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HID: core: check parameters when sending/receiving data from the device

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It is better to check them soon enough before triggering any kernel panic.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2014-02-10 12:58:59 -05:00 • committed by Jiri Kosina
parent 7e0bc880fc
commit 5318251744
2 changed files with 7 additions and 1 deletions
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6
include/linux/hid.h
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@ -989,6 +989,9 @@ static inline int hid_hw_raw_request(struct hid_device *hdev,
unsigned char reportnum, __u8 *buf,
size_t len, unsigned char rtype, int reqtype)
{
if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
return -EINVAL;
if (hdev->ll_driver->raw_request)
return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
rtype, reqtype);
@ -1008,6 +1011,9 @@ static inline int hid_hw_raw_request(struct hid_device *hdev,
static inline int hid_hw_output_report(struct hid_device *hdev, __u8 *buf,
size_t len)
{
if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
return -EINVAL;
if (hdev->ll_driver->output_report)
return hdev->ll_driver->output_report(hdev, buf, len);