** Also affects: duplicity (Ubuntu Lucid)
Importance: Undecided
Status: New
** Also affects: duplicity (Ubuntu Precise)
Importance: Undecided
Status: New
** Also affects: duplicity (Ubuntu Raring)
Importance: Undecided
Status: New
** Also affects: duplicity (Ubuntu Saucy)
Importance: Undecided
Status: New
** Also affects: duplicity (Ubuntu Quantal)
Importance: Undecided
Status: New
--
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https://bugs.launchpad.net/bugs/1252484
Title:
Possible data loss when restarting in the middle of a deleted file
Status in Duplicity - Bandwidth Efficient Encrypted Backup:
Fix Committed
Status in “duplicity” package in Ubuntu:
New
Status in “duplicity” source package in Lucid:
New
Status in “duplicity” source package in Precise:
New
Status in “duplicity” source package in Quantal:
New
Status in “duplicity” source package in Raring:
New
Status in “duplicity” source package in Saucy:
New
Bug description:
This was recently fixed in duplicity trunk. But I'm filing a bug for
paperwork purposes and for Ubuntu SRUs.
[Impact]
When restarting a backup, duplicity may accidentally skip the first
65k chunk of one of the source files. This means that when it is
restored, it will be incomplete/corrupted, resulting in data loss.
[Test Case]
mkdir /tmp/source
dd if=/dev/urandom of=/tmp/source/bigfile bs=1024 count=5000
# This next command will intentionally fail after the second volume!
duplicity --no-encryption full /tmp/source file:///tmp/backup --vol 1 --fail 2
mv /tmp/source/bigfile /tmp/source/newfile
duplicity --no-encryption full /tmp/source file:///tmp/backup
duplicity --no-encryption restore file:///tmp/backup /tmp/restore
# This next line will say the files differ if the bug is present
diff /tmp/source/newfile /tmp/restore/newfile
[Regression Potential]
It's a relatively small patch, only affecting the specific case of
restarting a backup when the file we were in the middle of is no
longer there. I'd say minor regression potential.
To manage notifications about this bug go to:
https://bugs.launchpad.net/duplicity/+bug/1252484/+subscriptions
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