4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
---
drivers/hid/hid-cypress.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/hid/hid-cypress.c
+++ b/drivers/hid/hid-cypress.c
@@ -39,6 +39,9 @@ static __u8 *cp_report_fixup(struct hid_
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;
--
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