If device is supposed to send absolute events (i.e. EV_ABS bit is set in dev->evbit) but dev->absinfo is not allocated, then the driver has done something wrong, and we should not register such device. Otherwise we'll crash later, when driver tries to send absolute event.
Signed-off-by: Dmitry Torokhov <[email protected]> --- drivers/input/input.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/input/input.c b/drivers/input/input.c index f0d2d45a68e3..4617f2db9e36 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -2095,6 +2095,12 @@ int input_register_device(struct input_dev *dev) const char *path; int error; + if (test_bit(EV_ABS, dev->evbit) && !dev->absinfo) { + dev_err(&dev->dev, + "Absolute device without dev->absinfo, refusing to register\n"); + return -EINVAL; + } + if (dev->devres_managed) { devres = devres_alloc(devm_input_device_unregister, sizeof(struct input_devres), GFP_KERNEL); -- 2.11.0.483.g087da7b7c-goog -- Dmitry
