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HID: fix oops in hid_check_keys_pressed()

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If the device is not claimed by hid-input (i.e devices driver by userspace
hiddev/hidraw-based drivers, or completely detached from HID
and driver by libusb), we must not check the hid->inptus, as it
is not guaranteed to be initialized, as this is performed only for devices
handled by hid-input.

Reported-by: Guillaume Chazarain <guichaz@gmail.com>
Tested-by: Guillaume Chazarain <guichaz@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Jiri Kosina 2009-05-02 00:02:57 +02:00
parent 89092ddd7a
commit e5288eb5ea
1 changed files with 3 additions and 0 deletions
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3
drivers/hid/hid-core.c
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@ -1825,6 +1825,9 @@ int hid_check_keys_pressed(struct hid_device *hid)
struct hid_input *hidinput;
int i;
if (!(hid->claimed & HID_CLAIMED_INPUT))
return 0;
list_for_each_entry(hidinput, &hid->inputs, list) {
for (i = 0; i < BITS_TO_LONGS(KEY_MAX); i++)
if (hidinput->input->key[i])