dumpe2fs/dump/restore not working correctly for ext4?

dumpe2fs/dump/restore not working correctly for ext4?

[Justin Piszcz]

Hi,

I need to look into this more obviously and try other dumps etc, but I 
even tried extracting a single (smaller) directory and it also segfaulted, 
has dump been tested properly with ext4?

# restore -f ../p34-root-2010-03-02.ext4dump -r .
Segmentation fault (core dumped)

(gdb) bt full
#0  0x000000000040d03d in ?? ()
No symbol table info available.
#1  0x000000000040d336 in ?? ()
No symbol table info available.
#2  0x000000000040e1a4 in ?? ()
No symbol table info available.
#3  0x0000000000408d5b in ?? ()
No symbol table info available.
#4  0x0000000000407d92 in ?? ()
No symbol table info available.
#5  0x00007f8df3361abd in __libc_start_main () from /lib/libc.so.6
No symbol table info available.
#6  0x0000000000403019 in ?? ()
No symbol table info available.
#7  0x00007fffa98b8bb8 in ?? ()
No symbol table info available.
#8  0x000000000000001c in ?? ()
No symbol table info available.
#9  0x0000000000000005 in ?? ()
No symbol table info available.
#10 0x00007fffa98b8e18 in ?? ()
No symbol table info available.
#11 0x00007fffa98b8e20 in ?? ()
No symbol table info available.
#12 0x00007fffa98b8e23 in ?? ()
No symbol table info available.
#13 0x00007fffa98b8e43 in ?? ()
No symbol table info available.
#14 0x00007fffa98b8e46 in ?? ()
No symbol table info available.
#15 0x0000000000000000 in ?? ()
No symbol table info available.
(gdb)

Justin.

Re: dumpe2fs/dump/restore not working correctly for ext4?

[Justin Piszcz]

On Thu, 4 Mar 2010, Justin Piszcz wrote:

> Hi,
>
> I need to look into this more obviously and try other dumps etc, but I even 
> tried extracting a single (smaller) directory and it also segfaulted, has 
> dump been tested properly with ext4?
>
> # restore -f ../p34-root-2010-03-02.ext4dump -r .
> Segmentation fault (core dumped)

And from another day:

p34:/x2/bup/p34/2010-03-01/d# restore -f ../p34-root-2010-03-01.ext4dump 
-r .
Segmentation fault (core dumped)
p34:/x2/bup/p34/2010-03-01/d# ls
a/      core.restore.18181  l2/          nfs/             sbin/     var/
app@    dev/                lib/         opt/             selinux/  x@
appc@   etc/                lib64@       proc/            sys/      x2@
bin/    home/               lost+found/  r1/              tmp/      x3@
boot/   initrd/             media/       restoresymtable  usr/      x4@
cdrom@  l1/                 mnt/         root/            vapp@     x5@
p34:/x2/bup/p34/2010-03-01/d#

Does anyone use dump/restore with ext4?

Justin.

Re: dumpe2fs/dump/restore not working correctly for ext4?

[tytso]

On Thu, Mar 04, 2010 at 10:19:57AM -0500, Justin Piszcz wrote:
> Hi,
> 
> I need to look into this more obviously and try other dumps etc, but
> I even tried extracting a single (smaller) directory and it also
> segfaulted, has dump been tested properly with ext4?

Was dump/restore statically or dynamically linked?  And with which
version of libext2fs from e2fsprogs?

						- Ted

Re: dumpe2fs/dump/restore not working correctly for ext4?

[Justin Piszcz]

On Thu, 4 Mar 2010, tytso@mit.edu wrote:

> On Thu, Mar 04, 2010 at 10:19:57AM -0500, Justin Piszcz wrote:
>> Hi,
>>
>> I need to look into this more obviously and try other dumps etc, but
>> I even tried extracting a single (smaller) directory and it also
>> segfaulted, has dump been tested properly with ext4?
>
> Was dump/restore statically or dynamically linked?  And with which
> version of libext2fs from e2fsprogs?
>
> 						- Ted
>

Hi,

I tried restoring from two different datasets on one machine <10GB and another
one ~30GB, all files are corrupted, other users report the same problem:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=511651
https://lists.ubuntu.com/archives/universe-bugs/2009-June/098729.html

Per your requests:

They are dynamically linked.
This is standard Debian Testing x86_64, nothing custom (in the 
distribution).

p34:~# ldd `which dump`
         linux-vdso.so.1 =>  (0x00007fff93192000)
         libext2fs.so.2 => /lib/libext2fs.so.2 (0x00007f0bdf559000)
         libcom_err.so.2 => /lib/libcom_err.so.2 (0x00007f0bdf356000)
         libblkid.so.1 => /lib/libblkid.so.1 (0x00007f0bdf141000)
         libuuid.so.1 => /lib/libuuid.so.1 (0x00007f0bdef3d000)
         libc.so.6 => /lib/libc.so.6 (0x00007f0bdebe9000)
         libpthread.so.0 => /lib/libpthread.so.0 (0x00007f0bde9cc000)
         /lib64/ld-linux-x86-64.so.2 (0x00007f0bdf79a000)
p34:~# ldd `which restore`
         linux-vdso.so.1 =>  (0x00007fff857ed000)
         libext2fs.so.2 => /lib/libext2fs.so.2 (0x00007f5b5c3cd000)
         libcom_err.so.2 => /lib/libcom_err.so.2 (0x00007f5b5c1ca000)
         libe2p.so.2 => /lib/libe2p.so.2 (0x00007f5b5bfc3000)
         libreadline.so.5 => /lib/libreadline.so.5 (0x00007f5b5bd83000)
         libncurses.so.5 => /lib/libncurses.so.5 (0x00007f5b5bb3e000)
         libc.so.6 => /lib/libc.so.6 (0x00007f5b5b7e9000)
         libpthread.so.0 => /lib/libpthread.so.0 (0x00007f5b5b5cd000)
         /lib64/ld-linux-x86-64.so.2 (0x00007f5b5c60e000)
         libdl.so.2 => /lib/libdl.so.2 (0x00007f5b5b3c9000)
p34:~# dpkg -l | grep libext2fs
p34:~# dpkg -l | grep libe2fs
p34:~# dpkg -l | grep e2fs
ii  e2fslibs                             1.41.10-1                  ext2/ext3/ext4 file system libraries
ii  e2fsprogs                            1.41.10-1                  ext2/ext3/ext4 file system utilities
p34:~#

p34:~# dpkg -S /lib/libext2fs.so.2
e2fslibs: /lib/libext2fs.so.2
p34:~#

Justin.