CBA_fnc_addKeybind memory exhaustion

[MaHuJa]

Arma 3 Version: 1.72 current stable
CBA Version: 3.4.0 'stable'. (3.3.1 tested to work).

Mods:

- CBA_A3

Description:

• Out of memory crash on function call
• Alive takes up all of the ram and never loads to the main menu ALiVEOS/ALiVE.OS#339

Steps to reproduce:

• In controls, user, set 'user action 20' to alt+` (key left of 1)
• Run

tmp = [(ActionKeys "User20" select 0),[false,false,false]];
["ALiVE","openMenu", "Open Menu (Requires Restart)", {playsound "HintCollapse"}, {}, tmp] call CBA_fnc_addKeybind;

FWIW (ActionKeys "User20" select 0) returns 9.39524e+008 in this case.

Where did the issue occur?

• On game start if running @alive mod, else done in editor.

RPT log file:

• https://gist.github.com/MaHuJa/f92851380fc199714262513ef797f961

[PabstMirror]

Key codes above 255 don't make sense
https://community.bistudio.com/wiki/actionKeys
has some info on the mess that the command returns, but it doesn't seem usable if it's bound with modifies

#638 (comment) - life found a way 😄

[MaHuJa]

A change on the repro - I unbound the user20 key, so the tmp was printed as [<null>,[false,false,false]] and the issue still occurs.

[PabstMirror]

Start editor and open debug console and run

tmp = [0,[false,false,false]];
["ALiVE","openMenu", "Open Menu (Requires Restart)", {playsound "HintCollapse"}, {}, tmp, false, 0, true] call CBA_fnc_addKeybind;

Hopefully that should overwrite the saved setting in your profile and fix the issue for now

[MaHuJa]

Next repro was setting appmenu (22) and it crashed. Calling it with 0 did not crash. After which 22 also worked.

Conclusion: running it with tmp = [0,[false,false,false]]; fixed the problem, and apparently (combined with a sane keybind value) permanently.