[Bug 1778547] [NEW] Broken system lock counting

[Julian Andres Klode]

Public bug reported:

[Impact]
System lock unrefing is broken, off-by-one error. Locking twice opens a second fd for the lock file, and the old fd gets lost and remains open for the remaining duration of the program

[Test case]
TODO

[Regression potential]
TODO

** Affects: apt (Ubuntu)
     Importance: Undecided
         Status: Fix Committed

** Affects: apt (Ubuntu Xenial)
     Importance: Undecided
         Status: Confirmed

** Affects: apt (Ubuntu Artful)
     Importance: Undecided
         Status: Confirmed

** Affects: apt (Ubuntu Bionic)
     Importance: Undecided
         Status: Triaged

** Changed in: apt (Ubuntu)
       Status: New => Fix Committed

** Also affects: apt (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: apt (Ubuntu Artful)
   Importance: Undecided
       Status: New

** Also affects: apt (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: apt (Ubuntu Bionic)
       Status: New => Triaged

** Changed in: apt (Ubuntu Artful)
       Status: New => Confirmed

** Changed in: apt (Ubuntu Xenial)
       Status: New => Confirmed

** Description changed:

- System lock unrefing is broken, off-by-one error.
+ [Impact]
+ System lock unrefing is broken, off-by-one error. Locking twice opens a second fd for the lock file, and the old fd gets lost and remains open for the remaining duration of the program
+ 
+ [Test case]
+ TODO
+ 
+ [Regression potential]
+ TODO

-- 
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https://bugs.launchpad.net/bugs/1778547

Title:
  Broken system lock counting

Status in apt package in Ubuntu:
  Fix Committed
Status in apt source package in Xenial:
  Confirmed
Status in apt source package in Artful:
  Confirmed
Status in apt source package in Bionic:
  Triaged

Bug description:
  [Impact]
  System lock unrefing is broken, off-by-one error. Locking twice opens a second fd for the lock file, and the old fd gets lost and remains open for the remaining duration of the program

  [Test case]
  TODO

  [Regression potential]
  TODO

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