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Diffstat (limited to 'drivers/media/dvb-frontends')
-rw-r--r--drivers/media/dvb-frontends/ascot2e.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/media/dvb-frontends/ascot2e.c b/drivers/media/dvb-frontends/ascot2e.c
index ae7e463c2f9b..f770f6a2c987 100644
--- a/drivers/media/dvb-frontends/ascot2e.c
+++ b/drivers/media/dvb-frontends/ascot2e.c
@@ -26,6 +26,8 @@
#include "ascot2e.h"
#include "dvb_frontend.h"
+#define MAX_WRITE_REGSIZE 10
+
enum ascot2e_state {
STATE_UNKNOWN,
STATE_SLEEP,
@@ -120,16 +122,22 @@ static int ascot2e_write_regs(struct ascot2e_priv *priv,
u8 reg, const u8 *data, u32 len)
{
int ret;
- u8 buf[len+1];
+ u8 buf[MAX_WRITE_REGSIZE + 1];
struct i2c_msg msg[1] = {
{
.addr = priv->i2c_address,
.flags = 0,
- .len = sizeof(buf),
+ .len = len + 1,
.buf = buf,
}
};
+ if (len + 1 >= sizeof(buf)) {
+ dev_warn(&priv->i2c->dev,"wr reg=%04x: len=%d is too big!\n",
+ reg, len + 1);
+ return -E2BIG;
+ }
+
ascot2e_i2c_debug(priv, reg, 1, data, len);
buf[0] = reg;
memcpy(&buf[1], data, len);