modesetting: Reset output_id if drmModeGetConnector failed
If drmModeGetConnector() fails in drmmode_output_detect(), we have to reset the output_id to -1 too. Yet another spot leading to a potential NULL dereference when handling the mode_output member as output_id was != -1. Though, this case should be very hard to hit. Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Daniel Martin <consume.noise@gmail.com>
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@ -1151,8 +1151,10 @@ drmmode_output_detect(xf86OutputPtr output)
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drmmode_output->mode_output =
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drmModeGetConnector(drmmode->fd, drmmode_output->output_id);
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if (!drmmode_output->mode_output)
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if (!drmmode_output->mode_output) {
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drmmode_output->output_id = -1;
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return XF86OutputStatusDisconnected;
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}
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switch (drmmode_output->mode_output->connection) {
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case DRM_MODE_CONNECTED:
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