registry team mailing list archive

[Marcel Stimberg <marcelcoding@xxxxxxxxxxxxxx>]

** Description changed:

  Binary package hint: tar
  
  I have a backup script which is doing incremental backups on NFS share.
  I am using an -g (--listed-incremental) option for that purpose. If the
  snapshot file does not exists (which means tar is doing full backups)
  everything works flawlessly. The problem occur whenever incremental
  backup has to be taken. Tar crashes immediately with Segmentation Fault
  error. I have tried to isolate NFS issues and copied the snapshot file
  to local storage and instructed tar to put the archive to local drive as
- well. The result was exactly the same. When i tried with copying just
- small amount of data problem did not occur. I have recently migrated
- from Gentoo where tar worked perfectly with this setup.
+ well. The result was exactly the same. The problem occurs whenever the
+ root directory "/" is included in the backup.
+ 
+ TEST CASE:
+   $ tar cpf /tmp/test.tar -g /tmp/snap / --exclude="*"
+   $ tar cpf /tmp/test.tar -g /tmp/snap / --exclude="*"
+   Segmentation fault
+ 
+ After applying the fix in the linked branch, tar no longer segfaults. The patch is taken from this upstream commit:
+ http://git.savannah.gnu.org/cgit/tar.git/commit/?id=e21d54e8cd3d8026ad56f90cc6bde831106c2cb9
+ 
+ The bug is a regression introduced in Maverick.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: tar 1.23-2
  ProcVersionSignature: Ubuntu 2.6.35-22.35-server 2.6.35.4
  Uname: Linux 2.6.35-22-server x86_64
  Architecture: amd64
  Date: Thu Dec  9 00:12:35 2010
  InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcEnviron:
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  SourcePackage: tar
+ 
+ == Regression details ==
+ Discovered in version: 1.23-2
+ Last known good version: 1.22-2ubuntu1

** Summary changed:

- tar crashes with SIGSEGV when used with --listed-incremental option 
+ tar crashes with SIGSEGV when used with --listed-incremental option  and including the root directory

** Tags added: regression-release

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https://bugs.launchpad.net/bugs/687594

Title:
  tar crashes with SIGSEGV when used with --listed-incremental option  and including the root directory