[Bug 1507211] Re: aptitude segfaults during dependency resolution

[Richard Hansen]

** Description changed:

+ [Impact]
+ 
+ Aptitude regularly crashes when trying to mark packages for deletion due
+ to an infinite loop in a recursive function (improperly handled circular
+ dependencies).
+ 
+ [Test Case]
+ 
+ 1. start up aptitude:  sudo aptitude
+ 2. open up a flat package view:  Ctrl-T -> Views -> New Flat Package List
+ 3. type 'l' to limit the displayed packages
+ 4. enter "~i!~M" (without the quotes) to only show manually installed packages
+ 5. select each package one at a time and mark it for purge by pressing '_' (underscore)
+ 
+ If the bug is not fixed, aptitude will eventually crash (run the 'reset'
+ command to fix your terminal's state once that happens).
+ 
+ [Regression Potential]
+ 
+ The patch alters the logic used to automatically mark packages for
+ deletion.  Any regressions should appear there.
+ 
+ The patch is cherry-picked from the upstream Git repository, so upstream
+ recognizes the bug and approves of this fix.  However, upstream might
+ have committed additional related changes (e.g., to fix a hypothetical
+ flaw in this patch) without us realizing it.
+ 
+ [Original Description]
+ 
  Hi.
  
  I just installed a new Ubuntu MATE 15.10 for my mom and I was selecting
  packages when aptitude simply crashed. I am using (for reasons beyond my
  control right now) the 32 bit version if that matters.
  
  I don't know if I can reproduce the problem or not, but I may try
  (despite the fact I do not have frequent access to this computer).
  
  If any further information is needed, please let me know.
  
  Thanks,
  
  Rogério Brito.
  
  ProblemType: Crash
  DistroRelease: Ubuntu 15.10
  Package: aptitude 0.7.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-11-generic i686
  NonfreeKernelModules: wl
  ApportVersion: 2.19.1-0ubuntu2
  Architecture: i386
  Date: Sat Oct 17 21:17:03 2015
  ExecutablePath: /usr/bin/aptitude-curses
  InstallationDate: Installed on 2015-10-17 (0 days ago)
  InstallationMedia: Ubuntu-MATE 15.10 "Wily Werewolf" - Alpha i386 (20150924)
  ProcCmdline: aptitude
  SegvAnalysis: Skipped: missing required field "Disassembly"
  Signal: 11
  SourcePackage: aptitude
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
  
  == Regression details ==
  Discovered in version: 0.7.3-1ubuntu1
  Last known good version: 0.6.11-1ubuntu3

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https://bugs.launchpad.net/bugs/1507211

Title:
  aptitude segfaults during dependency resolution

Status in aptitude package in Ubuntu:
  Fix Released
Status in aptitude package in Debian:
  Fix Released

Bug description:
  [Impact]

  Aptitude regularly crashes when trying to mark packages for deletion
  due to an infinite loop in a recursive function (improperly handled
  circular dependencies).

  [Test Case]

  1. start up aptitude:  sudo aptitude
  2. open up a flat package view:  Ctrl-T -> Views -> New Flat Package List
  3. type 'l' to limit the displayed packages
  4. enter "~i!~M" (without the quotes) to only show manually installed packages
  5. select each package one at a time and mark it for purge by pressing '_' (underscore)

  If the bug is not fixed, aptitude will eventually crash (run the
  'reset' command to fix your terminal's state once that happens).

  [Regression Potential]

  The patch alters the logic used to automatically mark packages for
  deletion.  Any regressions should appear there.

  The patch is cherry-picked from the upstream Git repository, so
  upstream recognizes the bug and approves of this fix.  However,
  upstream might have committed additional related changes (e.g., to fix
  a hypothetical flaw in this patch) without us realizing it.

  [Original Description]

  Hi.

  I just installed a new Ubuntu MATE 15.10 for my mom and I was
  selecting packages when aptitude simply crashed. I am using (for
  reasons beyond my control right now) the 32 bit version if that
  matters.

  I don't know if I can reproduce the problem or not, but I may try
  (despite the fact I do not have frequent access to this computer).

  If any further information is needed, please let me know.

  Thanks,

  Rogério Brito.

  ProblemType: Crash
  DistroRelease: Ubuntu 15.10
  Package: aptitude 0.7.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-11-generic i686
  NonfreeKernelModules: wl
  ApportVersion: 2.19.1-0ubuntu2
  Architecture: i386
  Date: Sat Oct 17 21:17:03 2015
  ExecutablePath: /usr/bin/aptitude-curses
  InstallationDate: Installed on 2015-10-17 (0 days ago)
  InstallationMedia: Ubuntu-MATE 15.10 "Wily Werewolf" - Alpha i386 (20150924)
  ProcCmdline: aptitude
  SegvAnalysis: Skipped: missing required field "Disassembly"
  Signal: 11
  SourcePackage: aptitude
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  == Regression details ==
  Discovered in version: 0.7.3-1ubuntu1
  Last known good version: 0.6.11-1ubuntu3

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