 
    lp=lp@entry=0x7fff1dbc1820) at lvconvert.c:1408
#18 0x000055fee47d307c in _convert_striped_raid (cmd=<optimized out>, lp=0x7fff1dbc1820, 
    lv=0x55fee6a87150) at lvconvert.c:1617
#19 _convert_striped (lp=<optimized out>, lv=<optimized out>, cmd=<optimized out>)
    at lvconvert.c:1684
#20 _lvconvert_raid_types (cmd=cmd@entry=0x55fee69c9020, lv=lv@entry=0x55fee6a87150, 
    lp=lp@entry=0x7fff1dbc1820) at lvconvert.c:1757
#21 0x000055fee47d329a in _lvconvert_raid_types_single (cmd=cmd@entry=0x55fee69c9020, 
    lv=0x55fee6a87150, handle=handle@entry=0x55fee6a14ff8) at lvconvert.c:4249
#22 0x000055fee47f81e8 in process_each_lv_in_vg (cmd=cmd@entry=0x55fee69c9020, 
    vg=vg@entry=0x55fee6a86310, arg_lvnames=arg_lvnames@entry=0x7fff1dbc1700, 
    tags_in=tags_in@entry=0x7fff1dbc16b0, stop_on_error=stop_on_error@entry=0, 
    handle=handle@entry=0x55fee6a14ff8, 
---Type <return> to continue, or q <return> to quit---
    check_single_lv=check_single_lv@entry=0x55fee47cd2f0 <_lvconvert_raid_types_check>, 
    process_single_lv=process_single_lv@entry=0x55fee47d3220 <_lvconvert_raid_types_single>) at toollib.c:3136
#23 0x000055fee47f9634 in _process_lv_vgnameid_list (
    process_single_lv=0x55fee47d3220 <_lvconvert_raid_types_single>, 
    check_single_lv=0x55fee47cd2f0 <_lvconvert_raid_types_check>, handle=0x55fee6a14ff8, 
    arg_tags=0x7fff1dbc16b0, arg_lvnames=0x7fff1dbc16d0, arg_vgnames=0x7fff1dbc16c0, 
    vgnameids_to_process=0x7fff1dbc16f0, read_flags=1048576, cmd=0x55fee69c9020)
    at toollib.c:3631
#24 process_each_lv (cmd=cmd@entry=0x55fee69c9020, argc=argc@entry=1, 
    argv=<optimized out>, one_vgname=one_vgname@entry=0x0, 
    one_lvname=one_lvname@entry=0x0, read_flags=read_flags@entry=1048576, 
    handle=handle@entry=0x55fee6a14ff8, 
    check_single_lv=check_single_lv@entry=0x55fee47cd2f0 <_lvconvert_raid_types_check>, 
    process_single_lv=process_single_lv@entry=0x55fee47d3220 <_lvconvert_raid_types_single>) at toollib.c:3783
#25 0x000055fee47d54f8 in lvconvert_raid_types_cmd (cmd=0x55fee69c9020, 
    argc=<optimized out>, argv=<optimized out>) at lvconvert.c:4336
#26 0x000055fee47e1198 in lvm_run_command (cmd=cmd@entry=0x55fee69c9020, argc=1, 
    argc@entry=7, argv=0x7fff1dbc1ce8, argv@entry=0x7fff1dbc1cb8) at lvmcmdline.c:2951
#27 0x000055fee47e21f3 in lvm2_main (argc=7, argv=0x7fff1dbc1cb8) at lvmcmdline.c:3485
#28 0x00007f7ebab6ac05 in __libc_start_main () from /lib64/libc.so.6
#29 0x000055fee47c0ece in _start ()


(gdb) frame
#2  0x000055fee48ac22b in _add_lv_to_dtree (dm=dm@entry=0x55fee6ab2360, 
    dtree=dtree@entry=0x55fee6a6daa0, lv=lv@entry=0x55fee6a87150, origin_only=0)
    at activate/dev_manager.c:2185
2185				    !_add_lv_to_dtree(dm, dtree, seg_metalv(seg, s), 0))


Looks like the meta_areas[0] value is bad:

(gdb) p *((struct logical_volume *)(seg->meta_areas[0].u.lv.lv))
$14 = {lvid = {id = {{
        uuid = "\002\000\000\000\000\000\000\000\221\b\000\000\000\000\000\000\310\\\360\272~\177\000\000\310\\\360\272~\177\000"}, {
        uuid = "p\201\247\346\376U\000\000p\201\247\346\376U\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000"}}, 
    s = "\002\000\000\000\000\000\000\000\221\b\000\000\000\000\000\000\310\\\360\272~\177\000\000\310\\\360\272~\177\000\000p\201\247\346\376U\000\000p\201\247\346\376U\000\000\000\000\000\000\000\000\000\000\002\000\000\000\000\000\000\000\330{\250\346\376U\000"}, 
  name = 0x0, vg = 0x2, status = 94553279856408, alloc = ALLOC_INVALID, profile = 0x0, 
  read_ahead = 1634560370, major = 6251879, minor = 0, size = 0, le_count = 2065, 
  origin_count = 0, external_count = 3136314536, snapshot_segs = {
    n = 0x7f7ebaf05ca8 <main_arena+1352>, p = 0x55fee6a781f0}, 
  snapshot = 0x55fee6a781f0, rdevice = 0x55fee6a758e0, rsites = {n = 0x55fee6a179c0, 
    p = 0x55fee6a81d70}, segments = {n = 0x55fee6a78220, p = 0x0}, tags = {n = 0x0, 
    p = 0x0}, segs_using_this_lv = {n = 0x0, p = 0x0}, indirect_glvs = {n = 0x0, 
    p = 0x0}, this_glv = 0x0, timestamp = 94553279792488, new_lock_args = 0, 
  hostname = 0x55fee6a78710 "\220\202\247\346\376U", 
  lock_args = 0x55fee6a78710 "\220\202\247\346\376U"}
Comment 5 Alasdair Kergon 2017-05-24 23:15:54 UTC 
Let's retest this with the latest code (which fixed an in-memory metadata corruption problem).

If it still fails, grab fresh -vvvv traces and gdb backtraces.
Comment 6 Corey Marthaler 2017-05-26 14:30:46 UTC 
This appears to be fixed in the latest rpms. Will reopen if seen again. For testing details, see: https://bugzilla.redhat.com/show_bug.cgi?id=1441334#c14


3.10.0-651.el7.x86_64
lvm2-2.02.171-2.el7    BUILT: Wed May 24 09:02:34 CDT 2017
lvm2-libs-2.02.171-2.el7    BUILT: Wed May 24 09:02:34 CDT 2017
lvm2-cluster-2.02.171-2.el7    BUILT: Wed May 24 09:02:34 CDT 2017
device-mapper-1.02.140-2.el7    BUILT: Wed May 24 09:02:34 CDT 2017
device-mapper-libs-1.02.140-2.el7    BUILT: Wed May 24 09:02:34 CDT 2017
device-mapper-event-1.02.140-2.el7    BUILT: Wed May 24 09:02:34 CDT 2017
device-mapper-event-libs-1.02.140-2.el7    BUILT: Wed May 24 09:02:34 CDT 2017
device-mapper-persistent-data-0.7.0-0.1.rc6.el7    BUILT: Mon Mar 27 10:15:46 CDT 2017