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Fixed bug 4910 - Missing joystick-driver type check in haptic

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meyraud705

On Linux and MacOS, some haptic system functions access joystick->hw_data without checking the driver type.
This commit is contained in:
Sam Lantinga
2019-12-22 13:56:50 -08:00
parent f21e172767
commit 982f8a83ec
2 changed files with 20 additions and 2 deletions
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11
src/haptic/linux/SDL_syshaptic.c
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@@ -512,6 +512,9 @@ SDL_SYS_HapticMouse(void)
int
SDL_SYS_JoystickIsHaptic(SDL_Joystick * joystick)
{
if (joystick->driver != &SDL_LINUX_JoystickDriver) {
return 0;
}
return EV_IsHaptic(joystick->hwdata->fd);
}
@@ -522,6 +525,9 @@ SDL_SYS_JoystickIsHaptic(SDL_Joystick * joystick)
int
SDL_SYS_JoystickSameHaptic(SDL_Haptic * haptic, SDL_Joystick * joystick)
{
if (joystick->driver != &SDL_LINUX_JoystickDriver) {
return 0;
}
/* We are assuming Linux is using evdev which should trump the old
* joystick methods. */
if (SDL_strcmp(joystick->hwdata->fname, haptic->hwdata->fname) == 0) {
@@ -541,7 +547,10 @@ SDL_SYS_HapticOpenFromJoystick(SDL_Haptic * haptic, SDL_Joystick * joystick)
int fd;
int ret;
SDL_hapticlist_item *item;
if (joystick->driver != &SDL_LINUX_JoystickDriver) {
return -1;
}
/* Find the joystick in the haptic list. */
for (item = SDL_hapticlist; item; item = item->next) {
if (SDL_strcmp(item->fname, joystick->hwdata->fname) == 0) {