[Bug 1804673] Re: gnutls causes gnome-music segmentation fault

[Julian Andres Klode]

status

* hddemux is OK essentially; it's the same failure as I fixed in ubuntu1 in disco
* apt OK
* systemd mostly usual boot-smoke failure, one fsckd service failure (timing related probably), nothing particularly gnutls related
* gnupg2 is irrelevant gpgv-win32 test failing because wine is not installable
* gnustep-base ? retried
* lxc ? retried

gnustep-base and lxc fail only on one arch, so should not be caused by
disabling version overrides on a rehandshake (there's nothing arch
specific about it...).

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https://bugs.launchpad.net/bugs/1804673

Title:
  gnutls causes gnome-music segmentation fault

Status in gnome-music package in Ubuntu:
  Invalid
Status in gnutls28 package in Ubuntu:
  Fix Released
Status in gnome-music source package in Cosmic:
  Invalid
Status in gnutls28 source package in Cosmic:
  Fix Committed
Status in gnome-music source package in Disco:
  Invalid
Status in gnutls28 source package in Disco:
  Fix Released

Bug description:
  [Impact]
  Apps using libsoup crash in gnutls28 sometimes. gnome-music is useless if it needs to fetch cover art

  [Test case]

  $ pull-lp-source libsoup2.4
  $ cd libsoup2.4-*
  $ ./debian/rules/build
  $ ./obj-x86_64-linux-gnu/examples/get https://tracker.debian.org/pkg/acpi-support/rss

  Make sure it does not segfault

  [Regression potential]
  This changes the code to not reset priorities after or during initial negotiation, so if the user changed priorities, we do not override the chosen one from the initial handshake in a rehandshake.

  Therefore, the only problems could be thus related to rehandshakes
  that could now fail and succeeded before.

  [Original bug report]

  gnome-music gives segmentation fault on startup in Cosmic Cuttlefish
  release.

  gbd on core file gives:
  (gdb) bt
  #0  0x0000000000000000 in ?? ()
  #1  0x00007f6446dc74d0 in gnutls_aead_cipher_encryptv ()
     from /usr/lib/x86_64-linux-gnu/libgnutls.so.30
  #2  0x00007f6446d94ed7 in ?? () from /usr/lib/x86_64-linux-gnu/libgnutls.so.30
  #3  0x00007f6446d90f3c in ?? () from /usr/lib/x86_64-linux-gnu/libgnutls.so.30
  #4  0x00007f6446d9acc1 in ?? () from /usr/lib/x86_64-linux-gnu/libgnutls.so.30
  #5  0x00007f6446d9cc28 in ?? () from /usr/lib/x86_64-linux-gnu/libgnutls.so.30
  #6  0x00007f6446ddd190 in ?? () from /usr/lib/x86_64-linux-gnu/libgnutls.so.30
  #7  0x00007f6446ddd2be in gnutls_session_key_update ()
     from /usr/lib/x86_64-linux-gnu/libgnutls.so.30
  #8  0x00007f644002e54f in ?? ()
     from /usr/lib/x86_64-linux-gnu/gio/modules/libgiognutls.so
  #9  0x00007f644002eb36 in ?? ()
     from /usr/lib/x86_64-linux-gnu/gio/modules/libgiognutls.so
  #10 0x00007f646645ac03 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
  #11 0x00007f64668ebad3 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  #12 0x00007f64668eb135 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
  #13 0x00007f6467761164 in start_thread (arg=<optimized out>)
      at pthread_create.c:486
  #14 0x00007f6467894def in clone ()
      at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

  Looks like Fedora had same issue, tracked down to an issue in gnutls. See
  https://bugzilla.redhat.com/show_bug.cgi?id=1640062 and
  https://bugzilla.redhat.com/show_bug.cgi?id=1634736

  Description:	Ubuntu 18.10
  Release:	18.10

  gnome-music:
    Installed: 3.30.1-1
    Candidate: 3.30.1-1

  libgnutls30:
    Installed: 3.6.4-2ubuntu1
    Candidate: 3.6.4-2ubuntu1

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