Thank you for your contribution.
I am uploading this fix to Ubuntu 16.10 now. It will need to be manually
approved by the Ubuntu SRU Team before the update is available for
testing.
** Description changed:
Impact
------
The Chess app in Ubuntu 16.10 will crash when trying to promote a pawn.
gnome-chess is not installed by default by any current Ubuntu flavors.
Test Case
---------
1. Open the Chess app and click Preferences in the app menu. Change Opposing
Player to Human. Close Preferences.
2. Make a move then click New Game to start a new game without a computer
player.
3. Move a pawn to the far end of the board to promote it to Queen.
Does Chess crash after promoting?
Regression Potential
--------------------
Low. This patch only affects pawn promotion which currently causes the game
to crash so this is definitely an improvement.
Other Info
----------
- I discussed this patch with Michael Catanzaro, the gnome-chess maintainer who
had this to say:
- "That patch is one way to work around it... the workaround I used in Fedora
is to not use any hardening flags when compiling the package. If anyone's
computer gets hacked because someone finds a way to get code execution via
malformed Portable Game Notation, then accept my apologies in advance. ;)"
+ There are 3 ways to fix this bug:
+ 1) Build gnome-chess without hardening flags. (This is the approach taken in
Fedora 25).
+ 2) Apply a minimal workaround patch to gnome-chess. The patch was
acknowledged by the gnome-chess maintainer, but he preferred to push for a
proper fix in vala instead.
+ 3) Fix this in vala (it was fixed in vala 0.36 and 0.34.7) and then rebuild
gnome-chess against the new vala.
+
+ I initially did #2 in Ubuntu 17.04 Beta (zesty) but will replace it with
+ #3.
+
+ I am using #2 for Ubuntu 16.10 since it seems a more minimal SRU.
This only affect Ubuntu 16.10 since that was the first release where we
opted gnome-chess into all available hardening flags.
** Changed in: gnome-chess (Ubuntu Yakkety)
Status: Triaged => In Progress
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https://bugs.launchpad.net/bugs/1659828
Title:
gnome-chess crash on pawn promotion
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