Message-ID: <87sirnp2m3.fsf@openvz.org>
Date:	Thu, 13 Feb 2014 17:24:20 +0400
From:	Dmitry Monakhov <dmonakhov@...nvz.org>
To:	Jon Bernard <jbernard@...ion.com>, linux-ext4@...r.kernel.org
CC:	Theodore Ts'o <tytso@....edu>
Subject: Re: kernel bug at fs/ext4/resize.c:409

On Thu, 6 Feb 2014 16:08:44 -0500, Jon Bernard <jbernard@...ion.com> wrote:
Non-text part: multipart/mixed
> * Theodore Ts'o <tytso@....edu> wrote:
> > On Mon, Feb 03, 2014 at 01:26:34PM -0500, Jon Bernard wrote:
> > > Hello all,
> > > 
> > > A coworker is seeing the following bug when attempting to resize a root
> > > volume (during init by calling resizefs) from 1GB to the size of the
> > > underlying partition size of 20GB.
> > > 
> > > If the partition size is changed (to i.e. 10GB), the bug seems to not
> > > trigger.  I have access to this machine, if there are any experiments
> > > that would provide more useful information - please let me know.
> > 
> > Here are three questions to start:
> > 
> > 1)  What kernel version was this oops coming from?
> 
> 3.12.9-301.fc20.x86_64
> 
> > 2)  Could you please send me the output of dumpe2fs of the file system?
> 
> Dump attached.
> 
> > 3)  Can you reproduce the problem?
> 
> It happens every time with this particular filesystem image.  A new
> image built with slightly different variables (size, contents, etc)
> usually yields a filesystem that behaves correctly.  But once they have
> a bad one, it breaks on resize every time.
> 
> Let me know if I can provide any other information.  I have access to
> the machine for some time, so I can run a modified kernel or module and
> post results if that would help.
> 
> Thanks,
> 
Yepp..  same BUGON was recently triggered by one of our customers
on ovzkernel kernel which is based on RHEL6's (2.6.32) kernel:
Resize the image /vz/private/2345.private_temporary-XXXX/root.hdd to
536870912K
resize2fs 1.42.3 (14-May-2012)
Filesystem at /dev/ploop15153p1 is mounted on
/vz/private/2345.private_temporary-XXXX/root.hdd/root.hds.mnt; on-line
resizing required
old_desc_blocks = 1, new_desc_blocks = 32
<4>[ 1043.647040] ------------[ cut here ]------------
<2>[ 1043.647067] kernel BUG at fs/ext4/resize.c:375!

But after that image was destroyed, and we can not reproduce this bug at
the moment.

Can you please share image created via e2image and blkimage size:
#e2image -r /dev/$YOUR_DEV - | bzip2 > img.e2i.bz2
#blockdev --getsz /dev/$YOUR_DEV
and resize2fs arguments.
> -- 
> Jon
> Filesystem volume name:   cloudimg-rootfs
> Last mounted on:          /
> Filesystem UUID:          942e3be7-4655-4250-8de4-7e6ffb5595e2
> Filesystem magic number:  0xEF53
> Filesystem revision #:    1 (dynamic)
> Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
> Filesystem flags:         signed_directory_hash 
> Default mount options:    user_xattr acl
> Filesystem state:         clean
> Errors behavior:          Continue
> Filesystem OS type:       Linux
> Inode count:              1080816
> Block count:              1080688
> Reserved block count:     54034
> Free blocks:              338604
> Free inodes:              948273
> First block:              0
> Block size:               4096
> Fragment size:            4096
> Reserved GDT blocks:      1024
> Blocks per group:         32768
> Fragments per group:      32768
> Inodes per group:         32752
> Inode blocks per group:   2047
> Flex block group size:    16
> Filesystem created:       Mon Feb  3 15:25:08 2014
> Last mount time:          Thu Feb  6 18:41:42 2014
> Last write time:          Thu Feb  6 18:41:41 2014
> Mount count:              18
> Maximum mount count:      -1
> Last checked:             Mon Feb  3 15:25:08 2014
> Check interval:           0 (<none>)
> Lifetime writes:          69 MB
> Reserved blocks uid:      0 (user root)
> Reserved blocks gid:      0 (group root)
> First inode:              11
> Inode size:	          256
> Required extra isize:     28
> Desired extra isize:      28
> Journal inode:            8
> First orphan inode:       19343
> Default directory hash:   half_md4
> Directory Hash Seed:      8f043eea-0268-4208-9167-34286deca46f
> Journal backup:           inode blocks
> Journal features:         journal_incompat_revoke
> Journal size:             64M
> Journal length:           16384
> Journal sequence:         0x00000030
> Journal start:            1
> 
> 
> Group 0: (Blocks 0-32767) [ITABLE_ZEROED]
>   Checksum 0xf064, unused inodes 0
>   Primary superblock at 0, Group descriptors at 1-1
>   Reserved GDT blocks at 2-1025
>   Block bitmap at 1026 (+1026), Inode bitmap at 1042 (+1042)
>   Inode table at 1058-3104 (+1058)
>   0 free blocks, 0 free inodes, 5537 directories
>   Free blocks: 
>   Free inodes: 
> Group 1: (Blocks 32768-65535) [ITABLE_ZEROED]
>   Checksum 0xfcf6, unused inodes 12736
>   Backup superblock at 32768, Group descriptors at 32769-32769
>   Reserved GDT blocks at 32770-33793
>   Block bitmap at 1027 (bg #0 + 1027), Inode bitmap at 1043 (bg #0 + 1043)
>   Inode table at 3105-5151 (bg #0 + 3105)
>   0 free blocks, 12736 free inodes, 565 directories, 12736 unused inodes
>   Free blocks: 
>   Free inodes: 52769-65504
> Group 2: (Blocks 65536-98303) [ITABLE_ZEROED]
>   Checksum 0x2191, unused inodes 30532
>   Block bitmap at 1028 (bg #0 + 1028), Inode bitmap at 1044 (bg #0 + 1044)
>   Inode table at 5152-7198 (bg #0 + 5152)
>   0 free blocks, 30532 free inodes, 2220 directories, 30532 unused inodes
>   Free blocks: 
>   Free inodes: 67725-98256
> Group 3: (Blocks 98304-131071) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0xec2b, unused inodes 32752
>   Backup superblock at 98304, Group descriptors at 98305-98305
>   Reserved GDT blocks at 98306-99329
>   Block bitmap at 1029 (bg #0 + 1029), Inode bitmap at 1045 (bg #0 + 1045)
>   Inode table at 7199-9245 (bg #0 + 7199)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 98257-131008
> Group 4: (Blocks 131072-163839) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0xf126, unused inodes 32752
>   Block bitmap at 1030 (bg #0 + 1030), Inode bitmap at 1046 (bg #0 + 1046)
>   Inode table at 9246-11292 (bg #0 + 9246)
>   132 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 157084-157087, 157184-157311
>   Free inodes: 131009-163760
> Group 5: (Blocks 163840-196607) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x374c, unused inodes 32752
>   Backup superblock at 163840, Group descriptors at 163841-163841
>   Reserved GDT blocks at 163842-164865
>   Block bitmap at 1031 (bg #0 + 1031), Inode bitmap at 1047 (bg #0 + 1047)
>   Inode table at 11293-13339 (bg #0 + 11293)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 163761-196512
> Group 6: (Blocks 196608-229375) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0xa529, unused inodes 32752
>   Block bitmap at 1032 (bg #0 + 1032), Inode bitmap at 1048 (bg #0 + 1048)
>   Inode table at 13340-15386 (bg #0 + 13340)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 196513-229264
> Group 7: (Blocks 229376-262143) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x496e, unused inodes 32752
>   Backup superblock at 229376, Group descriptors at 229377-229377
>   Reserved GDT blocks at 229378-230401
>   Block bitmap at 1033 (bg #0 + 1033), Inode bitmap at 1049 (bg #0 + 1049)
>   Inode table at 15387-17433 (bg #0 + 15387)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 229265-262016
> Group 8: (Blocks 262144-294911) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0xa147, unused inodes 32752
>   Block bitmap at 1034 (bg #0 + 1034), Inode bitmap at 1050 (bg #0 + 1050)
>   Inode table at 17434-19480 (bg #0 + 17434)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 262017-294768
> Group 9: (Blocks 294912-327679) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x06e4, unused inodes 32752
>   Backup superblock at 294912, Group descriptors at 294913-294913
>   Reserved GDT blocks at 294914-295937
>   Block bitmap at 1035 (bg #0 + 1035), Inode bitmap at 1051 (bg #0 + 1051)
>   Inode table at 19481-21527 (bg #0 + 19481)
>   2 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 305491-305492
>   Free inodes: 294769-327520
> Group 10: (Blocks 327680-360447) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x53e4, unused inodes 32752
>   Block bitmap at 1036 (bg #0 + 1036), Inode bitmap at 1052 (bg #0 + 1052)
>   Inode table at 21528-23574 (bg #0 + 21528)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 327521-360272
> Group 11: (Blocks 360448-393215) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x2764, unused inodes 32752
>   Block bitmap at 1037 (bg #0 + 1037), Inode bitmap at 1053 (bg #0 + 1053)
>   Inode table at 23575-25621 (bg #0 + 23575)
>   52 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 385319, 385339, 385473, 386011, 386047, 386055, 386065, 386103, 386121, 386141, 386471, 386603, 386615, 386639, 386647, 386679, 386705, 386723, 386731, 386761, 386785, 386797, 386993, 387001, 387023, 387321, 388387, 388555, 388683, 388717, 388743, 389071, 389107, 389155, 389173, 389195, 389295, 389735, 390187, 390223, 390783, 390945, 390987, 391015, 391127, 392079, 392581, 392593, 392611, 392903, 393027, 393087
>   Free inodes: 360273-393024
> Group 12: (Blocks 393216-425983) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0xb54a, unused inodes 32752
>   Block bitmap at 1038 (bg #0 + 1038), Inode bitmap at 1054 (bg #0 + 1054)
>   Inode table at 25622-27668 (bg #0 + 25622)
>   10189 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 397607, 397623, 397635, 397743, 398211, 398543, 398591, 398717, 398759, 399111, 399263, 399343, 400071, 400143, 400203, 400211, 400219, 400241, 400319, 402071, 402379, 402431, 402731, 402763, 402771, 402839, 402859, 402867, 403057, 403079, 403091, 403147, 403433-403455, 415819-416255, 416271, 416273, 416277-416280, 416285-416287, 416291-416313, 416319-425983
>   Free inodes: 393025-425776
> Group 13: (Blocks 425984-458751) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
>   Checksum 0xedd5, unused inodes 32752
>   Block bitmap at 1039 (bg #0 + 1039), Inode bitmap at 1055 (bg #0 + 1055)
>   Inode table at 27669-29715 (bg #0 + 27669)
>   32768 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 425984-458751
>   Free inodes: 425777-458528
> Group 14: (Blocks 458752-491519) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
>   Checksum 0x3f13, unused inodes 32752
>   Block bitmap at 1040 (bg #0 + 1040), Inode bitmap at 1056 (bg #0 + 1056)
>   Inode table at 29716-31762 (bg #0 + 29716)
>   32768 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 458752-491519
>   Free inodes: 458529-491280
> Group 15: (Blocks 491520-524287) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x5e51, unused inodes 32752
>   Block bitmap at 1041 (bg #0 + 1041), Inode bitmap at 1057 (bg #0 + 1057)
>   Inode table at 33794-35840 (bg #1 + 1026)
>   16384 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 507904-524287
>   Free inodes: 491281-524032
> Group 16: (Blocks 524288-557055) [ITABLE_ZEROED]
>   Checksum 0x7c5f, unused inodes 0
>   Block bitmap at 524288 (+0), Inode bitmap at 524304 (+16)
>   Inode table at 524320-526366 (+32)
>   0 free blocks, 0 free inodes, 2275 directories
>   Free blocks: 
>   Free inodes: 
> Group 17: (Blocks 557056-589823) [ITABLE_ZEROED]
>   Checksum 0x1b57, unused inodes 0
>   Block bitmap at 524289 (bg #16 + 1), Inode bitmap at 524305 (bg #16 + 17)
>   Inode table at 526367-528413 (bg #16 + 2079)
>   0 free blocks, 0 free inodes, 3615 directories
>   Free blocks: 
>   Free inodes: 
> Group 18: (Blocks 589824-622591) [ITABLE_ZEROED]
>   Checksum 0x2677, unused inodes 22195
>   Block bitmap at 524290 (bg #16 + 2), Inode bitmap at 524306 (bg #16 + 18)
>   Inode table at 528414-530460 (bg #16 + 4126)
>   0 free blocks, 22196 free inodes, 826 directories, 22195 unused inodes
>   Free blocks: 
>   Free inodes: 600087, 600094-622288
> Group 19: (Blocks 622592-655359) [ITABLE_ZEROED]
>   Checksum 0x89be, unused inodes 31008
>   Block bitmap at 524291 (bg #16 + 3), Inode bitmap at 524307 (bg #16 + 19)
>   Inode table at 530461-532507 (bg #16 + 6173)
>   0 free blocks, 31008 free inodes, 1744 directories, 31008 unused inodes
>   Free blocks: 
>   Free inodes: 624033-655040
> Group 20: (Blocks 655360-688127) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x3b1a, unused inodes 32752
>   Block bitmap at 524292 (bg #16 + 4), Inode bitmap at 524308 (bg #16 + 20)
>   Inode table at 532508-534554 (bg #16 + 8220)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 655041-687792
> Group 21: (Blocks 688128-720895) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0xd75d, unused inodes 32752
>   Block bitmap at 524293 (bg #16 + 5), Inode bitmap at 524309 (bg #16 + 21)
>   Inode table at 534555-536601 (bg #16 + 10267)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 687793-720544
> Group 22: (Blocks 720896-753663) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x051e, unused inodes 32752
>   Block bitmap at 524294 (bg #16 + 6), Inode bitmap at 524310 (bg #16 + 22)
>   Inode table at 536602-538648 (bg #16 + 12314)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 720545-753296
> Group 23: (Blocks 753664-786431) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x1a1c, unused inodes 32752
>   Block bitmap at 524295 (bg #16 + 7), Inode bitmap at 524311 (bg #16 + 23)
>   Inode table at 538649-540695 (bg #16 + 14361)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 753297-786048
> Group 24: (Blocks 786432-819199) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0xb213, unused inodes 32752
>   Block bitmap at 524296 (bg #16 + 8), Inode bitmap at 524312 (bg #16 + 24)
>   Inode table at 540696-542742 (bg #16 + 16408)
>   0 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 
>   Free inodes: 786049-818800
> Group 25: (Blocks 819200-851967) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x79b0, unused inodes 32752
>   Backup superblock at 819200, Group descriptors at 819201-819201
>   Reserved GDT blocks at 819202-820225
>   Block bitmap at 524297 (bg #16 + 9), Inode bitmap at 524313 (bg #16 + 25)
>   Inode table at 542743-544789 (bg #16 + 18455)
>   20736 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 827392-835583, 839075-839091, 839140-839536, 839809-840191, 840193-840196, 840198, 840201, 840207, 840214-840217, 840219-840221, 840223-840231, 840237, 840239, 840246-851967
>   Free inodes: 818801-851552
> Group 26: (Blocks 851968-884735) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
>   Checksum 0x0506, unused inodes 32752
>   Block bitmap at 524298 (bg #16 + 10), Inode bitmap at 524314 (bg #16 + 26)
>   Inode table at 544790-546836 (bg #16 + 20502)
>   32768 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 851968-884735
>   Free inodes: 851553-884304
> Group 27: (Blocks 884736-917503) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x049f, unused inodes 32752
>   Backup superblock at 884736, Group descriptors at 884737-884737
>   Reserved GDT blocks at 884738-885761
>   Block bitmap at 524299 (bg #16 + 11), Inode bitmap at 524315 (bg #16 + 27)
>   Inode table at 546837-548883 (bg #16 + 22549)
>   31742 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 885762-917503
>   Free inodes: 884305-917056
> Group 28: (Blocks 917504-950271) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
>   Checksum 0xe183, unused inodes 32752
>   Block bitmap at 524300 (bg #16 + 12), Inode bitmap at 524316 (bg #16 + 28)
>   Inode table at 548884-550930 (bg #16 + 24596)
>   32768 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 917504-950271
>   Free inodes: 917057-949808
> Group 29: (Blocks 950272-983039) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
>   Checksum 0x0dc4, unused inodes 32752
>   Block bitmap at 524301 (bg #16 + 13), Inode bitmap at 524317 (bg #16 + 29)
>   Inode table at 550931-552977 (bg #16 + 26643)
>   32768 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 950272-983039
>   Free inodes: 949809-982560
> Group 30: (Blocks 983040-1015807) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
>   Checksum 0xdf87, unused inodes 32752
>   Block bitmap at 524302 (bg #16 + 14), Inode bitmap at 524318 (bg #16 + 30)
>   Inode table at 552978-555024 (bg #16 + 28690)
>   32768 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 983040-1015807
>   Free inodes: 982561-1015312
> Group 31: (Blocks 1015808-1048575) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
>   Checksum 0xc085, unused inodes 32752
>   Block bitmap at 524303 (bg #16 + 15), Inode bitmap at 524319 (bg #16 + 31)
>   Inode table at 555025-557071 (bg #16 + 30737)
>   32768 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 1015808-1048575
>   Free inodes: 1015313-1048064
> Group 32: (Blocks 1048576-1080687) [INODE_UNINIT, ITABLE_ZEROED]
>   Checksum 0x4600, unused inodes 32752
>   Block bitmap at 1048576 (+0), Inode bitmap at 1048592 (+16)
>   Inode table at 1048608-1050654 (+32)
>   30063 free blocks, 32752 free inodes, 0 directories, 32752 unused inodes
>   Free blocks: 1048577-1048591, 1048593-1048607, 1050655-1080687
>   Free inodes: 1048065-1080816
--
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