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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-06 15:33:36 +0100 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:51:19 +0200 |
| commit | 333121d7dad07f71fa0f286568be24149d7b35f4 (patch) | |
| tree | 0f1ae9de90f24d326a5e46f77b615a6b678b6297 /drivers/hid | |
| parent | e5770726463b22eafc90f77ea73d8c50f71f773e (diff) | |
HID: hid-cypress: validate length of report
commit 1ebb71143758f45dc0fa76e2f48429e13b16d110 upstream.
Make sure we have enough of a report structure to validate before
looking at it.
Reported-by: Benoit Camredon <benoit.camredon@airbus.com>
Tested-by: Benoit Camredon <benoit.camredon@airbus.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-cypress.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hid/hid-cypress.c b/drivers/hid/hid-cypress.c index c4ef3bc72..e29957600 100644 --- a/drivers/hid/hid-cypress.c +++ b/drivers/hid/hid-cypress.c @@ -39,6 +39,9 @@ static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX)) return rdesc; + if (*rsize < 4) + return rdesc; + for (i = 0; i < *rsize - 4; i++) if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) { __u8 tmp; |