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SDL_keyboard.c: Add bounds guards when assigning to the scancode array.

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Based on a patch by Jochen Schäfer <josch1710@live.de> :
On a T420 pressing the ACPI button for volume control, big scancodes
were emitted. This was causing an overflow, because missing guards.
This commit is contained in:
Ozkan Sezer 2021-06-12 08:00:50 +03:00
parent eb15b4e962
commit d28437de3c
1 changed files with 5 additions and 2 deletions
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5
src/events/SDL_keyboard.c
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@ -605,6 +605,9 @@ SDL_SetKeymap(int start, SDL_Keycode * keys, int length)
void void
SDL_SetScancodeName(SDL_Scancode scancode, const char *name) SDL_SetScancodeName(SDL_Scancode scancode, const char *name)
{ {
if (scancode >= SDL_NUM_SCANCODES) {
return;
}
SDL_scancode_names[scancode] = name; SDL_scancode_names[scancode] = name;
} }
@ -675,7 +678,7 @@ SDL_SendKeyboardKeyInternal(Uint8 source, Uint8 state, SDL_Scancode scancode)
Uint32 type; Uint32 type;
Uint8 repeat = SDL_FALSE; Uint8 repeat = SDL_FALSE;
if (scancode == SDL_SCANCODE_UNKNOWN) { if (scancode == SDL_SCANCODE_UNKNOWN || scancode >= SDL_NUM_SCANCODES) {
return 0; return 0;
} }