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path: root/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
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Diffstat (limited to 'drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c')
-rw-r--r--drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
index 5b682cc..e407185 100644
--- a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
+++ b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
@@ -561,6 +561,13 @@ static void ttusb_process_muxpack(struct ttusb *ttusb, const u8 * muxpack,
{
u16 csum = 0, cc;
int i;
+
+ if (len < 4 || len & 0x1) {
+ pr_warn("%s: muxpack has invalid len %d\n", __func__, len);
+ numinvalid++;
+ return;
+ }
+
for (i = 0; i < len; i += 2)
csum ^= le16_to_cpup((__le16 *) (muxpack + i));
if (csum) {
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