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authorKees Cook <keescook@chromium.org>2013-09-11 21:56:50 +0200
committerJiri Kosina <jkosina@suse.cz>2013-09-13 15:11:21 +0200
commit331415ff16a12147d57d5c953f3a961b7ede348b (patch)
tree79a497ffd03b720215e567c9c9862090fc76d0fa /include
parentb04c99e3b845892d754ee8052d6324c39c4040de (diff)
HID: provide a helper for validating hid reports
Many drivers need to validate the characteristics of their HID report during initialization to avoid misusing the reports. This adds a common helper to perform validation of the report exisitng, the field existing, and the expected number of values within the field. Signed-off-by: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include')
-rw-r--r--include/linux/hid.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/hid.h b/include/linux/hid.h
index ee1ffc5e19c9..31b9d299ef6c 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -756,6 +756,10 @@ u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
struct hid_device *hid_allocate_device(void);
struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
+struct hid_report *hid_validate_values(struct hid_device *hid,
+ unsigned int type, unsigned int id,
+ unsigned int field_index,
+ unsigned int report_counts);
int hid_open_report(struct hid_device *device);
int hid_check_keys_pressed(struct hid_device *hid);
int hid_connect(struct hid_device *hid, unsigned int connect_mask);