X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fhid%2Fhid-cypress.c;fp=kernel%2Fdrivers%2Fhid%2Fhid-cypress.c;h=1689568b597d4e5bb8824ccbe679f627525bf2a4;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=1b764d1745f3daa693a17ee706c302ff31ae0f0e;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

diff --git a/kernel/drivers/hid/hid-cypress.c b/kernel/drivers/hid/hid-cypress.c
index 1b764d174..1689568b5 100644
--- a/kernel/drivers/hid/hid-cypress.c
+++ b/kernel/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) {
 			rdesc[i] = 0x19;