From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit 1ebb71143758f45dc0fa76e2f48429e13b16d110 upstream.
Make sure we have enough of a report structure to validate before
looking at it.
Reported-by: Benoit Camredon <benoit.camredon@xxxxxxxxxx>
Tested-by: Benoit Camredon <benoit.camredon@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
---
drivers/hid/hid-cypress.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/hid/hid-cypress.c b/drivers/hid/hid-cypress.c
index c4ef3bc726e3..e299576004ce 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;
--
2.11.0
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