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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-02-01 02:09:08 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-02-01 21:33:21 +0300 |
| commit | 6ecfe51b4082e7cff12609f97daa052ae04b61fd (patch) | |
| tree | 46c4182f9166fc447c462eb5bdb52a3cb4d4837a /drivers/input | |
| parent | 73d8ef76006b649f9c272cb4473039e25fcc9908 (diff) | |
| download | linux-6ecfe51b4082e7cff12609f97daa052ae04b61fd.tar.xz | |
Input: refuse to register absolute devices without absinfo
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.
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/input.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c index 6a75bb08b9ff..067d648028a2 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -2091,6 +2091,12 @@ 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); |