[Touch-packages] [Bug 1701570] Re: Acquire.run(): crash with "double free or corruption"
** Tags added: trusty
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https://bugs.launchpad.net/bugs/1701570
Title:
Acquire.run(): crash with "double free or corruption"
Status in python-apt package in Ubuntu:
Triaged
Bug description:
We tried to implement a function returning an Acquire object
"fetcher". Whenever we called "fetcher.run()" after generating the
object using this function our program crashed with "*** Error in
`/usr/bin/python': double free or corruption (fasttop): .. ***.
You can reproduce this with the attached example code ("func=1"); the
package to download must not be in the local archive. When you set
"func=0" in this example the code works as expected.
Our researches indicate that Acquire.run() seems to depend on data
structures (memory) of the PackageManager object "pm". In
"pm.get_archives(fetcher, ...)" the "fetcher" object stores pointers
to data structures owned by PackageManager object "pm". This data
structures (filenames) are needed for "fetcher.run()". But in the case
"func=1" the PackageManager pm object is automatically freed by Python
as soon as function "initFetcher(progress)" is left. Therefore the
pointers stored in Acquire object "fetcher" are no longer valid.
# lsb_release -rd
Description:Ubuntu 14.04.5 LTS
Release:14.04
python-apt 0.9.3.5ubuntu2 amd64
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1701570/+subscriptions
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[Touch-packages] [Bug 1701570] Re: Acquire.run(): crash with "double free or corruption"
** Changed in: python-apt (Ubuntu)
Importance: Undecided => High
** Changed in: python-apt (Ubuntu)
Status: New => Triaged
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to python-apt in Ubuntu.
https://bugs.launchpad.net/bugs/1701570
Title:
Acquire.run(): crash with "double free or corruption"
Status in python-apt package in Ubuntu:
Triaged
Bug description:
We tried to implement a function returning an Acquire object
"fetcher". Whenever we called "fetcher.run()" after generating the
object using this function our program crashed with "*** Error in
`/usr/bin/python': double free or corruption (fasttop): .. ***.
You can reproduce this with the attached example code ("func=1"); the
package to download must not be in the local archive. When you set
"func=0" in this example the code works as expected.
Our researches indicate that Acquire.run() seems to depend on data
structures (memory) of the PackageManager object "pm". In
"pm.get_archives(fetcher, ...)" the "fetcher" object stores pointers
to data structures owned by PackageManager object "pm". This data
structures (filenames) are needed for "fetcher.run()". But in the case
"func=1" the PackageManager pm object is automatically freed by Python
as soon as function "initFetcher(progress)" is left. Therefore the
pointers stored in Acquire object "fetcher" are no longer valid.
# lsb_release -rd
Description:Ubuntu 14.04.5 LTS
Release:14.04
python-apt 0.9.3.5ubuntu2 amd64
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1701570/+subscriptions
--
Mailing list: https://launchpad.net/~touch-packages
Post to : touch-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~touch-packages
More help : https://help.launchpad.net/ListHelp
