diff --git a/drivers/media/tuners/mxl5005s.c b/drivers/media/tuners/mxl5005s.c
index 3a509038c8df..06dfab9fb8cb 100644
--- a/drivers/media/tuners/mxl5005s.c
+++ b/drivers/media/tuners/mxl5005s.c
@@ -3423,9 +3423,11 @@ static u16 MXL_ControlWrite_Group(struct dvb_frontend *fe, u16 controlNum,
 
 			if (controlNum == state->Init_Ctrl[i].Ctrl_Num) {
 
-				highLimit = 1 << state->Init_Ctrl[i].size;
+				u16 size = min_t(u16, state->Init_Ctrl[i].size,
+					       ARRAY_SIZE(state->Init_Ctrl[i].val));
+				highLimit = 1 << size;
 				if (value < highLimit) {
-					for (j = 0; j < state->Init_Ctrl[i].size; j++) {
+					for (j = 0; j < size; j++) {
 						state->Init_Ctrl[i].val[j] = (u8)((value >> j) & 0x01);
 						MXL_RegWriteBit(fe, (u8)(state->Init_Ctrl[i].addr[j]),
 							(u8)(state->Init_Ctrl[i].bit[j]),
@@ -3442,9 +3444,11 @@ static u16 MXL_ControlWrite_Group(struct dvb_frontend *fe, u16 controlNum,
 
 			if (controlNum == state->CH_Ctrl[i].Ctrl_Num) {
 
-				highLimit = 1 << state->CH_Ctrl[i].size;
+				u16 size = min_t(u16, state->CH_Ctrl[i].size,
+					       ARRAY_SIZE(state->CH_Ctrl[i].val));
+				highLimit = 1 << size;
 				if (value < highLimit) {
-					for (j = 0; j < state->CH_Ctrl[i].size; j++) {
+					for (j = 0; j < size; j++) {
 						state->CH_Ctrl[i].val[j] = (u8)((value >> j) & 0x01);
 						MXL_RegWriteBit(fe, (u8)(state->CH_Ctrl[i].addr[j]),
 							(u8)(state->CH_Ctrl[i].bit[j]),