APT unlocks in same order as it locks

This bug was fixed in the package apt - 1.8.2+19.10

---------------
apt (1.8.2+19.10) eoan; urgency=medium

  * Upload to eoan

apt (1.8.2) unstable; urgency=medium

  [ Alwin Henseler ]
  * Flip /: in documented default value of DPkg::Path (Closes: #917986)

  [ TilmanK ]
  * Fix typo in German manpage translation

  [ Américo Monteiro ]
  * Portuguese manpages translation update (Closes: #926614)

  [ Jean-Pierre Giraud ]
  * French manpages translation update (Closes: #929290)

  [ Michael Zhivich ]
  * methods: https: handle requests for TLS re-handshake (LP: #1829861)

  [ Julian Andres Klode ]
  * Unlock dpkg locks in reverse locking order (LP: #1829860)

 -- Julian Andres Klode <email address hidden> Tue, 28 May 2019 23:25:22 +0200

Hello Julian, or anyone else affected,

Accepted apt into disco-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/apt/1.8.3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-disco to verification-done-disco. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-disco. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

All autopkgtests for the newly accepted apt (1.8.3) for disco have finished running.
The following regressions have been reported in tests triggered by the package:

auto-apt-proxy/11 (armhf)
reprotest/0.7.8 (amd64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/disco/update_excuses.html#apt

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

Hello Julian, or anyone else affected,

Accepted apt into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/apt/1.6.12 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

All autopkgtests for the newly accepted apt (1.6.12) for bionic have finished running.
The following regressions have been reported in tests triggered by the package:

sbuild/0.75.0-1ubuntu1 (ppc64el)
apport/2.20.9-0ubuntu7.7 (amd64, i386)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/bionic/update_excuses.html#apt

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

So disco, 1.8.3:

at the start:
openat(AT_FDCWD, "/var/lib/dpkg/lock-frontend", O_RDWR|O_CREAT|O_NOFOLLOW, 0640) = 4
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
fcntl(4, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0
openat(AT_FDCWD, "/var/lib/dpkg/lock", O_RDWR|O_CREAT|O_NOFOLLOW, 0640) = 5
fcntl(5, F_SETFD, FD_CLOEXEC) = 0
fcntl(5, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0

end of run:

close(5) = 0
close(4) = 0
close(3) = 0

=> we unlock in reverse as we want.

Same for bionic 1.6.12:

openat(AT_FDCWD, "/var/lib/dpkg/lock-frontend", O_RDWR|O_CREAT|O_NOFOLLOW, 0640) = 4
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
fcntl(4, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0
openat(AT_FDCWD, "/var/lib/dpkg/lock", O_RDWR|O_CREAT|O_NOFOLLOW, 0640) = 5
fcntl(5, F_SETFD, FD_CLOEXEC) = 0
fcntl(5, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0

end of run:

close(5) = 0
close(4) = 0
close(3) = 0

Oh, as I wrote on the other bugs, autopkgtest regressions all went away, except for apport, which had the usual random failure also present in earlier failures.

This bug was fixed in the package apt - 1.8.3

---------------
apt (1.8.3) unstable; urgency=medium

  [ Simon Körner ]
  * http: Fix Host header in proxied https connections (LP: #1838771)

  [ Brian Murray ]
  * Do not include squashfs file systems in df output. (LP: #1756595)

apt (1.8.2) unstable; urgency=medium

  [ Alwin Henseler ]
  * Flip /: in documented default value of DPkg::Path (Closes: #917986)

  [ TilmanK ]
  * Fix typo in German manpage translation

  [ Américo Monteiro ]
  * Portuguese manpages translation update (Closes: #926614)

  [ Jean-Pierre Giraud ]
  * French manpages translation update (Closes: #929290)

  [ Michael Zhivich ]
  * methods: https: handle requests for TLS re-handshake (LP: #1829861)

  [ Julian Andres Klode ]
  * Unlock dpkg locks in reverse locking order (LP: #1829860)

 -- Julian Andres Klode <email address hidden> Fri, 09 Aug 2019 11:16:15 +0200

The verification of the Stable Release Update for apt has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

This bug was fixed in the package apt - 1.6.12

---------------
apt (1.6.12) bionic; urgency=medium

  [ TilmanK ]
  * Fix typo in German manpage translation

  [ Michael Zhivich ]
  * methods: https: handle requests for TLS re-handshake (LP: #1829861)

  [ Julian Andres Klode ]
  * Unlock dpkg locks in reverse locking order (LP: #1829860)

  [ Simon Körner ]
  * http: Fix Host header in proxied https connections (LP: #1838771)

  [ Brian Murray ]
  * Do not include squashfs file systems in df output. (LP: #1756595)

 -- Julian Andres Klode <email address hidden> Tue, 03 Sep 2019 12:05:35 +0200