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[Bug 1716633] Re: Installed, popular and featured snaps are loaded in parallel threads can crash

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1716633@xxxxxxxxxxxxxxxxxx>
Date: Mon, 18 Dec 2017 16:44:04 -0000
Reply-to: Bug 1716633 <1716633@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

This bug was fixed in the package gnome-software -
3.22.7-0ubuntu3.17.04.8

---------------
gnome-software (3.22.7-0ubuntu3.17.04.8) zesty; urgency=medium

  * debian/patches/0001-snap-Protect-store-cache-with-a-lock.patch:
    - Fix crash due to multiple threads accessing a cache (LP: #1716633)
  * debian/patches/0001-snap-Don-t-attempt-to-refine-snaps-without-a-valid-n.patch:
    - Fix potential crash from invalid snaps
  * debian/patches/0001-snap-Fix-leak-of-GsApp.patch:
    - Fix small memory leak
  * debian/patches/0001-snap-Only-show-snaps-as-sandboxed-if-snapd-supports-.patch:
    - Simple patch added to make above patches apply cleanly
  * debian/patches/0001-snap-Cancel-snapd-transaction-when-install-remove-ca.patch:
  * debian/patches/0001-snap-Generate-correct-error-for-cancelled-operations.patch:
    - Abort change in snapd when install/remove cancelled (LP: #1721762)
  * debian/patches/0022-snap-Use-new-Polkit-API.patch:
    - Send Polkit interactive header (LP: #1736232)
  * debian/patches/0023-snap-Support-new-snapd-license-field.patch
    - Show license field (not yet supported by Ubuntu Store / snaps)
  * debian/patches/0024-Use-the-developer-name-if-set-in-preference-to-the-p.patch:
  * debian/patches/0025-snap-Use-developer-field.patch
    - Show snap developer (LP: #1715054)
  * debian/patches/0026-snap-Correct-the-app-origin.patch:
    - Set correct store name (LP: #1706500)

 -- Robert Ancell <robert.ancell@xxxxxxxxxxxxx>  Wed, 06 Dec 2017
10:37:25 +1300

** Changed in: gnome-software (Ubuntu Zesty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1716633

Title:
  Installed, popular and featured snaps are loaded in parallel threads
  can crash

Status in gnome-software package in Ubuntu:
  Fix Released
Status in gnome-software source package in Xenial:
  Fix Released
Status in gnome-software source package in Zesty:
  Fix Released
Status in gnome-software source package in Artful:
  Fix Released
Status in gnome-software source package in Bionic:
  Fix Released

Bug description:
  [Impact]
  GNOME Software has a cache that can be accessed by multiple threads. This can cause GNOME Software to crash. This seems to have been caused by adding support for featured snaps (bug 1663097) as the popular, featured and installed snaps are all requested on different threads.

  [Test Case]
  Since this is a random crash there's not a good test case. Could be checked by looking at errors.ubuntu.com crash reports or repeated restarts of GNOME Software to see if it crashes on startup.

  [Regression Potential]
  Solution is to add a lock around this cache. Some risk of breaking related code.

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