lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20070712055235.GA8693@schatzie.adilger.int>
Date:	Wed, 11 Jul 2007 23:52:35 -0600
From:	Andreas Dilger <adilger@...sterfs.com>
To:	Theodore Tso <tytso@....edu>
Cc:	Kalpak Shah <kalpak@...sterfs.com>,
	linux-ext4 <linux-ext4@...r.kernel.org>
Subject: Re: Random corruption test for e2fsck

I've got another one, but it isn't a show stopper I think.

If you format a filesystem with both resize_inode and meta_bg you get an
unfixable filesystem.  The bad news is that it appears that running
e2fsck on the filesystem is actually _causing_ the corruption in this case
(trying to rebuild the resize inode)?  For now, the answer is "don't do that".
The resize inode was never intended to be in use when meta_bg is enabled,
so we should just prevent this from the start.


mke2fs  -j -b 4096 -I 512 -O sparse_super,filetype,resize_inode,dir_index,lazy_bg,meta_bg -F /tmp/test.img 57852

I can run e2fsck on this repeatedly and it always complains the same way:

$ e2fsck -fy /tmp/test.img
e2fsck 1.39.cfs9 (7-Apr-2007)
Resize inode not valid.  Recreate? yes

Pass 1: Checking inodes, blocks, and sizes
Inode 8, i_blocks is 0, should be 32816.  Fix? yes

Reserved inode 9 (<Reserved inode 9>) has invalid mode.  Clear? yes
Deleted inode 17 has zero dtime.  Fix? yes
Deleted inode 25 has zero dtime.  Fix? yes
Deleted inode 33 has zero dtime.  Fix? yes
Deleted inode 41 has zero dtime.  Fix? yes
Deleted inode 49 has zero dtime.  Fix? yes
Deleted inode 57 has zero dtime.  Fix? yes
Deleted inode 65 has zero dtime.  Fix? yes
Deleted inode 73 has zero dtime.  Fix? yes
Deleted inode 81 has zero dtime.  Fix? yes
Deleted inode 89 has zero dtime.  Fix? yes

Pass 2: Checking directory structure
Inode 2 (???) has invalid mode (00).
Clear? yes

Entry '..' in ??? (2) has deleted/unused inode 2.  Clear? yes

Inode 11 (???) has invalid mode (00).
Clear? yes

Pass 3: Checking directory connectivity
Root inode not allocated.  Allocate? yes

/lost+found not found.  Create? yes

Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences:  +0 +(2--14) +(16--3619) +(3621--3622) +(3625--7727)
Fix? yes

Free blocks count wrong for group #0 (25039, counted=25041).
Fix? yes

Free blocks count wrong (46503, counted=46505).
Fix? yes

Inode bitmap differences:  +(3--10) -16
Fix? yes

Free inodes count wrong for group #0 (28918, counted=28917).
Fix? yes

Directories count wrong for group #0 (3, counted=2).
Fix? yes

Free inodes count wrong (57846, counted=57845).
Fix? yes


/tmp/test.img: ***** FILE SYSTEM WAS MODIFIED *****
/tmp/test.img: 11/57856 files (9.1% non-contiguous), 11347/57852 blocks


Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

-
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ